Title :
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
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;
Conference_Titel :
Global Telecommunications Conference, 1998. GLOBECOM 1998. The Bridge to Global Integration. IEEE
Conference_Location :
Sydney,NSW
Print_ISBN :
0-7803-4984-9
DOI :
10.1109/GLOCOM.1998.775962
