Open AccessAdaptive modulation and coding techniques for global navigation satellite system inter‐satellite communication based on the channel condition
Author(s) -
Huang Jinhui,
Su Yingxue,
Liu Wenxiang,
Wang Feixue
Publication year - 2016
Publication title -
iet communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.355
H-Index - 62
eISSN - 1751-8636
pISSN - 1751-8628
DOI - 10.1049/iet-com.2016.0093
Subject(s) - gnss applications , computer science , satellite system , real time computing , link adaptation , satellite navigation , coding (social sciences) , satellite , communications satellite , carrier to noise ratio , spectral efficiency , channel (broadcasting) , global positioning system , electronic engineering , algorithm , fading , telecommunications , mathematics , engineering , statistics , aerospace engineering
Inter‐satellite link (ISL) will play an increasingly important role in the next generation of global navigation satellite system (GNSS). The inter‐satellite distances in the GNSS vary greatly, resulting in a power loss difference of as much as 20 db. However, there are no reports on promotion of spectral efficiency in inter‐satellite channels at present. In this study, the authors propose an efficient utilisation of the adaptive modulation and coding (AMC) scheme for ISLs in the GNSS. A novel method, based on inter‐satellite distance, is presented for choosing the modulation and coding scheme (MCS). The proposed method provides a convenient way to estimate signal‐to‐noise ratio of the ISLs in GNSS. This AMC technique is implemented according to two different algorithms. One is the target bit error rate (BER) algorithm based on inter‐satellite distance, aimed at keeping the BER below a target limit. The other is the maximum throughput algorithm based on inter‐satellite distance, aimed at maximising the data throughput. In cases where the inter‐satellite distance is short, simulation results show that, under the premise of the same transmission power, the throughput of two proposed AMC schemes is nearly six times that of a fixed MCS.