Processing of Reflective GPS Signals

• Main Authors: Hao-Ying Cheng, 鄭皓盈
• Other Authors: Jyh-Ching Juang
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/20765371995879738701

碩士 === 國立成功大學 === 電機工程學系碩博士班 === 92 === 　　GPS is a proven positioning and navigation system. In addition to providing accurate positioning and timing service, the GPS can be used in remote sensing due to its good resolution and superior coverage. Indeed, the omnipresence of GPS signals can serve as sources in bistatic remote sensing, leading to a cost-effective design. By observing the power distribution of direct GPS signal and reflective GPS signal, attributes of the environment can be extracted. The thesis investigates the relation of the scattering of GPS signal model to the environmental parameters. Properties of GPS signal reflection are reviewed. Moreover, the firmware of GPS receiver is upgraded to detect the reflective signal and monitor the power variation. An experiment is conducted to verify the firmware modification and remote sensing concept. Finally, preliminary results and lesson learned are provided.