access icon free New Frequency Standard Comparison System Based on the Group Quantization Phase Processing

A new frequency standard comparison system is proposed based on the group quantization phase processing. By shortening the width of phase coincidence fuzzy area and capturing the best group phase coincidences, we reduce the randomness of the counting gate and improve the measurement precision of the comparison system. The method is based on the Fieldprogrammable gate array (FPGA), which not only retains the advantage using phase synchronization detection technology to overcome the ±1-word counting error, but also accelerates the system response time, simplifies the measurement equipment, and reduces the development cost and power consumption. The experimental results show that the method is reasonable and scientific, and the comparison accuracy of the system can reach the E-12 s-1 level, obviously superior to the measurement accuracy of the traditional frequency standard comparison method, which has a wide application and popularization value.

Inspec keywords: field programmable gate arrays; synchronisation; frequency standards; frequency measurement

Other keywords: counting gate; ±1-word counting error; phase coincidence fuzzy area; group quantization phase processing; traditional frequency standard comparison method; group phase coincidences; phase synchronization detection technology; new frequency standard comparison system; comparison accuracy; Field-programmable gate array; system response time

Subjects: Logic circuits; Measurement standards and calibration; Logic and switching circuits; Frequency measurement

http://iet.metastore.ingenta.com/content/journals/10.1049/cje.2019.01.011
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