数字调制就是把数字基带信号的频谱搬移到高频处，形成适合在信道中传输的带通信号。基本的数字调制方式有振幅键控（ASK）、频移键控（FSK）、绝对相移键控（PSK）、相对（差分）相移键控（DPSK）。在接收端可以采用想干解调或非相干解调还原数字基带信号。 -Digital modulation is the spectrum shifting to high frequency digital baseband signals, suitable for the formation of ban

Digital Processin - Optical Transmission and Coherent Receiving Techniques 电子书完整版

相干光接收数字滤波器，有着非常详细的数字滤波器的算法实现流程，对相干数字滤波器的构建具有重要指导意义。(Coherent optical receiving digital filter has a very detailed algorithm flow of digital filter, which has important guiding significance for the construction of coherent digital filter.)