曾峰的数字通信，主要包括波形成型，匹配滤波，AM调制解调，QPSK调制解调，FSK调制解调，最大似然检测等。-Digital communication has peaks, including waveform shaping, matched filtering, AM modulation and demodulation, QPSK modulation and demodulation, FSK modulation and demodulation, the maximum likelihood detection.