1. A Low Complexity RLS-PASTd Algorithm for Blind Multiuser Detection in Dispersive CDMA Channels
- Author
-
Zi-Zhe Ding, Xiao-Long Zhu, and Xian-Da Zhang
- Subjects
Spread spectrum ,Recursive least squares filter ,Computational complexity theory ,Code division multiple access ,Applied Mathematics ,Singular value decomposition ,Detection theory ,Electrical and Electronic Engineering ,Multiuser detection ,Algorithm ,Subspace topology ,Computer Science Applications ,Mathematics - Abstract
For joint blind channel estimation and multiuser detection in direct-sequence code division multiple access (DS-CDMA) systems, a combined scheme is proposed, which couples the recursive least-squares (RLS) adaptations and the PASTd subspace tracking algorithm. A major advantage of the RLS-PASTd algorithm is that it admits an adaptive implementation with low computational complexity instead of singular value decomposition. Simulation results demonstrate the fast tracking capability and high steady-state estimation accuracy of the proposed algorithm in both the time-invariant and time-variant environments
- Published
- 2007