Modified blind selected mapping for OFDM/single-carrier signal transmission

Amnart Boonkajay, Fumiyuki Adachi

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

    1 Citation (Scopus)

    Abstract

    Blind selected mapping (blind SLM) is an effective peak-to-average power ratio (PAPR) reduction technique which does not require side information sharing. In the blind SLM, the receiver employs phase rotation sequence estimation, which can be carried out using maximum-likelihood (ML) estimation or 2-step sequence estimation using Viterbi algorithm. ML estimation typically requires much higher computational complexity. Recently, we showed that the use of codebook generated from a 2-level phase rotation set {0°, 135°} and the ML phase rotation sequence estimation based on the fourth-power QAM constellation requires much less complexity compared to the conventional blind SLM with 3-level phase rotation set {0°, 120°, 240°} and ML estimation based on original QAM constellation. However, for a large number of phase rotation sequences, the computational complexity still remains high. In this paper, in order to further reduce the computational complexity, we propose a combined use of a 2-level phase rotation set {0°, 135°} and the 2-step sequence estimation. The use of 2-level phase rotation set significantly reduces the number of branches and states in the Viterbi algorithm and hence, leads to complexity reduction. Simulation results confirm that the blind SLM using the 2-level phase rotation set and the 2-step sequence estimation has less computational complexity while achieving similar BER to the ML sequence estimation.

    Original languageEnglish
    Title of host publication2018 24th Asia-Pacific Conference on Communications, APCC 2018
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    Pages45-50
    Number of pages6
    ISBN (Electronic)9781538669280
    DOIs
    Publication statusPublished - 2019 Feb 1
    Event24th Asia-Pacific Conference on Communications, APCC 2018 - Ningbo, China
    Duration: 2018 Nov 122018 Nov 14

    Publication series

    Name2018 24th Asia-Pacific Conference on Communications, APCC 2018

    Conference

    Conference24th Asia-Pacific Conference on Communications, APCC 2018
    Country/TerritoryChina
    CityNingbo
    Period18/11/1218/11/14

    Keywords

    • OFDM
    • PAPR
    • SLM
    • single carrier

    ASJC Scopus subject areas

    • Computer Networks and Communications
    • Signal Processing
    • Communication

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