OFDM channel estimation by singular value decomposition
1996 (English)Report (Other academic)
In this report we present and analyse low-rank channel estimators for orthogonal frequency-division multiplexing (OFDM) using the frequency correlation of the channel. Low-rank approximations based on the discrete Fourier transform (DFT) have been proposed but they suffer from poor performance when the channel is not sample-spaced. We apply the theory of optimal rank-reduction to linear minimum mean-squared error (LMMSE) estimators and show that these estimators, when using a fixed design, are robust to changes in channel correlation and signal-to-noise ratio (SNR). The performance is presented in terms of uncoded symbol-error rate (SER) for a system using 16-QAM.
Place, publisher, year, edition, pages
Luleå: Luleå tekniska universitet, 1996. , 26 p.
Research report / Luleå University of Technology1 jan 1974 → 31 dec 1996, ISSN 0347-0881 ; 1996:18
Research subject Signal Processing
IdentifiersURN: urn:nbn:se:ltu:diva-24711Local ID: c2790b30-df07-11dc-99e3-000ea68e967bOAI: oai:DiVA.org:ltu-24711DiVA: diva2:997763
Godkänd; 1996; 20080219 (ysko)2016-09-292016-09-29Bibliographically approved