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:
Oct. 12, 1976
Filed:
Sep. 03, 1975
Telespazio S.p.A. per le Comunicazioni Spaziali, Rome, IT;
GTE Telecomunicazioni S.p.A., Milan, IT;
Societa Italiana Telecomunicazioni Siemens S.p.A., Milan, IT;
Abstract
A station for the transmission and reception of electromagnetic waves (e.g. from a communication satellite in stationary earth orbit), operating in a multichannel band with two conjugate polarizations, includes a regenerative distortion compensator in a receiving waveguide branch and a predistorter in a transmitting waveguide branch, both controlled by a processor responsive to output signals from a subsequent i-f stage in which a distortion monitor measures cross-talk between the two polarizations on the basis of two central beacons extracted from the incoming message band. The distortion monitor is preceded within the i-f stage by a phase and amplitude stabilizer and is followed by a demodulating stage in which the message signals are distributed to different transmission paths corresponding to the several channels, each transmission path including an individual cancellation-type distortion corrector controlled either by coherent detectors responding to respective channel beacons or by correlators fed with message signals from the two polarizations.