Telecommunications – Transmitter and receiver at separate stations – With control signal
Patent
1989-09-29
1992-03-10
Kuntz, Curtis
Telecommunications
Transmitter and receiver at separate stations
With control signal
455316, 3701041, H04B 701
Patent
active
050955381
ABSTRACT:
A Doppler compensating device which conserves power and can be used with hand-held communication devices comprises a phase lock loop for tracking a Doppler phase offset and a Doppler offset calibration loop which generates a Doppler offset curve. The Doppler offset calibration loop extracts Doppler offset points from the phase lock loop, and from these points calibrates a set of three parameters defining the Doppler offset curve using an estimation algorithm such as the least squares algorithm. After the curve is defined, the compensation device extracts points from the Doppler offset curve and deactivates the phase lock loop. This process preserves power within the hand-held communication devices.
REFERENCES:
patent: 3068416 (1962-12-01), Meyer
patent: 3182259 (1965-05-01), Holder
patent: 3364311 (1968-01-01), Webb
patent: 4385401 (1983-05-01), Jagnow et al.
patent: 4513429 (1985-04-01), Roeder
patent: 4689806 (1987-08-01), Von Der Embse
patent: 4726069 (1988-02-01), Stevenson
patent: 4872164 (1989-10-01), Rieger
patent: 4903279 (1990-02-01), Murakami et al.
Bogacz Frank J.
Kuntz Curtis
Motorola Inc.
Urban Edward
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