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时反法是一种新颖的自适应聚焦技术,它可以使声信号在未知环境下实现时空聚焦。海洋是一个复杂多变的信道,它会使信号波形在时域上发生畸变,能量在空间上发生扩散从而降低了声纳系统的检测能力。分析了时反法的原理,并进一步分析了时反法用于主动探测的过程。利用射线声学建立了浅海信道模型,对时反法主动探测技术进行了仿真分析。仿真结果表明,它可以使发生扩展的信号在时域上重新得到压缩,并使扩散的能量在目标处聚焦,从而实现对目标进行探测。
When the anti-law is a novel adaptive focusing technology, it can make acoustic signals in the unknown environment to achieve spatial and temporal focus. The ocean is a complex and ever-changing channel that distorts the signal waveform in the time domain and spatially disperses its energy to reduce the sonar system’s ability to detect. The principle of anti-France was analyzed, and the process of anti-France for active detection was further analyzed. The shallow sea channel model was established by ray acoustics, and the active anti-method active detection technology was simulated and analyzed. The simulation results show that it can make the extended signal be regressed in the time domain and focus the diffused energy at the target to detect the target.