-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathf_noisesim.c
1035 lines (894 loc) · 43.8 KB
/
f_noisesim.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <math.h>
#include <time.h>
#define BUFFERMAX 4096
typedef struct { // TRANSMISSION SYSTEM DEFINITION
// PHYSICAL PARAMETERS
float Bit_Slot; // bit slot period
float Duty_Cycle;
float B; // bit rate [bits/s]
float dt; // time resolution
// NUMERICAL PARAMETERS
unsigned int N_Bits; // # bits
unsigned int NPtos_Bit; // # samples per bit slot
unsigned long int NPtos_Tot; // total # samples
} GENDRIVE;
typedef struct { // DEVICES DESCRIPTION
float alpha; // [dB/km] fibre attenuation coefficient
float length; // [km] total fibre path length
float FAtt1; // [dB] Attenuation Tx -> EDFAin
float EDFAgain; // [dB] Gain at EDFA <fixed approx>
float FAtt2; // [dB] Attenuation EDFAout -> Rx
float M; // photodetector (APD) amplification
float R; // photodetector (PD) responsivity
int Efilt_CutOff; // [GHz] PD electrical filter bandwidth
int Ofilt_CutOff; // [GHz] PD optical input filter bandwidth
float CentralNu; // [Hz] carrier central frequency
float sim_BW; // [Hz] simulation bandwidth
float r_BW; // [Hz] reference bandwidth
unsigned int Range; // Sampling range: even numbers -> effective range SP +- SP/2
unsigned int Min; //
} DeviceSTR;
typedef struct { // GAUSSIAN PULSE DEFINITION
float P; // [W] Tx output power
float P_peak; // [W] peak power
float A_peak; // [sqrt{W}] peak amplitude |A_peak|^2= P_peak
float P_0; // [W] bit 0 power
float A_0; // [sqrt{W}] bit 0 amplitude
float C; // [1] chirp parameter
float CentringFactor; // [1] pulse position factor, as bit slot proportion (<1)
float FWHM_pow; // [s] FWHM signal in power
float T_0_amp; // [s] T_0=T_{fwhmPOW}/(2* sqrt(ln(2) ) ) half of width at 1/e intensity point = Gaussian sigma
unsigned int m; // Super Gaussian pulse shape factor (Gaussian=1)
float r_ex; // [1] Extinction ratio (P_1/ P_0) [Agrawal (4.6.1)]
} SuperGaussian;
typedef struct {
short Eye;
short LinkVectors;
short Pmeans;
} FLAGS;
void InputParameters(GENDRIVE *Carrier, SuperGaussian *Gauss, DeviceSTR *Network) {
// GENDRVIE Carrier
(*Carrier).NPtos_Bit= pow(2,6); // # points for each bit slot
(*Carrier).Duty_Cycle= 1.0/3.0;
(*Carrier).B= 10E9; // bit rate [bits/s] (10 Gbits/s)
(*Carrier).Bit_Slot= 1/ (*Carrier).B; // 1/B [s]
(*Carrier).dt= (*Carrier).Bit_Slot/ (*Carrier).NPtos_Bit; // time step [s]
// printf("Bit_Slot= %.3f ps\n",(*Carrier).Bit_Slot*1E12);
// printf("Resolucion temporal= %.3f ps\n",(*Carrier).dt*1E12);
// General
float c= 299792458; // [m/s] light speed
float Lambda_0= 1.55E-6; // [m] carrier wavelength
(*Network).CentralNu= c/ Lambda_0; // [Hz] carrier frequency
float Br= 1E-10; // [m] 0.1 nm reference bandwidth
(*Network).sim_BW= 1/ (2* (*Carrier).dt); // [Hz] simulation bandwidth
(*Network).r_BW= c* Br/ (Lambda_0* Lambda_0); // [Hz] 0.1 nm reference -> frequency range
// printf("BW= %e\n",(*Network).r_BW); // TEST
// DeviceSTR Network
// Attenuations and amplification
float FAtt1= -2.0 -1.0 -25.0; // [dB] Tx -> EDFAin 2dB fibre, 1.0dB insertion, 25 dB 128x1 splitter
(*Network).FAtt1= pow(10, FAtt1/ 20); // [1] Tx -> EDFAin for amplitude
float FAtt2= -2.0 -1.0 -25.0; // [dB] EDFAout -> Rx 2dB fibre, 1.0dB insertion, 25 dB 1x128 splitter
(*Network).FAtt2= pow(10.0, FAtt2/ 20.0); // [1] EDFAout -> Rx amplitude
float EDFAgain= 27.0; // [dB] Gain at EDFA <fixed approx>
(*Network).EDFAgain= pow(10.0, EDFAgain/ 20.0); // [1] Gain at EDFA amplitude
// printf("FAtt2= %3e\n",(*Network).FAtt2); // TEST
// Photodetector
(*Network).M= 10; // [1] APD detector amplifier gain
(*Network).R= 1.2; // [A/W] detector responsivity for 1550 nm
// Filters
(*Network).Efilt_CutOff= 14; // [GHz] cut-off freq electrical filter
(*Network).Ofilt_CutOff= 12.5; // [GHz] cut-off freq optical filter
// Sampling range
(*Network).Range= 4; // even numbers -> effective range SP +- SP/2
// SuperGaussian Gauss
// Tx power
float P= 2.0; // [dBm] Tx output power < PX2-1541SF >
(*Gauss).P= pow(10.0, P/ 10.0)/ 1000; // [W] Tx output power
// printf("P[W]= %e\n",(*Gauss).P); // TEST
// Pulse shape
(*Gauss).m= 4; // Gaussian=1
(*Gauss).CentringFactor= 0.25; // [1] 0.25 -> towards bit slot start edge, 0.5 centres pulse
(*Gauss).FWHM_pow= (*Carrier).Duty_Cycle* (*Carrier).Bit_Slot; // [s] in power (|E|^2)
(*Gauss).T_0_amp= (*Gauss).FWHM_pow/(2* sqrt(log(2) ) ); // [s]
// (*Gauss).T_0_amp=0.25*(*Carrier).Duty_Cycle*(*Carrier).Bit_Slot; // as Duty_Cycle fraction
}
float Onoise (DeviceSTR *Network) {
float h= 6.626E-34; // [J s] Planck constant
float G= (*Network).EDFAgain* (*Network).EDFAgain; // [1] EDFA power gain
float n_sp= 3.5; // [1]
float nu= (*Network).CentralNu; // [Hz]
float S_sp= (G- 1)* n_sp* h* nu; // [J]
float P_N= S_sp* (*Network).sim_BW; // [W]
float P_ASE= 2* P_N; // [W]
float OSigmaNoise= sqrt(P_ASE);
return OSigmaNoise;
}
float Dnoise (DeviceSTR *Network, float Pmean_Rxin, float OSigmaNoise) {
float q= 1.602E-19; // [A s]
float K_B= 1.381E-23; // [J/K]
float F_A= 5.5; // [1] exceess noise factor APD
float P_in= Pmean_Rxin;
float I_d= 1E-8; // [A] APD dark current
float B_e= 1E9* (*Network).Efilt_CutOff; // [Hz] effective noise bandwidth (assumed =) electrical filter cut-off frequency
// Shot noise - ASE power incorporated
float P_ASE= OSigmaNoise* OSigmaNoise;
float P_ASE_downstream= P_ASE* (*Network).FAtt2* (*Network).FAtt2;
float P_ASE_filtered= P_ASE_downstream* (2E9* (*Network).Ofilt_CutOff/ (*Network).sim_BW);
float sigma_shot_wASE2= 2* q* (*Network).M* (*Network).M* F_A* ((*Network).R* (P_in+ P_ASE_filtered )+ I_d )* B_e;
// printf("sigma_shot_wASE2[W]= %e\n", sigma_shot_wASE2); // TEST
// Thermal noise
float T= 298.17; // [K]
float R_L= 50; // [J/(s A^2)]
float sigma_thermal2= 4* K_B* T* B_e/R_L;
// printf("sigma_thermal2[W]= %e\n", sigma_thermal2); // TEST
float DSigmaNoise= sqrt(sigma_thermal2+ sigma_shot_wASE2);
return DSigmaNoise;
}
void GenRuidoRapido(float *Noise, float Sigma, unsigned long int Tmax) {
void Gasdev(float *V2, float Sig);
unsigned long int i;
static long int sem = -1; // Semilla para el generador de numeros random.
