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- Edfors, Ove, et al.
(författare)
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OFDM channel estimation by singular value decomposition
- 1996
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Ingår i: Mobile technology for the human race. - Piscataway, NJ : IEEE Communications Society. - 0780331575 ; , s. 923-927
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Konferensbidrag (refereegranskat)abstract
- A new approach to low-complexity channel estimation in orthogonal-frequency division multiplexing (OFDM) systems is proposed. A low-rank approximation is applied to a linear minimum mean-squared error (LMMSE) estimator that uses the frequency correlation of the channel. By using the singular-value decomposition (SVD) an optimal low-rank estimator is derived, where performance is essentially preserved - even for low computational complexities. A fixed estimator, with nominal values for channel correlation and signal-to-noise ratio (SNR), is analysed. Analytical mean-squared error (MSE) and symbol-error rates (SER) are presented for a 16-QAM OFDM system.
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