摘要
近年来 ,非平稳干扰对扩频系统的影响越来越受到人们的重视 ,这类干扰最具代表性的形式为线性调频 ( LFM)信号。由于 LFM信号的频率随时间线性变化 ,因此从理论上分析接收机的抗干扰性比较困难。本文通过 Monte- Carlo模型进行计算机仿真 ,分析直接序列扩频( DSSS)系统对 LFM干扰的抗干扰性 ,绘出了不同干扰参数的误码率 ( BER)曲线 。
The effect of non-stationary interference on spread spectrum system gets more and more attention, of which most typical is linear frequency modulated (LFM) signal. Because its frequency varies linearly as time, so it is more difficult to analyze the receiver's immunity. This paper presents the receiver model and analyses the immunity of direct sequence spread spectrum (DSSS) system on LFM interference. The curves of error-bit-rate (BER) under different interference parameters are given by means of Monte Carlo simulating, the performance analysis is presented at last.
出处
《火控雷达技术》
2004年第2期71-74,共4页
Fire Control Radar Technology
