GENERALIZED LIKELIHOOD-RATIO DETECTION OF MULTIPLE-HOP FREQUENCY-HOPPING SIGNALS

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Title:	GENERALIZED LIKELIHOOD-RATIO DETECTION OF MULTIPLE-HOP FREQUENCY-HOPPING SIGNALS
Authors:	CHUNG,CD
Contributors:	電機工程研究所
Keywords:	SPREAD-SPECTRUM SIGNALS
Date:	1994
Issue Date:	2010-06-29 20:24:13 (UTC+8)
Publisher:	中央大學
Abstract:	A noncoherent, soft-decision combining processor for the multiple-hop detection of frequency-hopping signals is developed, based on a generalised likelihood-ratio test argument. Hop rate, hop transition times, and the set of candidate carrier frequencies are assumed to be known throughout. The proposed receiver has a simple structure: it consists of a bank of per-hop envelope detectors, a per-hop 'select-the-maximum' operation, a soft-decision accumulator over hops, and a final threshold comparison. For a large number of observed signal hops, this receiver is analysed on the basis of a Gaussian, central-limit theorem type of argument for the decision statistic. A simple formula that relates the detection probability, the false alarm probability, and the signal-to-noise ratio is derived and found adequate for performance purposes. This line of analysis is well supported by extensive simulation. It is shown analytically that the performance of the soft-decision receiver is better than the noncoherent hard-decision combining receiver, which is typically referred to in the literature as the 'multiple-hop maximum-likelihood receiver'.
Relation:	IEE PROCEEDINGS-COMMUNICATIONS
Appears in Collections:	[Graduate Institute of Electrical Engineering] journal & Dissertation

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