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:
Nov. 30, 1999
Filed:
Oct. 10, 1996
Wen Tong, Ottawa, CA;
Rui Wang, Ottawa, CA;
Alauddin Javed, Nepean, Ontario, CA;
Alexander Vasiliyevich Garmonov, Voronezh, RU;
Anatoli Vasilievich Kotov, Ottawa, Ontario, CA;
Andrey Yuriyevich Savinkov, Voronezh, RU;
Anatoly Gennadiyvich Filatov, Voronezh, RU;
Other;
Abstract
Co-channel interference in baseband digital samples of an FM communications (e.g. AMPS) signal is cancelled by a complex signal limiter and non-linear filter (CLNF), to which the samples are supplied, and a time-varying null filter unit, to which the output samples from the CLNF are supplied, for separating the desired signal from residual interference. The output samples from the CLNF are also supplied via a selective narrow band filter bank to a non-linear transform unit for producing an energy based demodulation signal from which time-varying coefficients for the null filter are obtained. The units can be used individually or in different arrangements and combinations, and the transform unit can be augmented and used to replace a conventional FM demodulator.