The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 14, 1994
Filed:
Feb. 27, 1992
Shoichi Mizoguchi, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
An automatic equalizer includes an adaptive matched filter connected in front of a decision feedback equalizer of a conventional design. The adaptive matched filter has an A/D converter for sampling and quantizing an analog baseband signal into a digital signal, which is applied to a transversal filter. The transversal filter is supplied with tap coefficients adaptively controlled by a control signal generator which makes automatic adjustments to symmetrize the impulse response of a transmission path depending on the status of fading. The automatic equalizer can sufficiently equalize the fading in the range .rho.>1 in which the reflected wave is stronger than the direct wave, which fading cannot be adequately equalized only by the conventional decision feedback equalizer.