if(sem==-1) sem =-time(NULL);
for(i=0; i<Tmax; i+=2) Gasdev(&(Noise[i]), Sigma);
for(i=0; i<Tmax; i+=2){
Gasdev(&(Noise[i]), Sigma);
Noise[i]*= 2.0* ((float) rand()/ (float) RAND_MAX )- 1.0; // phase effect
}
}
void Gasdev(float *V2, float Sigma) {
float fac,rsq,v1,v2;
do {
// generador stdlib.h [-1,1]
v1= 2.0* ((float) rand()/ (float) RAND_MAX )- 1.0;
v2= 2.0* ((float) rand()/ (float) RAND_MAX )- 1.0;
rsq=v1*v1+v2*v2;
} while (rsq >= 1.0 || rsq == 0.0);
fac=Sigma*sqrt(-2.0*log(rsq)/rsq);
V2[0] = v2*fac;
V2[1] = v1*fac;
}
void Write1Col(char FileName[], float Train[], unsigned int TrainSize) {
unsigned long int i;
FILE *File;
File= fopen(FileName, "w");
for(i=0; i<TrainSize; i++) fprintf(File,"%3e\n", Train[i]);
fclose(File);
}
void Write2Col(char FileName[], float TrainTime[], float Train[], unsigned int TrainSize, int Erste, GENDRIVE *Carrier) {
char FileStatus[2];
FileStatus[0]='w';
FileStatus[1]='\0';
unsigned long int i;
FILE *File;
if (Erste !=0){
FileStatus[0]= 'a';
for (i= 0;i< TrainSize; i++) TrainTime[i]+= Erste* BUFFERMAX* (*Carrier).Bit_Slot;
}
File= fopen(FileName, FileStatus);
for(i=0; i<TrainSize; i++) fprintf(File,"%3e\t%3e\n", TrainTime[i], Train[i]);
fclose(File);
}
void TimeVectorGenerator(GENDRIVE *Carrier, unsigned long int TrainLength, float AuxTemp[], float PulsesTrainTime[]) {
unsigned long int i;
unsigned int k;
for(k= 0;k<TrainLength;k++) for(i= 0;i<(*Carrier).NPtos_Bit;i++) PulsesTrainTime[k*(*Carrier).NPtos_Bit+ i]= AuxTemp[i]+ (*Carrier).Bit_Slot* k; // copies time to following slots
// Write1Col("temp.dat",PulsesTrainTime,TrainLength* (*Carrier).NPtos_Bit);
}
void RZTrain(FLAGS *Banderas, float RZPulsesTrain[], GENDRIVE *Carrier, SuperGaussian *Gauss, float RZBit1Gauss[], unsigned char InBitString[], unsigned long int TrainLength, unsigned int transmitters) {
// RZ PULSES TRAIN (Amplitude)
unsigned long int i;
unsigned int senders, k= 0;
while(k<TrainLength) {
senders= InBitString[k];
for(i=0; i<(*Carrier).NPtos_Bit; i++) {
// Optical intensities addition
RZPulsesTrain[k*(*Carrier).NPtos_Bit+i]= RZBit1Gauss[i]+ 2* (*Gauss).A_0;
RZPulsesTrain[k*(*Carrier).NPtos_Bit+i]*= (float) senders* RZBit1Gauss[i];
RZPulsesTrain[k*(*Carrier).NPtos_Bit+i]+= (float) transmitters * (*Gauss).P_0;
RZPulsesTrain[k*(*Carrier).NPtos_Bit+i]= sqrt( RZPulsesTrain[k*(*Carrier).NPtos_Bit+i]);
}
k++;
}
// Write1Col("amplitude1.dat", RZBit1Gauss, (*Carrier).NPtos_Bit); // TEST bitslot '1'
if ((*Banderas).LinkVectors ) Write1Col("RZPulsesTrain.dat", RZPulsesTrain, (*Carrier).NPtos_Tot); // TEST train to file
// for(i=0; i<(*Carrier).NPtos_Tot; i++) printf("%.3e\t%.3e\n",RZPulsesTrainTime[i],RZPulsesTrain[i]); // TEST
}
void OpticalFilter(float SignalVector[], unsigned long int SignalVectorSize) {
/* Digital filter designed by mkfilter/mkshape/gencode A.J. Fisher
Command line: /www/usr/fisher/helpers/mkfilter -Bu -Lp -o 2 -a 1.5625000000e-02 0.0000000000e+00 -l
passtype = Lowpass
order = 6
samplerate = 6.4E11 = 2^6/ bit slot
*/
// FILTER Order= 6
// #define oNZEROS 6
// #define oNPOLES 6
// #define oGAIN 8.599958842e+07 // BUTTERWORTH CutOff= 6GHz
// #define oGAIN 8.599958842e+07 // BUTTERWORTH CutOff= 10GHz
// #define oGAIN 2.985320090e+07 // BUTTERWORTH CutOff= 12GHz
// #define oGAIN 3.419013222e+06 // BUTTERWORTH CutOff= 17.5GHz
// #define oGAIN 2.357704323e+07 // BUTTERWORTH CutOff= 12.5GHz
// #define oGAIN 1.775271324e+05 // BESSEL CutOff= 17.5GHz
// #define oGAIN 4.570794845e+05 // BUTTERWORTH CutOff= 25GHz
// FILTER ORDER 2
#define oNZEROS 2
#define oNPOLES 2
// #define oGAIN 2.889601535e+02 // BUTTERWORTH CutOff= 12.5GHz, 64 samples
#define oGAIN 7.145956096e+00 // BUTTERWORTH CutOff= 12.5GHz, 8 samples
static float xvo[oNZEROS+1], yvo[oNPOLES+1];
unsigned long int i;
// printf("xv(0)= %3e\txv(1)= %3e\t\n",xv[0], xv[1]); // TEST
for (i=0; i<SignalVectorSize; i++) {
/*
// 6 poles
xvo[0] = xvo[1]; xvo[1] = xvo[2]; xvo[2] = xvo[3]; xvo[3] = xvo[4]; xvo[4] = xvo[5]; xvo[5] = xvo[6];
xvo[6] = SignalVector[i]/ oGAIN;
yvo[0] = yvo[1]; yvo[1] = yvo[2]; yvo[2] = yvo[3]; yvo[3] = yvo[4]; yvo[4] = yvo[5]; yvo[5] = yvo[6];
yvo[6] = (xvo[0] + xvo[6]) + 6 * (xvo[1] + xvo[5]) + 15 * (xvo[2] + xvo[4]) + 20 * xvo[3]
// + ( -0.6841955724 * yvo[0]) + ( 4.3646808658 * yvo[1]) + (-11.6101420990 * yvo[2]) + ( 16.4837640270 * yvo[3]) + (-13.1748195840 * yvo[4]) + ( 5.6207116179 * yvo[5]); // BUTTERWORTH CutOff= 6GHz
// + ( -0.6841955724 * yvo[0]) + ( 4.3646808658 * yvo[1])+ (-11.6101420990 * yvo[2]) + ( 16.4837640270 * yvo[3])+ (-13.1748195840 * yvo[4]) + ( 5.6207116179 * yvo[5]); // BUTTERWORTH CutOff= 10Ghz
// + ( -0.6341207148 * yvo[0]) + ( 4.0933318918 * yvo[1])+ (-11.0212577670 * yvo[2]) + ( 15.8439404200 * yvo[3])+ (-12.8267655930 * yvo[4]) + ( 5.5448696188 * yvo[5]); // BUTTERWORTH CutOff= 12GHz
