关键词: 频率测量, 时间间隔测量, FPGA, 内插法, 混频器

Abstract:

With the development of electronic technology,the frequency measurement system in the communications,navigation,space science,metrology and other fields are widely used,and thus an increasing demand for high frequency measurements.How to improve the frequency of measurement accuracy,such as,widening the measurement frequency range,high-speed and reliable adaptive frequency measurement can be carried out,is an urgent need to address the problem.Text classification introduced by frequency measurement,combined with the research results,the advantages and disadvantages of each frequency measurement methods are compared.Frequency measurement will be gradually elaborated automated,and has better consistency,which will help reduce errors and improve the measurement accuracy.

Key words: frequency measurement;time-interval measurement;FPGA;interpolation;mixer