Title :
A simple iterative bi-directional equalization for EDGE wireless systems
Author :
Tang, Xiang-Guo ; Ding, Zhi
Author_Institution :
Centillium Commun. Inc, Fremont, CA, USA
Abstract :
We present a new and simple iterative equalization scheme for EDGE wireless systems. The new method improves the detection reliability through bi-directional processing on the DDF-SOVA equalizer. Relying on the mechanism of decision feedback in the DDF (delayed decision feedback) equalizer, bi-directional processing can be performed to exploit the time diversity of the received signal bursts for more reliable equalizer output. A special case of DFE-SISO (soft-input/soft-output) equalizer is also discussed. Simulation results show that, with modest increase in computational complexity, the bi-directional turbo equalizer can achieve significant performance gain over the single-directional turbo equalizer.
Keywords :
3G mobile communication; decision feedback equalisers; iterative methods; signal detection; signal processing; telecommunication standards; turbo codes; 3G wireless communication; 8PSK symbols; DDF-SOVA equalizer; DFE-SISO equalizer; EDGE wireless systems; Enhanced Data Rates for Global Evolution; bi-directional processing; bi-directional turbo equalizer; computational complexity; decision feedback; delayed decision feedback equalizer; detection reliability; iterative bi-directional equalization; performance gain; received signal bursts diversity; simulation results; single-directional turbo equalizer; soft-input/soft-output equalizer; third-generation mobile wireless communication standards; Bidirectional control; Binary phase shift keying; Decision feedback equalizers; Decoding; Delay effects; Delay estimation; Filters; GSM; Lakes; Output feedback;
Conference_Titel :
Global Telecommunications Conference, 2002. GLOBECOM '02. IEEE
Print_ISBN :
0-7803-7632-3
DOI :
10.1109/GLOCOM.2002.1188086
