DSB调制和相干解调系统仿真 fm=2-figure subplot(311) plot(f,abs(yr)/N) title( 接收信号与相干载波相乘后的频谱 ) xlabel( f /Hz )

This function was written to allow rotation of both X and Y labels without making tricky guesswork about how to rescale the image. It works on full figures and subplots, and more control over scaling can be obtained by using subplot in combination

产生一正态分布序列 经过pcm编码、PCM解码、计算量化信噪比、设置信道误码率 -Generating a normal sequence after pcm encoding, PCM decoding, computing quantization noise ratio, set the channel error rate x = randn (1,1000) generating a normal sequence xf = fft (x, 256) 1024 da