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OFDM channel estimation by singular value decomposition
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- Edfors, Ove (author)
- Luleå tekniska universitet,Signaler och system
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- Sandell, Magnus (author)
- Luleå tekniska universitet,Signaler och system
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- van de Beek, Jaap (author)
- Luleå tekniska universitet,Signaler och system
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- Luleå : Luleå tekniska universitet, 1996
- English 26 s.
- Series: Forskningsrapport / Högskolan i Luleå 1 jan 1974 → 31 dec 1996, 0347-0881 ; 1996:18
- Reports (other academic/artistic)
Abstract
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- 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.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Signalbehandling (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Signal Processing (hsv//eng)
Keyword
- Signalbehandling
- Signal Processing
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- rap (subject category)
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