吉林大学学报(工学版) ›› 2017, Vol. 47 ›› Issue (5): 1617-1624.doi: 10.13229/j.cnki.jdxbgxb201705039

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Joint strategy for high sensitivity Galileo E1B/C signal acquisition

LUO Shi-dong1, 2, BA Xiao-hui1, WANG Yun1, CHEN Jie1   

  1. 1.Institute of Microelectronics of Chinese Academy of Sciences, Beijing 100029, China;
    2.University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2016-06-13 Online:2017-09-20 Published:2017-09-20

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Abstract: High sensitivity acquisition architecture for Galileo E1 signal is proposed. This architecture processes E1B/C signals by time-division multiplexing, and then joins the results together. Compared with individual E1B or E1C channel acquisition, higher detection probability is achieved without the increase in hardware burden. In addition, a novel decision strategy, named threshold combining code phase, is also proposed. The strategy utilizes threshold and the code phase correlation of correct cell between multiple Intermediate Frequency (IF) data replays with different starting point of each replay. Compared with traditional threshold decision strategy based constant false alarm rate, the proposed strategy enhances the detection probability. When overall false probability is 0.002 and Carrier to Noise Ratio (CNR) downs to 27 dBHz, the number of acquisition rounds is 2, and the top 10 maximum values are retained in each round, the overall detection probability of the decision strategy is near 40%, while the overall detection probability of the traditional threshold decision strategy is less than 10%.

Key words: communication technology, Galileo E1 signal acquisition, IF signal replay, threshold combines with code phase, high sensitivity

CLC Number: 

  • TN967.1
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