Digital Signal Processing

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Performance Investigation of OPML Semi-Blind MIMO Channel Estimation Technique under Various Modulation Schemes and Different Receiver Antennas


Affiliations
1 Electronics and Communication Engg. Department, Charotar University of Science and Technology, Changa, India
2 Electrical Engg. Department, M.S. University, Baroda, India
     

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In this paper, we present Orthogonal Pilot MaximumLikelihood (OPML) based MIMO (Multi Input Multi Output) semi-blind channel estimation technique for quasi-static Rayleigh fading channel. Channel matrix H can be decomposed as the matrix product of a whitening matrix W and the unitary matrix Q , from which W can be estimated blindly using singular value decomposition of received output data and Q can be estimated exclusively from training sequences using OPML algorithm. Simulations taken for 2 transmitters and 4, 6 and 8 receiver antennas combination and different modulation schemes such as BPSK, 4-PSK and 8-PSK. Result shows that BER improvements in 8 receiver antennas and BPSK modulation scheme outperform others.

Keywords

Multi Input Multi Output, Orthogonal Pilot ML Estimator, Semi Blind Channel Estimation.
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  • Performance Investigation of OPML Semi-Blind MIMO Channel Estimation Technique under Various Modulation Schemes and Different Receiver Antennas

Abstract Views: 342  |  PDF Views: 2

Authors

Jaymin Bhalani
Electronics and Communication Engg. Department, Charotar University of Science and Technology, Changa, India
Dharmendra Chauhan
Electronics and Communication Engg. Department, Charotar University of Science and Technology, Changa, India
A. I. Trivedi
Electrical Engg. Department, M.S. University, Baroda, India

Abstract


In this paper, we present Orthogonal Pilot MaximumLikelihood (OPML) based MIMO (Multi Input Multi Output) semi-blind channel estimation technique for quasi-static Rayleigh fading channel. Channel matrix H can be decomposed as the matrix product of a whitening matrix W and the unitary matrix Q , from which W can be estimated blindly using singular value decomposition of received output data and Q can be estimated exclusively from training sequences using OPML algorithm. Simulations taken for 2 transmitters and 4, 6 and 8 receiver antennas combination and different modulation schemes such as BPSK, 4-PSK and 8-PSK. Result shows that BER improvements in 8 receiver antennas and BPSK modulation scheme outperform others.

Keywords


Multi Input Multi Output, Orthogonal Pilot ML Estimator, Semi Blind Channel Estimation.