Title :
A novel method of multipath mitigation for C/A code tracking loop based on wavelet transform
Author :
Xue Bing ; Gai Meng ; Shen Feng ; Liu Na
Author_Institution :
Autom. Sch., Harbin Eng. Univ., Harbin, China
Abstract :
Multipath is one of main errors in GPS and other spread spectrum systems, it seriously affects the performance of the navigation receiver. In this paper the correlation model under multipath signal is analyzed and we analyze the characteristics of the autocorrelation function starting with it, then a method of detecting jumping-off point of autocorrelation function based on wavelet analysis is proposed, further more, the discriminator result is got to adjust the C/A phase in DLL. Theory analysis and simulation results show that the method is not restricted by the numbers of multipath and sky-wave interference, and better multipath mitigating performance can be acquired than narrow correlation.
Keywords :
Global Positioning System; codes; correlation methods; interference suppression; spread spectrum communication; wavelet transforms; C-A code tracking loop; DLL; autocorrelation function; correlation model; gps; jumping-off point detection method; multipath mitigating performance; multipath signal; navigation receiver; sky-wave interference; spread spectrum system; wavelet analysis; wavelet transform; Correlation; Correlators; Delay; Interference; Tracking loops; Wavelet transforms; Autocorrelation function; Multipath mitigation; Spread spectrum system; Wavelet transform;
Conference_Titel :
Information and Automation (ICIA), 2011 IEEE International Conference on
Conference_Location :
Shenzhen
Print_ISBN :
978-1-4577-0268-6
Electronic_ISBN :
978-1-4577-0269-3
DOI :
10.1109/ICINFA.2011.5949085
