摘要
直接序列扩频信号具有低功率谱密度发射的隐蔽性、抗干扰能力强、低检测率等特点,因此对直扩信号进行干扰将非常困难。为达到良好的干扰效果,必须保证干扰信号经接收机解扩后的干扰功率足够大。针对直扩系统扩频码本身的特点,建立了数学模型,从理论上推算出在干扰信号输入功率一定的情况下,接收机末端干扰信号输出功率与相对带宽的关系,即存在一个最佳相对带宽,使得干扰信号输出功率最大,进而保证了最优干扰效果。
The jamming implementation is difficult for Direct-Sequence Spread-Spectrum （ DSSS） signal because of its character-istics such as low-power spectrum density transmission invisibility,high anti-jamming capability,low probability of detection （LPD）, etc.In order to realize better jamming effect,it must ensure that the power of jamming signal de-spreaded by receiver is high enough. Based on the characteristics of the spread-spectrum code of DSSS system,this paper builds a math model,and calculates the relation be-tween the output power of signal at the end of receiver and relative bandwidth under a certain input power of jamming signal.This is to say,there is an optimal relative bandwidth,which makes the highest output power of jamming signal,and can ensure an optimal jamming effect.
出处
《无线电工程》
2014年第4期71-72,80,共3页
Radio Engineering
关键词
干扰
直扩通信
干扰信号带宽
MATLAB
jamming
direct-sequence spread-spectrum （ DSSS） communication
jamming signal bandwidth
MATLAB
