Unbiased decision feedback equalization

Author

Papadias, Constantinos B. ; Paulraj, Arogyaswami J.

Author_Institution

Dept. of Wireless Commun. Res., Lucent Technol., Holmdel, NJ, USA

fYear

1998

fDate

16-21 Aug 1998

Firstpage

448

Abstract

We consider the problem of decision feedback equalization (DFE) with the use of finite impulse response (FIR) filters. We show that, contrarily to what seems to be believed, unbiased finite-length DFE solutions exist for any FIR channel, provided that the feed-forward (FFF) and feedback (FBF) filter lengths are properly chosen. This allows for the derivation of the expressions for the optimal zero-forcing (ZF) and minimum-mean-square-error (MMSE) finite-length solutions. The result can be also used as a guideline for choosing the lengths of the FFF and FBF DFE filters

Keywords

FIR filters; circuit feedback; decision feedback equalisers; feedforward; filtering theory; interference suppression; intersymbol interference; least mean squares methods; DFE filters; FIR channel; FIR filters; ISI; MMSE finite-length solution; feed-forward filter length; feedback filter length; finite impulse response filters; intersymbol interference; minimum-mean-square-error; optimal zero-forcing solution; unbiased decision feedback equalization; unbiased finite-length DFE; Decision feedback equalizers; Delay; Feedforward systems; Field-flow fractionation; Finite impulse response filter; Guidelines; Information systems; Noise cancellation; Switches; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Information Theory, 1998. Proceedings. 1998 IEEE International Symposium on

Conference_Location

Cambridge, MA

Print_ISBN

0-7803-5000-6

Type

conf

DOI

10.1109/ISIT.1998.709053

Filename

709053