Journal of Network and Information Security

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Analysis the Performance of OFDM-MIMO Channel with Different Equalizers


Affiliations
1 Department of Computer Science and Engineering, Islamic University, Kushtia, Bangladesh
2 Department of Computer Science and Engineering, Islamic University, Kushtia, India
     

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The excellent efficiency, capacity, and dependability of todays wireless networks are concurrent to be achieved, and employing several communication methods antennas is an effective solution that has been extensively used. A communication system where both terminals are equipped with multi-antennas are referred to as MIMO systems, and when combined with OFDM technology are referred to as MIMO-OFDM. MIMO-OFDM has the ability to serve a large number of users with an enormous data transmission speed communication as well as utilizing the bandwidth efficiently. The aim of this simulation task explores three different equalization schemes in the MIMO flat fading channel, frequency-selective OFDM channel, and combined OFDM-MIMO wireless links on the bit error rate (BER) metric. Throughout the simulations, we modulate in 4-QAM (MIMO, OFDM-MIMO) and 16-QAM (OFDM) and observe BER performances for signal-to-noise ratio (SNR) up to 30. We find that given the specifications for OFDM as defined in IEEE 802.11a, precoding, and zero-forcing schemes in MIMO yield similar BER performances, while the MMSE scheme performs slightly worse at higher SNRs. Based on the equalization scheme, we assume perfect channel state information at the transmitter (CSIT) (for precoding) and the receiver (CSIR) (for zero-forcing and MMSE).

Keywords

CSIR, CSIT, Equalization, MIMO, OFDM, OFDM-MIMO.
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  • Analysis the Performance of OFDM-MIMO Channel with Different Equalizers

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Authors

Diponkor Bala
Department of Computer Science and Engineering, Islamic University, Kushtia, Bangladesh
Md. Shamim Hossain
Department of Computer Science and Engineering, Islamic University, Kushtia, Bangladesh
Md. Ibrahim Abdullah
Department of Computer Science and Engineering, Islamic University, Kushtia, India
Mohammad Alamgir Hossain
Department of Computer Science and Engineering, Islamic University, Kushtia, India

Abstract


The excellent efficiency, capacity, and dependability of todays wireless networks are concurrent to be achieved, and employing several communication methods antennas is an effective solution that has been extensively used. A communication system where both terminals are equipped with multi-antennas are referred to as MIMO systems, and when combined with OFDM technology are referred to as MIMO-OFDM. MIMO-OFDM has the ability to serve a large number of users with an enormous data transmission speed communication as well as utilizing the bandwidth efficiently. The aim of this simulation task explores three different equalization schemes in the MIMO flat fading channel, frequency-selective OFDM channel, and combined OFDM-MIMO wireless links on the bit error rate (BER) metric. Throughout the simulations, we modulate in 4-QAM (MIMO, OFDM-MIMO) and 16-QAM (OFDM) and observe BER performances for signal-to-noise ratio (SNR) up to 30. We find that given the specifications for OFDM as defined in IEEE 802.11a, precoding, and zero-forcing schemes in MIMO yield similar BER performances, while the MMSE scheme performs slightly worse at higher SNRs. Based on the equalization scheme, we assume perfect channel state information at the transmitter (CSIT) (for precoding) and the receiver (CSIR) (for zero-forcing and MMSE).

Keywords


CSIR, CSIT, Equalization, MIMO, OFDM, OFDM-MIMO.

References