Blind Multiple Access Interference Suppression Algorithm Based on Relaxed Subgradient Projection for DS/CDMA Systems

A novel blind multiple access interference suppression algorithm based on relaxed parallel subgradient projection is proposed for DS/CDMA systems. The qualification “relaxed” is manifest in two aspects: first, the new expression for updating the interference suppression filter coefficients vector re...

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Bibliographic Details
Published in:Circuits, systems, and signal processing Vol. 29; no. 4; pp. 769 - 780
Main Authors: Wei, Xin, Zhao, Li, Zou, Cairong
Format: Journal Article
Language:English
Published: Boston SP Birkhäuser Verlag Boston 01.08.2010
Springer Nature B.V
Subjects:
Algorithms
Blinds
Circuits and Systems
Computation
Electric noise
Electrical Engineering
Electronics and Microelectronics
Engineering
Instrumentation
Interference
Mathematical analysis
Multiple access
Parallel processing
Projection
Signal,Image and Speech Processing
Vector space
Vectors (mathematics)
Multiple access interference suppression
DS/CDMA systems
Relaxed parallel subgradient projection
ISSN:0278-081X, 1531-5878
Online Access:Get full text
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Summary:A novel blind multiple access interference suppression algorithm based on relaxed parallel subgradient projection is proposed for DS/CDMA systems. The qualification “relaxed” is manifest in two aspects: first, the new expression for updating the interference suppression filter coefficients vector relaxes paralleled projection fields and reduces computation complexity. In addition, the relaxation parameter in the updated process is adaptively determined to guarantee the interference suppression filter coefficients vector falling into fields containing the optimal filter coefficients vector after several iterations. Theoretical analysis and simulation results conclude that this algorithm has a fast convergence speed, steady interference suppression performance, low computation and low bit error rate.
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ISSN:0278-081X
1531-5878
DOI:10.1007/s00034-010-9170-z