Research for acquisition of Galileo E1 OS signals

CHEN Jie^1,2,3, LU Xiao-chun^1,2, HE Cheng-yan^1,2,3

1. National Time Service Center, Chinese Academy of Sciences, Xi′an 710600, China;

2. Key Laboratory of Precision Navigation and Timing Technology, National Time Service Center,

Chinese Academy of Science, Xi′an 710600, China;

3. University of Chinese Academy of Sciences, Beijing 100039, China

Abstract: To obtain a better performance of acquisition, and solve two problems of acquisition of Galileo E1 OS(Open service) signals: not exploiting the signal power adequately and multiple peaks autocorrelation function allowing lock on secondary peaks with a non-zero probability, we designed a new method using BPSK-like technology and joint data/pilot acquisition strategies for acquisition of Galileo E1 OS signals after the analysis of the foregoing problems. Then we analyzed the real signals using the method. The results displayed an ideal acquisition figure which had a standard waveform and low secondary peaks.

Key words: Galileo E1 OS; CBOC; signal acquisition; BPSK-like technology; GIOVE-B