Costas环法BPSK信号解调的研究与实现  

Research and Implementation of BPSK signal Demodulation based on Costas

作　　者：刘艳华[1] 

机构地区：[1]盐城工学院信息工程学院,江苏盐城224051

出　　处：《通信技术》2012年第1期16-17,21,共3页Communications Technology

摘　　要：载波同步与解调是通信系统中的关键技术之一。二相相移键控(BPSK)、四相相移键控(QPSK)调制是最基础、最常见的2种相移键控调制方式,应用比较广泛,因此其信号的正确、快速解调的研究变得非常重要。这里主要研究了科斯塔斯(Costas)环法BPSK信号的解调方法,QPSK信号可以看成2路BPSK信号,不难以文中所述为基础实现QPSK信号的解调。在Simulink平台对BPSK信号的解调进行了仿真,介绍了BPSK信号的产生、载波同步解调过程的仿真模型,给出了比较详细的实现过程,对仿真结果进行分析。仿真结果表明,文中搭建的仿真模型能够实现BPSK信号的解调。Carrier synchronization and demodulation is the key technology for communication system, and BPSK modulation is the most basic and most widely-used modulation. So the correct and fast demodulation becomes very important. This paper studies BPSK demodulation based on costas. QPSK signal could be regarded as two BPSK signals, its demodulation is not so difficult. The simulation of BPSK signal demodulation is done on simulink platform, and BPSK generation and simulation model of the carrier synchronous demodulation are also given in this paper. Simulation results show that the simulation model could correctly implement BPSK signal demodulation.

关 键 词：二相相移键控 解调 科斯塔斯环 仿真 

分 类 号：TN914.42[电子电信—通信与信息系统]