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:
Apr. 09, 1991
Filed:
Apr. 06, 1989
Robert W Brandstetter, Levittown, NY (US);
Grumman Aerospace Corporation, Bethpage, NY (US);
Abstract
A multi-channel filter which exploits the parallel processing advantages of an optical signal processor is used to sort, classify and remove noise or unwanted signals from signals of interest. This filter shall perform real time parallel signal processing to effectively channelize and remove unwanted spectra from the various signals of interest in a dense radio frequency environment. This would in effect transform a single channel that is corrupted with unwanted signals, interference and noise, to a number of discrete channels which are spectrally tailored to selected signals of interest. The filtering process is accomplished by modulating a laser carrier with the given signal of interest and performing all filtering functions optically and then down converting the filtered signal back into its original radio frequency for further use.