电磁信号时间反演的实现方法研究进展

摘要

Two kinds of methods for implementing time reversal of electromagnetic signals in time domain based on digital signal processing and analog signal processing are introduced and discussed. The former technique can directly sample and process time domain signal, or use phase conjugation in frequency domain, to implementing time reversal of electromagnetic signals; while the other technique is based on the principle of temporal-imaging to implement time reversal of electromagnetic signals in time domain, including two schemes of microwave photonics technology and fully electronic technology.%讨论了基于数字信号处理技术和模拟信号处理技术实现时域电磁信号时间反演的两类方法.前者可以直接对时域信号进行采样处理或通过在频域中进行相位共轭变换,实现时域信号时间反演；后者基于时域成像原理实现时域电磁信号的时间反演处理,包括微波光子技术和全电子技术两种方案.