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:
Feb. 08, 1994
Filed:
Oct. 26, 1990
Adelio Conti, Montevecchia, IT;
Paolo Troyer, Sesto S. Giovanni, IT;
Rocco Nobili, Cassina de Pecchi, IT;
Telettra S.p.A., , IT;
Abstract
A system for detecting data spectrum distortion in a transmitted signal, in particular distortion caused by selective fading. The system includes: two blocks in parallel, which act on the spectrum average power of the input signal in an equal but opposite manner (i.e. they have equal slopes but act with opposite effect on the amplitude of the input signal versus frequency); two detectors which detect the average power output from the two respective blocks, each being associated with one of the blocks; and one comparitor for comparing the outputs of the two detectors. The system allows one to detect the asymmetries of the data spectrum and, by adding an AGC and a reference voltage, information related to the notch frequency f.sub.o is also obtained. The distortion measurement obtained in this manner allows one to generate a switching criterion, as a countermeasure for selective fadings in the transmitted signal.