Abstract
This paper proposes a method for phase difference measurement based on the principle of progressive phase shift (PPS). A phase difference measurement system based on PPS and implemented in the FPGA chip is proposed and tested. In the realized system, a fully programmable delay line (PDL) is constructed, which provides accurate and stable delay, benefitting from the feed-back structure of the control module. The control module calibrates the delay according to process, voltage and temperature (PVT) variations. Furthermore, a modified method based on double PPS is incorporated to improve the resolution. The obtained resolution is 25 ps. Moreover, to improve the resolution, the proposed method is implemented on the 20 nm Xilinx Kintex Ultrascale platform, and test results indicate that the obtained measurement error and clock synchronization error is within the range of ±5 ps.
Highlights
Precise measurements of phase differences are frequently required in applications of frequency synchronization, satellite navigation, laser ranging finders, communication networks and signal demodulation [1,2,3,4,5,6,7,8,9]
The phase difference measurement evaluation board communicated with the PC via PCI express
Experiments are conducted to evaluate the performance of the proposed phase difference measurement system based on double progressive phase shift (PPS)
Summary
Precise measurements of phase differences are frequently required in applications of frequency synchronization, satellite navigation, laser ranging finders, communication networks and signal demodulation [1,2,3,4,5,6,7,8,9]. Phase difference measurement can be realized by many approaches. Digital signal processing, such as FFT (fast Fourier transformation) [4,7], the cross-correlation [3] and Kalman filtering [5], are widely used phase difference measurement method. These methods usually require a long time to perform the calculations. Precise measurement of phase differences is similar to a time-to-digital
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
