Codeword metric calculation scheme for outer code in overloaded MIMO-OFDM system

Yoshihito Doi, Yukitoshi Sanada

    Research output: Chapter in Book/Report/Conference proceedingConference contribution


    This paper presents a codeword metric calculation scheme in two step joint decoding of block coded signals in an overloaded multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) system. In the previous literature, the two step joint decoding scheme has been proposed for the complexity reduction of joint maximum likelihood decoding in the overloaded MIMO system. However, the two step decoding scheme has not been combined with an outer code. The selection of the candidate codewords in the inner block code may not always be able to provide the metric of a binary coded symbol for the outer code. The metric of the binary coded symbol calculated in the first stage is used in the proposed scheme. It is shown that the proposed two step decoding scheme shows better performance than a bit flipping based scheme and reduces the complexity by about 0.013 for 4 signal streams with the cost of bit error rate degradation within 0.5dB.

    Original languageEnglish
    Title of host publicationIEEE Vehicular Technology Conference
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    ISBN (Print)9781479980888
    Publication statusPublished - 2015 Jul 1
    Event81st IEEE Vehicular Technology Conference, VTC Spring 2015 - Glasgow, United Kingdom
    Duration: 2015 May 112015 May 14


    Other81st IEEE Vehicular Technology Conference, VTC Spring 2015
    CountryUnited Kingdom

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering
    • Computer Science Applications
    • Applied Mathematics

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