A beamspace-time approach to CCI/ISI cancellation for sectored wireless communications

Chung Lien Ho*, Ta-Sung Lee

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

A beamspace-time receiver is proposed for cochannel interference (CCI) suppression and channel equalization in a sectored wireless communication environment. The scheme involves two stages. First, a set of adaptive beamformers encompassing a prescribed sector is constructed on an antenna array, each providing effective suppression of out-of-sector CCI and increased reception of in-sector desired signals. Second, channel equalization is performed to eliminate the inter-symbol-interference (ISI) with a space-time joint processor operating on the output from the set of beamformers. By selecting a few receive beams in the sector, the dimension of the space-time data is greatly reduced, rendering advanced algorithms of channel equalization a feasible solution. Through simulation examples, it is shown that the proposed low complexity processor provides an effective joint suppression of ISI and CCI, and exhibits robustness against environmental variations.

Original languageEnglish
Pages (from-to)33-45
Number of pages13
JournalJournal of the Chinese Institute of Electrical Engineering, Transactions of the Chinese Institute of Engineers, Series E/Chung KuoTien Chi Kung Chieng Hsueh K'an
Volume10
Issue number1
StatePublished - 1 Feb 2003

Keywords

  • Antenna array
  • Beamforming
  • Equalizer
  • Interference cancellation
  • Space-time processing

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