Title :
A novel time-varying Doppler frequency synthesizer
Author :
Xiang, Yang ; Hu, Xiulin
Author_Institution :
Dept. of Electron. & Inf. Eng., Huazhong Univ. of Sci. & Technol., Wuhan
Abstract :
A novel time-varying Doppler frequency synthesizer is presented in this paper. Time-varying Doppler frequency synthesis is one of the most critical problems in high dynamic GPS signal simulator. The presented frequency synthesizer which may be easily implemented by software and hardware in digital domain can accurately control Doppler frequency and its derivatives of generated signals by means of designing inputting controlling words of carrier NCO, so as to accurately simulate received time-varying carrier Doppler frequency arising from high dynamics between satellites and GPS receivers. Experiment results confirm the correctness and validity of the proposed scheme.
Keywords :
Doppler shift; Global Positioning System; frequency synthesizers; time-domain analysis; GPS receivers; GPS signal simulator; digital domain; received time-varying carrier frequency; time-varying Doppler frequency synthesizer; Aircraft navigation; Frequency synthesizers; Global Positioning System; Hardware; RF signals; Satellite navigation systems; Signal design; Signal generators; Signal processing; Signal synthesis;
Conference_Titel :
Signal Processing, 2008. ICSP 2008. 9th International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-2178-7
Electronic_ISBN :
978-1-4244-2179-4
DOI :
10.1109/ICOSP.2008.4697502
