載波同步是解調系統中的關鍵技術，本文針對320Mbps 全數字并行解調系統中的載波
同步算法進行研究。文中對比傳統解調系統，對全數字系統的中頻采樣、并行化結構進行了介紹，并針對載波同步技術的并行化應用進行了分析，給出了適應并行系統的并行載波同步算法。最后利用Matlab 軟件中的Simulink 工具進行系統和載波同步模塊的仿真，并給 仿真結果和主要指標，證明了本研究具有實用意義。關鍵詞
高速全數字解調，并行結構，并行載波同步

Research of parallel Carrier Synchronization in High-speed all-digital demodulation Pei Nan CHEN Jinshu (Department of Electronic Engineering, Tsinghua University, Beijing 100084, China) Abstract: Carrier synchronization is a key part of demodulation systems. The purpose of this paper is to research the algorithm of carrier synchronization in parallel demodulation system. Based on 320Mbps QPSK digital demodulator, the parallel structure and IF sampling are introduced. The parallel application of carrier synchronization is explained and analyzed in this paper. Moreover, the process of carrier recovery and demodulation system with parallel structure are simulated by computer, the performance of such digital demodulator and carrier recovery are shown by schemes.
Key words: high-speed all-digital demodulation, parallel structure ， parallel carrier Synchronization