Performance Evaluation of MIMO-OFDM Communication Systems
M. I. Youssef1, A. E. Emam2, M. ABD Elghany3

1Dr. M. I. Youssef, Professor, Al-Azhar University, Cairo – Egypt.
2Dr. A. E. Emam, Al-Azhar University, Cairo – Egypt.
3Er. M. ABD Elghany, Al-Azhar University, Cairo – Egypt. 

Manuscript received on 10 December 2017 | Revised Manuscript received on 18 December 2017 | Manuscript Published on 30 December 2017 | PP: 24-30 | Volume-7 Issue-2, December 2017 | Retrieval Number: B5238127217/17©BEIESP
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Abstract: This paper evaluates the bit error rate (BER) performance of MIMO-OFDM communication system. MIMO system uses multiple transmitting and receiving antennas with different coding techniques to either enhance the transmission diversity or spatial multiplexing gain. Utilizing alamouti algorithm were the same information is transmitted over multiple antennas in different time intervals and then collected again at the receivers to minimize the probability of error, combat fading and thus improve the received signal to noise ratio. While utilizing V-BLAST algorithm the transmitted signals are divided into different transmitting channels and transferred over the channel to be received by different receiving antennas to increase the transmitted data rate and achieve higher throughput. The paper provides a study for different diversity gain coding schemes and spatial multiplexing coding for MIMO systems. A comparison of varies channels estimation and equalization techniques are given. The simulation is implemented using MATLAB and the results had shown the performance of transmission models under different channel environments.
Keywords: Alamouti, BER, Channels, MIMO Communication, Space Codes, V-BLAST.

Scope of the Article: Wireless Communication