Time reversal

"TIME-REVERSED ACOUSTICS"

1999, Scientific American

https://www.jstor.org/stable/26058488

(Please refer to the first paragraph)

Related scientific article: https://www.researchgate.net/publication/224026006_Time-reversed_acoustics

Time Reversal in MIMO Radar

When targeting becomes stronger after each iteration (in each back-and-forth) as the transmitted waveform is adapted to the target and the environment and therefore becomes optimal. Improvement of signal-to-noise ratio.

Radar waveform - adaptive transmission scheme