コグニティブ無線のための低演算量セキュア協調圧縮スペクトルセンシング(一般,有線/無線シームレスネットワーク,ハンドオーバ,リレー,分散,MIMO,モバイル・アドホックネットワーク,ユビキタス・センサネットワーク,一般)

概要

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In this paper, a reduced complexity cooperative cognitive radio spectrum sensing algorithm with enhanced security performance is proposed for wideband systems. The proposed algorithm aims to reduce the hardware complexity of the cognitive radio receiver by distributing the sensing work among a group of trustful nodes. To take a global decision about spectrum occupancy, each node uses its local sensing matrix, which is a part of a global sensing matrix at the fusion center to sense the wideband analog signal. The fusion center authenticates and rearranges the compressed data to formulate one global measurement vector which is used with a global sensing matrix to reconstruct an estimate of the wideband signal spectrum. The fusion center is protected against spectrum sensing data falsification attacks using an authentication algorithm that is inherent to the compressive sensing structure and requires neither data encryption nor extra overhead. Simulation results prove that the modified blindly optimized compressive sensing scheme achieves lower time complexity than the convention in the estimation process, while keeping almost the same receiver operating characteristics (ROC).
2012-07-12