+ (-0.6221802648* yvo[0]) + (4.0280507862* yvo[1]) + (-10.8782825350* yvo[2]) + (15.6871268060* yvo[3]) + (-12.7406278990* yvo[4]) + (5.5259103928* yvo[5]); // BUTTERWORTH CutOff= 12.5GHz
// + ( -0.5143535878 * yvo[0]) + ( 3.4274712300 * yvo[1]) + ( -9.5371585039 * yvo[2]) + ( 14.1860709290 * yvo[3]) + (-11.8984008380 * yvo[4]) + ( 5.3363520514 * yvo[5]); // BUTTERWORTH CutOff= 17.5GHz
// + (-0.2634656628* yvo[0])+ (1.9408892973* yvo[1])+ (-5.9948938374* yvo[2])+ (9.9414861026* yvo[3])+ (-9.3395818843* yvo[4])+ (4.7152054763* yvo[5]); // BESSEL CutOff= 17.5GHz
// + (-0.3862279890* yvo[0])+ ( 2.6834487459* yvo[1])+ (-7.8013262392* yvo[2])+ (12.1514352550* yvo[3])+ (-10.6996337410* yvo[4])+ (5.0521639483* yvo[5]); // BUTTERWORTH CutOff= 25GHz
SignalVector[i]= yvo[6];
*/
// 2 poles
xvo[0] = xvo[1]; xvo[1] = xvo[2];
xvo[2] = SignalVector[i] / oGAIN;
yvo[0] = yvo[1]; yvo[1] = yvo[2];
yvo[2] = (xvo[0]+ xvo[2] )+ 2* xvo[1]
+ ( -0.2594951757 * yvo[0]) + ( 0.6997380283 * yvo[1]); // BUTTERWORTH CutOff= 12.5GHz, 8 samples
// +(-0.8406758501 * yvo[0] )+ (1.8268331110* yvo[1] ); // BUTTERWORTH CutOff= 12.5GHz, 64 samples
SignalVector[i] = yvo[2];
}
}
void ElectricalFilter(float SignalVector[], unsigned long int SignalVectorSize, int *SamplingPoint, DeviceSTR *Network) {
/* Digital filter designed by mkfilter/mkshape/gencode A.J. Fisher
Command line: /www/usr/fisher/helpers/mkfilter -Bu -Lp -o 2 -a 1.5625000000e-02 0.0000000000e+00 -l
filtertype = Butterworth
passtype = Lowpass
order = 2
*/
/*
// FILTER ORDER 6 - sample rate 6.4E11
// #define NZEROSe 6
// #define NPOLESe 6
// CutOff= 6GHz order 6
// #define eGAIN 8.599958842e+07
// *SamplingPoint= 3; // 6GHz ord 6 filtro electrico
// CutOff= 10GHz order 6
// #define eGAIN 8.599958842e+07
// *SamplingPoint= 4; // 10GHz ord 6 filtro electrico
// CutOff= 12GHz order 6
// #define eGAIN 2.985320090e+07
// *SamplingPoint= 4; // 12GHz ord 6 filtro electrico
// CutOff= 25GHz order 6
// #define eGAIN 4.570794845e+05
// *SamplingPoint= 4; // 25GHz ord 6 filtro electrico
*/
// FILTER ORDER 2
#define NZEROSe 2
#define NPOLESe 2
float eGAIN;
switch ((*Network).Efilt_CutOff ) {
case 7:
// eGAIN= 8.884369142e+02; // CutOff= 7 GHz / Sample rate 6.4E11
eGAIN= 1.858664231e+01; // CutOff= 7 GHz / Sample rate 8E10
*SamplingPoint= 6; // opt: 17.5 ord 6 / elec: 7 ord 2 / Sample rate 8E10
//*SamplingPoint= 48; // opt: 17.5 ord 6 / elec: 7 ord 2 / Sample rate 6.4E11
break;
case 14:
eGAIN= 2.326204969e+02; // CutOff= 14 GHz / Sample rate 6.4E11
*SamplingPoint= 40; // opt: 12.5 ord 2 / elec: 14 ord 2 / Sample rate 6.4E11
// *SamplingPoint= 61; // opt: 12.5 ord 6 / elec: 14 ord 2
break;
default:
eGAIN= 2.326204969e+02; // CutOff= 14 GHz / Sample rate 6.4E11
*SamplingPoint= 40; // opt: 12.5 ord 2 / elec: 14 ord 2 / Sample rate 6.4E11
// *SamplingPoint= 61; // opt: 12.5 ord 6 / elec: 14 ord 2
/*
// Con filtro optico 25 GHz corner, orden 6
case 25:
eGAIN= 7.820233128e+01; // CutOff= 25GHz
*SamplingPoint= 27; // 25GHz ord 2 filtro electrico / optico
break;
case 12:
eGAIN= 3.125167034e+02; // CutOff= 12GHz
*SamplingPoint= 35; // 12GHz ord 2 filtro electrico / optico
break;
case 10:
eGAIN= 4.441320406e+02; // CutOff= 10GHz
*SamplingPoint= 37; // 10GHz ord 2 filtro electrico / optico
break;
case 6:
eGAIN= 4.441320406e+02; // CutOff= 6GHz
*SamplingPoint= 45; // 6GHz ord 2 filtro electrico / optico
break;
// case 5: eGAIN= 4.441320406e+02; // CutOff= 5GHz
// break;
*/
}
// printf("eGAIN= %e\n",eGAIN); // TEST
static float xve[NZEROSe+1], yve[NPOLESe+1];
unsigned long int i;
for (i=0; i<SignalVectorSize; i++) {
// 2 poles
xve[0] = xve[1]; xve[1] = xve[2];
xve[2] = SignalVector[i] / eGAIN;
yve[0] = yve[1]; yve[1] = yve[2];
yve[2] = (xve[0] + xve[2]) + 2 * xve[1]+
// Con filtro optico 17.5 GHz corner, orden 6
// ( -0.8233495955 * yve[0]) + ( 1.8061542062 * yve[1]); // opt: 17.5 ord 6 / elec: 14 ord 2 / Sample rate 6.4E11
// ( -0.9073853925 * yve[0]) + ( 1.9028831033 * yve[1]); // opt: 17.5 ord 6 / elec: 7 ord 2 / Sample rate 6.4E11
+ ( -0.4604272288 * yve[0]) + ( 1.2452189124 * yve[1]); // opt= 12.5 ord 2 / elec= 7 ord 2 /sample rate= 8E10
// Con filtro optico 25 GHz corner, orden 6
// ( -0.8703674775 * yve[0]) + ( 1.8613611468 * yve[1]); // CutOff= 10GHz
// ( -0.9329347318 * yve[0]) + ( 1.9306064272 * yve[1]); // CutOff= 5GHz
// ( -0.9200713754 * yve[0]) + ( 1.9167412232 * yve[1]); // CutOff= 6GHz
// ( -0.8465319748 * yve[0]) + ( 1.8337326589 * yve[1]); // CutOff= 12GHz
// ( -0.7067570632 * yve[0]) + ( 1.6556076929 * yve[1]); // CutOff= 25GHz
SignalVector[i] = yve[2];
/*
// 6 poles
xve[0] = xve[1]; xve[1] = xve[2]; xve[2] = xve[3]; xve[3] = xve[4]; xve[4] = xve[5]; xve[5] = xve[6];
