MATLAB and Simulink resources for Arduino, LEGO, and Raspberry Pi

# Thread Subject: How to use fir2 filter for NRZ code

 Subject: How to use fir2 filter for NRZ code From: Amelie Date: 29 Apr, 2012 12:03:08 Message: 1 of 1 Hi, I need to implement communication system in Matlab. One of many problems that I have is to excecute the code below using fir2 filter, and then I need to use created filter to filter NRZ code. Can you please help me by giving me some advices.   clear all close all clc Ts = 5e-2; Tb = 1e-1; Nb = 1e5; bs = round(rand(1,Nb)); %bs = [1 0 1 0 1 1 0 0 1]; % Nb = size(bs,2); x = 0; M = Tb/Ts; for k = 1:Nb %x = [x bs(k)*ones(1,Tb/Ts)] ; if(bs(k) == 0) x(M*(k-1)+1:k*M) = -1*ones(1,Tb/Ts); else x(M*(k-1)+1:k*M) = 1*ones(1,Tb/Ts); end end %save testfiles 'x' 'bs' %x = x(2:end); %figure(1) %subplot(3,1,1) %stem(0:size(bs,2)-1,bs) %subplot(3,1,2) t = 0:1:(size(x,2)-1); t = t*Ts; %plot(t,x,'m','LineWidth',4); %hold on EbN0 =[1 5 10 15 20 25]; % EbN0 = SNR *Tb/Ts; SNR = EbN0*Ts/Tb; for n = 1:size(SNR,2) y = awgn(x,SNR(n),'measured'); %plot(t,x,'k') tod = round(M/2); pod = 0; for k=1:Nb t_symbol = y(M*(k-1)+1:M*k); t_symbol = t_symbol(tod); if(t_symbol > pod) dbs(k) = 1; else dbs(k) = 0; end end