一款无源定位系统集成式测试信号源设计  

Design of the integrated signal source for passive positioning system testing

作　　者：张广元 孙秀斌[2] 陈凯[1] 何越[1] Zhang Guangyuan;Sun Xiubin;Chen Kai;He Yue(Anhui Meteorological Observation Technical Center,Hefei 230061,China;Chengdu University of Inform ation Technology,Chengdu 610103,China)

机构地区：[1]安徽省大气探测技术保障中心,合肥230061 [2]成都信息工程大学,成都610103

出　　处：《电子测量技术》2020年第17期164-169,共6页Electronic Measurement Technology

摘　　要：为满足某款无源定位系统功能测试的需要,设计了一款以FPGA芯片为控制核心的模拟信号源。信号源基于直接数字频率合成器(DDS)技术生成特征频段的模拟辐射信号;同时,信号源内部GPS接收模块解码自身实时位置,并通过无线通信同步传输给地面无源定位系统。比较系统对信号源位置的探测结果和GPS定位结果,可对系统定位功能进行评估和完善。结果表明特征频段(VHF、VLF/LF)信号频率抖动范围在0.1%以内,并能实现信号源位置信息秒级的同步收发,基本达到预期目标。In order to meet the needs of functional testing of a passive positioning system,an analog signal source which uses FPGA as the core control is designed.The signal source based on direct digital frequency synthesizer(DDS)technology to generate characteristic frequency signals,and the GPS receiving module inside the signal source decodes its real-time location and transmits these messages to the passive positioning system on the ground by means of wireless communication synchronously.By comparing the detection results of the signal source with the GPS positioning results,the performance of the passive positioning system can be evaluated and improved.The results show that the frequency jitter range of the signal in the characteristic frequency band(VHF、VLF/LF)is within 0.1%,the information of signal source position can be transmit-received synchronously in seconds either,reach the expecting target basically.

关 键 词：FPGA DDS GPS 无源定位 信号源 

分 类 号：P415.3[天文地球—大气科学及气象学]