xve[6] = SignalVector[i]/ eGAIN;
yve[0] = yve[1]; yve[1] = yve[2]; yve[2] = yve[3]; yve[3] = yve[4]; yve[4] = yve[5]; yve[5] = yve[6];
yve[6] = (xve[0] + xve[6]) + 6 * (xve[1] + xve[5]) + 15 * (xve[2] + xve[4]) + 20 * xve[3]
// + ( -0.6841955724 * yve[0]) + ( 4.3646808658 * yve[1]) + (-11.6101420990 * yve[2]) + ( 16.4837640270 * yve[3]) + (-13.1748195840 * yve[4]) + ( 5.6207116179 * yve[5]); // CutOff= 6GHz
// + ( -0.6841955724 * yve[0]) + ( 4.3646808658 * yve[1])+ (-11.6101420990 * yve[2]) + ( 16.4837640270 * yve[3])+ (-13.1748195840 * yve[4]) + ( 5.6207116179 * yve[5]); // CutOff= 10GHz
// + ( -0.6341207148 * yve[0]) + ( 4.0933318918 * yve[1])+ (-11.0212577670 * yve[2]) + ( 15.8439404200 * yve[3])+ (-12.8267655930 * yve[4]) + ( 5.5448696188 * yve[5]); // CutOff= 12GHz
+ ( -0.3862279890 * yve[0]) + ( 2.6834487459 * yve[1])+ ( -7.8013262392 * yve[2]) + ( 12.1514352550 * yve[3])+ (-10.6996337410 * yve[4]) + ( 5.0521639483 * yve[5]); // CutOff= 25GHz
SignalVector[i]= yve[6];
*/
}
}
void RandIntString(unsigned char ThrStr[], int NPulThr){
unsigned long int i;
srand ( time(NULL) );
for(i= 0; i< NPulThr; i++){
if ( (rand()/(RAND_MAX/2))==1) ThrStr[i]= 1;
else ThrStr[i]= 0;
}
}
float Threshold3(GENDRIVE *Carrier, float RZBit1Gauss[], float *OSigmaNoise, float *DSigmaNoise, DeviceSTR *Network, unsigned int transmitters, SuperGaussian *Gauss) { // TEST Ith comment
// float Threshold3(GENDRIVE *Carrier, float RZBit1Gauss[], float *OSigmaNoise, float *DSigmaNoise, DeviceSTR *Network, unsigned int transmitters, SuperGaussian *Gauss, float IthFrac) { // TEST Ith uncomment
unsigned long int i;
unsigned short int Pul, NPulThr= 5000; // averaged bits to obtain threshold
float One[(*Carrier).NPtos_Bit], Zero[(*Carrier).NPtos_Bit];
/*
// Optical & Electric IRR filters dummy start
float One[(*Carrier).NPtos_Bit], Zero[(*Carrier).NPtos_Bit];
float DummyAux= sqrt( (float) transmitters )* (*Gauss).A_0* (*Network).FAtt1* (*Network).EDFAgain* (*Network).FAtt2;
for(i=0; i<(*Carrier).NPtos_Bit; i++) Zero[i]= DummyAux;
OpticalFilter(Zero, (*Carrier).NPtos_Bit);
DummyAux*= DummyAux; // Optical: Amplitude -> Power
DummyAux*= (*Network).M* (*Network).R; // Optical Power -> Electrical Current
for(i=0; i<(*Carrier).NPtos_Bit; i++) Zero[i]= DummyAux;
int SP;
ElectricalFilter(Zero, (*Carrier).NPtos_Bit, &SP, Network);
*/
// OPTICAL NOISE VECTOR FOR THRESHOLD DETERMINATION BITS
float ONoiseVector[(*Carrier).NPtos_Bit* NPulThr];
GenRuidoRapido(ONoiseVector, *OSigmaNoise, (*Carrier).NPtos_Bit* NPulThr); // NoiseVector amplitude
// Write1Col("ONoiseVector.dat", ONoiseVector, 2*(*Carrier).NPtos_Bit* NPulThr); // TEST train to file
// printf("nombre= %i\n",2*(*Carrier).NPtos_Bit* NPulThr); // TEST
// DETECTOR (THERMAL) NOISE VECTOR FOR THRESHOLD DETERMINATION BITS
float DNoiseVector[(*Carrier).NPtos_Bit* NPulThr];
GenRuidoRapido(DNoiseVector, *DSigmaNoise, (*Carrier).NPtos_Bit* NPulThr); // NoiseVector amplitude
// Write1Col("DNoiseVector.dat", DNoiseVector2, 2*(*Carrier).NPtos_Bit* NPulThr); // TEST train to file
// DETERMINATION BITS: CREATION, ATTENUATION Tx -> EDFA
float AuxZero= sqrt( (float) transmitters )* (*Gauss).A_0;
float AuxOne= (float) transmitters* (*Gauss).P_0;
for(i=0; i<(*Carrier).NPtos_Bit; i++) {
Zero[i]= AuxZero; // zero level for present transmitters
One[i]= 2* (*Gauss).A_0 + RZBit1Gauss[i]; // one overpulse addition
One[i]*= RZBit1Gauss[i];
One[i]+= AuxOne;
One[i]= sqrt(One[i] );
// printf("One[%li]= %e\n",i,One[i]); // TEST
One[i]*= (*Network).FAtt1, Zero[i]*= (*Network).FAtt1; // ATTENUATION STAGE Tx -> EDFA out
One[i]*= (*Network).EDFAgain, Zero[i]*= (*Network).EDFAgain; // EDFA STAGE EDFAin -> EDFAout
}
// Random input bit string
unsigned N0=0, N1=0;
unsigned char RanStr[NPulThr];
RandIntString(RanStr, NPulThr);
// Super pulses string
float SuperStr[(*Carrier).NPtos_Bit* NPulThr];
for(Pul= 0; Pul< NPulThr; Pul++) {
if (RanStr[Pul]==0) {
N0++;
for(i=0; i<(*Carrier).NPtos_Bit; i++) SuperStr[i+ Pul* (*Carrier).NPtos_Bit]= Zero[i];
}
else {
N1++;
for(i=0; i<(*Carrier).NPtos_Bit; i++) SuperStr[i+ Pul* (*Carrier).NPtos_Bit]= One[i];
}
}
// Write1Col("SuperStr.dat",SuperStr,(*Carrier).NPtos_Bit* NPulThr);
// Optical noise addition
for(i=0; i<(*Carrier).NPtos_Bit* NPulThr; i++) SuperStr[i]+= ONoiseVector[i];
// Attenuation EDFA -> Rx
for(i=0; i<(*Carrier).NPtos_Bit* NPulThr; i++) SuperStr[i]*= (*Network).FAtt2;
// Optical filtering
OpticalFilter(SuperStr, (*Carrier).NPtos_Bit* NPulThr);
// -> CURRENT + ELECTRICAL NOISE
for(i=0; i<(*Carrier).NPtos_Bit* NPulThr; i++) {
SuperStr[i]*= SuperStr[i]; // optical amplitude -> optical power
SuperStr[i]*= (*Network).M* (*Network).R; // -> electrical current
SuperStr[i]+= DNoiseVector[i]; // electrical noise addition
