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Compressive Sparsity Order Estimation for Wideband Cognitive Radio Receiver
Sharma, Shree Krishna; Chatzinotas, Symeon; Ottersten, Björn
2014In Proceedings of IEEE International Conference on Communications (ICC)
Peer reviewed
 

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Keywords :
Sparsity Order Estimation; Compressive Sensing; Wideband Cognitive Radio
Abstract :
[en] Compressive Sensing (CS) has been widely investigated in the Cognitive Radio (CR) literature in order to reduce the hardware cost of sensing wideband signals assuming prior knowledge of the sparsity pattern. However, the sparsity order of the channel occupancy is time-varying and the sampling rate of the CS receiver needs to be adjusted based on its value in order to fully exploit the potential of CS-based techniques. In this context, investigating blind Sparsity Order Estimation (SOE) techniques is an open research issue. To address this, we study an eigenvalue based compressive SOE technique using asymptotic Random Matrix Theory. We carry out detailed theoretical analysis for the signal plus noise case to derive the asymptotic eigenvalue probability distribution function (aepdf) of the measured signal’s covariance matrix for sparse signals. Subsequently, based on the derived aepdf expression, we present a technique to estimate the sparsity order of the wideband spectrum with compressive measurements using the maximum eigenvalue of the measured signal’s covariance matrix. The performance of the proposed technique is evaluated in terms of normalized SOE Error (SOEE). It is shown that the sparsity order of the wideband spectrum can be reliably estimated using the proposed technique.
Disciplines :
Electrical & electronics engineering
Author, co-author :
Sharma, Shree Krishna ;  University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT)
Chatzinotas, Symeon  ;  University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT)
Ottersten, Björn ;  University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT)
External co-authors :
no
Language :
English
Title :
Compressive Sparsity Order Estimation for Wideband Cognitive Radio Receiver
Publication date :
June 2014
Event name :
IEEE International Conference on Communications (ICC)
Event organizer :
IEEE
Event place :
Sydney, Australia
Event date :
10-06-2014 to 14-06-2014
Audience :
International
Main work title :
Proceedings of IEEE International Conference on Communications (ICC)
Peer reviewed :
Peer reviewed
Available on ORBilu :
since 20 September 2014

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