NDLI: On equal-gain combining for acquisition of time-hopping ultra-wideband signals

Content Provider	IEEE Xplore Digital Library
Author	Vijayakumaran, S. Wong, T.F.
Copyright Year	1972
Abstract	The acquisition of ultra-wideband (UWB) signals is a potential bottleneck for system throughput in a packet-based network employing UWB signaling format in the physical layer. The problem is mainly due to the low received signal power and the fine time resolution which forces the acquisition system to process the signal over long periods of time before getting a reliable estimate of the timing of the signal. Hence, there is a need to develop more efficient acquisition schemes by taking into account the signal and channel characteristics. In this paper, we investigate two approaches, the square-and-integrate and the integrate-and-square, which collect the energy in the multipaths by performing equal-gain combining (EGC) to improve the acquisition performance. We define the hit set as the set of hypothesized phases which can guarantee adequate system performance after acquisition, and also study the effect of the EGC window length on the acquisition performance.
Starting Page	479
Ending Page	490
Page Count	12
File Size	489304
File Format	PDF
ISSN	00906778
Volume Number	54
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-03-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Diversity reception Ultra wideband technology Signal processing Multipath channels AWGN Throughput Physical layer Signal resolution Power system reliability Timing ultra-wideband (UWB) Acquisition equal-gain combining (EGC) multipath channels serial search
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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