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Direct Digital Frequency Control Based on the Phase Step Change Characteristic between Signals |
| Zhao-Min Jia1,2,4**, Xu-Hai Yang1,2,3, Bao-Qi Sun1,2,3, Xiao-Ping Zhou5, Bo Xiang4, Xin-Yu Dou4 |
1National Time Service Centre, Chinese Academy of Sciences, Xi'an 710600
2School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049
3Key Laboratory of Precise Positioning and Timing Technology, Chinese Academy of Sciences, Xi'an 710600
4Intelligence and Information Engineering College, Tangshan University, Tangshan 063020
5China Academy of Space Technology (Xi'an), Xi'an 710000
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Zhao-Min Jia, Xu-Hai Yang, Bao-Qi Sun et al 2017 Chin. Phys. Lett. 34 090601 |
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Abstract We present a new digital phase lock technology to achieve the frequency control and transformation through high precision multi-cycle group synchronization between signals without the frequency transformation circuit. In the case of digital sampling, the passing zero point of the phase of the controlled signal has the phase step characteristic, the phase step of the passing zero point is monotonic continuous with high resolution in the phase lock process, and using the border effect of digital fuzzy area, the gate can synchronize with the two signals, the quantization error is reduced. This technique is quite different from the existing methods of frequency transformation and frequency synthesis, the phase change characteristic between the periodic signals with different nominal is used. The phase change has the periodic phenomenon, and it has the high resolution step value. With the application of the physical law, the noise is reduced because of simplifying frequency transformation circuits, and the phase is locked with high precision. The regular phase change between frequency signals is only used for frequency measurement, and the change has evident randomness, but this randomness is greatly reduced in frequency control, and the certainty of the process result is clear. The experiment shows that the short term frequency stability can reach 10$^{-12}$/s orders of magnitude.
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Received: 19 June 2017
Published: 15 August 2017
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| Fund: Supported by the National Natural Science Foundation of China under Grant No 11173026, and the International GNSS Monitoring and Assessment System (iGMAS) of National Time Service Centre. |
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| [1] | Sturm S, Köhler F, Zatorski J et al 2014 Nature 506 467 | | [2] | Yu J G, Zhou W, Du B Q et al 2012 Chin. Phys. Lett. 29 070601 | | [3] | Li Z Q, Zhou W, Chen F X et al 2010 Chin. Phys. B 19 090601 | | [4] | Diddams S A, Bergquist J C, Jefferts S R and Oates C W 2004 Science 306 1318 | | [5] | Schröder G F, Levitt M and Brunger A T 2010 Nature 464 1218 | | [6] | Bosco G C, Garcocz M, Lind K, Pogliano U, Rietveld G, Tarasso V, Voljc B and Zachovalová V N 2011 IEEE Trans. Instrum. Meas. 60 2359 | | [7] | Zhou W, Zhou H, Fan W J, Wang H, Qian S X and Jiang W N 2008 Proc. IEEE Int. Frequency Control Symp. (USA Honolulu 19–21 May 2008) p 468 | | [8] | Miao M, Zhou W and Wang B 2012 Rev. Sci. Instrum. 83 024706 | | [9] | Bai L N, Cao Y H, Liu L J et al 2014 Chin. Phys. Lett. 31 098402 | | [10] | Ye Y X, Xuan Z Q, Gu J F et al 2014 Chin. Phys. B 23 120601 | | [11] | Ihlefeld C M, Burns B M and Youngquist R C 2013 IEEE Trans. Instrum. Meas. 62 205 | | [12] | Lee K Y et al 2012 IEEE Trans. Instrum. Meas. 61 2924 | | [13] | Zhou W, Li Z Q, Bai L N et al 2014 Chin. Phys. Lett. 31 100602 | | [14] | Bai L N, Su X, Zhou W et al 2015 Rev. Sci. Instrum. 86 015106 | | [15] | Sesia I, Galleani L and Tavella P 2011 IEEE Trans. Aerosp. Electron. Syst. 47 884 | | [16] | Anne L C, Jürgen A, Jelmer J R, Daniel O, Niels K and Eugene S P 2010 New J. Phys. 12 065032 |
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