Title :
Unbiased decision feedback equalization
Author :
Papadias, Constantinos B. ; Paulraj, Arogyaswami J.
Author_Institution :
Dept. of Wireless Commun. Res., Lucent Technol., Holmdel, NJ, USA
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;
Conference_Titel :
Information Theory, 1998. Proceedings. 1998 IEEE International Symposium on
Conference_Location :
Cambridge, MA
Print_ISBN :
0-7803-5000-6
DOI :
10.1109/ISIT.1998.709053
