Chapter 3 treats the algorithm implementation of demodulator in the receiving asic of dvb - s . in detail , demodulation includes carrier recovery and symbol synchronization . together with the transmission characterization of band - limited input signals the chapter proposes a scheme for implementing carrier recovery loop 解調具體分為載波恢復、時鐘同步兩大部分,本章著重論述了載波恢復的原理并結合dvb - s輸入信號傳輸特性,提出了相應的實現方案,對部分電路進行了性能分析。