Development of a Hybridized Diversity Combiner over Nakagami Fading Channel

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Author(s)

Zachaeus K. Adeyemo 1,* Samson I. Ojo 1 Simeon B. Ebinaiye 1 Olasunkanmi F. Oseni 1

1. Electronic and Electrical Engineering Department Ladoke Akintola University of Technology Ogbomoso, Nigeria

* Corresponding author.

DOI: https://doi.org/10.5815/ijieeb.2019.03.06

Received: 27 Jan. 2019 / Revised: 10 Feb. 2019 / Accepted: 20 Feb. 2019 / Published: 8 May 2019

Index Terms

Equal Gain Combining (EGC), Threshold Combining (TC), Hybridized TC-EGC, Outage Probability (OP), Processing Time (PT)

Abstract

Wireless communication system is of paramount importance in the world of telecommunication infrastructure and is expected to be a leading role in the development of a nation. However, the system is characterized by multipath propagation effects that lead to variability of the received signal thereby degrading the performance. Equal Gain Combiner (EGC) being used to address this problem is associated with hardware complexity that results in long processing time, while Threshold Combiner (TC) with low processing time has poor performance. Hence, in this paper, a hybridized Diversity Combiner (DC) consisting of EGC and TC, (TC-EGC) with a closed form expression over Nakagami fading channel is developed. TC-EGC is derived using the conventional EGC and TC at the receiver. Randomly generated bits used as source data are modulated using M-ary Quadrature Amplitude Modulation (M-QAM) and transmitted over Nakagami channel after filtering. The faded signals generated at varying paths ‘L’ (2, 3, 4) are scanned by TC to select the strongest paths. The outputs from the three TCs are combined by EGC to obtain the received signal which is converted to baseband through demodulation. A mathematical expression using the Probability Density Function (PDF) of Nakagami fading channel at varying paths ‘L’ for Outage Probability (OP) is also derived. The technique is simulated using Matrix Laboratory (version 7.2). The performance is evaluated using Signal-to-Noise Ratio (SNR), Outage Probability (OP) and Processing Time (PT). The study shows that the TC-EGC gives lower OP and PT values when compared with conventional EGC and TC, with reduction in hardware complexity. The TC-EGC developed can be used to enhance the performance of wireless communication system.

Cite This Paper

Zachaeus K. Adeyemo, Samson I. Ojo, Simeon B. Ebinaiye, Olasunkanmi F. Oseni, "Development of a Hybridized Diversity Combiner over Nakagami Fading Channel", International Journal of Information Engineering and Electronic Business(IJIEEB), Vol.11, No.3, pp. 45-53, 2019. DOI:10.5815/ijieeb.2019.03.06

