Open AccessOptimizing the co‐design of message structure and channel coding to reduce the TTD for a Galileo 2nd generation signal
Author(s) -
Ortega Lorenzo,
Poulliat Charly,
Boucheret Marie Laure,
AubaultRoudier Marion,
AlBitar Hanaa
Publication year - 2020
Publication title -
navigation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.847
H-Index - 46
eISSN - 2161-4296
pISSN - 0028-1522
DOI - 10.1002/navi.382
Subject(s) - computer science , coding (social sciences) , channel (broadcasting) , channel code , gnss applications , real time computing , algorithm , decoding methods , global positioning system , telecommunications , mathematics , statistics
Abstract Recently, the joint design of the GNSS message structure and the associated channel‐coding scheme have been investigated as a means to reduce the Time‐To‐First‐Fix (TTFF) and particularly the time to retrieve the Clock and Ephemerides Data (CED). In this context, a new method to co‐design the navigation message and the channel‐coding scheme structure is proposed in this paper. This new co‐design enables us to reduce the time to retrieve the CED while enhancing error‐correction capabilities under degraded channel conditions. In order to fulfill such requirements, some structured coding schemes are designed, which provide both maximum distance separable (MDS) and full diversity properties under a non‐ergodic channel assumption.