main_picture.m

文件夹“AWGN”说明了系统误码率在均衡前后随SNR增加的变化。 （1）绘制误码率曲线。运行m文件：main_picture,调用主函数：ofdm_AWGN。 （2）绘制星座点图。运行m文件：sn

clear;clc 
loop=1:200;
%SNR_dB1 = -10:10;
SNR_dB0 =0:20;
[BER0,BER0_EQU] = ofdm_AWGN(SNR_dB0);
%[BER1] = ofdm_fading1(SNR_dB1);
%[BER2,BER2_EQU] = ofdm_fading2(loop);
%semilogy(SNR_dB0,BER0,'-*k',SNR_dB1,BER1,'-ok',SNR_dB1,BER2,'-xk')
%legend('AWGN','Two-Path Fading','Three-Path Fading')

figure
%semilogy(loop,BER0,'-xk')
%ylim([10e-2 0.2])
semilogy(SNR_dB0,BER0,'-*r',SNR_dB0,BER0_EQU,'-ok')
legend('unequ','equ')
%legend('unequ')
grid on
X = xlabel('SNR[dB]');
Y = ylabel('Pe ');
title('BER Performance of OFDM System')