Cooperative Multiband Joint Detection With Correlated Spectral Occupancy in Cognitive Radio Networks | IEEE Journals & Magazine | IEEE Xplore

Cooperative Multiband Joint Detection With Correlated Spectral Occupancy in Cognitive Radio Networks


Abstract:

In this paper, a frequency-coupled optimum linear energy combiner (OLEC) structure, recently proposed for single user scenarios, is generalized to multiple users and inte...Show More

Abstract:

In this paper, a frequency-coupled optimum linear energy combiner (OLEC) structure, recently proposed for single user scenarios, is generalized to multiple users and integrated into the spatial-spectral joint detection framework introduced by Quan , to take further advantage of subband occupancy correlation in cooperative wideband spectrum sensing. In particular, the design of the detection thresholds and fusion weights used by a bank of subband multiuser OLECs is formulated as a joint optimization problem, i.e. maximization of aggregate opportunistic throughput under interference constraints (or vice versa). Through numerical experiments with a Markov model of subband occupancy, the proposed scheme is shown to significantly enhance CR network performance in terms of these global metrics.
Published in: IEEE Transactions on Signal Processing ( Volume: 60, Issue: 5, May 2012)
Page(s): 2682 - 2687
Date of Publication: 13 February 2012

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