Multislot estimation of frequency-selective fast-varying channels

Monica Nicoli, Osvaldo Simeone, Umberto Spagnolini

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

In mobile communications, the movement of terminals renders the multipath channel time varying. Even though the faded amplitudes are fast varying, the delays can be considered as stationary on a large temporal scale. In this paper, we propose a new subspace-based method that estimates the channel response from multiple slots by capitalizing on these different varying rates without explicitly computing the delays of the multipath. The temporal subspace is obtained from multiple single-slot training-based estimates of the (single-user or multiuser) channel response. Provided that the number of slots is large enough, the time basis can be calculated with any accuracy. As a consequence, the mean-square error on the channel response depends only on the number of fast-varying parameters that have to be estimated in a slot-by-slot fashion. Performance analysis and simulations confirm the expected benefits of the multislot approach in improving the efficiency of systems with short training sequences.

Original languageEnglish (US)
Pages (from-to)1337-1347
Number of pages11
JournalIEEE Transactions on Communications
Volume51
Issue number8
DOIs
StatePublished - Aug 1 2003
Externally publishedYes

Fingerprint

Multipath propagation
Mean square error
Communication

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Keywords

  • Code-division multiple access (CDMA)
  • Delay estimation
  • Fading channels
  • Multipath channels
  • Multiuser channels
  • Reduced rank processing
  • Subspace tracking
  • Time-division multiple access (TDMA)
  • Time-varying channels
  • Training

Cite this

Nicoli, Monica ; Simeone, Osvaldo ; Spagnolini, Umberto. / Multislot estimation of frequency-selective fast-varying channels. In: IEEE Transactions on Communications. 2003 ; Vol. 51, No. 8. pp. 1337-1347.
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Multislot estimation of frequency-selective fast-varying channels. / Nicoli, Monica; Simeone, Osvaldo; Spagnolini, Umberto.

In: IEEE Transactions on Communications, Vol. 51, No. 8, 01.08.2003, p. 1337-1347.

Research output: Contribution to journalArticle

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