Theoretical Investigation of Different Diversity Combining Techniques in Cognitive Radio

Authors

  • Rupali Agarwal Babu Banarasi Das National Institute of Technology & Management
  • Neelam Srivastava Rajkiya Engineering College Kannauj image/svg+xml
  • Himanshu Katiyar Rajkiya Engineering College, Sonbhadra, Uttar Pradesh, India

DOI:

https://doi.org/10.26636/jtit.2018.124618

Keywords:

cognitive radio, complementary ROC, post examining selection, probability of detection, probability of false alarm, switch and examine combining

Abstract

In this paper, the performance of an energy detector in cognitive radio, using different diversity combining techniques, is evaluated. Among many diversity combining techniques, maximal ratio combining (MRC) gives the best results but at the cost of the highest complexity. To design a simpler receiver, it is suggested to use less complex combining techniques, i.e. switched diversity, which provides one of the least complex solutions to combat fading. The paper analyzes two switched diversity schemes, switch examine combining (SEC), and switch examine combining with post examining selection (SECp). A closed form expression determining the probability of detection using MRC, SEC and SECp is derived for various numbers of branches. Detection performance with different diversity combining techniques is compared and the complexity trade-off is observed.

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Submitted

2023-06-16

Published

2018-09-30

Issue

No. 3 (2018)

Section

ARTICLES FROM THIS ISSUE

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Copyright (c) 2018 Journal of Telecommunications and Information Technology

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This work is licensed under a Creative Commons Attribution 4.0 International License.

How to Cite

[1]
R. Agarwal, N. Srivastava, and H. Katiyar, “Theoretical Investigation of Different Diversity Combining Techniques in Cognitive Radio”, JTIT, vol. 73, no. 3, pp. 64–69, Sep. 2018, doi: 10.26636/jtit.2018.124618.