Low-Complexity Equalization of MIMO-OSDM

Jing Han, Shengqian Ma, Yujie Wang, Geert Leus

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Orthogonal signal-division multiplexing (OSDM) is an attractive alternative to conventional orthogonal frequency-division multiplexing (OFDM) due to its enhanced ability in peak-to-average power ratio (PAPR) reduction. Combining OSDM with multiple-input multiple-output (MIMO) signaling has the potential to achieve high spectral and power efficiency. However, a direct channel equalization in this case incurs a cubic complexity, which may be expensive for practical use. To solve the problem, low-complexity per-vector and block equalization algorithms of MIMO-OSDM are proposed in this paper for time-invariant and time-varying channels, respectively. By exploiting the channel matrix structures, these algorithms have only a linear complexity in the transformed domain. Simulation results demonstrate their validity and the related performance comparisons.

Original languageEnglish
Article number8922647
Pages (from-to)2301-2305
Number of pages5
JournalIEEE Transactions on Vehicular Technology
Volume69
Issue number2
DOIs
Publication statusPublished - 1 Feb 2020

Keywords

  • equalization
  • inter-vector interference
  • MIMO
  • OSDM
  • underwater acoustic communication

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