TitleGeneralized matched filter detector for fast fading channels
Publication TypeConference Paper
Year of Publication2012
AuthorsRomero, D, López-Valcarce, R, Leus, G
Conference NameIEEE Int. Conf. on Acoustics, Speech and Signal Processing (ICASSP 2012)
Date Published07/2012
Conference LocationKyoto, Japan
Keywordscognitive radio, dynacs, spectrum sensing
Abstract We consider the problem of detecting a known signal with constant magnitude immersed in noise of unknown variance,when the propagation channel is frequency-flat and randomlytime-varying within the observation window. A Basis ExpansionModel with random coefficients is used for the channel, and a Generalized Likelihood Ratio approach is adopted in order to cope with deterministic nuisance parameters. The resulting scheme can be seen as a generalization of the well-knownMatched Filter detector, to which it reduces for timeinvariantchannels. Closed-form analytical expressions are provided for the distribution of the test statistic under both hypotheses, which allow to assess the detection performance.