摘要
扩频测控通信系统的抗干扰性能关系到卫星在战时复杂电磁环境中的生存能力。针对目前测控通信系统抗干扰能力完全取决于扩频增益的现状,分析了卫星扩频测控链路的抗干扰能力,研究了一种时频结合的干扰抑制算法。该算法在频域完成干扰的检测和滤波器设计,在时域完成干扰消除,重点阐述了干扰检测方法以及可变FIR滤波器的设计及实现方法。仿真结果表明,该算法可提升系统抗干扰能力30 dB以上,信噪比损失小,在无干扰时可以做到零损失。
The anti-jamming performance of the spread spectrum TT&C is related to the survivability of the satellite in the complex electromagnetic environment during wartime. Focus on the limited anti-jamming capacity for TT&C, the anti-jamming ability of satellite spread spectrum measurement and control link is analyzed, and a time-frequency combined interference suppression algorithm is studied. The algorithm performs interference detection and FIR design in the frequency domain to complete interference cancellation in the time domain. The method of interference detection and the design and implementation of variable FIR filter are emphasized. Simulation results indicate that the algorithm can improve more than 30 dB for TT&C anti-jamming capacity, and cause little SNR loss, even 0 dB when no jam is detected.
作者
谭维凤
王雪宾
窦骄
TAN Wei-feng;WANG Xue-bin;DOU Jiao(DFH Satellite Co.,Ltd.,Beijing 100094,China)
出处
《通信技术》
2018年第12期2836-2840,共5页
Communications Technology
关键词
扩频测控
抗干扰能力
时频结合
干扰消除
spread spectrum TT&C
anti-jamming capacity
time-frequency combination
interference cancellation
