卫星扩频通信中一种级联的干扰抑制技术  

A Combined Anti-jamming Technology for Satellite Spreadspectrum Communication System

作　　者：刘利子[1,2] 任前义[1,2] 龚文斌[1,2] 

机构地区：[1]上海微小卫星工程中心,上海201203 [2]中国科学院上海微系统与信息技术研究所,上海200050

出　　处：《遥测遥控》2013年第6期45-49,共5页Journal of Telemetry,Tracking and Command

摘　　要：针对卫星扩频通信系统,研究一种射频抗干扰技术——自适应包络限幅(Smart AGC)技术,提出将Smart AGC与FFT频域抗干扰技术级联抑制干扰的思想,并说明了Smart AGC技术的工作原理和实现方案。建立仿真模型,给出Matlab仿真测试结果,并对级联抗干扰技术与单级FFT频域抗干扰技术的抗干扰性能进行比较。仿真结果表明,在单音干扰条件下,当干噪比(JNR)大于55dB时,级联抗干扰技术的性能优于单级FFT频域抗干扰技术。The technology of Smart AGC is studied for the satellite spread-spectrum communication system. The idea of cascading the Smart AGC technology and FFT-based frequency domain anti-jamming technology is proposed to suppress the interference. The formulas of Smart AGC technology are given,and the implementation is analyzed. The influence of Smart AGC technology on BER performance in the satellite system is simulated. The performances of the cascaded method compared with the single FFT based frequency domain anti-jamming method are given. The results show that the cascaded method has better performances when JNR is bigger than 55dB on the condition of single tone interference.

关 键 词：卫星扩频通信系统 SMART AGC FFT频域抗干扰 级联抗干扰 

分 类 号：TN911.72[电子电信—通信与信息系统]