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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