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A Noval RAR-QOSTBC Scheme with Linear Decoding for M-PSK Over Diverse Channels

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Abstract

The full rate can be attained by the conventional Quasi-Orthogonal Space–Time Block Codes (QO-STBC) with the downside of more decoding intricacy and less diversity gain. Grammian matrix of already existing QO-STBC scheme contains non-diagonal elements i.e. interference terms which are responsible for more computational load at the receiver. The non-diagonal elements causing interference while decoding process are eliminated from the grammian matrix by the use of RAR (reflection and rotation) operations on the detection matrix of already existing QO-STBC. Reflection and rotation QO-STBC (RAR-QOSTBC) scheme is proposed in this paper, which results in transformation of the grammian matrix into a diagonal matrix. Corresponding to the diagonal matrix, a new RAR-QOSTBC encoding matrix is generated. RAR-QOSTBC scheme enables to achieve more diversity gain as well as it reduces decoding intricacy at the receiver as comparison to the already existing QO-STBC method. Analysis has been performed for different levels of PSK modulation over two distinct channels (AWGN and Rayleigh) by changing the number of receive antennas. Simulation result shows a significant improvement in the BER performance because of the removal of non-slanting elements from the detection matrix.

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Authors and Affiliations

  1. School of Electronics and Electrical Engineering, Lovely Professional University, Phagwara, India

    Shyna Chugh & Lavish Kansal

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  1. Shyna Chugh
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  2. Lavish Kansal
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Correspondence to Lavish Kansal.

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Chugh, S., Kansal, L. A Noval RAR-QOSTBC Scheme with Linear Decoding for M-PSK Over Diverse Channels. Int J Wireless Inf Networks 25, 108–115 (2018). https://doi.org/10.1007/s10776-017-0380-1

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  • DOI: https://doi.org/10.1007/s10776-017-0380-1

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