Linear MMSE estimation of time-frequency variant channels for MIMO-OFDM systems
Author
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.
Department/s
Publishing year
2011
Language
English
Pages
1157-1167
Publication/Series
Signal Processing
Volume
91
Issue
5
Document type
Journal article
Publisher
Elsevier
Topic
- Electrical Engineering, Electronic Engineering, Information Engineering
Keywords
- MIMO-OFDM systems
- Iterative receivers
Status
Published
Project
- Radiosystem: NORDITE/WILATI - WIreless LANs with high Throughput in Interference-limited environments (VINNOVA, AM/FT/OE)
Research group
- Radio Systems
ISBN/ISSN/Other
- ISSN: 0165-1684