ip_05_09.m

数字通信第四版原书的例程

% MATLAB script for Illustrative Problem 9, Chapter 5.
echo on
SNRindB1=5:1:25;	  		
SNRindB2=5:0.1:25;			
M=16;
for i=1:length(SNRindB1),
  % simulated error rate
  smld_err_prb(i)=smldPe58(SNRindB1(i));    
end;
for i=1:length(SNRindB2),
  SNR_per_bit=exp(SNRindB2(i)*log(10)/10);  
  % theoretical error rate
  theo_err_prb(i)=(2*(M-1)/M)*Qfunct(sqrt((6*log2(M)/(M^2-1))*SNR_per_bit));					     
end;
% Plotting commands follow
semilogy(SNRindB1,smld_err_prb,'*');
hold
semilogy(SNRindB2,theo_err_prb);