Title :
Blind adaptive multiuser detection based on affine projection algorithm
Author :
Li, Jian ; Zhang, Xian-Da
Author_Institution :
Dept. of Autom., Tsinghua Univ., Beijing, China
Abstract :
In this letter, we introduce a novel blind multiuser detector based on the affine projection algorithm (APA) for direct-sequence code-division multiple-access (DS-CDMA) systems. Computational complexities of least mean-squares (LMS), recursive least squares (RLS), Kalman, and APA-based blind multiuser detection algorithms are compared. The proposed technique has similar convergence and tracking properties as the RLS algorithm with much reduced computational cost. Simulation results are presented to compare our APA-based algorithm with the blind LMS, RLS, and Kalman schemes.
Keywords :
adaptive signal detection; code division multiple access; computational complexity; filtering theory; multiuser detection; spread spectrum communication; tracking filters; APA filtering; DS-CDMA system; Kalman algorithms; RLS algorithm; affine projection algorithm; blind adaptive multiuser detection; computational complexity; convergence; direct-sequence code-division multiple-access; recursive least squares algorithms; tracking property; Computational complexity; Convergence; Detectors; Kalman filters; Least squares approximation; Least squares methods; Multiaccess communication; Multiuser detection; Projection algorithms; Resonance light scattering; Affine projection algorithm (APA); blind multiuser detection; code-division multiple access (CDMA); minimum output energy;
Journal_Title :
Signal Processing Letters, IEEE
DOI :
10.1109/LSP.2005.853053
