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

Summary, in English

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.

• Författare: Pierluigi Salvo Rossi; Ralf R. Müller; Ove Edfors
• Avdelning/ar: Institutionen för elektro- och informationsteknik; ELLIIT: the Linköping-Lund initiative on IT and mobile communication
• Publiceringsår: 2011
• Språk: Engelska
• Sidor: 1157-1167
• Publikation/Tidskrift/Serie: Signal Processing
• Volym: 91
• Issue: 5
• Länkar: http://dx.doi.org/10.1016/j.sigpro.2010.10.017
• Dokumenttyp: Artikel i tidskrift
• Förlag: Elsevier
• Ämne: Electrical Engineering, Electronic Engineering, Information Engineering
• Nyckelord: MIMO-OFDM systems; Iterative receivers
• Status: Published
• Projekt: Radiosystem: NORDITE/WILATI - WIreless LANs with high Throughput in Interference-limited environments (VINNOVA, AM/FT/OE)
• Forskningsgrupp: Radio Systems
• ISBN/ISSN/Övrigt: ISSN: 0165-1684