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| Measurement Uncertainty Propagation Law for VNA in Frequency Domain Channel Measurement |
| ZHOU Xin1,2,FENG Zhi-gang2,ZHONG Zhang-dui1,BIAN Xin2,AI Bo1,LIU Ke2,GUO Xiao-tao2,ZHAO Xing2 |
1.State Key Laboratory of Rail Traffic Control and Safety, Beijing Jiaotong University, Beijing 100044, China
2.Division of Eletronics and Information Technology, National Institute of Metrology, Beijing 100029, China |
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Abstract The measurement uncertainty is introduced by measurement instruments in frequency domain channel measurement systems. The measurement instrument, Vector Network Analyzer, need to be calibrated before measurement. The uncertainty analysis for various calibration methods is the foundation to make a judicious choice of calibration methods. The uncertainty analysis is based on Monte Carlo method. To account for the correlations between S-parameter measurements for different frequencies, covariance-matrix-based analysis is performed. The experiments in this paper show that correlations have a strong influence on the uncertainties of channel parameter measurements. Based on the quantitative analysis, the “response” calibration is suggested for channel measurements.
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Received: 20 July 2016
Published: 11 August 2017
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2017, Vol. 38 
