Low-power IR-UWB coherent TOA estimators with suboptimal sinusoidal templates for UWB-based body area networks

Authors:
Mohamad Abou El-Nasr;Heba A. Shaban;R. Michael Buehrer
Affiliations:
Department of Computer Engineering, Arab Academy for Science, Technology & Maritime Transport (AASTMT), Alexandria, Egypt;Department of Electronics and Communications Engineering, Arab Academy for Science, Technology & Maritime Transport (AASTMT), Alexandria, Egypt;The Bradley Department of Electrical and Computer Engineering, Virginia Tech University, Blacksburg, USA 24061 and Wireless@Virginia Tech Research Group, Blacksburg, USA 24061
Venue:
Wireless Networks
Year:
2011

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Abstract

In this article, we propose and study the performance of low-power impulse radio ultra-wideband correlation-based time-of-arrival (TOA) estimators for body area networks. In particular, we study and compare the signal-to-noise-ratio degradation of TOA correlator-based estimators assuming optimal, real and complex suboptimal sinusoidal templates. Moreover, we study the improved Ziv-Zakai lower bound for complex suboptimal-template based TOA estimators. Then, we study and compare the performance of practical correlator-based TOA estimators using optimal, real and complex suboptimal sinusoidal templates via simulations in the IEEE 802.15.6a UWB on-body channel model as well as actual on-body measurements. The performance of real suboptimal template-based estimators approaches the performance of optimal TOA estimators based on simulations and actual measurements. We show that low-power is traded for a minimal performance loss.