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Implementation of 8x8 MIMO OFDM systems for higher order modulation using QOSTBC under different fading channels


Ms. Aarti Sharma , SSSIST, Sehore; Prof. Mukesh Tiwari, SSSIST, Sehore; Mr. Amol Kumbhare, MIST, Indore; Mr. Manish Korde, MIST, Indore


QOSTBC (Quasi Orthogonal Space Time Block Code), OFDM (Orthogonal Frequency Division Multiplexing) , MIMO(Multiple-Input Multiple-Output)


A general Quasi orthogonal space time block code (QOSTBC) structure is proposed for multiple-input multiple-output-orthogonal frequency division multiplexing (MIMO-OFDM) systems for 8 X 8 antenna configuration. The signal detection technology used in this work for MIMO-OFDM system is Zero-Forcing Equalization (linear detection technique). In this paper, analysis of high level of modulations (i.e. M-QAM and M-PSK for different values of M) on MIMO-OFDM system is presented. In this, AWGN, Rayleigh and Rician channels have been used for analysis purpose and their effect on BER and Spectral Efficiency for high data rates have been presented. The proposed system has better performance than the other systems in terms of SNR improvement of 3-5 dB and spectral efficiency.

Other Details

Paper ID: IJSRDV1I4044
Published in: Volume : 1, Issue : 4
Publication Date: 01/07/2013
Page(s): 998-1001

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