International Journal of Advanced Networking and Applications

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MIMO-OFDM Techniques for Wireless Communication System: Performance Evaluation Review


Affiliations
1 Department of Electrical and Electronic Engineering, ChukwuemekaOdumegwuOjukwu University, Uli, Nigeria., Nigeria
2 Electrical and Electronic Engineering, Auchi Polytechnic, Auchi, Nigeria., Nigeria
 

The use of multiple antennas in wireless communication systems has resulted in multiple channels that facilitate the speed of data transfer and improved channel capacity. This technique that basically involves multiple input and multiple output (MIMO) antennas helps to improve system performance by reducing bit error rate (BER) while increasing signal to noise ratio (SNR). Also, the use of orthogonal frequency division multiplexing (OFDM) has helped in mitigating inter-symbol interference (ISI). A combination of MIMO and OFDM produces the MIMO-OFDM scheme. This paper reviewed the performance of BER in MIMO-OFDM system considering various digital modulation techniques. An empirical review of previous studies on MIMO-OFDM system regarding BER performance evaluation was carried out. The study demonstrated the performance of digital modulation schemes in OFDM system with respect the Quadrature Amplitude Modulation (QAM). The results of the simulation based on MATLAB code revealed that lower order modulation yielded better BER performance than higher order. Furthermore,MIMO-OFDM system was modeled in MATLAB/Simulink and simulated to show that the use of multiple antennas at the transmitter and receiver helps in improving the performance of wireless communication system by reducing BER while increasing SNRconsidering two multipath channels – Rayleigh and Rician.

Keywords

Bit Error Rate, MIMO, MIMO-OFDM, OFDM, Signal to Noise Ratio.
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  • MIMO-OFDM Techniques for Wireless Communication System: Performance Evaluation Review

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Authors

C. N. Muoghalu
Department of Electrical and Electronic Engineering, ChukwuemekaOdumegwuOjukwu University, Uli, Nigeria., Nigeria
P. N. Achebe
Department of Electrical and Electronic Engineering, ChukwuemekaOdumegwuOjukwu University, Uli, Nigeria., Nigeria
F. A. Aigbodioh
Electrical and Electronic Engineering, Auchi Polytechnic, Auchi, Nigeria., Nigeria

Abstract


The use of multiple antennas in wireless communication systems has resulted in multiple channels that facilitate the speed of data transfer and improved channel capacity. This technique that basically involves multiple input and multiple output (MIMO) antennas helps to improve system performance by reducing bit error rate (BER) while increasing signal to noise ratio (SNR). Also, the use of orthogonal frequency division multiplexing (OFDM) has helped in mitigating inter-symbol interference (ISI). A combination of MIMO and OFDM produces the MIMO-OFDM scheme. This paper reviewed the performance of BER in MIMO-OFDM system considering various digital modulation techniques. An empirical review of previous studies on MIMO-OFDM system regarding BER performance evaluation was carried out. The study demonstrated the performance of digital modulation schemes in OFDM system with respect the Quadrature Amplitude Modulation (QAM). The results of the simulation based on MATLAB code revealed that lower order modulation yielded better BER performance than higher order. Furthermore,MIMO-OFDM system was modeled in MATLAB/Simulink and simulated to show that the use of multiple antennas at the transmitter and receiver helps in improving the performance of wireless communication system by reducing BER while increasing SNRconsidering two multipath channels – Rayleigh and Rician.

Keywords


Bit Error Rate, MIMO, MIMO-OFDM, OFDM, Signal to Noise Ratio.

References