Randy Lee Bright

US Patent:

6532374, Mar 11, 2003

Filed:

Jun 16, 2000

Appl. No.:

09/595318

Inventors:

Sandeep Chennakeshu - Cary NC
David Townsend - Chapel Hill NC
David R. Irvin - Raleigh NC
Randy Bright - Pittsboro NC

Assignee:

Ericsson Inc. - Research Triangle Park NC

International Classification:

H04B 106

US Classification:

455569, 455345, 37942004

Abstract:

A radiotelephone includes a base unit mounted within the vehicle having a wide area transceiver for communicating with a station outside the vehicle, a control unit disposed in the vehicle remotely from the base unit, and a local area network for establishing a communication link between the base unit and the control unit. The local area network is adapted to transmit control and data signals between the base unit and the control unit. The control unit includes a keypad for entering commands and data that are transmitted to the base unit via the local area network, and a display for displaying information to the user. The control unit may also include a speaker and microphone. Alternatively, the speaker and microphone may be contained in a remote audio unit that is linked to the base unit via the local area network. The control unit may, for example, be incorporated into the steering wheel of a vehicle while the base unit is concealed in the trunk or under the seat of the vehicle.

US Patent:

7046970, May 16, 2006

Filed:

Sep 25, 2001

Appl. No.:

09/962691

Inventors:

Cong Nguyen - Durham NC, US
Randy Bright - Pittsboro NC, US

Assignee:

Ericsson Inc. - Research Triangle Park NC

International Classification:

H04B 1/04

US Classification:

455110, 455102, 455108, 375302

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.