Design and Optimize FQPSK Modulation Concatenated with LDPC Code for Space Information Network

DOI

10.2991/icitmi-15.2015.170How to use a DOI?

Keywords

FQPSK; LDPC; coded modulation; space information network

Abstract

Because of the limited power and long propagation distance between spacecraft and Earth station, the high power efficiency is more important for space information system than others terrestrial communication system. Motivated by the potentially large gain achievable with iterative decoding, one novel coded modulation scheme based on LDPC code and FQPSK (Feher’s QPSK) is designed and optimized in this paper, which can alleviate the challenge of signal power huge loss of communications path in space information system. The novel scheme improves power efficiency utilizing the property that LDPC code enables communication at very low signal noise rate and constant envelope property of FQPSK enables high power amplifier work at saturation states without nonlinear impact. At receiver, using iterative receive algorithm, large gain can be attained. The paper proposes concatenation scheme and optimizes it by computer assisted simulation. At last, the bit error rate performance of optimal scheme is confirmed.

Copyright

© 2015, 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  - Zhi-Dong Xie
AU  - Chao He
AU  - Jing Hu
AU  - Dong-Ming Bian
PY  - 2015/10
DA  - 2015/10
TI  - Design and Optimize FQPSK Modulation Concatenated with LDPC Code for Space Information Network
BT  - Proceedings of the 4th International Conference on Information Technology and Management Innovation
PB  - Atlantis Press
SP  - 1009
EP  - 1014
SN  - 2352-538X
UR  - https://doi.org/10.2991/icitmi-15.2015.170
DO  - 10.2991/icitmi-15.2015.170
ID  - Xie2015/10
ER  -