John A Kilpatrick

US Patent:

7672645, Mar 2, 2010

Filed:

Jun 15, 2006

Appl. No.:

11/454134

Inventors:

John Kilpatrick - Lexington MA, US
Joel Dawson - Cambridge MA, US
Jose Bohorquez - Cambridge MA, US
Jeff Venuti - Somerville MA, US

Assignee:

BitWave Semiconductor, Inc. - Lowell MA

International Classification:

H04B 1/40
H04Q 7/20

US Classification:

455 76, 455102, 455103, 4551274

Abstract:

Transmitter architectures designed to accommodate both constant and non-constant of envelope modulation schemes and capable of providing local oscillator carrier frequencies within any one of numerous desired frequency bands, thus allowing compliance with many different communication standards. One example of a programmable frequency synthesizer includes a plurality of transmitter components and a microcontroller coupled to the frequency synthesizer and to the plurality of transmitter components. The microcontroller is adapted to provide a frequency control signal to the frequency synthesizer to control a frequency of the local oscillator carrier frequency. In addition, the microcontroller is also adapted to provide digital control signals to at least some of the plurality of transmitter components to turn on and off different ones of the plurality of transmitter components based on an operating mode of the transmitter, such that the transmitter can accommodate both constant envelope modulation and non-constant envelope modulation schemes.

US Patent:

61415669, Oct 31, 2000

Filed:

Jan 11, 1999

Appl. No.:

9/228569

Inventors:

Mitchell R. Gerdisch - Naperville IL
John A. Kilpatrick - Lexington MA

Assignee:

Tellabs Operations, Inc. - Lisle IL

International Classification:

H04B 726
H04B 1500
H04Q 720

US Classification:

455562

Abstract:

A preferred embodiment of the present invention provides a cell site base station configuration for a wireless communications system that makes use of a sectorized base station co-located with an omnidirectional base station. The sectorized base station has a sectorized antenna system and the omnidirectional base station has an omnidirectional antenna. The configuration may also include a controller that monitors the base station for communications links subject to adverse conditions and reassigns any such links to the omnidirectional base station. The adverse conditions monitored for may include multiple fade, equipment failure and a lack of available channels. The controller may also monitor the omnidirectional base station for links that can be moved to the sectorized base station and reassign any such links to the sectorized base station. The configuration may also include a network that interconnects the sectorized base station, the omnidirectional base station and the controller.