摘要
RDSS(Radio Determination Satellite Service)是我国北斗一代卫星导航系统,其导航信号功率低,窄带干扰是RDSS经常会遇到的干扰。针对该情况提出了利用N-sigma算法生成门限的RDSS信号频域抗窄带干扰算法,将接收信号时域加窗后进行FFT(傅里叶变换)变换至频域,将超过门限的带内压缩频域点进行归零处理,门限通过采用N-sigma算法生成,然后恢复剩余信号至时域并进行时域重叠。最后通过利用MATLAB软件对抗干扰算法进行仿真,并通过对抗干扰前后功率进行评估,得出该抗窄带干扰算法的有效性。
RDSS(Radio Determination Satellite Service)is one of the Beidou satellite navigation system in our country,whose signal power is low,and the narrowband interference is an interference that RDSS often encounters.The algorithm Based on Nsigma threshold generation take the RDSS signal into frequency domain to suppress the narrowband interference in this situation.The received signal is windowed in time domain and then transform to the frequency domain.And the condensed frequency domain in-band is set as zero which is exceed the threshold by using the N-sigma algorithm,then restore the residual signal to the time domain and overlap.Finally,the anti-jamming algorithm is simulated by using MATLAB,and the effectiveness of the antijamming algorithm is obtained by evaluating the power before and after interference suppression.
出处
《电脑知识与技术（过刊）》
2017年第9X期222-224,228,共4页
Computer Knowledge and Technology
基金
河北科技大学国防预研课题资助
