实现通信系统中常用的调制方式，包括卫星常用的恒包络调制：SOQPSK和MUQPSK。以及连续相位调制PCM-FM和常见的BPSK和QPSK。-Commonly used in communications systems modulation, including satellite commonly used constant envelope modulation: SOQPSK and MUQPSK. And continuous phase modulation PCM-FM and t