基于Simulink的直接序列扩频通信系统仿真研究  

Simulation of Direct Sequence Spread Spectrum Communication System Based on Simulink

作　　者：王家明 於维程 何勇 王炜 孙晨 WANG Jiaming;YU Weicheng;HE Yong;WANG Wei;SUN Chen(Shanghai Aerospace Electronic Technology Inst让ute,Shanghai 201109,China)

机构地区：[1]上海航天电子技术研究所,上海201109

出　　处：《信息与电脑》2021年第15期201-204,共4页Information & Computer

摘　　要：本文详细阐述了扩频通信系统中快速傅里叶变换(Fast Fourier transform,FFT)重叠变换干扰抑制、数字匹配滤波器捕获算法、延迟锁相环跟踪算法以及Costas环载波同步的基本原理和仿真模型,并通过Simulink工具对直接序列扩频通信各阶段波形和频谱变化进行了仿真验证。结果表明此仿真模型不仅能够抑制窄带干扰信号、完成伪码的快速捕获跟踪和载波的精确同步,实现基带信号的复原,还可为直接序列扩频通信的开发应用提供理论支撑和仿真验证,加快其工程化应用进程。The basic principles and simulation models of FFT overlap transform interference suppression, digital matched filter capture algorithm, delayed phase-locked loop tracking algorithm and Costas loop carrier synchronization in spread spectrum communication system are elaborated, and the waveform and spectrum variations of each phase of direct sequence spread spectrum communication are simulated and verified by Simulink tool. The results show that this simulation model can not only suppress narrowband interference signals, complete the fast capture and tracking of pseudocodes and accurate synchronization of carriers, and realize the recovery of baseband signals, but also provide theoretical support and simulation verification for the development and application of direct sequence spread spectrum communication.

关 键 词：直接序列扩频 FFT重叠变换干扰抑制 数字匹配滤波器 延迟锁相环跟踪 SIMULINK 

分 类 号：TN391.9[电子电信—物理电子学]