Performance Evaluation of Multiple Input Multiple Output Orthogonal Frequency Division Multiplexing (Mimo-Ofdm) for Alamouti Space Time Block Code using Various Digital Modulation Techniques
Ijlal Hyder Rafiqi1, Javed Ashraf2, Mehboob ul Amin3, M.T Beg4, G.Mohiudin Bhat5
1Ijlal Hyder Rafiqi is Pursuing Master of Technology in Electronics & Communication at Al-Falah School of Engineering & Technology, Dhauj, Faridabad Haryana, India.
2Javed Ashraf is Working as Asst. Prof., in Department of Electronics & Communication Engineering at Al-Falah School of Engineering & Technology, Dhauj, Faridabad Haryana, India.
3Mehboob Ul Amin is Pursuing Phd in Post Graduate Department of Electronics & Instrumentation at University of Kashmir, India.
4Prof. M.T Beg is Head of the Department, Electronics & Communication Department, Jamia Milia Islamia, New Delhi, India.
5Prof. G.Mohiudin Bhat is Head of Department, Post Graduate Department of Electronics & Instrumentation at University of Kashmir, India.
Manuscript received on June 25, 2014. | Revised Manuscript received on July 03, 2014. | Manuscript published on July 05, 2014. | PP: 95-100 | Volume-4, Issue-3, July 2014. | Retrieval Number: C2312074314/2012©BEIESP
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© The Authors. Published By: Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: With the evolution in the telecommunication generations, more and more research is going on in the field of wireless communications. The purpose of these researches has always been to provide good network coverage across the region with higher data rates, accuracy and better performance. Control on coverage and performance has always been in focus and is achieved using better and better antennas. Several techniques are used to get good performance out of the antennas system. One impressive way is the usage of multiple antennas techniques. The approach is to transmit and receive more unique data on a single radio channel. To increase the diversity gain with the use of multiple input multiple output (MIMO), OFDM is a good technology used at the physical layer. It provides robustness to frequency selective fading, high spectral efficiency and low computational complexity. So MIMO-OFDM generates a good basis for 3GPP (3rd Generation Partnership Project) and 4G telecommunication technologies as well as other wireless communications systems. With MIMO-OFDM as basis, different standards like WiMAX (Wireless Interoperability for Microwave Access) and LTE (Long Term Evolution) have been implemented now. The use of OFDM has some limitations when it is considered for uplink like high peak to average power ratio (PAPR).High PAPR leads to increase in Bit Error rate of the system, thereby decreasing the system performance. In this paper we investigate the percentage error and capacity comparison by using different digital modulation schemes like: BPSK, QPSK, 16PSK, 4QAM and 8QAM, in the presence of AWGN and Rayleigh Noise over Rayleigh Fading channel.
Keywords: Multiple Input Multiple Output (MIMO), Orthogonal Frequency Division Multiplexing (OFDM) ,Space Time Block Coding (STBC), Signal Error Rate(SER),Signal-to-Interference-noise- ratio (SINR).