Equalization of OSDM over time-varying channels based on diagonal-block-banded matrix enhancement

Jing Han, Yujie Wang, Zehui Gong, Geert Leus

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Orthogonal signal-division multiplexing (OSDM) has recently emerged as a promising alternative to orthogonal frequency division multiplexing (OFDM) for high-rate wireless communications. Although providing more flexibility in system design, it suffers from a special interference structure, namely inter-vector interference (IVI), when channel time variations are present. In this paper, we first derive the general OSDM signal model over time-varying channels, and then show that a time-domain window can be used to enhance the diagonal-block-banded (DBB) approximation of the channel matrix in a transformed domain. Furthermore, based on the DBB matrix enhancement, a low-complexity OSDM equalization algorithm is designed. Simulation results indicate that the proposed equalizer has significant performance advantages over that using the direct DBB approximation.

Original languageEnglish
Article number107333
Pages (from-to)1-6
Number of pages6
JournalSignal Processing
Volume168
DOIs
Publication statusPublished - 2020

Keywords

  • Equalization
  • Inter-vector interference
  • OSDM
  • Time-varying channel
  • Underwater acoustic communication

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