Signal structure of the Chinese Area Positioning System |
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Authors: | XiaoChun Lu HaiTao Wu YuJing Bian and Yu Hua |
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Institution: | (1) National Time Service Center, Chinese Academy of Sciences, Xi’an, 710600, China |
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Abstract: | Proper signal structure is very important in the navigation, positioning, and time services of a satellite navigation system.
In this paper, the carrier wave characteristics, ranging code functions, BOC modulation, navigation data rate, the error-correcting
methods, and signal channel resource allocation are discussed in terms of the technical characteristics of the transforming
satellite navigation system and the resources of communication satellites. The results show that dual-frequency of C band
in the Chinese Area Positioning System (CAPS), compound ranging code, a combination of the coarse code and precise code, BOC
modulation, separate-channel transmission of different users are compatible with the satellite navigation system at present.
The experiments show that the current signal structure can meet the demand of CAPS.
Supported by the Major Knowledge Innovation Programs of the Chinese Academy of Sciences (Grant No. KGCX1-21), the National
High Technology Research and Development Program of China (Grant No. 2004AA105030), the National Natural Science Foundation
of China (Grant No. 10453001), and the Major State Basic Research Development Program of China (Grant No. 2007CB815502) |
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Keywords: | signal structure ranging code BOC modulation navigation |
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