Performance analysis of the linearly constrained constant modulus algorithm-based multiuser detector

This paper quantifies the adaptive performance of a blind adaptive multiuser detector (MUD) based on the linearly constrained constant modulus algorithm (LCCMA) in both a stationary and nonstationary channel. A framework is developed to apply the feedback analysis method to analyzing adaptive MUD sc...

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Bibliographic Details
Published in:IEEE transactions on signal processing 2005-02, Vol.53 (2), p.643-653
Main Authors: Whitehead, J.B., Takawira, F.
Format: Article
Language:English
Subjects:
Adaptive algorithms
Adaptive filters
Additive noise
Algorithms
Applied sciences
Blind adaptive multiuser detection
Blinds
Channels
Closed-form solution
code division multiple access
constant modulus algorithm
Constraints
Detection, estimation, filtering, equalization, prediction
Detectors
Exact sciences and technology
excess mean square error
Feedback
feedback analysis
Information, signal and communications theory
Mean square error methods
Mud
Multiaccess communication
Multiple access interference
Multiuser detection
Performance analysis
Signal and communications theory
Signal, noise
Steady-state
steady-state analysis
Telecommunications and information theory
tracking analysis
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Summary:This paper quantifies the adaptive performance of a blind adaptive multiuser detector (MUD) based on the linearly constrained constant modulus algorithm (LCCMA) in both a stationary and nonstationary channel. A framework is developed to apply the feedback analysis method to analyzing adaptive MUD schemes. A closed-form expression for the excess mean square error (EMSE) of LCCMA blind adaptive MUD in a CDMA communications system is derived for both of the steady-state and tracking cases. The effects of additive noise and multiple access interference are considered. A transient analysis is performed that predicts the learning curve of the adaptive filter. Computer simulation is used to verify the accuracy of the analysis.
ISSN:1053-587X
1941-0476
DOI:10.1109/TSP.2004.840781