}
// Electrical filtering
int SP;
ElectricalFilter(SuperStr, (*Carrier).NPtos_Bit* NPulThr, &SP, Network);
// Write1Col("SuperStr.dat",SuperStr,(*Carrier).NPtos_Bit* NPulThr);
// EYE DIAGRAM REQUIRED TO SELECT MIN & MAX
// unsigned int (*Network).Range= 2; // even numbers -> effective range SP +- SP/2
(*Network).Min= SP- (*Network).Range/2;
(*Network).Range++; // for correct sampling size
// printf("%i\n",SP); // TEST
/*
// Manual decision current
float I0m= AuxZero* (*Network).FAtt1* (*Network).EDFAgain * (*Network).FAtt2;
I0m*= I0m; // -> electrical current
float I1m= sqrt((2* (*Gauss).A_0 + (*Gauss).A_peak )* (*Gauss).A_peak+ AuxOne)* (*Network).FAtt1* (*Network).EDFAgain * (*Network).FAtt2;
I1m*= I1m; // -> electrical current
printf("I0m= %e\t I1m= %e\n",I0m, I1m); // TEST
float Idm= I0m+ (I1m- I0m)* IthFrac;
*/
/*
// with manual current threshold guess
float Samp0[NPulThr], Samp1[NPulThr], AuxSum;
unsigned int pos0= 0, pos1=0 ;
for(Pul= 0; Pul< NPulThr; Pul++) {
AuxSum= 0;
for(i= 0; i< Range; i++) {
AuxSum+= SuperStr[Min+ i+ Pul* (*Carrier).NPtos_Bit];
}
AuxSum/= (float) Range;
if (AuxSum> IthFrac) {
Samp1[pos1]= AuxSum;
pos1++;
}
else {
Samp0[pos0]= AuxSum;
pos0++;
}
}
N0= pos0, N1= pos1;
*/
//with string previous knowledge
// Sampling (mean at each bit slot) with string previous knowledge
float Samp0[N0], Samp1[N1], AuxSum;
unsigned int pos0= 0, pos1=0 ;
for(Pul= 0; Pul< NPulThr; Pul++) {
AuxSum= 0;
for(i= 0; i< (*Network).Range; i++) {
AuxSum+= SuperStr[(*Network).Min+ i+ Pul* (*Carrier).NPtos_Bit];
// printf("%i\t %li\t %li \t %e\n",RanStr[Pul], i, Min+ i+ Pul* (*Carrier).NPtos_Bit, SuperStr[Min+ i+ Pul* (*Carrier).NPtos_Bit]); // TEST
}
if (RanStr[Pul]==0) {
Samp0[pos0]= AuxSum/ (float) (*Network).Range;
// printf("0m %e\n",Samp0[pos0]); // TEST
pos0++;
}
else {
Samp1[pos1]= AuxSum/ (float) (*Network).Range;
// printf("1m %e\n",Samp1[pos1]); // TEST
pos1++;
}
}
// Write1Col("Super.dat", SuperStr, NPulThr* (*Carrier).NPtos_Bit); // TEST train to file
// Write1Col("Samp0.dat", Samp0, N0); // TEST train to file
// Write1Col("Samp1.dat", Samp1, N1); // TEST train to file
// Bit 0 statistics
float sum0= 0, sum_sqr0= 0;
for(i=0; i< N0; i++) {
sum0+= Samp0[i];
Samp0[i]*= Samp0[i];
sum_sqr0+= Samp0[i];
}
float I0= sum0/ (float) N0; // moyenne 0
float sigma0= sqrt(( 1/ ((float) N0 - 1 ) )* (sum_sqr0- ((sum0* sum0 )/ (float) N0 ) ) );
// printf("I0= %e\t sigma0= %e\n",I0, sigma0); // TEST
// Bit 1 statistics
float sum1= 0, sum_sqr1= 0;
for(i=0; i< N1; i++) {
sum1+= Samp1[i];
Samp1[i]*= Samp1[i];
sum_sqr1+= Samp1[i];
}
float I1= sum1/ (float) N1; // moyenne 1
float sigma1= sqrt(( 1/ ((float) N1 - 1 ) )* (sum_sqr1- ((sum1* sum1 )/ (float) N1 ) ) );
// printf("I1= %e\t sigma1= %e\n",I1, sigma1); // TEST
/* // Sampling (individual samples)
float Samp0[Range* N0], Samp1[Range* N1];
unsigned int pos0= 0, pos1=0 ;
for(Pul= 0; Pul< NPulThr; Pul++) {
if (RanStr[Pul]==0) {
for(i= pos0; i< pos0+ Range; i++) {
Samp0[i]= SuperStr[Min+ (i- pos0)+ Pul* (*Carrier).NPtos_Bit];
// printf("0:%li\t %li\n",i, Min+ (i- pos0)+ Pul* (*Carrier).NPtos_Bit); // TEST
}
pos0+= Range;
}
else {
for(i= pos1; i< pos1+ Range; i++) {
Samp1[i]= SuperStr[Min+ (i- pos1)+ Pul* (*Carrier).NPtos_Bit];
// printf("1: %li\t %li\n",i ,Min+ (i- pos1)+ Pul* (*Carrier).NPtos_Bit); // TEST
}
pos1+= Range;
}
}
// printf("N0= %i\tN1= %i\n", N0, N1);
// Write1Col("Samp0.dat", Samp0, Range* N0); // TEST train to file
// Write1Col("Samp1.dat", Samp1, Range* N1); // TEST train to file
// Bit 0 statistics
float sum0= 0, sum_sqr0= 0;
for(i=0; i< Range* N0; i++) {
sum0+= Samp0[i];
Samp0[i]*= Samp0[i];
sum_sqr0+= Samp0[i];
}
float n0= Range* N0;
float I0= sum0/n0; // moyenne 0
float sigma0= sqrt(( 1/ (n0 - 1 ) )* (sum_sqr0- ((sum0* sum0 )/n0 ) ) );
// printf("sigma0= %e\n",sigma0); // TEST
// Bit 1 statistics
float sum1= 0, sum_sqr1= 0;
for(i=0; i<Range* N1; i++) {
sum1+= Samp1[i];
Samp1[i]*= Samp1[i];
sum_sqr1+= Samp1[i];
}
float n1= Range* N1;
float I1= sum1/n1; // moyenne 1
float sigma1= sqrt(( 1/ (n1 - 1 ) )* (sum_sqr1- ((sum1* sum1 )/n1 ) ) );
*/
// printf("%e\n",(I1- I0)/ (sigma0+ sigma1)); // TEST QBER
// Threshold calculation
float Id= (sigma0* I1+ sigma1* I0)/ (sigma0+ sigma1); // TEST Ith comment
// float Id= I0+ (I1- I0 )* IthFrac; // TEST Ith uncomment
// printf("IthFrac= %e\n",IthFrac); // TEST Ith
// printf("Id= %e\n",Id); // TEST QBER
return Id;
}
float BitSlots(FLAGS *Banderas, GENDRIVE *Carrier, SuperGaussian *Gauss, DeviceSTR *Network, float OSNR, float *OSigmaNoise, float DSNR, float *DSigmaNoise, unsigned int transmitters, float RZBit1Gauss[], float AuxTemp[]) { // TEST Ith comment
