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논문 기본 정보

자료유형
학술대회자료
저자정보
Jae-Won Kho (유한대학) Ki-Seok Kwak (연세대학교)
저널정보
대한전자공학회 ICEIC : International Conference on Electronics, Informations and Communications ICEIC : 2010
발행연도
2010.6
수록면
487 - 490 (4page)

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In this paper, a new signal processing methodology which is able to measure a load impedance with high accuracy and resolution is implemented. This methodology is characterized by a chirp signal with Gaussian envelope which enables one to achieve time localization and to assign energy in the frequency band of interest at the same time. For an evaluating the reflection coefficient and estimating the fault distance on a cable a normalized time-frequency crosscorrelation function is utilized, and a cross time-frequency distribution function is used to acquire the phase difference between the inputs and the reflected signals. The real impedance measurement experiments have been carried out by using a time-frequency domain reflectometry(TFDR) system on a coaxial cable with various sorts of terminal resistors. The experimental results of the TFDR based impedance measurement are compared with those of the commercial time domain reflectometry(TDR). The proposed TFDR based impedance measurement methodology shows that it is able to evaluate the location of fault on a coaxial cable and it can offers information of the fault as the load impedance.

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Abstract
Ⅰ. Introduction
Ⅱ. Evaluation of the Load Impedance by TFDR
Ⅲ. Experimental Setup and Results
Ⅳ. Coclusions
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