Performance of an Improved Energy Detector in Multihop Cognitive Radio Networks

Cooperative spectrum sensing in a multihop cognitive radio (CR) network based on multiple antennas using an improved energy detector is studied in this paper. The improved energy detector uses the pth power of the absolute value of samples of primary user's (PU's) signals. The authors replace the conventional energy detector by an improved energy detector to enhance the performance of CR. Analytical expressions of the probability of false alarm and missed detection in each CR are derived. Furthermore, the authors extend the study to a multihop cooperative diversity system containing multiple multihop secondary transmission paths between the PU and the fusion center. Performance analysis of multihop cooperative diversity is discussed using an improved energy detector. The authors introduce a framework to derive a closed-form expression of the optimal number of multihop cooperative diversity branches by minimizing the total error rate. An efficient quick spectrum sensing algorithm is proposed, which requires fewer than the total number of cooperative multihop diversity branches. It is shown, through various numerical examples, that by using the optimal number of secondary transmission paths, it is possible to perform quick spectrum sensing while satisfying an upper bound on the total error rate.

• Record URL:
  https://doi.org/10.1109/TVT.2015.2401332
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00189545
• Supplemental Notes:
  • Abstract reprinted with permission of IEEE.
• Authors:
  • Singh, A
  • Bhatnagar, M R
  • Mallik, R K
• Publication Date: 2016-2

Language

• English

Media Info

• Media Type: Web
• Pagination: pp 732-743
• Serial:
  • IEEE Transactions on Vehicular Technology
  • Volume: 65
  • Issue Number: 2
  • Publisher: Institute of Electrical and Electronics Engineers (IEEE)
  • ISSN: 0018-9545
  • Serial URL: http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=25

Subject/Index Terms

• TRT Terms: Antennas; Detection and identification systems; Error analysis; Radio; Spread spectrum communications
• Subject Areas: Data and Information Technology; Highways;

Filing Info

• Accession Number: 01595096
• Record Type: Publication
• Files: TRIS
• Created Date: Mar 31 2016 9:32AM