One-bit Time Reversal for WLAN Applications

Abstract

Time reversal (TR) is a technique that can achieve remarkable temporal focusing (delay spread reduction) and spatial focusing (low spatial interference) in the context of wideband multiple/ single input-single output systems. In this paper, we investigate a simpli ed form of time-reversal, referred to as one-bit time reversal. The ef ciency of this technique has already been demonstrated for ultrasound applications. We apply it to radio waves and demonstrate that it can preserve the spatial focusing properties of TR, while requiring much simpler transmit Iters. However, it does not have as good temporal focusing properties as pure TR.