基于分布式光纤协同的近场无源测相定位技术研究  

Near-field Passive Location Technology Based on Phase Measurements among Distributed Fiber Sensor Nodes

作　　者：彭玉兰[1] 闫连山[1] 周涛[2] 李文亮[2] 李宗雷[1] 

机构地区：[1]西南交通大学信息科学与技术学院,成都610031 [2]西南电子设备研究所电子信息控制重点实验室,成都610036

出　　处：《电子与信息学报》2013年第12期3041-3045,共5页Journal of Electronics & Information Technology

基　　金：国家973计划项目(2012CB315704);国家自然科学基金(61275068)资助课题

摘　　要：为了进一步提高近场目标的定位精度,该文提出一种将测得的相位差经解模糊算法后转化为时间差进行无源定位的方法,并建立了相应的近场测相定位模型。该模型中由近端阵元和通过光纤连接到中心处理单元的远端阵元形成分布式协同测量系统,解决了损耗和相位差模糊的问题,从而可以通过相位差测量来间接获得时差,最终实现对辐射源的快速精确定位。仿真结果表明该方法与直接测量时差的定位法相比,具有精度高、损耗低且布站容易的特点,在电子对抗领域具有一定的参考价值。In order to improve the positioning accuracy of near-field target, a passive location method is proposed by measuring the phase difference, which can be mapped into the time difference after solving the near-field fuzzy phase problem, and then a near filed location model is proposed based on phase measurement. The location model consists of nearby and remote sensor array that is connected with the central processing unit through optical fiber, thus the whole configuration works as a distributed measurement system. By overcoming the loss and fuzzy phase problem, then time difference can be obtained through phase difference indirectly. Such configuration could achieve accurate and quick location of the radiation source. Simulation results indicate that the proposed approach offers higher accuracy, lower loss and simplified large-area construction compared with the location scheme based on time-difference measurements. Therefore, it may find values in the field of electronic countermeasures.

关 键 词：近场无源定位 光纤网络 测时 测相 定位精度 

分 类 号：TN971[电子电信—信号与信息处理]