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b128noisesim.c
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#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; // [dB] Tx -> EDFAin 2dB fibre, 1.0dB insertion
(*Network).FAtt1= pow(10, FAtt1/ 20); // [1] Tx -> EDFAin for amplitude
float FAtt2= -2.0 -1.0; // [dB] EDFAout -> Rx 2dB fibre, 1.0dB insertion
(*Network).FAtt2= pow(10.0, FAtt2/ 20.0); // [1] EDFAout -> Rx amplitude
float EDFAgain= -24.0; // [dB] Att at 128 star <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);
float DSigmaNoise= sqrt(sigma_thermal2);
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
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]
+(-0.8406758501 * yvo[0] )+ (1.8268331110* yvo[1] ); // BUTTERWORTH CutOff= 12.5GHz
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
samplerate = 6.4E11 = 2^6/ bit slot
*/
/*
// FILTER ORDER 6
// #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
*SamplingPoint= 48; // opt: 17.5 ord 6 / elec: 7 ord 2
break;
case 14:
eGAIN= 2.326204969e+02; // CutOff= 14 GHz
*SamplingPoint= 40; // opt: 12.5 ord 2 / elec: 14 ord 2
// *SamplingPoint= 61; // opt: 12.5 ord 6 / elec: 14 ord 2
// *SamplingPoint= 51; // opt: 17.5 ord 6 / elec: 14 ord 2
break;
default:
eGAIN= 2.326204969e+02; // CutOff= 14 GHz
*SamplingPoint= 40; // opt: 12.5 ord 2 / elec: 14 ord 2
// *SamplingPoint= 61; // opt: 12.5 ord 6 / elec: 14 ord 2
// *SamplingPoint= 51; // opt: 17.5 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
// ( -0.9073853925 * yve[0]) + ( 1.9028831033 * yve[1]); // opt: 17.5 ord 6 / elec: 7 ord 2
// 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];