Method and apparatus for controlling a frequency source

Details Method and apparatus for controlling a frequency source Method and apparatus for controlling a frequency source

2007-07-18

2009-08-18

Issing, Gregory C (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a satellite

Reexamination Certificate

active

07576689

ABSTRACT:
A method is provided for controlling a clock for use in a frequency source. In the method a time bias is determined by determining the Accumulated Doppler Range of a signal source at different time intervals. The drift of a local clock is determined by determining the difference between the different time intervals and the clock may then be corrected. Apparatus is also provided and the invention has particular application to a multilateration system.

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European Search Report dated Nov. 22, 2007 (Six (6) pages).
Great Britain Search Report dated Nov. 20, 2006 (Seven (7) pages).

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