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Matrix Coded Modulation: A New Non-coherent MIMO Scheme

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Abstract

This paper describes a new space-time coding scheme for non-coherent multi-antenna multi-input multi-output (MIMO) systems. This new MIMO scheme merges error-correcting and space-time coding functions by transmitting invertible matrices, so this scheme has been called “Matrix Coded Modulation” or “MCM”. Coherent systems require channel state information (CSI) at the transmitters and/or at the receivers, and their performances strongly depend on the channel estimation. For example, in systems using Orthogonal frequency division multiplexing, the channel estimation requires the insertion of pilot-symbols in the transmitted frame which implies a spectral efficiency loss of the global system that increase with the number of transmit antennas. The existing non-coherent schemes such as the differential space-time modulation leads to performance degradation compared to coherent systems in which perfect CSI is assumed. Decoding in the MCM scheme is performed iteratively, based on a specified detection criteria. In the proposed MCM scheme, decoding can be achieved with or without CSI at the receiving antennas. As the space-time coding function is merged with the error-correcting code, the euclidean distances distribution between modulated signals based on the detection criteria is strongly linked to the Hamming weights distribution of the channel error-correcting code used in the MCM scheme. Moreover, a low-complexity decoding algorithm is described and compared to the existing differential schemes.

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Authors and Affiliations

  1. France-Telecom/Orange Labs-Rennes, 4 rue du clos courtel, 35512, Cesson-Sévigné Cedex, France

    Ali El Arab & Jean-Claude Carlach

  2. IETR/INSA-Rennes, 20 avenue des Buttes de Coesmes, 35000, Rennes, France

    Maryline Hélard

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  1. Ali El Arab
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  2. Jean-Claude Carlach
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  3. Maryline Hélard
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Correspondence to Ali El Arab.

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El Arab, A., Carlach, JC. & Hélard, M. Matrix Coded Modulation: A New Non-coherent MIMO Scheme. Wireless Pers Commun 72, 1587–1601 (2013). https://doi.org/10.1007/s11277-013-1122-z

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  • DOI: https://doi.org/10.1007/s11277-013-1122-z

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