Title :
Method and its optimization for group delay measurement of Frequency-Translating Devices by using double-frequency phase difference method
Author :
Changjun, Yu ; Jie, Lin
Author_Institution :
Res. Inst. of Electron. Eng., Harbin Inst. of Technol., Weihai, China
Abstract :
Group delay is a key parameter describing the phase characteristic of the signal transmission system, which can also measure the phase linearity of the continuous signal passing through transmission system. The group delay of Frequency-Translating Devices (FTD) is measured by the double-frequency phase difference method in this paper. But the measurement error will increase in the FTD whose group delay changes greatly. In view of this problem, an optimization method is put forward. Combined with polynomial fitting of high order, this proposed method, which uses the reasonable selection of the parameters such as measuring aperture and measurement interval, can improve the measurement precision and the test efficiency.
Keywords :
frequency convertors; optimisation; polynomials; double-frequency phase difference method; frequency-translating device; group delay measurement; optimization; phase linearity; polynomial fitting; signal transmission system; Apertures; Delay; Extraterrestrial measurements; Frequency measurement; Measurement uncertainty; Optimization; Phase measurement; FTD; double-frequency phase difference method; group delay;
Conference_Titel :
Electronic Measurement & Instruments (ICEMI), 2011 10th International Conference on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4244-8158-3
DOI :
10.1109/ICEMI.2011.6037948