Space-time zero-forcing pre-equalization for synchronous dispersive multi-user channels

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

Abstract

There are several forms of precoding that can be used to defeat inter-block interference (IBI) in multipulse communication techniques such as OFDM; techniques include cyclic prefixes and (most simply) inter-block time gaps. The dispersion caused by multipath requires some kind of accommodation by using available resources; prefixes use extra time and/or energy. The goal of this paper is to show how extra space (via multiple transmit antenna elements) can also be used. This paper first introduces a synchronous dispersive multi-user multi-input multi-output (MEMO) channel model. Due to dispersion, any single SISO (single-input single-output) block is full column-rank and thus has an empty null space. However, under certain conditions, when enough receive antenna elements are employed, the null space becomes richer; ultimately, the matrix becomes full row-rank. Based on this idea, we identify sufficient conditions for zero-forcing of the inter-block interference. Finally, we propose an approach for the construction of near-optimum signal sets to achieve zero-forcing precoding.

Original languageEnglish (US)
Title of host publicationInternational Symposium on Wireless Personal Multimedia Communications, WPMC
PublisherIEEE Computer Society
Pages1333-1336
Number of pages4
Volume3
ISBN (Print)0780374428
DOIs
StatePublished - 2002
Event5th International Symposium on Wireless Personal Multimedia Communications, WPMC 2002 - Honolulu, United States
Duration: Oct 27 2002Oct 30 2002

Other

Other5th International Symposium on Wireless Personal Multimedia Communications, WPMC 2002
CountryUnited States
CityHonolulu
Period10/27/0210/30/02

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ASJC Scopus subject areas

  • Computer Networks and Communications
  • Computer Science Applications
  • Human-Computer Interaction

Cite this

Flikkema, P. G. (2002). Space-time zero-forcing pre-equalization for synchronous dispersive multi-user channels. In International Symposium on Wireless Personal Multimedia Communications, WPMC (Vol. 3, pp. 1333-1336). [1088396] IEEE Computer Society. https://doi.org/10.1109/WPMC.2002.1088396