基于QPSK调制的扩频系统MATLAB仿真  

MATLAB Simulation of Spread Spectrum System Based on QPSK Modulation

作　　者：张起晶[1] 孙桂芝[1] 

机构地区：[1]黑龙江科技学院电信学院,黑龙江哈尔滨150000

出　　处：《现代科学仪器》2014年第1期70-72,共3页Modern Scientific Instruments

基　　金：基金资助：黑龙江省教育厅资助项目（项目号：12511475）,项目题目：基于能量高效的水声传感器网络路由技术研究

摘　　要：扩展频谱通信技术是现代通信技术的热点之一，是一种非常重要的抗干扰通信技术，因为其信号所占有的频带宽度远大于所传信息必需的最小带宽，从而能达到抗干扰的目的。本文对QPSK直接扩频通信系统进行了研究。介绍了QPSK扩频调制解调原理，通过MATLAB编程完成QPSK扩频通信系统调制解调系统的仿真，完成了误码率仿真，为直接序列扩频通信系统奠定了基础。Spread spectrum communication technology is one of the focus of modem communication technology.It is a very important anti-jamming technology, because the minimum bandwidth occupied the signal band width is much larger than the information required,thus the purpose of anti-interference can be achieved.The QPSK direct sequence spread spectrum communication system has been studied in this paper.The principle of the QPSK spread spectrum modulation and demodulation is introduced.We have completed the simulation of QPSK spread spectrum communication system of modulation and demodulation system by programming, and completed the BER simulation and laid the foundation for the direct sequence spread spectrum communication system.

关 键 词：QPSK扩频调制 误码率 蒙特卡洛仿真 

分 类 号：TH022[机械工程]