Performance of turbo codes in overloaded MIMO-OFDM systems using joint decoding

Ilmiawan Shubhi, Yukitoshi Sanada

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

    4 Citations (Scopus)

    Abstract

    In order to support high data rate communications, the third generation partnershIP project (3GPP) long term evolution (LTE) implements multIPle-input multIPle-output (MIMO) systems. In addition, to achieve excellent performance, LTE also employs turbo codes as the forward error correcting (FEC) standard. Although conventional turbo codes give satisfactory performance in the ideal MIMO, significant performance degradation occurs in an overloaded MIMO system when the number of transmit antennas is larger than the number of receive antennas. This paper proposes a joint decoding scheme for turbo codes in overloaded MIMO-OFDM systems. In joint turbo decoding, the calculations of soft information are based on the bit combinations from all of streams. In addition, a super-trellis diagram is used to combine the trellis diagrams. Numerical results obtained through computer simulation show that the proposed scheme achieves better performance by 2.0dB for 4 transmit antennas and 2 receive antennas in the BER of 10-5. The proposed scheme also achieves throughput improvement with the ratio close to the theoretical overloaded MIMO capacity.

    Original languageEnglish
    Title of host publicationIEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    Pages386-390
    Number of pages5
    Volume2015-June
    ISBN (Print)9781479949120
    DOIs
    Publication statusPublished - 2015 Jun 25
    Event2014 25th IEEE Annual International Symposium on Personal, Indoor, and Mobile Radio Communication, IEEE PIMRC 2014 - Washington, United States
    Duration: 2014 Sep 22014 Sep 5

    Other

    Other2014 25th IEEE Annual International Symposium on Personal, Indoor, and Mobile Radio Communication, IEEE PIMRC 2014
    CountryUnited States
    CityWashington
    Period14/9/214/9/5

    Keywords

    • Joint Decoding
    • Joint Turbo Decoding
    • Overloaded MIMO-OFDM
    • Spatial MultIPlexing Modulation
    • Turbo Codes

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering

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  • Cite this

    Shubhi, I., & Sanada, Y. (2015). Performance of turbo codes in overloaded MIMO-OFDM systems using joint decoding. In IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC (Vol. 2015-June, pp. 386-390). [7136195] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/PIMRC.2014.7136195