基于扩频通信系统接收同步技术的仿真设计

摘要

扩频系统接收机的好坏直接决定了整个通信系统的性能。在直接序列扩频通信系统的基础上，提出了一种位同步方法，结合科斯塔斯（Costas）环的载波同步方法和数字匹配滤波器的扩频码同步方法，建立了直接序列扩频通信系统模型。最后，采用MATLAB R2006 b/SIMULINK工具，对该系统进行整体仿真。本系统经过仿真，验证其正确性，为以扩频通信为基础的现代通信的研究和设计提供参考。%The quality of spread spectrum receiver directly determines the performance of the whole communi-cation system .Based on the communication system of DSSS ( Direct Sequence Spread Spectrum ) , this paper propo-ses a bit-synchronization method and builds a communication system model of DSSS , combining the carrier-synchro-nization method of Costas loop and the spread spectrum code-synchronization method of DMF ( Digital Matched Fil-ter).At last, simulation of spread spectrum system is implemented with MATLAB R 2006b.The simulation result shows that this communication system is precise and has some reference significance for the simulation and design of modern communication system based on spread spectrum communication .