Distributed detection in UWB wireless sensor networks

Authors:
Kai Bai;Cihan Tepedelenlioǧlu
Affiliations:
Qualcomm, San Diego, CA and Department of Electrical Engineering, Fulton School of Engineering, Arizona State University, Tempe, AZ;Department of Electrical Engineering, Fulton School of Engineering, Arizona State University, Tempe, AZ
Venue:
IEEE Transactions on Signal Processing
Year:
2010

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Abstract

In this paper, we study distributed detection in ultra-wideband (UWB) wireless sensor networks (WSNs) over frequency selective channels. Several schemes with different requirements on channel state information (CSI) are proposed, analyzed, and compared. We study the error exponent and asymptotic optimality for these schemes under different energy, and time-bandwidth product requirements. Our study shows that to achieve a nonzero error exponent, the no-feedback scheme requires large energy and time-bandwidth product but has advantages of no synchronization requirement and no feedback overhead. On the other hand, schemes requiring feedback are suitable for energy and bandwidth limited settings but require quasi-synchronization.