Title :
Interference suppression using LMS and NLMS for CDMA system
Author :
Tahernezhadi, M. ; Zhu, L. ; Thomas, A. ; Kong, X.
Author_Institution :
Dept. of Electr. Eng., Northern Illinois Univ., DeKalb, IL, USA
Abstract :
The objective of this paper is to examine the effectiveness of N-tap and D-tap cyclically shifted filter banks (CSFB) adaptive schemes for interference suppression in an asynchronous code division multiple access (CDMA) system employing Gold code signature sequences. The LMS and NLMS algorithms are employed for the adaptation of tap coefficients. In addition, post convergence error probability and signal to distortion ratio are computed in order to make a comparison between the performance of N-tap structure and D-tap CSFB structure
Keywords :
adaptive filters; band-pass filters; code division multiple access; filtering theory; interference suppression; least mean squares methods; CDMA; D-tap CSFB; Gold code signature sequences; LMS algorithm; N-tap CSFB; NLMS algorithm; adaptation; asynchronous code division multiple access; cyclically shifted filter banks; interference suppression; post convergence error probability; signal to distortion ratio; Adaptive filters; Bit error rate; Convergence; Delay; Distortion; Error probability; Filter bank; Gold; Interference suppression; Least squares approximation; Matched filters; Multiaccess communication;
Conference_Titel :
Circuits and Systems, 1994., Proceedings of the 37th Midwest Symposium on
Conference_Location :
Lafayette, LA
Print_ISBN :
0-7803-2428-5
DOI :
10.1109/MWSCAS.1994.518959
