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| Loran-C Signal Fast Acquisition Method and Its Performance Analysis |
| Li Shi-feng①②③ Wang Yu-lin① Hua Yu①③ Yuan Jiang-bin①② |
①(National Time Service Center, Chinese Academy of Sciences, Xi’an 710600, China)
②(University of Chinese Academy of Sciences, Beijing 100039, China)
③(Key Laboratory of Precision Navigation and Timing Technology, Chinese Academy of Sciences, Xi’an 710600,China) |
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Abstract The combination of Loran-C and Global Navigation Satellite System (GNSS) has become a?new?application?mode, which provides reliable positioning, navigation and timing service for users. Based on the research on Loran-C signal system, considering its long signal acquisition time and poor anti-noise performance of Loran-C receiver, this paper proposes a new method of anti-noise and fast acquisition for Loran-C signal, which is based on delay correlation; and verifies the practicality of this method by theoretical analysis and carrying out simulation test. This method solves successfully the problem of fast acquisition of Loran-C signal in heavy noise environment. The result shows that the acquisition time of this method is less than 200 ms, the anti-noise property is less than -10 dB.
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Received: 18 December 2012
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Corresponding Authors:
Li Shi-feng
E-mail: lishifeng@ntsc.ac.cn
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2013, Vol. 35 
