Paper Info
Title
Fast CDMA multiuser detection by orthogonal projection onto an interference null space
Abstract
This paper presents a method for asynchronous code-division multiple-access (CDMA) multiuser detection that has low computational complexity and that provides fast convergence. The proposed method efficiently finds an interference subspace from data samples and projects received signals onto its orthogonal complement to suppress multiple access interferences. Its performance has been analytically investigated in terms of the signal-to-interference-plus-noise ratio (SINR). The steady-state SINR is substantially the same as the optimum when the interferences are strong compared with noise. As to the transient response, the orthogonal-projection-based method converges quickly outperforming other methods such as the stochastic-gradient (SG) multistage Wiener filter (MSWF) and the affine projection method, which have similar computational complexity. Simulation results validate its effectiveness.
Year
DOI
Venue
2009
10.1016/j.dsp.2008.01.001
Digital Signal Processing
Keywords
Field
DocType
affine projection method,asynchronous code-division multiple-access,fast cdma multiuser detection,interference subspace,steady-state sinr,similar computational complexity,orthogonal projection,multiple access interference,interference null space,data sample,low computational complexity,multiuser detection (mud),orthogonal-projection-based method,cdma,signal to interference plus noise ratio,computational complexity,code division multiple access,transient response,wiener filter,steady state
Kernel (linear algebra),Wiener filter,Mathematical optimization,Orthographic projection,Multiuser detection,Interference (wave propagation),Orthogonal complement,Code division multiple access,Mathematics,Computational complexity theory
Journal
Volume
Issue
ISSN
19
3
Digital Signal Processing
Citations 
PageRank 
References 
0
0.34
18
Authors
1
Name
Order
Citations
PageRank
Yang-Ho Choi1336.66