Enhancement of Time-Reversal Subwavelength Wireless Transmission Using Pulse Shaping

TL;DR

This paper introduces a pulse shaping circuit-based time-reversal technique for subwavelength wireless transmission, eliminating complex structures and leveraging analog processing for improved channel discrimination.

Contribution

It presents a novel pulse shaping approach that simplifies subwavelength transmission systems and avoids digital processing issues, with experimental validation.

Findings

High channel discrimination achieved with proper PSC design

Elimination of complex electromagnetic structures in subwavelength transmission

Experimental demonstration with two receivers

Abstract

A novel time-reversal subwavelength transmission technique, based on pulse shaping circuits (PSCs), is proposed. Compared to previously reported approaches, this technique removes the need for complex or electrically large electromagnetic structures by generating channel diversity via pulse shaping instead of angular spectrum transformation. Moreover, the pulse shaping circuits (PSCs) are based on Radio Analog Signal Processing (R-ASP), and therefore do not suffer from the well-known issues of digital signal processing in ultrafast regimes. The proposed PSC time-reversal systems is mathematically shown to offer high channel discrimination under appropriate PSC design conditions, and is experimentally demonstrated for the case of two receivers.