基于抗干扰算法FH/DS扩频系统的抗干扰性能研究

Based on Anti-jamming Algorithm System Anti-jamming Performance Research FH/DS Spread-spectrum

论述了FH/DS混合扩频系统抗干扰原理,对混合扩频系统进行设计,在系统接收端分别加入陷波、中值滤波抗干扰算法,在背景噪声为高斯白噪声的情况下,引入单音干扰、多音干扰,对混合扩频系统的抗干扰性能进行验证;在此基础上,针对了FH/DS混合扩频抗干扰系统在不同的干扰环境下的抗干扰能力进行了研究,并在高斯信道下进行了仿真。仿真结果表明,所研究的混合扩频抗干扰系统在信噪比相同的情况和信干比相同的情况下与其它的FH和DS扩频系统相比,取得2dB的性能增益,改善了DS/FH系统的抗干扰性能,大大提高了扩频通信系统的可靠性。

Discussed the anti--jamming principle of the FH / DS hybrid spread--spectrum system, designed the hybrid spread--spec- trum systems, joined the notch and the median filter algorithm to the receiving side. In the channel with the Gaussian white noise, introduced the Tone interference, multi--tone interference on the hybrid spread--spectrum anti--jamming system to verify the performance of the anti --jamming. On this basis, for the FH / DS hybrid spread--spectrum anti--jamming system in a different environment, the anti--interfer- ence ability is studied. The simulation is realized under Gauss channel, the results show that： Compared with the other FH and DS spread spectrum system without the anti--jamming algorithm, Hybrid Spread--Spectrum system get 2dB gain of the error rate in the same SNR and SIR, the DS / FH anti--jamming system improve the anti--jamming performance and greatly enhanced the reliability of the spread spectrum communication syslem.