DSSS卫星通信系统中多音干扰抑制研究

利用接收信号的快速傅里叶变换（FFT）和信号相关解调实现多音干扰的时域重建,并以此来抑制多音干扰。在加性高斯白噪声信道（AWGN）环境中,仿真分析了固定干信比条件下不同信噪比（SNR）和固定信噪比条件下不同干信比（JSR）时这一方法抑制多音干扰的性能,并与＂门限剔除＂抑制多音干扰和无干扰抑制进行了比较。在有无信道编译码两种情形下,这一方法对DSSS（直接序列扩频）卫星通信中的多音干扰有较强的抑制能力。

Research on elimination of multi-tone jamming in DSSS satellite communication system

A muhi-tone jamming elimination scheme for DSSS satellite communication system is proposed, which is based on fast fourier transform （FFT） and correlation-type demodulation. The performance of the scheme to eliminate the multi-tone jamming in AWGN channel environment is simulated and analyzed,with settled JSR,different SNRS,and settled SNR,different JSRS. It proved that the scheme is much better than the method of ＂threshold elimination＂, also than without jamming elimination. It shows good ability to reject the jamming when channel encoder is given or not in DSSS satellite communication system.