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Performance Analysis of Optimum Combining Under the Impact of Multiple Primary Interferers in Underlay Cognitive Radios


Affiliations
1 Department of Electronics and Communication Engineering, Thapar University, Patiala, 147001, India
 

This paper investigates the performance of optimum combining (OC) in underlay cognitive radio (CR) in the presence of multiple primary user's transmitters (PUT-xs) in flat Rayleigh fading channels. The number of PUT-xs 𝐿𝑑 and antennas at secondary user receiver (SU-Rx) 𝐾r are related as 𝐿𝑑 β‰₯ πΎπ‘Ÿ. Closed form expressions are obtained for the ergodic capacity and average bit error rate (BER) of the CR-OC system. Analytical results are validated through simulations. Performance of proposed system is compared with the Maximal ratio combining (MRC) in cognitive radio (CR-MRC).

Keywords

Average Bit Error Rate, Cognitive Radio, Ergodic Capacity, Maximal Ratio Combining, Optimum Combining.
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  • Andrews, L. C. (1985). Special Functions for Engineers and Applied Mathematicians, New York: Macmillan.

  • Duan, R., Elmusrati ,M., Jantti , R., & Virrankoski, R.(2010). Capacity for spectrum sharing cognitive radios with MRC diversity at the secondary receiver under asymmetric fading. In Proc. IEEE Global Telecommun. Conf., 1–5.

  • Gastpar, M.(2004) .On capacity under receivedsignal constraints. In 42nd Annual Allerton Conf.

  • Communication, Control Comput., (pp.1322-1331).

  • Ghasemi, A., & Sousa, E. S. (2007). Fundamental limits of spectrum-sharing in fading environments.

  • IEEE Trans. Wireless Commun., 6(2), 649-658.

  • Goldsmith, A. J. (2005). Wireless Communications, New York: Cambridge University Press.

  • Gradshteyn, I.S., & Ryzhik, I. M. (1980).Table of Integrals, Series and Products. New York: Academic

  • Huang, Y.(2014).Outage performance of spectrum sharing systems with MRC diversity under multiple primary user’s interference. IEEE Commun. Lett., 18(4), 576-559.

  • Lee, D. Performance analysis of scheduled cognitive radio systems with MIMO transmission.

  • IEEE Trans. Wireless Commun., 62(8), 4088-4093.

  • Mitola, J.,& Maguire, G. Q.(1999) .Cognitive radio: making software radios

  • more personal. IEEE Personal Commun., 6(4), 13-18.

  • Papoulis, A. (1986). Probability, Random Variables, and Stohastic Processes. New York: McGraw Hill Book Company.

  • Shah, A., Haimovich, A. M. (1998). Performance analysis of optimum combining in wireless communications with Rayleigh fading and cochannel interference. IEEE Trans. Commun., 46(4), 473-479.

  • Simon, M.K., & M.-S Alouini(2005).Digital Communication over Fading Channels. New Jersey, Wiley,

  • Winters, J.H.(1984) .Optimum combining in digital mobile radio with cochannel Interference. IEEE Trans. Wireless Commun., 33(3), 144-155.


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  • Performance Analysis of Optimum Combining Under the Impact of Multiple Primary Interferers in Underlay Cognitive Radios

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Authors

Rupinder Kaur
Department of Electronics and Communication Engineering, Thapar University, Patiala, 147001, India
Kavita Vij
Department of Electronics and Communication Engineering, Thapar University, Patiala, 147001, India
Surbhi Sha
Department of Electronics and Communication Engineering, Thapar University, Patiala, 147001, India

Abstract


This paper investigates the performance of optimum combining (OC) in underlay cognitive radio (CR) in the presence of multiple primary user's transmitters (PUT-xs) in flat Rayleigh fading channels. The number of PUT-xs 𝐿𝑑 and antennas at secondary user receiver (SU-Rx) 𝐾r are related as 𝐿𝑑 β‰₯ πΎπ‘Ÿ. Closed form expressions are obtained for the ergodic capacity and average bit error rate (BER) of the CR-OC system. Analytical results are validated through simulations. Performance of proposed system is compared with the Maximal ratio combining (MRC) in cognitive radio (CR-MRC).

Keywords


Average Bit Error Rate, Cognitive Radio, Ergodic Capacity, Maximal Ratio Combining, Optimum Combining.

References