JOURNAL OF SCIENCE TECHNOLOGY AND EDUCATION 9(1), MARCH, 2021 ISSN: 2277-0011; Journal homepage: www.atbuftejoste.com Corresponding author: Saminu, S. sansam4k@gmail.com Biomedical Engineering Department, University of Ilorin, Nigeria. © 2020. Faculty of Tech. Education, ATBU Bauchi. All rights reserved 257 Performance Comparison of Transmit and Receive Diversity under Rayleigh Faded Channel Using Extended Alamouti’s Scheme 1,2 Sani Saminu, 3 Adamu Halilu Jabire, 1 Yusuf Kola Ahmed, 4 Adamu Mohammed Jajere, 2 Isah Salim Ahmad 1 Biomedical Engineering Department, The University of Ilorin-Nigeria. 2 School of Electrical Engineering, Hebei University of Technology, Tianjin-China 3 Dept. of Electrical & Electronics Engineering, Taraba State University School of Microelectronics, Tianjin University, Tianjin, P.R. China ABSTRACT Diversity techniques have been used over the years to improve the wireless communication links, mitigate fading, achieve higher data rates, and improve channel capacity gains. This paper presents the comparative analysis of transmitting and receive diversity techniques with our proposed extended Alamouti’s scheme using orthogonal space-time block codes (OSTBC) under the Rayleigh faded channel. In this paper, three possible diversity configurations have been considered: multiple-input multiple-output (MIMO), single-input multiple outputs (SIMO), and multiple-input single-output (MISO). The model was developed in a Matlab environment and performance comparison was carried out using BER vs SNR. Our proposed model proved that the MIMO system is highly efficient in improving wireless communication links. Also, our proposed transmit diversity scheme with a higher number of antenna arrays achieves full diversity as in receive combining schemes. INTRODUCTION The highly increasing demands in today’s wireless communication system and migration of new generations in mobile networks coupled with the integration of internet and multimedia applications such as high-quality multimedia services, easy and efficient internet accessibility, and 3D qualitative animation games among others posed several challenges in the wireless communication system. Satisfying these ever-increasing demands within the limited radio spectrum, multipath fading channels, and interference is a great challenge and difficult task [1]. Therefore, over the years modern wireless communication has been passing through several improvements with the addition of more new services that changes and improves our lifestyle. Several works have been carried out by researchers on diversity techniques by using an array of smart antennas at the receiver and/or the transmitter. This technique proved to be effective and one of the efficient methods for improving the efficiency of the wireless system in multipath fading channels. Diversity can be achieved either at the receiver termed as receive diversity or at transmitter known as transmit diversity. If the array of antennas were deployed at the receiver while a single antenna is used at the transmitter, the configuration is known as single input multiple outputs (SIMO). With ARTICLE INFO Article History Received: August, 2020 Received in revised form: October, 2020 Accepted: January, 2021 Published online: March, 2021 KEYWORDS Diversity Techniques; SIMO; MIMO; MISO; OSTBC; MRC