Abstract
Abstract The technology of direction finding is very important to make high position fixing accuracy. TDOA(time difference of arrival) direction finding technology is a high accuracy technology and is used in RF system from 1990. The principle of TDOA is to receive an emitter signal with two antennas, measure the time difference of received signal and then convert the time differences to azimuth angle. For high DF(direction finding) accuracy long basis line and high SNR at receiving system are needed. The DF accuracy and position fixing accuracy are simulated with different SNRs and antenna base lines. We obtain the DF accuracy of 0.51 o at 0 o incident azimuth angle in case of 50m base line and 40dB SNR. Key Words : Position Fixing, SNR, Direction Finding, TDOA, CEP, Position Error Received 27 September 2014, Revised 27 October 2014Accepted 20 November 2014Corresponding Author: Gyoo-Soo Chae(Baekseok University) Email: gschae@bu.ac.krⒸ The Society of Digital Policy & Management. All rights reserved. This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0), which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is ISSN: 1738-1916 properly cited.
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