LUO Rui, LIU Li, TONG Rui, et al. High-Resolution Group Delay Measurement and Calculation Method Based on Tikhonov Regularization[J]. Acta Electronica Sinica, 2019, 47(5): 1044-1048.
LUO Rui, LIU Li, TONG Rui, et al. High-Resolution Group Delay Measurement and Calculation Method Based on Tikhonov Regularization[J]. Acta Electronica Sinica, 2019, 47(5): 1044-1048. DOI: 10.3969/j.issn.0372-2112.2019.05.010.
Group delay is a very important indicator when measuring the impact of a transmission network on signal transmission time delay and signal distortion.The calculation of group delay based on the difference method is a commonly used in current measuring instruments
and there is a contradiction between frequency resolution and precision.It will inevitably lead to the decrease of measurement accuracy while improving the frequency resolution.Based on the analysis of the error source of the difference method
this paper presents a novel method of group delay measurement based on the Tikhonov regularization.The comparative analysis shows that the method can obtain the group delay value more precisely with higher frequency resolution when the measurement error is included.In the actual data calculation and verification
the validity of the method verified by comparison to the group delay data obtained by the vector network analyzer.