Spatial Spectrum Holes in Cognitive Radio With Relay Transmission

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Executive Summary

In this paper, the authors propose a relay-assisted transmission scheme in Cognitive Radio (CR) to exploit spatial spectrum holes, which are generated by relay techniques. The proposed scheme enables CR users to coexist with primary users at the same time in the same geographic area and spectrum band. Compared to conventional schemes, a higher spectrum efficiency is achieved by their method. They further analyze the successful communication probability and present numerical results to show advantages of their method.

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