Title :
Blind multiuser detector for DS/CDMA channels based on the modified stochastic gradient descent algorithm
Author :
Mukherjee, A. ; Teh, E.C. ; Gunawan, E.
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Inst., Singapore
Abstract :
The convergence rate of an adaptive filter is one of the key elements which determines the performance of the filter in a moderately slow time-varying channel. In this paper a new blind minimum mean-square error (MMSE) linear detector based on the modified stochastic gradient descent (SGD) algorithm is presented. The proposed detector is simple, robust and has a faster convergence rate than the conventional SGD algorithm
Keywords :
adaptive filters; adaptive signal detection; code division multiple access; convergence; filtering theory; gradient methods; land mobile radio; least mean squares methods; multiuser channels; signal detection; spread spectrum communication; stochastic processes; time-varying channels; DS/CDMA channels; adaptive filter; blind MMSE linear detector; blind multiuser detector; convergence rate; filter performance; minimum mean-square error; mobile receivers; modified stochastic gradient descent algorithm; slow time-varying channel; Adaptive filters; Detectors; Mobile computing; Multiaccess communication; Multiuser detection; Robustness; Stochastic processes; Time-varying channels; Timing; Vectors;
Conference_Titel :
Communications, 2001. ICC 2001. IEEE International Conference on
Conference_Location :
Helsinki
Print_ISBN :
0-7803-7097-1
DOI :
10.1109/ICC.2001.937157
