高速全数字解调中并行载波同步的研究

载波同步是解调系统中的关键技术，本文针对320Mbps 全数字并行解调系统中的载波
同步算法进行研究。文中对比传统解调系统，对全数字系统的中频采样、并行化结构进行了介绍，并针对载波同步技术的并行化应用进行了分析，给出了适应并行系统的并行载波同步算法。最后利用Matlab 软件中的Simulink 工具进行系统和载波同步模块的仿真，并给 仿真结果和主要指标，证明了本研究具有实用意义。关键词
高速全数字解调，并行结构，并行载波同步

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