无线测控网下行通道中载波同步的设计和仿真分析  

Design and simulation of carrier synchronization in the receiving channel of wireless monitoring network

作　　者：李群峰[1] 孙宜进[1] 

机构地区：[1]上海交通大学电子工程系,上海200240

出　　处：《电子测量技术》2009年第2期83-85,共3页Electronic Measurement Technology

摘　　要：在无线测控网的下行通道中,需要提取一个与接收信号中的调制载波同频同相的相干载波来实现相干解调,而载波同步是其中的关键,其性能直接影响到整个基带的性能。在数字系统设计中,提取同步载波最常采用的是科斯塔斯环法(COSTAS)。本文主要介绍了COSTAS环法实现载波同步的原理,然后在Simulink环境下对COSTAS环进行建模,并且在QUARTUSII下进行的仿真,得出了比较满意的仿真结果。In the receiving channel of wireless monitoring network, we need to extract a signal which is the same as the carrier in frequency and phase to achieve coherent demodulation. Carrier synchronization is the key step of the whole process. The performance of carrier synchronization directly affects the performance of the entire baseband system. In the digital system design, COSTAS is the most commonly used to extract the carrier. This article introduces the principle of costas loop, then makes the model of costas loop in simulink environment, and carried out the simulation in QUARTUS Ⅱ , obtained satisfactory result.

关 键 词：载波同步 COSTAS环 VCO振荡器 环路滤波器 

分 类 号：TN919.34[电子电信—通信与信息系统]