Filter-Banks for Ultra-Wideband for Communications, Sensing, and Localization

TL;DR

This paper explores the use of staggered multitone spread spectrum (SMT-SS), a form of filter-bank multicarrier spread spectrum, for ultra-wideband communications, emphasizing its spectral efficiency and suitability for sensing and localization.

Contribution

It introduces SMT-SS as a promising waveform for UWB, highlighting its spectral efficiency, flat PSD, and advantages over existing methods for communication, sensing, and localization.

Findings

SMT-SS offers good spectral efficiency for UWB.

It provides flat power spectral density, optimizing spectral mask usage.

SMT-SS enables precise sensing and localization through matched filtering.

Abstract

Recently, filter-bank multicarrier spread spectrum (FBMC-SS) has been proposed as a candidate waveform for ultra-wideband (UWB) communications, sensing, and localization. It has been noted that FBMC-SS is a perfect match to this application, leading to a trivial method of matching to the required spectral mask at different regions of the world. FBMC-SS also allows easy rejection of high-power interfering signals that may appear over different parts of the UWB spectral band. Moreover, passing the received signal through a matched filter provides precise information for sensing and localization. In this paper, we concentrate on the use of staggered multitone spread spectrum (SMT-SS) for UWB communications. SMT makes use of offset quadrature amplitude modulation (OQAM) to transmit data symbols over overlapping subcarrier bands. This form of FBMC-SS is well-suited to UWB communications because it has good spectral efficiency and a flat power spectral density (PSD), resulting in good utilization of the UWB spectral mask.