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:
Jul. 05, 1994
Filed:
Oct. 01, 1992
James B Tsui, Dayton, OH (US);
Joseph Caschera, Beavercreek, OH (US);
Abstract
The circuit may be used to encode the channel outputs of a Bragg cell receiver, or other type of channelized receiver. Bragg cell receivers use acousto-optic delay lines to analyze signals such as radar pulses present in the Electronic Warfare (EW) environment. These receivers require high probability of intercept with low false alarm rates. The present design in determining frequency from a Bragg receiver is by comparing the amplitude from adjacent outputs. If the output of a certain channel is higher than its neighboring ones and the signal crosses threshold, the frequency of the input signal is determined by that channel. There is one major deficiency from this approach, that is, the design generates false alarms. A frequency encoding circuit is proposed which uses five adjacent channels to make a decision on whether a given output is a true signal, or a false alarm. With this approach, two guard channels will be needed at both ends of the channels.