WSEAS Transactions on Communications
Print ISSN: 1109-2742, E-ISSN: 2224-2864
Volume 14, 2015
Detection of Spatially Distributed Signals by Generalized Receiver Using Radar Sensor Arrays
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Abstract: We consider a problem of detecting a random spatially distributed signal source by an array of sensors based on the generalized approach to signal processing (GASP) in noise. We derive some generalized receiver (GR) structures under several assumptions on the available statistics. The GR performance is evaluated and the effect of source angular spread is investigated. We notice the degrees of freedom of detection statistics distributions depend on both the signal angular spread and the number of data snapshots. At the high signal-to-noise ratio and with small degrees of freedom, increasing in angular spread improves the detection performance. With large degrees of freedom the increasing in angular spread reduces the detection performance. A comparison between GR and conventional beamformer is carried out by computer simulations. The results indicate a superiority of GR implementation as the angular spread becomes large over the conventional beamformer detector.
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Keywords: Generalized detector, distributed source, sensor array, generalized likelihood ratio test, adaptive coherence estimator detector, clutter, jamming
Pages: 186-203
WSEAS Transactions on Communications, ISSN / E-ISSN: 1109-2742 / 2224-2864, Volume 14, 2015, Art. #24