A novel GPS signal acquisition algorithm

作者：Li Jie; Wu Renbiao^*; Wang Wenyi; Lu Dan

来源：Advances in Information Sciences and Service Sciences, 2012, 4(17): 597-604.

DOI：10.4156/AISS.vol4.issue17.68

• Acquisition
• Acquisition process
• Code phase
• Computation complexity
• Conventional algorithms
• Doppler
• Frequency resolutions
• GPS signals
• Initial conditions
• Non-linear least squares
• Satellite signals
• Search process
• Signal acquisitions
• Signal frequencies
• Tracking loop
• Tracking program

Signal acquisition of Global Positioning System (GPS) is a search process which is used for the detection of satellite signals and providing initial conditions for the tracking program. The conventional two-dimension-search acquisition method finds the frequency and C/A code phase of the satellite simultaneously, and takes advantage of the correlation character of C/A code to complete acquisition. In addition, further accurate frequency estimation is needed because the frequency resolution of the conventional acquisition algorithm is too low to satisfy the requirement of the tracking loop. A new GPS acquisition algorithm, which not only changes the GPS acquisition process to the parameter estimation problem but also estimates signal frequency with Doppler and code phase in turn, is presented in this paper. It can be shown from the simulation results that without affecting the acquisition results, the computation complexity of new algorithm has been obviously decreased compared with the conventional algorithm.

• 出版日期2012
• 单位天津大学