Low-cost perturbation-based ICI equalizers for OFDMA mobile systems

Hsin De Lin*, Tzu-Hsien Sang, Jiunn Tsair Chen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

For advanced mobile communication systems that adopt orthogonal frequency-division multiple access (OFDMA) technologies, intercarrier interference (ICI) significantly degrades performance when mobility is high. Standard specifications and concerns about complexity demand low-cost methods with deployment readiness and decent performance. In this paper, novel zero forcing (ZF) and minimum mean-square error (MMSE) equalizers based on per-subcarrier adaptive (PSA) processing and perturbation-based (PB) approximation are introduced. The proposed equalizers strike a good balance between implementation cost and performance; therefore they are especially suitable for OFDMA downlink receivers. Theoretical analysis and simulations are provided to verify our claims.

Original languageEnglish
Pages (from-to)3509-3518
Number of pages10
JournalIEICE Transactions on Communications
VolumeE95-B
Issue number11
DOIs
StatePublished - 1 Jan 2012

Keywords

  • Doubly-selective fading channel
  • ICI cancellation
  • Intercarrier interference (ICI)
  • Orthogonal frequency-division multiple access (OFDMA)

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