Averaging methods for blind multiuser detection in DS/CDMA systems

Author

Krishnamurthy, Vikram ; Lindqvist, Kristian

Author_Institution

Dept. of Electr. & Electron. Eng., Melbourne Univ., Parkville, Vic., Australia

Volume

6

fYear

1998

fDate

1998

Firstpage

3566

Abstract

We present a blind adaptive code-aided algorithm for suppression of multiuser interference (MAI) and narrow-band interference (NBI) in DS/CDMA systems. The algorithm -which we call the BAG algorithm-is based on the concept of accelerating the convergence of stochastic gradient methods by averaging. This ingenious concept of averaging was invented by Polyak-our paper examines its application to interference suppression in DS/CDMA systems. We prove that our averaged gradient algorithm has the same asymptotic rate of convergence as RLS, but at a order of magnitude lower computational cost

Keywords

adaptive signal processing; code division multiple access; convergence; gradient methods; interference suppression; signal detection; spread spectrum communication; stochastic processes; BAG algorithm; DS/CDMA systems; asymptotic rate of convergence; averaged gradient algorithm; averaging methods; blind adaptive code-aided algorithm; blind averaged gradient method; blind multiuser detection; computational cost; convergence; interference suppression; multiuser interference; narrow-band interference; stochastic gradient methods; suppression; Acceleration; Convergence; Gradient methods; Interference suppression; Multiaccess communication; Multiple access interference; Multiuser detection; Narrowband; Resonance light scattering; Stochastic processes;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference, 1998. GLOBECOM 1998. The Bridge to Global Integration. IEEE

Conference_Location

Sydney,NSW

Print_ISBN

0-7803-4984-9

Type

conf

DOI

10.1109/GLOCOM.1998.775962

Filename

775962