Abstract: In certain embodiments, a system for transmitting (electromagnetic or acoustic) wave-based signals towards a target includes a plurality of transceivers and a controller. Each transceiver transmits a probe signal towards the target and receives an associated backscatter signal corresponding to reflection of the probe signals from the target. The controller determines, for each transceiver, a Doppler frequency shift and a time delay, modifies each associated backscatter signal based on the corresponding Doppler frequency shift and time delay to generate an associated motion-compensated backscatter signal, and applies time reversal (TR) processing to each motion-compensated backscatter signal to generate an associated motion-compensated TR signal. Each transceiver transmits towards the target a transmission signal based the associated motion-compensated TR signal. In communications systems, the transmission signals are data-modulated versions of the motion-compensated TR signals.

Abstract: A method of generating a high-power Radio-Frequency ultrashort waveform comprising the steps of generating an input waveform at a relatively low power level from an impulse response characteristic of a reverberant cavity via one-bit quantization and time reversal; generating an amplified input waveform of a power higher than the input waveform via feeding the input waveform into one or more amplifiers; generating a compressed ultrashort pulse having a high power relative to the amplified input waveform via feeding the amplified input waveform into the reverberant cavity.

Abstract: In certain embodiments, a system for transmitting (electromagnetic or acoustic) wave-based signals towards a target includes a plurality of transceivers and a controller. Each transceiver transmits a probe signal towards the target and receives an associated backscatter signal corresponding to reflection of the probe signals from the target. The controller determines, for each transceiver, a Doppler frequency shift and a time delay, modifies each associated backscatter signal based on the corresponding Doppler frequency shift and time delay to generate an associated motion-compensated backscatter signal, and applies time reversal (TR) processing to each motion-compensated backscatter signal to generate an associated motion-compensated TR signal. Each transceiver transmits towards the target a transmission signal based the associated motion-compensated TR signal. In communications systems, the transmission signals are data-modulated versions of the motion-compensated TR signals.

Abstract: A method of generating a high-power Radio-Frequency ultrashort waveform comprising the steps of generating an input waveform at a relatively low power level from an impulse response characteristic of a reverberant cavity via one-bit quantization and time reversal; generating an amplified input waveform of a power higher than the input waveform via feeding the input waveform into one or more amplifiers; generating a compressed ultrashort pulse having a high power relative to the amplified input waveform via feeding the amplified input waveform into the reverberant cavity.