Time-varying versus time-invariant finite-length MMSE-DFE on stationary dispersive channels

Author

Al-Dhahir, Naofal

Author_Institution

Corp. Res. & Dev., Gen. Electr. Co., Schenectady, NY, USA

Volume

46

Issue

1

fYear

1998

fDate

1/1/1998 12:00:00 AM

Firstpage

11

Lastpage

15

Abstract

A time-varying structure and a time-invariant structure for the finite-length minimum-mean-square-error decision feedback equalizer (MMSE-DFE) are presented and their performances are compared on a stationary channel impaired by intersymbol interference (ISI) and additive Gaussian noise. The time-varying structure has an innovations error sequence but incurs a throughput loss on ISI channels because of its block-processing nature. Conditions under which the time-invariant structure exhibits near-optimal performance are described. Both structures converge to the canonical MMSE-DFE of Cioffi et al. (see ibid., vol.43, p.2582-94, 1995 and vol.43, p.2595-2604, 1995) as their filters´ lengths become infinite

Keywords

FIR filters; Gaussian noise; decision feedback equalisers; filtering theory; intersymbol interference; least mean squares methods; time-varying channels; FIR filter; ISI; ISI channels; additive Gaussian noise; block-processing; decision feedback equalizer; filter length; innovations error sequence; intersymbol interference; minimum-mean-square-error DFE; near-optimal performance; performance; stationary dispersive channels; throughput loss; time-invariant finite-length MMSE-DFE; time-varying finite-length MMSE-DFE; Additive noise; Decision feedback equalizers; Dispersion; Finite impulse response filter; Gaussian noise; Helium; Intersymbol interference; Technological innovation; Throughput; Time factors;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/26.655396

Filename

655396