Performance Enhancement of Decode and Forward Relaying Network in a Log- normal Fading Channel using Diversity Technique

Authors

Ojo Samson I
Ladoke Akintola University of Technology, Ogbomsoso, Nigeria
Abolade Robert O
Ladoke Akintola University of Technology, Ogbomsoso, Nigeria
Alagbe Oluwaseun L
Ladoke Akintola University of Technology, Ogbomoso
Ojerinde Idowu A
Bells University of Technology, Ota
Tooki Oluwaseun O
Electrical and Electronics Engineering Department, Air Force Institute of Technology (AFIT), Kaduna, Nigeria
DOI: https://doi.org/10.52549/ijeei.v12i2.3846
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Published: 28-04-2024 • Issue: Vol. 12 No. 2: June 2024 • Section: Regular paper

Abstract

The demand for wireless communication services is increasing daily due to several emerging applications of wireless communication system. However, the services provided by wireless communication is affected by obstruction along the path of propagation resulting in scattering of signal at the receiver. Decode and Forward (DF) relaying network used in addressing the problem also suffer from signal outage at the destination due to inability of relay to decode the transmitted signal at the relay node. Hence, in this paper, performance enhancement of DF relaying network is proposed using Time Diversity (TD) at the source with hybrid Threshold Combiner and Equal Gain Combiner (TC-EGC) at the destination. The various copies of the transmitted signal are received at the DF relay node to carry out relay selection by selecting relay with signal strength greater than the set threshold of 3 dB. The selected relays decode and re-encode the received signal before been propagated to the destination. The various copies of the signal received at the destination with varying paths ‘L’ (2, 3 and 4) are combined using TC-EGC. Mathematical expressions of Outage Probability (OP) and Bit Error Rate (BER) for the proposed technique are derived using Probability Density Function (PDF) of the signal received. The proposed DF technique is simulated using MATLAB R2018a and validated using OP and BER by comparing with the conventional DF cooperative relaying network. The proposed technique improved the performance of conventional DF cooperative relaying network with reduced BER and OP.
Keywords: Cooperative Diversity (CD) Decode and Forward (AF) Time Diversity (TD) Outage Probability (OP) Bit Error Rate (BER)

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Author Biographies

Ojo Samson I

Samson I. Ojo obtained the B. Tech and M. Tech degrees in Electronic and Electrical Engineering in 2011 and 2018, respectively, from Ladoke Akintola University of Technology (LAUTECH), Ogbomoso, Nigeria. He is a registered member of Council for the Regulation of Engineering in Nigeria (COREN). He obtained his Ph. D in communication Engineering in 2021 from Ladoke Akintola University of Technology (LAUTECH), Ogbomoso, Nigeria. His research interest is on signal processing, diversity and cognitive radio. presently, he’s a lecturer at the Department of Electronic and Electrical Engineering, LAUTECH, Ogbomoso.

Abolade Robert O

Robert O. Abolade received His B.Tech. and Ph.D degree in the Department of Electronic and Electrical Engineering, Ladoke Akintola University of Technology (LAUTECH), Ogbomoso, Nigeria. He obtained His M.Eng from Department of Electronic and Electrical Engineering, Obafemi Awolowo University Ile-Ife, Nigeria. He is a registered member of Council for the Regulation of Engineering in Nigeria (COREN) and member of the IEEE. His research interest is on signal processing in communications.

Alagbe Oluwaseun L

Oluwaseun L. Alagbe received his B.Tech from the Department of Electronic and Electrical Engineering, Ladoke Akintola University of Technology (LAUTECH), Ogbomoso, Nigeria in 2011. He is a registered member of Council for the Regulation of Engineering in Nigeria (COREN). Currently, his pursuing his M.Tech from the same Department. His research interest is in signal processing in wireless communication.

Ojerinde Idowu A
Idowu A. Ojerinde received his B.Tech and M.Tech from the Department of Electronic and Electrical Engineering, Ladoke Akintola University of Technology (LAUTECH), Ogbomoso. He is a lecturer at Bells University of Technology, Ota. He’s registered member of NSE and COREN. Presently, pursuing his Ph.D at the Ladoke Akintola University of Technology (LAUTECH), Ogbomoso. His research interest is on signal processing in wireless communication.
Tooki Oluwaseun O

Oluwaseun O. Tooki received his B.Tech., M.Tech., and Ph.D Degrees in Electronic and Electrical Engineering in 2010, 2017, and 2022, respectively, from Ladoke Akintola University of Technology (LAUTECH), Ogbomoso, Nigeria. He is a lecturer at the Electrical and Electronic Engineering Department, Air Force Institute of Technology (AFIT), Kaduna. He is a registered member of the Council for the Regulation of Engineering in Nigeria (COREN) and a corporate member of the Nigerian Society of Engineers (NSE). He worked in the Telecommunication industry between 2014 and 2019 and is experienced in optical transmission, network operations and deployment of optical communication equipment. His research interest includes wireless, optical and satellite communications.

How to Cite

[1]
O. S. I, A. R. O, A. O. L, O. I. A, and T. O. O, “Performance Enhancement of Decode and Forward Relaying Network in a Log- normal Fading Channel using Diversity Technique”, IJEEI, vol. 12, no. 2, pp. 255–265, Apr. 2024, doi: 10.52549/ijeei.v12i2.3846.