Iterative combined decision feedback equalization and decoding for broadband wireless single carrier systems

Author

Koppler, A. ; Huemer, M. ; Springer, A. ; Weigel, R.

Author_Institution

Inst. for Commun. & Inf. Eng., Johannes Kepler Univ., Linz, Austria

Volume

1

fYear

2003

fDate

23 Feb.-1 March 2003

Firstpage

743

Abstract

Single carrier transmission with frequency domain equalization (SC/FDE) exhibits approximately the same performance and signal processing complexity as orthogonal frequency division multiplexing (OFDM) for broadband wireless access (BWA) systems or W-LANs. We propose the extension with low complexity iterative decision feedback equalization and decoding for conventional blockwise SC/FDE transmission. The described turbo-like scheme approximately achieves the efficiency of ideal decision feedback equalization. We also demonstrate that the feedback of softly decided symbols before the first decoding step provides an extra gain. Simulation results show a remarkable performance increase for highly frequency selective multipath channels.

Keywords

broadband networks; decision feedback equalisers; iterative decoding; multipath channels; radio access networks; wireless LAN; OFDM; WLAN; broadband wireless single carrier systems; frequency domain equalization; frequency selective multipath channels; iterative combined decision feedback equalization; iterative decoding; low complexity DFE; orthogonal frequency division multiplexing; signal processing complexity; simulation results; single carrier transmission; softly decided symbols; Communication system software; Decision feedback equalizers; Frequency domain analysis; Hardware; Intersymbol interference; Iterative decoding; Noise cancellation; OFDM; Physical layer; Wireless LAN;

fLanguage

English

Publisher

ieee

Conference_Titel

Telecommunications, 2003. ICT 2003. 10th International Conference on

Print_ISBN

0-7803-7661-7

Type

conf

DOI

10.1109/ICTEL.2003.1191502

Filename

1191502