Cooperative spectrum sensing with noisy hard decision transmissions

Aysal, T, Sithamparanathan, K and Piesiewicz, R 2009, 'Cooperative spectrum sensing with noisy hard decision transmissions', in International Conference on Communications (IEEE ICC 2009), New Jersey, USA, 14-18 June 2009, pp. 2738-2742.


Document type: Conference Paper
Collection: Conference Papers

Title Cooperative spectrum sensing with noisy hard decision transmissions
Author(s) Aysal, T
Sithamparanathan, K
Piesiewicz, R
Year 2009
Conference name International Conference on Communications (IEEE ICC 2009)
Conference location New Jersey, USA
Conference dates 14-18 June 2009
Proceedings title International Conference on Communications (IEEE ICC 2009)
Publisher IEEE
Place of publication New Jersey, USA
Start page 2738
End page 2742
Total pages 5
Abstract Most critical component of the cognitive radio paradigm is spectrum sensing and accordingly, detection of primary users. Recently proposed cooperative spectrum sensing methods do not consider errors occurring during the transmission of local cognitive radio decisions to the cognitive base station. However, perfect communication is clearly not the case in realistic cooperative spectrum sensing scenarios and might lead to misleading performance result interpretations. In this paper, we extend the simple cooperative spectrum sensing communication model to admit transmission imperfections. Specifically, we consider the case where the local hard cognitive radio decisions that are based on any local detection scheme are corrupted by additive noise during transmission from cognitive radios to cognitive base station. Utilizing this extended cooperative spectrum sensing model, we present the complex optimal and a practical and effective suboptimal detector that is capable of operating with any local cognitive radio detection scheme: Two-step detector. We present simulation results investigating the performance of the proposed detectors and the effect of parameters of interest such as number of cognitive radios and signal to noise ratio. Moreover, we provide comparisons between non-cooperative and cooperative spectrum sensing performances revealing some cases where non-cooperative scheme is more effective.
DOI - identifier 10.1109/ICC.2009.5198863
Copyright notice ©2009 IEEE
ISBN 9781424434343
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