// float BitSlots(GENDRIVE *Carrier, SuperGaussian *Gauss, DeviceSTR *Network, float OSNR, float *OSigmaNoise, float DSNR, float *DSigmaNoise, unsigned int transmitters, float RZBit1Gauss[], float AuxTemp[], float IthFrac) { // TEST Ith uncomment
unsigned long int i;
// Petit AuxTemp
for(i=0; i<(*Carrier).NPtos_Bit; i++) AuxTemp[i]= (*Carrier).dt* ( i+ 0.5) ; // time for one slot
// Pulse amplitude addition over base [RZ]
float AuxAmp= (*Gauss).A_peak- (*Gauss).A_0;
for(i=0; i<(*Carrier).NPtos_Bit; i++) {
RZBit1Gauss[i]= AuxAmp;
RZBit1Gauss[i]*= exp(-0.5* pow( ( ( AuxTemp[i]- ( (*Gauss).CentringFactor* (*Carrier).Bit_Slot))/ (*Gauss).T_0_amp), 2* (*Gauss).m)); // SuperGaussian overpulse
// printf("RZ1[%li]= %e\n",i,RZBit1Gauss[i]); // TEST
}
/*
// Pulse amplitude addition over base [NRZ]
for(i=0; i<(*Carrier).NPtos_Bit; i++) RZBit1Gauss[i]= ( (*Gauss).A_peak- (*Gauss).A_0); // Square [NRZ]
// for(i=0; i<(*Carrier).NPtos_Bit; i++) printf("RZ1[%li]= %e\n",i,RZBit1Gauss[i]); // TEST
*/
/*
// Bit slots test
float RZBit0[(*Carrier).NPtos_Bit]; // '0' SLOT AMPLITUDE
float RZBit1[(*Carrier).NPtos_Bit]; // '1' SLOT AMPLITUDE [NRZ]
for(i=0; i<(*Carrier).NPtos_Bit; i++) {
RZBit0[i]= (*Gauss).P_0;
RZBit1[i]= (*Gauss).A_0+ RZBit1Gauss[i];
RZBit1[i]*= RZBit1[i];
}
Write2Col("Bit01.dat", RZBit0, RZBit1, (*Carrier).NPtos_Bit,0, Carrier); // TEST one & zero to file
*/
// PmeanVector
float PmeanVector[2* (*Carrier).NPtos_Bit]; // PmeanVector
float auxVector1, auxVector0= transmitters* (*Gauss).P_0;
float Pmean_sum;
for(i=0, Pmean_sum= 0; i<(*Carrier).NPtos_Bit; i++) {
auxVector1= RZBit1Gauss[i]+ 2* (*Gauss).A_0;
auxVector1*= RZBit1Gauss[i];
PmeanVector[i]= auxVector1+ auxVector0;
PmeanVector[i+ (*Carrier).NPtos_Bit]= auxVector0;
Pmean_sum+= PmeanVector[i]+ PmeanVector[i+ (*Carrier).NPtos_Bit];
}
Pmean_sum*= 1.0/ (2.0* (*Carrier).NPtos_Bit );
if ((*Banderas).Pmeans ) printf("Pmean_transmitter[W]= %3e\n",Pmean_sum); // TEST PMEAN
// ATTENUATION STAGE Tx -> EDFAout
float aux_Att= (*Network).FAtt1* (*Network).EDFAgain;
aux_Att*= aux_Att;
for(i=0, Pmean_sum= 0; i<2* (*Carrier).NPtos_Bit; i++) {
PmeanVector[i]*= aux_Att;
Pmean_sum+= PmeanVector[i];
}
float Pmean_EDFAout= Pmean_sum/ (2.0* (*Carrier).NPtos_Bit );
if ((*Banderas).Pmeans ) printf("Pmean_EDFAout= %3e\n",Pmean_EDFAout); // TEST PMEAN
// ONoise calculation
if (OSNR==0) *OSigmaNoise= Onoise(Network);
else *OSigmaNoise= sqrt((Pmean_EDFAout/ OSNR)*((*Network).sim_BW/(*Network).r_BW ) ); // optical noise amplitude simulation bandwidth [ TIA/EIA-526-19 ]
// *OSigmaNoise= sqrt( (Pmean_EDFAout/ OSNR)*( 2* (*Network).Ofilt_CutOff/ (*Network).r_BW ) ); // optical noise amplitude optical filter bandwidth
if ((*Banderas).Pmeans ) printf("OSigmaNoise^2= %3e\n", *OSigmaNoise* *OSigmaNoise); // TEST
if ((*Banderas).Pmeans ) printf("OSNR[dB, 0.1nm]= %3e\n", 10* log10((Pmean_EDFAout/ (*OSigmaNoise* *OSigmaNoise) )* ( 1/((*Network).r_BW* (*Carrier).dt ) ) ) ); // TEST
// printf("1/dt= %3e\n", 1/(*Carrier).dt); // TEST
// Optical & Electric IRR filters dummy start
float Zero[(*Carrier).NPtos_Bit];
float DummyAux= sqrt( (float) transmitters )* (*Gauss).A_0* (*Network).FAtt1* (*Network).EDFAgain* (*Network).FAtt2;
for(i=0; i<(*Carrier).NPtos_Bit; i++) Zero[i]= DummyAux;
OpticalFilter(Zero, (*Carrier).NPtos_Bit);
DummyAux*= DummyAux; // Optical: Amplitude -> Power
DummyAux*= (*Network).M* (*Network).R; // Optical Power -> Electrical Current
for(i=0; i<(*Carrier).NPtos_Bit; i++) Zero[i]= DummyAux;
int SP;
ElectricalFilter(Zero, (*Carrier).NPtos_Bit, &SP, Network);
// Optical noise addition
for(i=0, Pmean_sum= 0; i<2* (*Carrier).NPtos_Bit; i++) PmeanVector[i]= sqrt(PmeanVector[i] ); // power -> amplitude
float ONoiseVector[2* (*Carrier).NPtos_Bit];
GenRuidoRapido(ONoiseVector, *OSigmaNoise, 2* (*Carrier).NPtos_Bit); // NoiseVector amplitude
for(i=0; i< 2* (*Carrier).NPtos_Bit; i++) PmeanVector[i]+= ONoiseVector[i];
// ATTENUATION STAGE EDFAout -> Rxin
for(i=0, Pmean_sum= 0; i<2* (*Carrier).NPtos_Bit; i++) {
PmeanVector[i]*= (*Network).FAtt2;
Pmean_sum+= PmeanVector[i]* PmeanVector[i];
}
float Pmean_Rxin2= Pmean_sum/ (2.0* (*Carrier).NPtos_Bit );
if ((*Banderas).Pmeans ) printf("Pmean_Rxin2= %3e\n",Pmean_Rxin2); // TEST PMEAN
// Optical filter at Rx input
OpticalFilter(PmeanVector, 2* (*Carrier).NPtos_Bit);
// Pmean post optical filter
for(i=0, Pmean_sum= 0; i<2* (*Carrier).NPtos_Bit; i++) {
PmeanVector[i]*= PmeanVector[i];
Pmean_sum+= PmeanVector[i];
}
float Pmean_Rxin= Pmean_sum/ (2.0* (*Carrier).NPtos_Bit );
if ((*Banderas).Pmeans ) printf("Pmean_Rxin= %3e\n",Pmean_Rxin); // TEST PMEAN
// DSigmaNoise
if (DSNR==0) *DSigmaNoise= Dnoise(Network, Pmean_Rxin, *OSigmaNoise);
else *DSigmaNoise= Pmean_Rxin* (*Network).M* (*Network).R* sqrt(1/ DSNR); // amplitude of noise (Agrawal 4.4.11) [Santiago I.]
