OFDM通信系统与QPSK系统性能比较(12)

附录：MATLAB程序清单 %main_OFDM.m

%OFDM通信系统的仿真设计，包括QPSK或QAM数字调制、IFFT、 %保护间隔、高斯信道建模、FFT、解调、计算信噪比及PAPR clear all;

%+++++++++++++++++++++++++++++++++++++++++++++++++ %seq_num

%SNR_Pre 设定用于仿真的信噪比的初值 %interval_SNR 设定用于仿真的信噪比间隔 %frame_num 每一个信噪比下仿真的数据的帧数 %Pe 用于计算出现的误比特数 %N 子载波数

%+++++++++++++++++++++++++++++++++++++++++++++++++ N=64; SNR_Pre=1; interval_SNR =1; Pe=zeros(1,20);

%发射机 frame_num =5000;

for SNR_System=SNR_Pre:interval_SNR:20 counter=0;

for seq_num=1:frame_num

%+++++++++++++++输入数据++++++++++++ datain=randint(1,N);

%+++++++++++++++++++++++++++++++++++

%++++++++++++++QPSK调制++++++++++++++ qpskin=reshape(datain,2,[]);%将生成序列变成两行 qpskflection=(ones(2,N/2)).*(-1);