Near-field Passive Location Technology Based on Phase Measurements among Distributed Fiber Sensor Nodes
Peng Yu-lan① Yan Lian-shan① Zhou Tao② Li Wen-liang② Li Zong-lei①
①(School of Information Science & Technology, Southwest Jiaotong University, Chengdu 610031, China) ②(Key Laboratory of Electronic Information Control, Southwest China Research Institute of Electronic Equipment, Chengdu, 610036, China)
Abstract：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.
2013, Vol. 35 
