DOI: 10.3724/SP.J.1146.2013.00341

Journal of Electronics & Information Technology (电子与信息学报) 2013/35:12 PP.3041-3045

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

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.

Key words:Near-field passive localization,Optical fiber network,Time measurement,Phase measurement,Positioning accuracy

ReleaseDate:2014-07-21 17:01:13