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Cooperative Spectrum Sensing with Distance Based Weight for Cognitive Radio Systems  

Lee, So-Young (Kwangwoon University)
Lee, Jae-Jin (Soongsil University)
Kim, Jin-Young (Kwangwoon University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.47, no.7, 2010 , pp. 45-50 More about this Journal
Abstract
In this paper, we analysis the performance of cooperative spectrum sensing with distance based weight for cognitive radio (CR) systems and CR systems sense the spectrum of the licensed user by using a energy detection method. Threshold is determined in accordance with the constant false alarm rate (CFAR) algorithm for energy detection. The signal of licensed user is OFDM signal and the wireless channel between a licensed user and CR systems is modeled as Gaussian channel. From the simulation results, the cooperative spectrum sensing with distance based weight combining (DWC) and equal gain combing (EGC) methods shows higher spectrum sensing performance than single spectrum sensing does. And the detection probability performance with the DWC is higher than that with the EGC.
Keywords
Cognitive radio(CR); cooperative spectrum sensing; energy detection; equal gain combining(EGC); distance based weight combining(DWC);
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