Research on GRI Combination Design of eLORAN System

LIU Shiyao; ZHANG Shougang; HUA Yu

doi:10.11999/JEIT201066

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LIU Shiyao, ZHANG Shougang, HUA Yu. Research on GRI Combination Design of eLORAN System[J]. Journal of Electronics & Information Technology. doi: 10.11999/JEIT201066

Citation:

LIU Shiyao, ZHANG Shougang, HUA Yu. Research on GRI Combination Design of eLORAN System[J]. Journal of Electronics & Information Technology. doi: 10.11999/JEIT201066

LIU Shiyao, ZHANG Shougang, HUA Yu. Research on GRI Combination Design of eLORAN System[J]. Journal of Electronics & Information Technology. doi: 10.11999/JEIT201066

Citation:

LIU Shiyao, ZHANG Shougang, HUA Yu. Research on GRI Combination Design of eLORAN System[J]. Journal of Electronics & Information Technology. doi: 10.11999/JEIT201066

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Research on GRI Combination Design of eLORAN System

doi: 10.11999/JEIT201066

LIU Shiyao^{1, 3, 4
,
,},
ZHANG Shougang^{1, 2},
HUA Yu^{1, 3}

1.
National Time Service Centre, Chinese Academy of Sciences, Xi’an 710600, China
2.
Key Laboratory of Time and Frequency Reference, Chinese Academy of Sciences, Xi’an 710600, China
3.
Key Laboratory of Precision Navigation and Timing Technology, Chinese Academy of Sciences, Xi’an 710600, China
4.
University of Chinese Academy of Sciences, Beijing 100049, China

Funds: The National Natural Science Foundation of China (11803040), The Key Research Program of Frontier Sciences of CAS (QYZDJ-SSW-JSC034)

Received Date: 2020-12-18
Accepted Date: 2021-07-12
Rev Recd Date: 2021-07-12

Available Online: 2021-12-08

Abstract

Abstract

To solve the problem of Group Repetition Interval (GRI) selection in the construction of the enhanced LORAN (eLORAN) system supplementary transmission station, a screening algorithm based on cross interference rate is proposed mainly from the mathematical point of view. Firstly, this method considers the requirement of second information, and on this basis, conducts a first screening by comparing the mutual Cross Rate Interference (CRI) with the adjacent Loran-C stations in the neighboring countries. Secondly, a second screening is conducted through permutation and pairwise comparison. Finally, the optimal GRI combination scheme is given by considering the requirements of data rate and system specification. Then, in view of the high-precision timing requirements for the new eLORAN system, an optimized selection is made in multiple optimal combinations. The analysis results show that the average interference rate of the optimal combination scheme obtained by this algorithm is comparable to that between the current navigation chains and can take into account the timing requirements, which can provide referential suggestions and theoretical basis for the construction of high-precision ground-based timing system.
- Loran-C,
- Enhanced LORAN (eLORAN),
- Group Repetition Interval (GRI),
- Time Of Coincidence Interval (TOCI),
- Cross-Rate Interference (CRI)

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References(15)

References

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