Iterative interference alignment techniques for broadba.nd wireless systems with limited feedback

Sara Teodoro, Adao Silva, Rui Dinis, Atilio Gameiro

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

Interference alignment (IA) is a promising technique that allows high capacity gains in interfering channels. In this paper we consider iterative IA techniques for the downlink of OFDM-based (Orthogonal Frequency Division Multiplexing) broadba.nd wireless systems with limited feedback. A quantized version of the channel state information (CSI) associated to the different links between base station (BS) and user terminal (UT) is feedback from the UT to the BS, which sends it to the other BSs through a limited-capacity backhaul network. This information is employed by each BS to perform the overall IA design. Our channel quantization method requires much less complexity than ra.ndom vector quantization based techniques and requires the quantization of a fraction of the channel frequency response samples. The results have shown that a small number of quantization bits per multipath component is enough to allow performance close to one obtained with perfect channel knowledge.

Original languageEnglish
Title of host publication2013, 7th International Conference on Signal Processing and Communication Systems, ICSPCS 2013 - Proceedings
PublisherIEEE Computer Society
ISBN (Print)978-1-4799-1319-0
DOIs
Publication statusPublished - 2013
Event2013 7th International Conference on Signal Processing and Communication Systems, ICSPCS 2013 - Gold Coast, QLD, Australia
Duration: 16 Dec 201318 Dec 2013

Conference

Conference2013 7th International Conference on Signal Processing and Communication Systems, ICSPCS 2013
CountryAustralia
CityGold Coast, QLD
Period16/12/1318/12/13

Keywords

  • broadba.nd wireless communications
  • channel quantization
  • Interference alignment
  • limited feedback

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    Teodoro, S., Silva, A., Dinis, R., & Gameiro, A. (2013). Iterative interference alignment techniques for broadba.nd wireless systems with limited feedback. In 2013, 7th International Conference on Signal Processing and Communication Systems, ICSPCS 2013 - Proceedings [6723902] IEEE Computer Society. https://doi.org/10.1109/ICSPCS.2013.6723902