中国物理B ›› 2015, Vol. 24 ›› Issue (12): 120601-120601.doi: 10.1088/1674-1056/24/12/120601
白丽娜, 叶波, 宣美娜, 金瑜珍, 周渭
Bai Li-Na (白丽娜), Ye Bo (叶波), Xuan Mei-Na (宣美娜), Jin Yu-Zhen (金瑜珍), Zhou Wei (周渭)
摘要: Limited detection resolution leads to fuzzy areas during the measurement, and the discrimination of the border of a fuzzy area helps to use the resolution stability. In this way, measurement precision is greatly improved, hence this phenomenon is named the border effect. The resolution fuzzy area and its application should be studied to realize high-resolution measurement. During the measurement of any frequency signal, the fuzzy areas of phase-coincidence detection are always discrete and irregular. In this paper the difficulty in capturing the border information of discrete fuzzy areas is overcome and extra-high resolution measurement is implemented. Measurement precision of any frequency-signal can easily reach better than 1× 10-11/s in a wide range of frequencies, showing the great importance of the border effect. An in-depth study of this issue has great significance for frequency standard comparison, signal processing, telecommunication, and fundamental subjects.
中图分类号: (Time and frequency)