Ultra-resolution phase comparison method combining phase synchronous detection and common frequency source

作者：Du Baoqiang^*; Wang Yanfeng; Zhou Wei; Guo Shuting

来源：Measurement, 2013, 46(1): 374-377.

DOI：10.1016/j.measurement.2012.07.011

• The equivalent phase comparison frequency
• Phase synchronous detection
• Group period
• Phase quantization step

With the improvement of frequency standard comparison and precise frequency and phase processing technique, the high-precision frequency measurement, phase comparison, phase locked loop and signal processing are necessary. Combining phase synchronous detection principle and common frequency source, an ultra-high resolution phase comparison method is presented in this paper. Using the concepts of the equivalent phase comparison frequency, group period phase processing, phase group synchronization and phase quantization step and so on, and the high stability of common frequency source, the resolution with picosecond or subpicosecond can be easily obtained and +/- 1 count error in traditional phase comparison approach can be eliminated. Experimental results show that the measuring precision better than femtosecond in one hour can be achieved in the long-term frequency standard comparison.

• 出版日期2013-1
• 单位郑州轻工业大学