Linear MMSE estimation of time-frequency variant channels for MIMO-OFDM systems

Pierluigi Salvo Rossi, Ralf R. Müller, Ove Edfors

Research output: Contribution to journalArticlepeer-review

18 Citations (SciVal)

Abstract

This paper proposes two low-complexity two-dimensional channel estimators for MIMO-OFDM systems derived from a joint time–frequency channel estimator. The estimators exploit both time and frequency correlations of the wireless channel via use of Slepian-basis expansions. The computational saving comes from replacing a two-dimensional Slepian-basis expansion with two serially concatenated one-dimensional Slepian-basis expansions. Performance in terms of normalized mean square error (NMSE) vs. signal-to-noise ratio (SNR) is analyzed via numerical simulations and compared with the original estimator. The analysis of the performance takes into account the impact of both system and channel parameters. The estimators are finally tested when used within the loop of an iterative receiver for MIMO-OFDM systems.
Original languageEnglish
Pages (from-to)1157-1167
JournalSignal Processing
Volume91
Issue number5
DOIs
Publication statusPublished - 2011

Subject classification (UKÄ)

  • Electrical Engineering, Electronic Engineering, Information Engineering

Keywords

  • MIMO-OFDM systems
  • Iterative receivers

Fingerprint

Dive into the research topics of 'Linear MMSE estimation of time-frequency variant channels for MIMO-OFDM systems'. Together they form a unique fingerprint.

Cite this