Improved Square Contour Algorithm for Blind Equalization of QAM Signals

Author

Sheikh, Shahzad Amin ; Fan, Pingzhi

Author_Institution

Inst. of Mobile Commun., Southwest Jiaotong Univ., Chengdu

fYear

2006

fDate

23-24 Dec. 2006

Firstpage

116

Lastpage

119

Abstract

Improved square contour algorithm for blind equalization of QAM signals is presented in this paper. The new scheme employs the estimated symbols in the cost function along with the dispersion constant enforcing equalizer output to reside on multiple moduli. This mechanism reduces the error associated with the new cost function in an efficient manner, which leads to a noteworthy increase in convergence speed and inter-symbol interference suppression. The convergence characteristics of the proposed scheme demonstrated by the simulation results for 16-QAM signal constellation substantiate the efficacy of this new blind equalizer over existing square contour algorithm (SCA) and recently proposed modified square contour algorithm (MSCA)

Keywords

blind equalisers; functions; intersymbol interference; quadrature amplitude modulation; QAM signals; auadrature amplitude modulation; blind equalization; convergence characteristics; improved square contour algorithm; intersymbol interference suppression; modified square contour algorithm; Adaptive algorithm; Blind equalizers; Constellation diagram; Convergence; Cost function; Degradation; Interference suppression; Intersymbol interference; Mobile communication; Quadrature amplitude modulation; Blind Equalization; Modified Square Contour Algorithm (MSCA); Quadrature Amplitude Modulation (QAM) Signaling; Square Contour Algorithm (SCA);

fLanguage

English

Publisher

ieee

Conference_Titel

Multitopic Conference, 2006. INMIC '06. IEEE

Conference_Location

Islamabad

Print_ISBN

1-4244-0795-8

Electronic_ISBN

1-4244-0795-8

Type

conf

DOI

10.1109/INMIC.2006.358147

Filename

4196390