Study of Transmission Characteristics of 2×2 Mimo System for OFDM Multiplexing and Bpsk Modulation with ZF Equalizer and MMSE Receivers
Bhagya. R1, A. G. Ananth2

1Bhagya. R, Assistant professor in Dept of Telecommunication, RVCE, Bangalore, Karnataka India.
2A. G. Ananth. Professor in Telecommunication Department of R.V College of Engineering, Bangalore, Karnataka India.

Manuscript received on July 01, 2012. | Revised Manuscript received on July 04, 2012. | Manuscript published on July 05, 2012. | PP: 37-40 | Volume-2, Issue-3, July 2012. | Retrieval Number: C0668052312 /2012©BEIESP
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Abstract: A Detailed Analysis Of 2×2 MIMO (Multiple Input Multiple Output) Combined With OFDM (Orthogonal Frequency Division Multiplexing) Transmission System And BPSK Modulation Has Been Carried Out. The BER Performance Of The System Has Been Determined For Additive White Gaussian Noise (AWGN) Presuming Flat Fading Rayleigh Channel. On The Receiver Side Linear Equalization Techniques Such As Zero Force Equalizer (ZF) And Minimum Mean Square Error (MMSE) Detectors Were Employed For Studying The BER Performance. The Simulation Results Show That For BER Of ~10-4 , The SNR Required Are ~34 Db For ZF Equalizer And ~31db For MMSE Equalizer. The Simulation Results Indicate That The MMSE Equalizer Shows Better Performance ~3 Db Over The ZF Equalizer. Further Comparison Of The 2X2 MIMO Performance Of OFDM With STBC Multiplexing Indicates Comparable BER Performances. The Simulation Results Are Presented And Discussed In The Paper.

Keywords: Multiple Input Multiple Output (MIMO), Orthogonal Frequency Division Multiplexing (OFDM), Space Time Block Coding (STBC), Binary Phase Shift Keying (BPSK), Bit Error Rate (BER), Signal To Noise Ratio (SNR), Zero Force Equalizer (ZFE) And Minimum Mean Square Error (MMSE).