// printf("DSigmaNoise= %3e\n", *DSigmaNoise); // TEST
if ((*Banderas).Pmeans ) printf("DSigmaNoise^2= %3e\n", *DSigmaNoise* *DSigmaNoise); // TEST
if ((*Banderas).Pmeans ) printf("DSNR[dB]= %3e\n", 10* log10((Pmean_Rxin* (*Network).M* (*Network).R)* (Pmean_Rxin* (*Network).M* (*Network).R)/ (*DSigmaNoise* *DSigmaNoise ) ) ); // TEST
if ((*Banderas).Pmeans ) printf("Pmean_photocurrent= %3e\n",Pmean_Rxin* Pmean_Rxin* (*Network).M* (*Network).M* (*Network).R* (*Network).R); // TEST
// DETECTOR THRESHOLD
float Id= Threshold3(Carrier, RZBit1Gauss, OSigmaNoise, DSigmaNoise, Network, transmitters, Gauss); // TEST Ith comment
// float Id= Threshold3(Carrier, RZBit1Gauss, OSigmaNoise, DSigmaNoise, Network, transmitters, Gauss, IthFrac); // TEST Ith uncomment
return Id;
}
void EyeDiagram(float PulsesTrain[], float PulsesTrainTime[], GENDRIVE *Carrier, float Id) {
unsigned long int i, iMidi= 0.5*(*Carrier).NPtos_Bit;
FILE *EYE;
EYE= fopen("EyeDiagram.dat", "w");
fprintf(EYE,"# Id= %3e\n",Id);
for(i=0; i<(*Carrier).NPtos_Tot; i++) {
ldiv_t thing= ldiv(i,(*Carrier).NPtos_Bit);
if(thing.rem< iMidi) {
fprintf(EYE,"%3e\t%3e\t%3e\n",PulsesTrainTime[thing.rem], PulsesTrain[i], Id);
fprintf(EYE,"%3e\t%3e\t%3e\n",PulsesTrainTime[thing.rem]+ (*Carrier).Bit_Slot, PulsesTrain[i], Id);
// fprintf(EYE,"%3e\t%3e\n",PulsesTrainTime[thing.rem], PulsesTrain[i]);
//fprintf(EYE,"%3e\t%3e\n",PulsesTrainTime[thing.rem]+ (*Carrier).Bit_Slot, PulsesTrain[i]);
}
else {
fprintf(EYE,"%3e\t%3e\t%3e\n",PulsesTrainTime[thing.rem], PulsesTrain[i], Id);
fprintf(EYE,"%3e\t%3e\t%3e\n",PulsesTrainTime[thing.rem]- (*Carrier).Bit_Slot, PulsesTrain[i], Id);
// fprintf(EYE,"%3e\t%3e\n",PulsesTrainTime[thing.rem], PulsesTrain[i]);
// fprintf(EYE,"%3e\t%3e\n",PulsesTrainTime[thing.rem]- (*Carrier).Bit_Slot, PulsesTrain[i]);
}
}
fclose(EYE);
}
void Link(FLAGS *Banderas, GENDRIVE *Carrier, float RZPulsesTrain[], float *OSigmaNoise, float *DSigmaNoise, DeviceSTR *Network, int *SamplingPoint, float AuxTemp[]) {
unsigned long int i;
for(i=0; i<(*Carrier).NPtos_Tot; i++) RZPulsesTrain[i]*= (*Network).FAtt1; // ATTENUATION STAGE Tx -> EDFAin
// Write1Col("AtEDFAin.dat", RZPulsesTrain, (*Carrier).NPtos_Tot); // TEST train to file
/*
SigmaNoise: [V/m*10-3] width of amplitude Gaussian distribution A(t) related to mean noise power as follows:
white noise autocorrelation = \sigma^2 * delta(t) [http://en.wikipedia.org/wiki/White_noise]
Wiener-Khinchin: \phi(\omega) [Power Spectral Density]= Fourier(white noise autocorrelation ) [http://en.wikipedia.org/wiki/Wiener�Khinchin_theorem]
-> \phi(\omega)= \sigma^2 * Fourier(\delta(t))
P [Power]= \int d\omega \phi(\omega) [http://en.wikipedia.org/wiki/Spectral_density]
-> P= \sigma^2 * Fourier(\delta(t))
Gaussian: Fourier(\delta)=\frac{1}{\sqrt(2*\pi)}
-> P =\sigma^2
SigmaNoise is calculated from SNR assuming the following:
SNR= Power_signal/Power_noise [http://en.wikipedia.org/wiki/Signal-to-noise_ratio]
Power_noise= SigmaNoise^2
Power_signal= 0.5*(Power_'0bit' + Power_'1bit') assuming equal number of '1' and '0' bits [Andres, Nacho]
Power_'0bit'= LOff^2, amplitude for bit '0' due to system extinction ratio
Power_'1bit'= P1Mean= \frac{1}{(*Carrier).Bit_Slot} \int_0^{(*Carrier).Bit_Slot} dt Pulse1(t)^2 integrated in bit slot
OR? Power_'1bit'= \frac{1}{LimSup-LimInf} \int_LimInf^{LimSup} dt Pulse1(t)^2 integrated in detection window
-> SigmaNoise=\sqrt(\frac{LOff^2 + P1Mean}{2 SNR})
*/
for(i=0; i<(*Carrier).NPtos_Tot; i++) RZPulsesTrain[i]*= (*Network).EDFAgain; // EDFA STAGE EDFAin -> EDFAout
if ((*Banderas).LinkVectors ) Write1Col("AtEDFAoutWON.dat", RZPulsesTrain, (*Carrier).NPtos_Tot); // TEST train to file
// Optical noise addition (AWGN)
float ONoiseVector[(*Carrier).NPtos_Tot];
GenRuidoRapido(ONoiseVector, *OSigmaNoise, (*Carrier).NPtos_Tot); // NoiseVector amplitude
if ((*Banderas).LinkVectors ) Write1Col("ONoiseVector.dat", ONoiseVector, (*Carrier).NPtos_Tot); // TEST train to file
for(i=0; i<(*Carrier).NPtos_Tot; i++) RZPulsesTrain[i]+= ONoiseVector[i]; // Noise addition
if ((*Banderas).LinkVectors ) Write1Col("AtEDFAout.dat", RZPulsesTrain, (*Carrier).NPtos_Tot); // TEST train to file
/* // Photodetected ASE noise TEST
float ONoiseVector2[(*Carrier).NPtos_Bit];
for(i=0; i<(*Carrier).NPtos_Bit; i++) {
ONoiseVector2[i]= ONoiseVector[i];
// ONoiseVector2[i]*= (*Network).FAtt2; // downstream attenuation
}
// OpticalFilter(ONoiseVector2, (*Carrier).NPtos_Bit);
float PD_ASE=0;
for(i=0; i<(*Carrier).NPtos_Bit; i++) {
ONoiseVector2[i]*= ONoiseVector2[i];
PD_ASE+= ONoiseVector2[i];
}
printf("PD_ASE[W]= %e3\n",PD_ASE);
*/
/* // EDFA output check
float RZPulsesTrainTime[(*Carrier).NPtos_Tot]; // Time vector
TimeVectorGenerator(Carrier, (*Carrier).N_Bits, AuxTemp, RZPulsesTrainTime);
float Id=0;
EyeDiagram(RZPulsesTrain, RZPulsesTrainTime, Carrier, Id); // TEST Eye diagram
*/
// Attenuation EDFA -> Rx
for(i=0; i<(*Carrier).NPtos_Tot; i++) RZPulsesTrain[i]*= (*Network).FAtt2; // ATTENUATION STAGE EDFAout -> Rx
// Optical filtering
OpticalFilter(RZPulsesTrain, (*Carrier).NPtos_Tot);
if ((*Banderas).LinkVectors ) Write1Col("OptFilt.dat", RZPulsesTrain, (*Carrier).NPtos_Tot); // TEST train to file
/* // Optical filter output check
float RZPulsesTrainTime[(*Carrier).NPtos_Tot]; // Time vector
TimeVectorGenerator(Carrier, (*Carrier).N_Bits, AuxTemp, RZPulsesTrainTime);
float Id=0;
EyeDiagram(RZPulsesTrain, RZPulsesTrainTime, Carrier, Id); // TEST Eye diagram
*/
