Combined channel estimation and data detection using soft statistics for frequency-selective fast-fading digital links

Author

Baccarelli, Enzo ; Cusani, Roberto

Author_Institution

INFOCOM Dept., Rome Univ., Italy

Volume

46

Issue

4

fYear

1998

fDate

4/1/1998 12:00:00 AM

Firstpage

424

Lastpage

427

Abstract

A novel adaptive nonlinear equalizer for fast time-varying multipath channels that combines the channel estimation and data detection tasks is presented. The a posteriori probabilities (APPs) of the states of the intersymbol interference (ISI) channel are recursively computed from the received data by a symbol-by-symbol (SbS) detector and are then employed by a Kalman-type nonlinear channel estimator. Robust channel tracking and good data-detection performance are obtained, with a reasonable receiver complexity

Keywords

Kalman filters; adaptive equalisers; digital radio; fading; intersymbol interference; multipath channels; parameter estimation; probability; radio links; radio receivers; signal detection; statistical analysis; time-varying channels; tracking; HF radio links; ISI channel; Kalman filter; Kalman-type nonlinear channel estimator; a posteriori probabilities; adaptive nonlinear equalizer; channel estimation; data detection; data detection performance; digital links; fast time-varying multipath channels; frequency-selective fast-fading; intersymbol interference channel; receiver complexity; robust channel tracking; soft statistics; symbol-by-symbol detector; Channel estimation; Covariance matrix; Equalizers; Fading; Frequency estimation; Intersymbol interference; Maximum likelihood estimation; Recursive estimation; State estimation; Statistics;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/26.664292

Filename

664292