A robust fuzzy step size LMS algorithm for DS-UWB systems

Author

Cheng, Chia-Hsin ; Chen, Yu-Fan ; Chen, Kai-Jie ; Huang, Yung-Fa

Author_Institution

Dept. of Comput. & Commun. Eng., Chaoyang Univ. of Technol., Chaoyang

fYear

2008

fDate

12-15 Oct. 2008

Firstpage

1205

Lastpage

1210

Abstract

This paper discusses a direct-sequence ultra-wideband (DS-UWB) system that uses the least-mean-square (LMS) adaptive filter for interference cancellation. Compared to the conventional LMS algorithm, the fuzzy step size LMS algorithm which we propose can perform rapid convergence with a low steady-state fluctuation error. The sequential partial update scheme is used in the proposed fuzzy step size LMS algorithm to reduce the system complexity without trading off the bit-error-rate (BER). Simulations are conducted to evaluate the convergence and tracking behavior of the proposed LMS algorithm.

Keywords

adaptive filters; convergence of numerical methods; fuzzy set theory; interference suppression; least mean squares methods; spread spectrum communication; ultra wideband communication; DS-UWB system; convergence; direct-sequence ultra-wideband system; interference cancellation; least-mean-square adaptive filter; robust fuzzy step size LMS algorithm; sequential partial update scheme; Adaptive filters; Bit error rate; Convergence; Fluctuations; Fuzzy systems; Interference cancellation; Least squares approximation; Robustness; Steady-state; Ultra wideband technology; DS-UWB; Fuzzy interference control; Least-mean-square (LMS) algorithm;

fLanguage

English

Publisher

ieee

Conference_Titel

Systems, Man and Cybernetics, 2008. SMC 2008. IEEE International Conference on

Conference_Location

Singapore

ISSN

1062-922X

Print_ISBN

978-1-4244-2383-5

Electronic_ISBN

1062-922X

Type

conf

DOI

10.1109/ICSMC.2008.4811446

Filename

4811446