Matlab Code for Performance Analysis (BER vs Eb_N0) of BPSK, QPSK & 16QAM, on 4G LTE

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Theman JIrnadu
Theman JIrnadu 2019-2-17
评论： Sumaira 2024-11-18，17:22
Please can someone kindly help to edit this code i got from Nischay Malhan (youtube account) to fit in for BER performance evaluation of bpsk, qpsk and 16qam on 4G LTE. Thank you you assist.
The code below:
clc;
close all;
EbN0dB=-4:1:24;
EbN0lin=10.^(EbN0dB/10);
colors={'k-*','g-o','r-h','c-s','m-s','y-*','k-p','b:s','m:d','g:p'};
index=1;
%BPSK
BPSK = 0.5*erfc(sqrt(EbN0lin));
plotHandle=plot(EbN0dB,log10(BPSK),char(colors(index)));
set(plotHandle,'LineWidth',1.5);
hold on;
index=index+1;
%M-PSK
m=2:1:5;
M=2.^m;
for i=M,
k=log2(i);
berErr = 1/k*erfc(sqrt(EbN0lin*k)*sin(pi/i));
plotHandle=plot(EbN0dB,log10(berErr),char(colors(index)));
set(plotHandle,'LineWidth',1.5);
index=index+1;
end
%Binary DPSK
Pb = 0.5*exp(-EbN0lin);
plotHandle = plot(EbN0dB,log10(Pb),char(colors(index)));
set(plotHandle,'LineWidth',1.5);
index=index+1;
%Differential QPSK
a=sqrt(2*EbN0lin*(1-sqrt(1/2)));
b=sqrt(2*EbN0lin*(1+sqrt(1/2)));
Pb = marcumq(a,b)-1/2.*besseli(0,a.*b).*exp(-1/2*(a.^2+b.^2));
plotHandle = plot(EbN0dB,log10(Pb),char(colors(index)));
set(plotHandle,'LineWidth',1.5);
index=index+1;
%M-QAM
m=2:2:6;
M=2.^m;
for i=M,
k=log2(i);
berErr = 2/k*(1-1/sqrt(i))*erfc(sqrt(3*EbN0lin*k/(2*(i-1))));
plotHandle=plot(EbN0dB,log10(berErr),char(colors(index)));
set(plotHandle,'LineWidth',1.5);
index=index+1;
end
legend('BPSK','QPSK','8-PSK','16-PSK','32-PSK','D-BPSK','D-QPSK','4-QAM','16-QAM','64-QAM');
axis([-4 24 -8 0]);
set(gca,'XTick',-4:1:24);
ylabel('Probability of BER Error - log10(Pb)');
xlabel('Eb/N0 (dB)');
title('Probability of BER Error log10(Pb) Vs Eb/N0');
grid on;

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采纳的回答

Sriram Tadavarty
Sriram Tadavarty 2021-1-5
编辑：Darel 2021-7-13
Hi Theman,
Bit error rate (BER) performance of a modulation scheme is independent of the technology used.
To get BER of PDSCH in LTE, you can look after this page. Do note that this example includes Turbo coding and HARQ, both of which can impact BER.
Hope this helps.
Regards,
Sriram

更多回答（4 个）

Kulith udara
Kulith udara 2022-6-3
thanks man
Zinan Nashat Zamil
Zinan Nashat Zamil 2022-12-18
how do i run this code?
Idin Motedayen-Aval
You also use the berawgn function from Communication Toolbox to generate these curves.
The code above uses the formulas for BER directly. The berawgn function makes those formulas transparent to the user.
Akshay
Akshay 2024-6-4
Write code of Quadrature Phase Shift Keying (QPSK) communication system and its Bit Error Rate (BER) performance under varying Signal-to-Noise Ratio (SNR)

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