Low-complexity frequency-domain turbo equalization for single-carrier transmissions over doubly-selective channels

Authors:
Kun Fang;Luca Rugini;Geert Leus
Affiliations:
Delft Univ. of Technology, Dept. Electrical Eng., 2628 CD, The Netherlands;DIEI, University of Perugia, 06125, Italy;Delft Univ. of Technology, Dept. Electrical Eng., 2628 CD, The Netherlands
Venue:
ICASSP '09 Proceedings of the 2009 IEEE International Conference on Acoustics, Speech and Signal Processing
Year:
2009

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Block transmissions over doubly selective channels: iterative channel estimation and turbo equalization

EURASIP Journal on Advances in Signal Processing - Special issue on advanced equalization techniques for wireless communications

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Abstract

Single-carrier transmissions with frequency-domain equalization have gained much interest due to their comparable complexity and performance to OFDM, which conversely suffers from a high peak-to-average power ratio. In this paper, we develop a new frequency-domain block turbo equalizer for single-carrier (SC) transmissions over doubly-selective channels. The main feature of the proposed equalizer is its low complexity, which is only linear in the block length. A comparison between SC and OFDM systems with channel coding in doubly-selective channels is also given.