Conference Record of the Thirty-First Asilomar Conference on Signals, Systems and Computers (Cat. No.97CB36163) (1997)

Pacific Grove, CA, USA

Nov. 2, 1997 to Nov. 5, 1997

ISSN: 1058-6393

ISBN: 0-8186-8316-3

pp: 595-599

A. Leke , Inf. Syst. Lab., Stanford Univ., CA, USA

ABSTRACT

This paper analyzes the degradation in signal-to-noise ratio, and thus probability of error, due to channel estimation errors for a discrete multitone modulation (DMT) system in a Rayleigh fading environment. A scalar channel model similar to the well known Jakes model with additive white Gaussian noise is assumed. Analytic expressions for the multitone SNR as a function of mean-square-error in channel estimation are derived. Various prediction techniques are analyzed, and a least mean squares (LMS) algorithm is proposed to track the channel; the weights obtained are then used to predict the next snapshot of the channel. Finally, the link between channel estimate update frequency and maximum Doppler shift is derived.

INDEX TERMS

modulation, Gaussian noise, white noise, Doppler shift, fading, Rayleigh channels, estimation theory, land mobile radio, error statistics, least mean squares methods, radiofrequency interference, prediction theory

CITATION

A. Leke and J. Cioffi, "Effects of channel estimation errors on discrete multitone modulation (DMT) systems in a Rayleigh fading environment,"

*Conference Record of the Thirty-First Asilomar Conference on Signals, Systems and Computers (Cat. No.97CB36163)(ACSSC)*, Pacific Grove, CA, USA, , pp. 595-599.

doi:10.1109/ACSSC.1997.680447

CITATIONS