摘要
卫星导航系统主要通过人造卫星作为信号转发的中继站,通过上下行链路建立地球站间的无线通信,可实现大容量、远距离、高覆盖面、低延时的信息传输,而且导航系统存在接收电平低、接收机灵敏度高、接收信号比较微弱、导航信号在同一频率发射、调制、信噪比极低、下行链路容易干扰等问题。系统分析了北斗卫星导航接收机抗干扰主要应用技术;介绍了接收机主要干扰类型;提出了时空二维联合处理(STAP)抗窄带干扰技术模型及最小均方误差滤波器(MMSE)算法;通过仿真研究,该方法抑制窄带干扰效果较好。
Satellite navigation system mainly uses man-made satellite as relay station for signal transmission,and establishes wireless communication between earth stations through uplink and downlink,which can realize information transmission with large capacity,long distance,high coverage and low delay.Moreover,the navigation system has low reception level,high receiver sensitivity,weak reception signal,and the navigation signal is transmitted and adjusted at the same frequency System,signal-to-noise ratio is very low,downlink is easy to interfere and so on.This paper systematically analyzes the main anti-jamming application technology of Beidou satellite navigation receiver,introduces the main jamming types of the receiver,puts forward the model of STAP anti narrow-band jamming technology and the MMSE algorithm,and through the simulation research,the method has a good effect in suppressing narrow-band jamming.
作者
林汝景
Lin Rujing(Guangzhou Haige Communication Group Co.,Ltd,Guangzhou Guangdong,510000)
出处
《电子测试》
2020年第2期40-42,65,共4页
Electronic Test
关键词
北斗卫星导航
接收机
扩频通信
时空二维滤波
MMSE算法
抗干扰
Beidou satellite navigation
receiver
spread spectrum communication
spatiotemporal twodimensional filtering
MMSE algorithm
anti-jamming
