GPS天线阵抗干扰射频前端设计  

Antenna array anti-jamming RF front-end of GPS

作　　者：魏涛 杨祖芳 潘伟[3] 郑建生[1,3] Wei Tao1, Yang Zufang2, Pan Wei3, Zheng Jiansheng1,3(1. Electronic Information School, Wuhan University, Wuhan 430072, China ; 2.Information Engineering College, Wuhan Technology and Business University, Wuhan 430065, China 3.GNSS Research Center of Wuhan University,Wuhan 430072, Chin)

机构地区：[1]武汉大学电子信息学院,湖北武汉430072 [2]武汉工商学院信息工程学院,湖北武汉430065 [3]武汉大学卫星导航定位技术研究中心,湖北武汉430072

出　　处：《电子技术应用》2018年第5期119-123,共5页Application of Electronic Technique

基　　金：国家自然科学基金项目(61273053)

摘　　要：卫星导航定位系统的抗干扰技术研究意义重大。基于天线阵列的抗干扰技术需要同时采集多路GPS天线信号,而通用GPS接收机大多只能接收单路天线信号,难以满足需求。为此,设计了一种四元天线阵列的GPS抗干扰射频前端。通过四元天线阵列分别接收四路GPS信号,经过低噪声放大器、射频滤波器、下变频到中频信号,以供给后级A/D采样,经抗干扰模块后达到抗干扰目的。最后,对此射频前端进行整体电路测试,并给出了测试结果。经实际应用,验证了该系统方案的可行性。Global Navigation Satellite System（ GNSS） is of great significance for anti-interference research. The signal acquisition of anti-interference technology based on antenna array needs multiplex signals, which is difficult for the general signal channel Radio Frequency（ RF） front-end. The system was designed for the GPS anti-jamming RF front-end of four-element antenna array. The system received four channels of GPS signals through the four-element antenna array. After the processing of a low noise amplifier,RF filters, RF chip of GP2015 and down-conversion, the received GPS signals was transformed into the intermediate frequency sig-nal, which was supplied to the A/D sampling behind. Besides, the sampling data was sent to anti-jamming modules to realize an-ti-jamming. Device selection for each unit is described in detail. Finally, the RF front-end of the whole circuit was justified. The feasibility of the system is verified by practical application.

关 键 词：GPS抗干扰 射频前端 四元天线阵列 

分 类 号：TN927[电子电信—通信与信息系统]