Jeffrey A Lorbeck

6965753, Nov 15, 2005

Aug 30, 2000

09/651820

David S. Miller - Carlsbad CA, US
Jeffrey A. Lorbeck - San Diego CA, US

QUALCOMM Incorporated - San Diego CA

H04B007/185

455 121, 455 6716, 455427, 367 90, 367 94, 367904

Apparatus for Doppler correction in a wireless communications system, including a first frequency synthesizer for generating a carrier signal oscillating at a rate responsive to a first input, a counter coupled to the first input for generating a Doppler compensation signal, the counter having a clock input, and a second frequency synthesizer coupled to the clock input for generating a clock signal oscillating at a rate responsive to a rate input. The rate input is adjusted over time according to a predetermined sequence so that the Doppler compensation signal compensates for the Doppler effect experienced by, for example, ground-to-satellite communications in a satellite communications system.

20030114135, Jun 19, 2003

Aug 31, 1999

09/386866

JEFFREY LORBECK - SAN DIEGO CA, US

H04H001/00

455/403000, 455/465000, 455/003050

A fixed phone arrangement for a satellite communications system is disclosed. A radio antenna unit is mounted in a location to provide optimum line of sight communication with one or more satellites so as to provide a wireless link to a central station over a first wireless link. A terminal unit is located in any convenient place that enables it to communicate with the radio antenna unit over a second wireless link, preferably using CT-1 frequencies.

61819123, Jan 30, 2001

Sep 9, 1998

9/150499

David S. Miller - Carlsbad CA
Jeffrey A. Lorbeck - San Diego CA

Qualcomm Inc - San Diego CA

H04B 7185

455 121

A method and apparatus useful for determining the accumulated error in a user terminal dock in a satellite communications system. The satellite communications system includes a gateway, a satellite with a known position and known velocity, and a user terminal having a deskew buffer clocked by a user terminal clock. The method includes the steps of computing the one-way signal delay between the satellite and the user terminal, computing a desired deskew buffer delay based on the computed one-way signal delay and a predetermined maximum value of said one-way signal delay, and computing the accumulated error in the user terminal clock based on the desired deskew buffer delay and the actual deskew buffer delay.