• ISSN 0258-2724
  • CN 51-1277/U
  • EI Compendex
  • Scopus
  • Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
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Volume 28 Issue 1
Jan.  2015
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Article Contents
LIU Xin, ZHONG Weizhi. Optimization and Performance Analysis for Bandwidth Spectrum Sensing in Cognitive Radio[J]. Journal of Southwest Jiaotong University, 2015, 28(1): 66-71. doi: 10.3969/j.issn.0258-2724.2015.01.010
Citation: LIU Xin, ZHONG Weizhi. Optimization and Performance Analysis for Bandwidth Spectrum Sensing in Cognitive Radio[J]. Journal of Southwest Jiaotong University, 2015, 28(1): 66-71. doi: 10.3969/j.issn.0258-2724.2015.01.010

Optimization and Performance Analysis for Bandwidth Spectrum Sensing in Cognitive Radio

doi: 10.3969/j.issn.0258-2724.2015.01.010
  • Received Date: 26 Nov 2013
  • Publish Date: 25 Feb 2015
  • To decrease interference to primary user (PU) in cognitive radio (CR), a bandwidth spectrum sensing model of secondary user (SU) over the whole frame was built through dividing the communication bandwidth into sensing frequency band and transmission frequency band, according to the status variation of PU. In this model, SU uses part of the bandwidth to perform spectrum sensing and the rest to transmit data in a frame. Subject to the constraints of the interference to PU and the false alarm probability of SU, the spectrum efficiency of SU was maximized through jointly optimizing sensing bandwidth proportion and detection probability. Using the MATLAB software to simulate the interference probability and the spectrum efficiency, it is found that compared to the conventional time spectrum sensing, the bandwidth spectrum sensing decreases the interference probability to PU by 30% with the false alarm probability of 0.5, and improves the spectrum efficiency of SU by 0.3 (bit/s)/Hz with the interference probability of 0.2.

     

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