// Optical -> Electrical signal (current)
for(i=0; i<(*Carrier).NPtos_Tot; i++) {
RZPulsesTrain[i]*= RZPulsesTrain[i]; // optical amplitude-> optical power
RZPulsesTrain[i]*= (*Network).M* (*Network).R; // -> electrical current
}
if ((*Banderas).LinkVectors ) Write1Col("PhotodetectedI.dat", RZPulsesTrain, (*Carrier).NPtos_Tot); // TEST train to file
// Detector electrical noise
float DNoiseVector[(*Carrier).NPtos_Tot]; // Thermal noise vector
GenRuidoRapido(DNoiseVector, *DSigmaNoise, (*Carrier).NPtos_Tot); // NoiseVector amplitude
for(i=0; i<(*Carrier).NPtos_Tot; i++) RZPulsesTrain[i]+= DNoiseVector[i]; // Noise addition to electrical current signal
if ((*Banderas).LinkVectors ) Write1Col("DNoiseVector.dat", DNoiseVector, (*Carrier).NPtos_Tot); // TEST train to file
// printf("DSNR=\t%e\tDSigmaNoise=\t%e\n",DSNR, DSigmaNoise); // TEST
if ((*Banderas).LinkVectors ) Write1Col("atElectFiltInput.dat", RZPulsesTrain, (*Carrier).NPtos_Tot); // TEST train to file
ElectricalFilter(RZPulsesTrain, (*Carrier).NPtos_Tot, SamplingPoint, Network);
if ((*Banderas).LinkVectors ) Write1Col("ElecFilt.dat", RZPulsesTrain, (*Carrier).NPtos_Tot); // TEST train to file
}
int main(int argc, char **argv) {
int Erste= 0; // write file auxiliary
unsigned long int i;
unsigned char buf[BUFFERMAX];
int maxdata=BUFFERMAX;
int SamplingPoint; // Decision point (varies for each filter)
// Simulation parameters declaration
GENDRIVE Carrier;
DeviceSTR Network;
SuperGaussian Gauss;
InputParameters(&Carrier, &Gauss, &Network); // SYSTEM PARAMETERS
// Flags and default values
int c;
unsigned int transmitters= 128; // Default number of Tx
Gauss.r_ex= 10; // Default [dB] Extinction ratio [10~15 Grosz priv. comm. 090210]
float DSNR=0;
float OSNR=0;
FLAGS Banderas;
Banderas.Eye= 0; // Generates eye diagramme file
Banderas.LinkVectors= 0; // Generates intermediates steps files
Banderas.Pmeans= 0; // Intermediate mean powers -> stdout
// Command line options (using getopt)
while ((c= getopt(argc, argv, "elpc:d:o:r:") ) != -1) {
switch (c) {
case 'e':
Banderas.Eye= 1; // Generates eye diagramme file
break;
case 'l':
Banderas.LinkVectors= 1; // Generates intermediates steps files
break;
case 'p':
Banderas.Pmeans= 1; // Intermediate mean powers -> stdout
break;
case 'c':
transmitters= atoi(optarg); // Argument: number of Tx
break;
case 'd':
DSNR= pow(10.0,atof(optarg)/10.0); // Argument: DSNR [dB] -> DSNR [1]
break;
case 'o':
OSNR= pow(10.0,atof(optarg)/10.0); // Argument: OSNR [dB] -> OSNR [1]
break;
case 'r':
Gauss.r_ex= atof(optarg); // Argument:Extinction ratio [dB]
break;
case '?':
if (optopt == 'c')
fprintf (stderr, "Option -%c requires argument: # transmitters.\n", optopt);
if (optopt == 'd')
fprintf (stderr, "Option -%c requires an argument: DSNR[dB].\n", optopt);
if (optopt == 'o')
fprintf (stderr, "Option -%c requires an argument: OSNR[dB].\n", optopt);
if (optopt == 'r')
fprintf (stderr, "Option -%c requires an argument: Extinction ratio[dB].\n", optopt);
else if (isprint (optopt))
fprintf (stderr, "Unknown option `-%c'.\n", optopt);
else
fprintf (stderr,"Unknown option character `\\x%x'.\n",optopt);
return 1;
default:
abort ();
}
}
// Rx power
Gauss.r_ex = pow(10.0, Gauss.r_ex/ 10.0); // [1] Extinction ratio
// (*Gauss).r_ex= 1.1; // TEST
//printf("r_ex[dB]= %e\n",Gauss.r_ex); // TEST
Gauss.P_0= 2.0* Gauss.P/ (1.0+ Gauss.r_ex); // [W] '0'
// printf("P_0[W]= %e\n",Gauss.P_0); // TEST
Gauss.A_0= sqrt( Gauss.P_0 ); // [sqrt{W}] '0' bit amplitude
float P_1NRZ= Gauss.P_0* Gauss.r_ex; // [W] '1' bit power full duty cycle
// Gauss.P_peak= P_1NRZ/ Carrier.Duty_Cycle; // [W] duty cycle corrected '1' bit power (square pulse aprox)
Gauss.P_peak= P_1NRZ; // [W] '1' bit power (square pulse aprox)
Gauss.A_peak= sqrt( Gauss.P_peak); // [sqrt{W}] duty cycle corrected '1' bit amplitude
// printf("P_0= %e\tA_0= %e\tP_p= %e\tA_p= %e \n",Gauss.P_0, Gauss.P_peak, Gauss.A_0, Gauss.A_peak); // TEST
// printf("Tx= %i\tDSNR= %e \t OSNR= %e \t r_ex= %e\n",transmitters, DSNR, OSNR, Gauss.r_ex); // TEST
// float IthFrac= atof( argv[4]);
// float IthFrac= atof( argv[4])/100; // TEST Ith comment
// printf("IthFrac= %e\n",IthFrac); // TEST Ith
/*
// Attenuation
float FAtt= 1.0;
float FAtt= exp(-0.5* pow(10, Network.alpha/ 10)* Network.length );
printf("FAtt=\t%e\n",FAtt); // TEST
*/
float RZBit1Gauss[Carrier.NPtos_Bit];
float AuxTemp[Carrier.NPtos_Bit];
float OSigmaNoise, DSigmaNoise;
float Id= BitSlots(&Banderas, &Carrier, &Gauss, &Network, OSNR, &OSigmaNoise, DSNR, &DSigmaNoise, transmitters, RZBit1Gauss, AuxTemp); // TEST Ith comment
// float Id= BitSlots(&Carrier, &Gauss, &Network, OSNR, &OSigmaNoise, DSNR, &DSigmaNoise, transmitters, RZBit1Gauss, AuxTemp, IthFrac); // TEST Ith uncomment
while( ( Carrier.N_Bits= fread(buf,1,maxdata,stdin) )> 0) {
/* // INPUTS READ
unsigned char InBitString[Carrier.N_Bits+50];
for(i=0; i<50; i++) InBitString[i]='0';
for(i=0; i<Carrier.N_Bits; i++) InBitString[i+49]=buf[i];
*/
unsigned char InBitString[Carrier.N_Bits];
for(i=0; i<Carrier.N_Bits; i++) InBitString[i]=buf[i];
Carrier.NPtos_Tot= Carrier.NPtos_Bit* Carrier.N_Bits; // Total # points
// printf("#bits: %i\tdt: %3e\n",Carrier.N_Bits,Carrier.dt); // TEST
// Tx
float RZPulsesTrain[Carrier.NPtos_Tot];
RZTrain(&Banderas, RZPulsesTrain, &Carrier, &Gauss, RZBit1Gauss, InBitString, Carrier.N_Bits, transmitters);
// Network elements
Link(&Banderas, &Carrier, RZPulsesTrain, &OSigmaNoise, &DSigmaNoise, &Network, &SamplingPoint, AuxTemp);