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:
May. 16, 2006
Filed:
Sep. 25, 2001
Cong Nguyen, Durham, NC (US);
Randy Bright, Pittsboro, NC (US);
Cong Nguyen, Durham, NC (US);
Randy Bright, Pittsboro, NC (US);
Ericsson Inc., Research Triangle Park, NC (US);
Abstract
Phase modulation control techniques and supporting apparatus avoid phase discontinuity at the outset of RF signal generation. Such discontinuities might arise from phase control instabilities associated with transmit start up or from abrupt changes in phase at the beginning of transmit signal generation. A transmitter uses starting phase values in advance of transmit data phase values to initialize phase modulation control circuits or functions. Once phase control is stabilized, and possibly after other criteria are met, the transmitter transitions from using the starting phase values to using the transmit data phase values, so that a transmit signal begins carrying phase modulations associated with the desired transmit data. The phase modulation control techniques described herein apply where transmitters employ direct phase modulation in RF signal generation, and may have particular applicability to burst-type RF transmitters, such as a transmitter employing direct modulation of amplitude and phase in an EDGE communication system.