A Study of the Satellite Interferer Positioning in Taiwan’s Environment

• Main Authors: Kai-Horng Cheng, 鄭凱鴻
• Other Authors: Ken-Huang Lin
• Format: Others
• Language: zh-TW
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/47415916435252289854

碩士 === 國立中山大學 === 通訊工程研究所 === 93 === In this thesis, the positioning accuracy of the techniques in Taiwan’s environment can be estimated by using the existing positioning algorithms. The satellite interferer location techniques for geostationary satellites can produce an error ellipse by measuring time difference of arrival (TDOA) and frequency difference of arrival (FDOA) between two signals which pass through the different uplink and downlink path of two satellites. In order to reduce the positioning error of the TDOA/FDOA technique, we proposed a method that using a helicopter to achieve the multibeam antenna (MBA) positioning. Using angle measurement, the positioning is carried out by fitting the measured power ratio of the interference signals received by the multibeam antenna to the gain ratio of the beams as a function of the incoming angle. This hybrid positioning technique was shown to reduce the positioning error and search area of the error ellipse.