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:
Dec. 16, 2003
Filed:
Feb. 16, 2000
Hideaki Odagiri, Tokyo, JP;
Oki Electric Industry Co., Ltd., Tokyo, JP;
Abstract
A digital matched filter stores a series of values of a digital input signal in a memory, compares each stored value with a corresponding value of a known code, and generates an analog comparison result signal for each comparison. The analog comparison result signals are combined to obtain an analog sum signal, which is then converted to a digital output signal. The digital output signal is obtained in real time, because there is little or no processing delay in combining the analog comparison result signals. The circuits that generate and combine the analog comparison result signals are similar to digital circuits, enabling the digital matched filter to be integrated easily with other digital signal-processing circuits.