Distributed Compressive Spectrum Sensing in Cooperative Multihop Cognitive Networks

In wideband Cognitive Radio (CR) networks, spectrum sensing is an essential task for enabling dynamic spectrum sharing, but entails several major technical challenges: very high sampling rates required for wideband processing, limited power and computing resources per CR, frequency-selective wireless fading, and interference due to signal leakage from other coexisting CRs. In this paper, a cooperative approach to wideband spectrum sensing is developed to overcome these challenges. To effectively reduce the data acquisition costs, a compressive sampling mechanism is utilized which exploits the signal sparsity induced by network spectrum under-utilization.

Provided by: Institute of Electrical and Electronics Engineers Topic: Mobility Date Added: Feb 2011 Format: PDF

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