Title :
A New Direct Decimation Algorithm for Digital Down-Conversion of GPS Satellite Signal
Author :
Li Hui ; Hao Jianjun ; He Qiusheng ; Cheng Yaqi
Author_Institution :
China Univ. of Min. & Technol., Beijing
Abstract :
In order to simplify satellite navigation receiver architecture, a down conversion method based on digital signal decimation is proposed. By using separating and accumulating method, direct down-conversion of a digitized carrier signal with relative high frequency is realized. This method has virtues of simpler structure, high speed and less calculation. Also it can well preserve navigation message and Doppler information, whereas it may degrade the S/N of signal and sensitivity of receiver. Analysis and simulation results show that it has no effect on positioning precision of receiver.
Keywords :
Global Positioning System; Doppler information; GPS satellite signal; digital down-conversion; digital signal decimation; direct decimation algorithm; receiver positioning precision; receiver sensitivity; satellite navigation receiver architecture; separating-accumulating method; Binary phase shift keying; Energy consumption; Filters; Frequency conversion; Global Positioning System; Helium; Microelectronics; Receivers; Satellite broadcasting; Satellite navigation systems;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2007. WiCom 2007. International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-1311-9
DOI :
10.1109/WICOM.2007.314
