OFDM通信系统与QPSK系统性能比较(14)

%+++++++++++++++加入保护间隔++++++++++++++++++++ clength=N+N/16; PVout=zeros(1,clength); col=(N-N/16+1):(N); PVout=[ifftout(col),ifftout];

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

%+++++++++++++++++高斯白噪声信道+++++++++++++++++ gsrv=awgn(PVout,SNR_System,'measured');

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

%接收机

%+++++++++++++++++++++去保护间隔++++++++++++++++++++++++

movep=zeros(1,N); length=(N/16+1):(N+N/16); movep=gsrv(length);

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

%+++++++++++++++++++++FFT++++++++++++++++++++++++++++

fftout=(fft(movep))/N;

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

%+++++++++++++++QPSK解调++++++++++++++++++++++++++++

%outsign=qpskout(fftout,count,k); count=1; K=1;