Method of and a system for estimating the frequency...

Details Method of and a system for estimating the frequency... Method of and a system for estimating the frequency...

2005-08-23

2005-08-23

Chin, Vivian (Department: 2682)

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

C455S553100, C455S550100, C455S076000, C455S502000, C455S436000, C375S219000, C375S354000, C375S356000, C370S503000

Reexamination Certificate

active

06934559

ABSTRACT:
In a method of estimating the relative frequency uncertainty between two parts of a mobile radio system able to communicate via two mobile radio networks at first and second particular frequencies, each part of the mobile radio system has a clock from which the particular frequency is derived and the uncertainty is estimated by measuring the number of pulses of each of the clocks during a time window of duration T starting at a time t. The method includes the following steps, with the time window T sliding:a) measuring the number of pulses of each of the clocks at n intermediate times t+(T
), t+(2T
), . . . , t+(nT
), where n is a positive integer,b) storing the numbers of clock pulses thereby obtained in memory,c) calculating the relative frequency uncertainty at time t+T from the numbers of clock pulses stored in memory.

REFERENCES:
patent: 3872455 (1975-03-01), Fuller et al.
patent: 6066964 (2000-05-01), Meneghini
patent: 6311081 (2001-10-01), Northcutt et al.
patent: 6549064 (2003-04-01), Bandy et al.
patent: 2001/0011914 (2001-08-01), Pornet
patent: 2002/0155862 (2002-10-01), Ormson
patent: WO 0129980 (2001-04-01), None

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