An Improved Variable Step-Size Dual-Mode Blind Equalization Algorithm for QAM Signals

Author

Li, Chisheng ; Dong, Wenjuan ; Luo, Hanwan

Author_Institution

Dept. of Electron. Eng., Shanghai Jiaotong Univ., Shanghai, China

fYear

2009

fDate

13-15 Nov. 2009

Firstpage

1

Lastpage

4

Abstract

An Improved variable step-size dual-mode blind equalization algorithm for QAM signals is proposed in this paper. The algorithm which is combining the decision feedback equalizer (DFE) structure uses a variable step-size in its start-up mode to speed up its convergence rate, and then switches to the directed decision (DD) as the tracking mode to reduce the residual error after convergence. Simulation results show that the proposed algorithm has a faster convergence rate and lower residual error, and can compensate the phase rotation automatically.

Keywords

blind equalisers; decision feedback equalisers; quadrature amplitude modulation; QAM signals; decision feedback equalizer; directed decision; phase rotation; variable step-size dual-mode blind equalization algorithm; Blind equalizers; Communication switching; Convergence; Decision feedback equalizers; Filters; Intersymbol interference; Quadrature amplitude modulation; Signal analysis; Steady-state; Switches; Blind Equalization Algorithm; Decision Feedback Equalizer; Dual-Mode; QAM; Variable Step-size;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications & Signal Processing, 2009. WCSP 2009. International Conference on

Conference_Location

Nanjing

Print_ISBN

978-1-4244-4856-2

Electronic_ISBN

978-1-4244-5668-0

Type

conf

DOI

10.1109/WCSP.2009.5371742

Filename

5371742