Pilot Assisted MIMO-OFDM-IM Design for Time-Varying Underwater Acoustic Communications

Altabbaa M. T.

Wireless Personal Communications, vol.121, no.1, pp.399-409, 2021 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 121 Issue: 1
  • Publication Date: 2021
  • Doi Number: 10.1007/s11277-021-08642-6
  • Journal Name: Wireless Personal Communications
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, PASCAL, Applied Science & Technology Source, Communication Abstracts, Compendex, Computer & Applied Sciences, INSPEC
  • Page Numbers: pp.399-409
  • Keywords: Index modulation, MIMO, Space-frequency, Underwater acoustic communications
  • İstanbul Yeni Yüzyıl University Affiliated: Yes

Abstract

This paper proposes a multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing-index modulation (OFDM-IM) design for underwater acoustic communications. The proposed MIMO-OFDM-IM utilizes an equally spaced known data (pilot subcarriers). This feature assists in overcoming different dilemmas that arise in underwater acoustic time-varying channels. In addition, the pilot subcarriers of the proposed communication scheme assists in channel estimation. This feature improves the overall performance of the maximum likelihood detector in the active subcarriers detection. The performance of the proposed transceiver scheme is presented using synthetic underwater acoustic channels. The proposed approach shows enhancement in the symbol error rate and outperforms the conventional MIMO-OFDM approach.