例4：在sinc(t)信号中叠加噪声，分析对应频谱 fs=100 采样频率,必须大于两倍基带信号最高频率 ts=1/fs 采样时间间隔 T=2 时间窗大小 - x=x+0.1*randn(1,N) x=awgn(x,-10, measured ) figure plot(t,x) title( 时域信号图 ) xlabel( t /s ) y=fft(x,N) figure if mod(N,2)~=0

ofdm 传输与接受的各项例子 -OFDM Receiver 1. Initalize the USRP setting the RX parameters and moving the LO outside the transmission band. 2. Generate random data bits (PN Sequence) (125 bits) 3. Use the Van De Beek algorithm to detect the cyclic prefix