高速全數(shù)字解調(diào)中并行載波同步的研究

載波同步是解調(diào)系統(tǒng)中的關(guān)鍵技術(shù)，本文針對320Mbps 全數(shù)字并行解調(diào)系統(tǒng)中的載波
同步算法進(jìn)行研究。文中對比傳統(tǒng)解調(diào)系統(tǒng)，對全數(shù)字系統(tǒng)的中頻采樣、并行化結(jié)構(gòu)進(jìn)行了介紹，并針對載波同步技術(shù)的并行化應(yīng)用進(jìn)行了分析，給出了適應(yīng)并行系統(tǒng)的并行載波同步算法。最后利用Matlab 軟件中的Simulink 工具進(jìn)行系統(tǒng)和載波同步模塊的仿真，并給 仿真結(jié)果和主要指標(biāo)，證明了本研究具有實(shí)用意義。關(guān)鍵詞
高速全數(shù)字解調(diào)，并行結(jié)構(gòu)，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