Title :
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
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;
Conference_Titel :
Systems, Man and Cybernetics, 2008. SMC 2008. IEEE International Conference on
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-2383-5
Electronic_ISBN :
1062-922X
DOI :
10.1109/ICSMC.2008.4811446
