Convergence and stability analysis of a synchronous adaptive CDMA receiver

Author

Bin, Bin Zhu ; Ansari, Nirwan ; Siveski, Zoran

Author_Institution

Dept. of Electr. & Comput. Eng., New Jersey Inst. of Technol., Newark, NJ, USA

Volume

43

Issue

12

fYear

1995

fDate

12/1/1995 12:00:00 AM

Firstpage

3073

Lastpage

3079

Abstract

A thorough investigation on the convergence and stability of an adaptive synchronous CDMA receiver is presented. The receiver consists of a decorrelator at the first stage and an adaptive interference canceler at the second stage. By using a steepest descent algorithm that minimizes the output signal energy to adaptively control the weights, neither the knowledge of the users´ received amplitudes nor the use of training sequences is required. The system is near-far resistant, and its error performance approaches the single-user bound when the interferers´ SNRs are high. Sufficient conditions for the receiver to achieve convergence are derived, and their properties are analyzed

Keywords

adaptive control; code division multiple access; convergence of numerical methods; interference suppression; radio receivers; radiofrequency interference; stability; synchronisation; SNR; adaptive interference canceler; convergence; decorrelator; error performance; near-far resistant system; output signal energy minimisation; single-user bound; stability analysis; steepest descent algorithm; sufficient conditions; synchronous adaptive CDMA receiver; weights; Additive white noise; Convergence; Decorrelation; Degradation; Detectors; Gaussian noise; Interference; Multiaccess communication; Stability analysis; System performance;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/26.477510

Filename

477510