Time Reversal With MISO for Ultrawideband Communications: Experimental Results

TLDR

Time reversal (TR) communications marks a paradigm shift in ultrawideband (UWB) communications, shifting system complexity from the receiver to the transmitter, and enabling UWB MISO through the TR scheme. The study employs short nanosecond UWB radio pulses to experimentally investigate two basic problems in TR‑enabled UWB MISO systems. The experiments confirm temporal focusing and increased collected energy with more antennas, and demonstrate for the first time the reciprocity of realistic channels, a cornerstone of TR.

Abstract

Time reversal (TR) communications marks a paradigm shift in ultrawideband (UWB) communications. The system complexity can be shifted from the receiver to the transmitter, which is ideal to some applications. UWB multiple input-single output (MISO) is enabled by the use of the TR scheme. Two basic problems are investigated experimentally using short UWB radio pulses (nanosecond duration). Temporal focusing and increase in collected-energy with the number of antennas are verified. Also, the reciprocity of realistic channels, the cornerstone of TR, is demonstrated perhaps for the first time in electromagnetics