Journal of Systems Engineering and Electronics
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Yannian Lou, Chaojie Zhang*, Xiaojun Jin, and Zhonghe Jin
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Abstract:
In a system based on the phase lock loop (PLL), a trade-off must be made between the tracking precision and the dynamic performance if constant parameters are adopted. To overcome this drawback, a new method called no phase slipping adaptive bandwidth (NPS-AB) is proposed, which can adjust the loop bandwidth adaptively for different working conditions. As a result, both the tracking precision and the dynamic performance can be achieved concurrently. NPS-AB has two features to keep the loop stable: one is the capability of quick response to dynamics; the other is a series of additional constraints when the bandwidth is switched. Compared with other methods, there is no phase slipping during the adjustment process for NPS-AB. The phase integer ambiguity can be avoided and the phase value is kept valid. It is meaningful for carrier ranging systems. Simulation results show that NPS-AB can deal with sudden dynamics and keep the pseudo-range value stable in the entire dynamic process.
Yannian Lou, Chaojie Zhang, Xiaojun Jin, and Zhonghe Jin. Method of adaptive PLL bandwidth adjustment without phase slipping[J]. Journal of Systems Engineering and Electronics, doi: 10.1109/JSEE.2014.00109.
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URL: https://www.jseepub.com/EN/10.1109/JSEE.2014.00109
https://www.jseepub.com/EN/Y2014/V25/I6/949