The research of Q-ary LDPC codes in the navigation system

DOI

10.2991/icmit-16.2016.27How to use a DOI?

Keywords

Navigation system; Q-ary; LDPC; EMS; maximum information entropy

Abstract

In navigation system, due to the long distance between earth and satellites, the external environment noise may affect the service quality of information transmission system. To improve the capacity of anti-jam satellite communications, in this paper, an efficient construction algorithm for Q-ary LDPC code based on maximum information entropy is put forward, which brings extra gain to satellite communications system. The algorithm transforms the LDPC code check matrix H of the PEG method. By exchanging the "1" in the matrix with the generated element groups, the non-binary LDPC code H matrix is achieved. Simulation results demonstrate that the proposed algorithm achieves about 0.2dB performance improvement compared with the random replacement method. Moreover, compared with the non-binary LDPC codes based on maximum information entropy exploited in GPS LDPC codes with the same code length and code rate, our proposed algorithm yields a better performance than that in GPS application scenarios.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Xu Yi
AU  - Daoxing Guo
AU  - Wei You
PY  - 2016/04
DA  - 2016/04
TI  - The research of Q-ary LDPC codes in the navigation system
BT  - Proceedings of the 2016 3rd International Conference on Mechatronics and Information Technology
PB  - Atlantis Press
SP  - 141
EP  - 145
SN  - 2352-538X
UR  - https://doi.org/10.2991/icmit-16.2016.27
DO  - 10.2991/icmit-16.2016.27
ID  - Yi2016/04
ER  -