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研究了有PS(Probe Source)源发-收时间反转在强混响背景下对掩埋目标的检验问题。所提出的发-收互动时反处理是:在目标处放一个PS声源产生引导信号,SRA(source Receiver Array)接收引导信号,并对接收到的信号做物理时反(即多路径补偿反波束形成),将声能聚焦在目标位置处,对SRA接收到的目标散射回波做与发射聚焦互动的接收聚焦(即多路径补偿波束形成),得到聚焦后的目标回波,实现发-收互动的聚焦。并对常规BS(Broadside)发射检测(没有时间反转)和时间反转检测两种方法各自的性能进行了比较。实验室波导掩埋目标实验数据处理验证了理论分析的结论,并证明时间反转检测比常规BS发射检测可得到更大的信混比,从而提高了掩埋目标的检测概率。
The probing problem of the source-receiver time-of-source inversion with PS (Probe Source) in the background of strong reverberation is studied. The proposed de-interoperation anti-processing is: putting a PS sound source at the target to generate the pilot signal, SRA (source Receiver Array) receiving the pilot signal, and the received signal is physically back-reversed (ie, multipath compensation Beamforming) to focus the sound energy at the target position, and perform a receive focusing (ie, multi-path compensation beamforming) on the target scattering echo received by the SRA in a focusing interaction with the transmitting beam to obtain a focused target echo, Interactive focus. The performances of the two methods of conventional BS (Broadside) transmit detection (no time reversal) and time reversal detection are compared. The experimental data processing of laboratory waveguide buried target verifies the conclusion of theoretical analysis and proves that the time-reversed detection can achieve a larger signal-to-interference ratio than the conventional BS emission detection, thus improving the detection probability of the buried target.