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A low-complexity noncoherent MAP detector for turbo-coded unitary space-time modulation scheme

Published: 26 October 2011 Publication History

Abstract

In non-coherent multiple-input multiple-output (MIMO) systems, the conventional noncoherent MAP detector is too complex to be performed if the number of labelling bits conveyed within one single coherence block is high. In order to overcome this difficulty, in this paper, we propose a noncoherent MAP (maximum a posteriori) detector with very low complexity for orthogonally designed USTM (unitary space-time modulation) schemes. In addition, we show that the detected soft values are independent of the extrinsic information fed back from the turbo decoder. As a result, iterative detection and decoding between the noncoherent detector and the turbo decoder can be avoided without performance degradation. Compared to the scheme using the exhaustive-search-based noncoherent MAP detector, the proposed scheme achieves the same error performance, and has a much lower detection complexity.

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  1. A low-complexity noncoherent MAP detector for turbo-coded unitary space-time modulation scheme

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    ISABEL '11: Proceedings of the 4th International Symposium on Applied Sciences in Biomedical and Communication Technologies
    October 2011
    949 pages
    ISBN:9781450309134
    DOI:10.1145/2093698
    Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

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    • Technical University of Catalonia Spain: Technical University of Catalonia (UPC), Spain
    • River Publishers: River Publishers
    • CTTC: Technological Center for Telecommunications of Catalonia
    • CTIF: Kyranova Ltd, Center for TeleInFrastruktur

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    Published: 26 October 2011

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    Author Tags

    1. iterative decoding
    2. iterative detection
    3. multiple-input multiple-output (MIMO)
    4. noncoherent detection
    5. turbo codes
    6. unitary space-time modulation (USTM)

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    • River Publishers
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    • CTIF

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