Power-Efficient Ultra-Wideband Waveform Design Considering Radio Channel Effects

TL;DR

This paper introduces a convex optimization-based method for designing power-efficient ultra-wideband waveforms that account for radio channel effects and regulatory emission masks, enhancing transmitted power while mitigating channel losses.

Contribution

It proposes a novel FIR filter-based waveform design approach that incorporates radio channel effects into power spectrum optimization under regulatory constraints.

Findings

Maximizes transmitted UWB power within emission masks

Mitigates power loss due to channel attenuation

Demonstrates improved power efficiency through simulations

Abstract

This paper presents a power-efficient mask-constrained ultra-wideband (UWB) waveform design with radio channel effects taken into consideration. Based on a finite impulse response (FIR) filter, we develop a convex optimization model with respect to the autocorrelation of the filter coefficients to optimize the transmitted signal power spectrum, subject to a regulatory emission mask. To improve power efficiency, effects of transmitter radio frequency (RF) components are included in the optimization of the transmitter-output waveform, and radio propagation effects are considered for optimizing at the receiver. Optimum coefficients of the FIR filter are obtained through spectral factorization of their autocorrelations. Simulation results show that the proposed method is able to maximize the transmitted UWB signal power under mask constraints set by regulatory authorities, while mitigating the power loss caused by channel attenuations.