Title :
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
fDate :
23 Feb.-1 March 2003
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;
Conference_Titel :
Telecommunications, 2003. ICT 2003. 10th International Conference on
Print_ISBN :
0-7803-7661-7
DOI :
10.1109/ICTEL.2003.1191502
