Comparison of Three Acquisition Methods for Dual-Frequency Receiver
L2 Civil signal (L2C) is the second Global Positioning System (GPS) civilian signal for all users.When combined with L1 C/A in a dual-frequency receiver,it allows users to correct ionosphericdelay.In addition,the synchronized ranging codes on the L1-C/A and L2C signals can be used for combined processing to enhance the acquisition sensitivity.Because of the unusually-long ranging codes used in L2C signal,both the search space and the computational complexity for signal acquisition become unacceptable.However combined processing of the L1-L2C signal can overcome this drawback.In this paper,three methods for joint L1-L2 signal acquisition are introduced.One is L1 aiding method.The second is post-correlation method.The third is adaptive code processing scheme.Comparison of the three methods” theoretical probabilities of false alarm and detection is provided.Using Monte Carlo simulations verify the theoretical derivations.Thenthe drawbacks for three methods will be detailed and a robust integrated method is proposed in this paperto improve the performance.Finally this method is verified with simulation.Although the methods focus on the GPS dual-frequency,the similar principles could be used in the BeiDou dual-frequency receiver.
Dual-Frequency Acquisition Signal Processing
Shaohua Chen Hongzhou Yang Yang Gao
Department of Geomatics Engineering, The University of Calgary, Canada
国内会议
长沙
英文
1-9
2016-05-01（万方平台首次上网日期，不代表论文的发表时间）