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:
Aug. 28, 1990
Filed:
Dec. 08, 1988
John D Kaewell, Jr, Bensalem, PA (US);
Nicholas C Schreier, Mercerville, NJ (US);
James J Roller, Media, PA (US);
International Mobile Machines Corporation, Phila., PA (US);
Abstract
A spatial diversity system for digital mobile telephone networks which comprises at least two antennas, one antenna being part of a primary (or master) unit and the other being part of a diversity (or slave) unit, each unit having processing means to detect the 'quality' of digital audio signals received by their respective antennas, the 'quality' comprising link quality, AGC level and parity errors; the primary unit being capable of comparing the 'quality' of the audio signals received by each antenna, selecting the higher 'quality' signal and transmitting the higher 'quality' signal to the telephone network.