Optimization of Spectrum Sensing Time in a Cooperative Cognitive Radio

A. M. S. Tekanyi, J. Raymond, A. D. Usman

Abstract


The practical application of Cognitive Radio (CR) is to address the problem of spectral Radio Frequency (RF) under-utilization for wireless communications. One of the basic operation of the CR is the spectrum sensing. This task is associated with challenges of accuracy of detection as a result of Hiding Terminal Problem (HTP) and collision between Secondary Users (SUs) during data transmission process when there is no channel controller. The Cooperative Spectrum Sensing (CSS) deployed to mitigate the HTP, also introduces an additional communication overhead as a result of long sensing and reporting times. The longer the sensing time the more the communication overhead. The reduction in the communication overhead reduces the Total Error Rate (TER). In turn, when the TER is reduced the throughput is automatically increased. This paper presents the optimization of Spectrum Sensing Time in a cooperative CR Network and proposes a better way of achieving an improved Spectrum Sensing Time to efficiently utilize the RF spectrum.

 


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References


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