BER Analysis of MIMO-OFDM System using Different Equalization Techniques under Multipath Fading Channels for Different Modulations
Jagdish Patel1, Rana Mahajan2, Manohar Wagh3
1Jagdish Patel, Department of Electronics and Telecommunication Engineering Sandip Institute of Technology and Research Centre, Nashik (M.H), India.
2Rana Mahajan, Department of Electronics and Telecommunication Engineering Sir Visvesvaraya Institute of Technology, Nashik (M.H), India.
3Manohar Wagh, Department of Electronics and Telecommunication Engineering Sandip Institute of Technology and Research Centre, Nashik (M.H), India.
Manuscript received on November 21, 2014. | Revised Manuscript received on December 03, 2014. | Manuscript published on December 30, 2014. | PP: 209-213 | Volume-4 Issue-2, December 2014. | Retrieval Number: B3670124214/2013©BEIESP
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© The Authors. 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 rapid growth of digital communication in recent years, the need for high speed data transmission is increased. OFDM is a promising solution for achieving high data rates in mobile environment, due to its resistance to ISI, which is a common problem found in high speed data communication. A multiple-input multiple-output (MIMO) communication System combined with the orthogonal frequency division multiplexing (OFDM) modulation technique can achieve reliable high data rate transmission over broadband wireless channels. MIMOOFDM system has been currently recognized as one of the most competitive technology for 4G mobile wireless systems.. In this paper we discuss the BER performance of the MIMO-OFDM system with two different equalizers (ZF and MMSE) for various modulation techniques i.e. BPSK, QPSK, 16-QAM and 64-QAM using multipath fading channels i.e. AWGN (Additive White Gaussian Noise), Rayleigh and Rician channel. The simulation results show that, with MMSE and ZF equalizers, the BER performances is better in MMSE equalizer. Further we analyzed in different fading channels for various modulation techniques in both the equalizers.
Keywords: MIMO, OFDM, ZF and MMSE Equalizer, Multipath fading channels, M-QAM.