二元阵被动时间反转镜定位技术研究

运用射线传播理论分析推导了二元被动时间反转镜定位技术的基本原理，得出了当模拟信道与实际信道建模误差不大时，时间反转镜实现了信道匹配、空间增益达到最大且实现了被动定位的结论；反之，信道匹配不好或不匹配，产生空间增益下降或没有空间增益的现象，影响到定位效果和定位精度．运用时间反转镜技术，进行了仿真信号和海试数据的分析处理，结果表明：该方法能实现目标被动定位，而且，对仿真数据处理的定位精度10km距离处达到数米以内，具有广阔的应用前景和研究价值．

Passive localization technology using time reversal with a two-sensor array

Time-reversal technology is a state-of-the-art passive localization technology that effectively achieves target detection and localization.This paper reviews the development and current status of time-reversal technology.The main principle of passive time-reversal technology with two sensing elements is then analyzed and further developed based on ray propagation theory.Theoretical analysis reveals that,when the error is not big between models of the actual channel and a simulated channel,the time-reversal mirror achieves channel matching,spatial gain reaches the maximum,and passive location is achieved.When time reversal technology was used to analyze simulation data and sea test data,the results indicate that the time-reversal technology is effective in target localization to within a few meters at a range of ten kilometers.