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. 23, 1999
Filed:
Aug. 19, 1994
Keith Irl Mulford, Arlington Heights, IL (US);
Thomas Joseph McClaughry, Hoffman Estates, IL (US);
Gary Wayne Persinotti, Elizabethtown, PA (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A digital radio frequency ('RF') communication unit (103, 104) measures digital signal quality based on received signal strength information ('RSSI') and/or bit error rate ('BER') information. The RSSI and/or BER information are compared with a predetermined threshold. If the predetermined threshold is exceeded, then simulated RF channel noise is injected into the speaker path during unvoiced periods in the message at a level which indicates the RF signal quality to warn the user of the digital communication unit that the outer limits of a given coverage area are being approached.