In this paper, a novel additive noise variance estimation algorithm is proposed for multiuser CDMA systems experiencing time varying and frequency selective fading. The algorithm is developed by exploring the eigen-structure of the receive signal correlation matrix, which is characterized by the statistid properties of both the fading channeI and the additive white Gaussian noise. Relying only on the knowledge of the receiver signal samples, the algorithm can accurately estimate the variance of the additive noise present at the receiver of multiuser CDMA systems. The estimated noise variance can be employed along with other receiver algorithms to improve system performance.
J. Wu et al., "Estimation of Additive Noise Variance for Multiuser CDMA Systems," Proceedings of the International Conference on Communications, Circuits and Systems, 2005, Institute of Electrical and Electronics Engineers (IEEE), Jan 2005.
The definitive version is available at http://dx.doi.org/10.1109/ICCCAS.2005.1493386
International Conference on Communications, Circuits and Systems, 2005
Electrical and Computer Engineering
Keywords and Phrases
AWGN Channels; Correlation Methods; Eigenstructure Assignment; Matrix Algebra; Multiuser Channels; Signal Sampling; Time-Varying Channels; Code division multiple access
Article - Conference proceedings
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