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Method of and a system for estimating the frequency uncertainty of a mobile radio system able to use two different mobile radio networks
Method of and a system for estimating the frequency uncertainty of a mobile radio system able to use two different mobile radio networks
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机译:用于估计能够使用两个不同的移动无线电网络的移动无线电系统的频率不确定性的方法和系统
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摘要
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/n), t+(2T/n), . . . , t+(nT/n), 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.
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