摘要
二相相移键控(BPSK)调制是最基础、最常见的相移键控调制方式,载波同步与解调是通信系统中的关键技术之一。本文以直接序列扩频通信系统为研究对象,介绍了科斯塔思环(Costas环)的基本原理及数学模型,给出BPSK信号的产生、载波同步解调过程的仿真模型,搭建的仿真模型能够成功实现BPSK信号的同步解调。
BPSK modulation is the most basic and most widely-used modulation,Carrier synchronization and demodulation is the key technology for communication system,The paper investigates the Costas loop to realize the Carrier synchronization in Direct Sequence Spread Spectrum System(DSSSS).Principle of Costas loop and mathematic model are presented,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.
作者
丁凯
Ding Kai(No.92785 Troops of Navy,Suizhong 125208,China)
出处
《信息化研究》
2021年第1期74-78,共5页
INFORMATIZATION RESEARCH
关键词
COSTAS环
载波同步
仿真
Costas-loop
carrier synchronization
simulation
