Title :
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
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;
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
DOI :
10.1109/TURBOCODING.2008.4658697
