Precoder design for ISI channels based on iterative LMMSE equalization

Author

Yuan, Xiaojun ; Li, Haitao ; Ping, Li ; Lin, Xiaokang

Author_Institution

Dept. of Electron. Eng., City Univ. of Hong Kong, Hong Kong

fYear

2008

fDate

1-5 Sept. 2008

Firstpage

198

Lastpage

203

Abstract

A precoding technique is proposed for single-carrier block transmission with cyclic prefix (CP) insertion over inter-symbol interference (ISI) channels. The precoder is based on circular convolution that can be implemented in the frequency domain, so that the detection complexity is kept low using the linear-minimum-mean-square-error (LMMSE) frequency domain equalization (FDE) technique. The precoder can be designed in a low-cost way using the water-filling principle, or optimized based on the signal-to-noise-ratio- (SNR-) variance evolution. Numerical results show that the precoding gain roughly corresponds with the water-filling gain.

Keywords

computational complexity; equalisers; intersymbol interference; iterative methods; least mean squares methods; precoding; ISI channel; cyclic prefix insertion; detection complexity; frequency domain equalization technique; inter-symbol interference channel; iterative LMMSE equalization; linear-minimum-mean-square-error; precoder design; signal-to-noise-ratio variance evolution; single-carrier block transmission; water-filling principle; Decoding; Design engineering; Design optimization; Fading; Forward error correction; Frequency domain analysis; Intersymbol interference; OFDM; Parity check codes; Turbo codes; ISI channels; OFDM; SNR-variance evolution; iterative LMMSE-FDE equalization;

fLanguage

English

Publisher

ieee

Conference_Titel

Turbo Codes and Related Topics, 2008 5th International Symposium on

Conference_Location

Lausanne

Print_ISBN

978-1-4244-2862-5

Electronic_ISBN

978-1-4244-2863-2

Type

conf

DOI

10.1109/TURBOCODING.2008.4658697

Filename

4658697