Reference

[1]S.F. Abdel-Hakim. Performance Study of Nakagami-m Fading Channels with Correlated Unbalanced Branches, PhD Thesis Submitted to Jordan University of Science and Technology: 3-20. 2003.
[2]Z. K Adeyemo, and I.A. Ojedokun., EGC Receiver using Single Radio Frequency Chain and Single Matched Filter over Combined Rayleigh and Rician Fading Channels, ARPN Jorurnal of Engineering and Applied Sciences, 9(7): 992-994. 2014.
[3]Z. K Adeyemo and T. I. Raji “Effects of Diversity combining in mobile Terrestrial Environment” Continental Journal of Engineering Sciences 4(5): 27-37. 2010.
[4]A.J. Goldsmith “Wireless Communication” first Edition, Cambridge University press, Cambridge, England: 2005, pp 205-214.
[5]P.V. Hima and P. Seema Performance Analysis of Hybrid MRC/EGC Diversity Combining Technique over AWGN channel, IOSR Journal of Electronics and Communication Engineering 42(2):25-26. 2016.
[6]A. Hussien, Performance Analysis of Energy Detection Over Different Generalized Wireless Channel Based Spectrum Sensing in Cognitive Radio, PhD thesis submitted to Department of Electronic and Computer Engineering, Brunel University, London, United Kingdom. 2015, pp 34-37.
[7]S. Mohamed, and K.S. Marvin Performance of Coherent Receiver with Hybrid SC/MRC Over Nakagami-m Fading Channel, IEEE Transactions on Vehicular Technology 48(4):1155-1157. 1999.
[8]S. Nitika and S. Deepak Performance Analysis of Conventional Diversity Combining Schemes in Rayleigh Fading Channel, International Journal of Advanced Research in Computer Science and software Engineering 2(6):197-198. 2012.
[9]M. Paul, H.A. Matti., D. Guido and L. Lukas Antenna-Pattern Diversity Versus Space Diversity for Use at Handhelds, IEEE Transaction on Vehicular Technology 53(4) pp 1036-1037. 2004.
[10]J. G. Proakis,. “Digital Communications”, Mc Graw-Hill companies, inc., International Edition, 2001 pp 87:98.
[11]V. Ramanthan Performance Evaluation of Equal Gain Diversity Systems in Fading Channel, Master Thesis Submitted to the Faculty of the Virgiria Polytechnic, Institute and State University pp 1-4, 2003.
[12]T.S. Rappaport, “Wireless communications principle and practice, Even publishers Chicago. 2002, pp 240-250.
[13]S. Rupaban, Performance Analysis of Diversity Combining Receiver over Hoyt,δ-μ and k-μ Fading Channels, PhD thesis submitted to the Department of Technology, Guwahati, India, 2011, pp 45-68.
[14]M.K. Simon, and M.S. Alouini, “Digital Communication over fading channels second edition “John Wiley & Sons. Inc. Hoboken, New Jersey, 2004, pp 313-317.
[15]P.J. Suvarna and S.H. Vaibhav, Performance of Maximum Ratio Combining (MRC) MIMO Systems for Rayleigh Fading Channel, International Journal of Scientific and Research Publications, 3(2):1-3. 2013.
[16]G. L. Stuber, “Principles of Mobile Communications, “Second Edition, Kluwer Academic Publishers New York: 2002, pp 245-267.
[17]T. Taruna, and P. Bhumika., Multiple Detectors Based Analytical Performance of Spectrum Sensing, International Journal of Advanced Computer Research 4 (1), 95-98. 2014.
[18]T. Pratt, C. W. Boastian, and J.E. Allnutt., “Satellite Communications, “Second Edition, John Wiley & Sons, New Jersey. 2003, PP 34-67
[19]J. Islam, Performance Analysis of Diversity Technique for Wireless Communication System, Master Thesis Submitted to the Department of Technology Engineering, Blackline Institute of Technology. 2009, PP 50-54.
[20]A. Ibrahim, Performance of M-QAM Over Generalized Mobile Fading Channel Using MRC Diversity’, Master thesis Submitted to the department of Electrical Engineering, College of Engineering, King Saud University. 2007, PP 7-12.
[21]A. Annamalai and C Tellambura, “Performance evaluation of generalized selection Diversity Systems over Nakagami m fading channels”, Journal of Wireless Communications and Mobile Computing, 3(2): 99 – 116. 2003.
[22]A. Annamalai, Gantam Deora and C. Tallambura, Analysis of Generalized Selection Diversity Systems in Wireless Channel, IEEE Transactions on Vehicular Technology, 55(6):1765-1766. 2006.
[23]M. Shukla, G. Akanksha and B. Rinkoo, Performance Evaluation of Maximal Ratio Receiver Combining Diversity with Prime Interleaver for Iterative IDMA Receiver, Journal of Information Engineering and Application 1(3):29-33. 2011.
[24]L.J. Ippolito,., “Satellite communication system engineering: Atmospheric Effect, Satellite link Design, and System Performance,” first edition John Wiley & Sons, Singapore: 2008, PP 103-120.
[25]G. Rajkumar, Performance Evaluation of Maximum Ratio Combining Scheme in WCDMA System for different Modulation, International Journal of Emerging Technologies in Engineering Research 4(5), 2016, PP 240-242.
[26]K. Pavan, and T.R. thammi, FPGA Implementation of SRRC Filter for WCDMA Systems, International Journal of Science and Research 4 (3): 2582-2584. 2013.
[27]Jaherul, I. Performance Analysis of Diversity Techniques for Wireless Communication System, Journal of Wireless Communications and Mobile Computing, 12(4), 2012, pp 1-6.