Modified generalised quadrature spatial modulation

Gunde, K and Hari, KVS (2019) Modified generalised quadrature spatial modulation. In: 25th National Conference on Communications, NCC 2019, 20 - 23 February 2019, Bangalore.

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Abstract

In this paper, we propose a Modified Generalised Quadrature Spatial Modulation (mGQSM) scheme with multiple RF chains. The proposed scheme, compared to GQSM, proposes a novel codebook design which provides one extra bit per channel use (bpcu) spectral efficiency with the constraint of log- 2 begin pmatrix N- t N- r- f end pmatrix geq0.5, where N- t denotes number of transmit antennas, and N- r- f denotes number of RF chains, 1leq N- rf leq lfloorfrac N- t 2 rfloor. Using the ML detection algorithm, we study the performance of mGQSM with and without imperfect channel state information, via numerical simulations. We compute the computational complexity of ML-decoding in terms of real valued multiplications and introduce a variant of mGQSM called Reduced Codebook mGQSM (RC-mGQSM) to reduce the complexity but resulting in a decrease in spectral efficiency.

Item Type:	Conference Paper
Publication:	25th National Conference on Communications, NCC 2019
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Additional Information:	The copyright for this article belongs to Institute of Electrical and Electronics Engineers Inc.
Keywords:	Channel state information; Efficiency, Codebook design; Codebooks; Imperfect channel state information; ML decoding; ML detections; Spatial modulations; Spectral efficiencies; Transmit antenna, Modulation
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited:	29 Nov 2022 06:07
Last Modified:	29 Nov 2022 06:07
URI:	https://eprints.iisc.ac.in/id/eprint/78068

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