Mark J Frank

US Patent:

RE37757, Jun 18, 2002

Filed:

Jul 6, 1998

Appl. No.:

09/121604

Inventors:

Mark Steven Frank - Beaverton OR
Daniel Richard Tayloe - Phoenix AZ
Dariusz Andrej Blasiak - Chicago IL
Paul Robert Christian - Crystal Lake IL
Bradley B. Bakke - Lake in the Hills IL

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04Q 700

US Classification:

455428, 370316, 370331, 455427, 455436, 455443

Abstract:

A subscriber unit ( ) communicates with a satellite communication system ( ) that projects cells. The satellites ( ) and cells move relative to the earth. During every other TDMA frame, a subscriber unit ( ) measures the signal strength of all candidate hand-off beams. The signal strength of the current beam is compared to the signal strength of the candidate hand-off beams. When the signal strength of the current beam is not the strongest, a counter is incremented ( ). A hand-off is requested to the beam with the greatest signal level when the counter exceeds a predetermined threshold. Accordingly, only after the current antenna beam has not been the strongest beam for a certain period of time, is a hand-off requested. A different counter threshold is used for candidate hand-off beams from other satellites ( ).

US Patent:

8049663, Nov 1, 2011

Filed:

Feb 12, 2009

Appl. No.:

12/370022

Inventors:

Mark S. Frank - Beaverton OR, US
Marty K. Rupp - Tucson AZ, US
Devin B. Pratt - Vail AZ, US

Assignee:

Raytheon Company - Waltham MA

International Classification:

G01S 7/40

US Classification:

342189, 342159, 342173, 342174, 342194, 455 631

Abstract:

A method to improve a system's signal performance may comprise: generating a first signal, transmitting the first signal, receiving the first signal, and generating a second signal. The method may further comprise: identifying signal distortions generated by at least one of, a transmitter hardware that transmits the first signal and a receiver hardware that receives the first signal, modifying the second signal based upon the identified signal distortions, correlating the first signal and the second signal by a correlator to generate a correlated signal, and outputting the correlated signal.