NDLI: Detection of the presence of a narrowband communication signal in a fast fading Ricean channel

Content Provider	IEEE Xplore Digital Library
Author	Asher, Y. Messer, H.
Copyright Year	2000
Description	Author affiliation: Dept. of Electr. Eng.-Syst., Tel Aviv Univ., Israel (Asher, Y.)
Abstract	Detection of the presence of a narrow band, known communication signal of unknown amplitude, phase and Doppler shift in noise is usually based on matched filtering. If, however, the signal propagates through a multipath channel, causing a model miss match, such a procedure exhibit significant performance degradation. We study signal detection in a Ricean multipath channel. We first identify the conditions under which the conventional, quadrature matched filter detector exhibits significant performance degradation when used in a multipath environment. Then, we develop a generalized likelihood test (GLRT) detector for a narrow band constant modulus signal in a fast fading Ricean channel. We show that the resulting test statistic consists of an appropriate superposition of the quadrature matched filter output and the energy detector statistics. As such, the complexity of the new detector is about the same as the conventional one, while its performance in severe multipath conditions is much better.
Starting Page	238
Ending Page	244
File Size	302588
Page Count	7
File Format	PDF
ISBN	0780358422
DOI	10.1109/EEEI.2000.924379
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-04-11
Publisher Place	Israel
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Narrowband Detectors Matched filters Multipath channels Degradation Testing Statistical analysis Phase detection Doppler shift Noise level
Content Type	Text
Resource Type	Article

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