Modified sign-algorithm for adaptive Laguerre equalizer in DS-CDMA communication systems

Author

Benjangkaprasert, C. ; Sirithummachak, P. ; Lertwatechakul, M.

Author_Institution

Fac. of Eng., King Mongkut´s Inst. of Technol., Bangkok, Thailand

fYear

2014

fDate

22-25 Oct. 2014

Firstpage

1

Lastpage

4

Abstract

This paper aims to improve the performance of DS-CDMA receiver by using a new adaptive equalizer with a modified sign-algorithm based on Laguerre filter structure. The proposed algorithm is modified version of the conventional sign-regressor algorithm for a Laguerre filter. By the simulation result, the BER performance of the proposed algorithm is shown to be better than the classical sign-regressor (SR) algorithm and the recursive least square (RLS) algorithm in multipath channel. This equalizer not only reduce the effected of ISI, MAI and the implementation cost, but also minimizes the computational complexity and supports the long impulse response system.

Keywords

adaptive equalisers; code division multiple access; computational complexity; error statistics; interference suppression; intersymbol interference; least squares approximations; multipath channels; radio receivers; recursive filters; spread spectrum communication; stochastic processes; transient response; BER performance; DS-CDMA communication system; DS-CDMA receiver; ISI reduction; Laguerre filter structure; MAI reduction; RLS algorithm; SR algorithm; adaptive Laguerre equalizer; computational complexity minimizes; implementation cost reduction; impulse response system; intersymbol interference; modified sign-regressor algorithm; multiaccess interference; multipath channel; recursive least square algorithm; Adaptive equalizers; Adaptive filters; Adaptive systems; Bit error rate; Filtering algorithms; Multiaccess communication; DS-CDMA system; Laguerre equalizer; RLS algorithm; Sign algorithm;

fLanguage

English

Publisher

ieee

Conference_Titel

TENCON 2014 - 2014 IEEE Region 10 Conference

Conference_Location

Bangkok

ISSN

2159-3442

Print_ISBN

978-1-4799-4076-9

Type

conf

DOI

10.1109/TENCON.2014.7022344

Filename

7022344