Co-Design of Message Structure and Channel Coding Scheme to Reduce the Time to CED for a Galileo 2nd Generation New Signal Lorenzo Ortega Espluga, TéSA Charly Poulliat, Marie-Laure Boucheret, ENSEEIHT Marion Aubault, CNES Hanaa Al Bitar, Thales Alenia Space BIOGRAPHIES Lorenzo Ortega Espluga received the Eng. degree in Telecommunication Engineering in 2014, and the M.Sc degree in Telecommunication and Signal Processing in 2016, both from Zaragoza University. In 2016, he coursed the second year of International Master of Electronics Systems for Embedded and Communicating Applications at the INP-ENSEEIHT (University of Toulouse) as an exchange student. Currently he is a PhD student at ENSEEIHT and studies methodologies to optimize the signal structure of the new generation of Galileo. His thesis is funded by CNES (French Space Agency) and Thales Alenia Space. Charly Poulliat received the Eng. degree in Electrical Engineering from ENSEA, Cergy-Pontoise, France, and the M.Sc. degree in Signal and Image Processing from the University of Cergy-Pontoise, both in June 2001. From Sept. 2001 to October 2004, he was a PhD student at ENSEA/University Of Cergy-Pontoise/CNRS and received the Ph.D. degree in Signal Processing for Digital Communications from the University of Cergy-Pontoise. From 2004 to 2005, he was a post-doctoral researcher at UH coding group, University of Hawaii at Manoa. In 2005, he joined the Signal and Telecommunications department of the engineering school ENSEA as an Assistant Professor. He obtained the habilitation degree (HDR) from the University of Cergy-Pontoise in 2010. Since Sept. 2011, he has been a full Professor with the National Polytechnic Institute of Toulouse (University of Toulouse, INP-ENSEEIHT). His research interests are signal processing for digital communications, error control coding and resource allocation. Marie-Laure Boucheret received the Eng. degree in Electrical Engineering from ENST Bretagne, Toulouse, France, and the M.Sc. degree in Signal Processing from the University of Rennes, both in June 1985. In June 1997, she received the Ph.D. degree in Communications from TELECOM ParisTech, and the "Habilitation à diriger les recherches" in June 1999 from INPT University of Toulouse. From 1985 to 1986 she has been a research engineer at the French Philips Research Laboratory (LEP). From 1986 to 1991, she has been an engineer at Thales Alenia Space, first as a project engineer (TELECOM II program) then as a study engineer at the transmission laboratory. From 1991 to 2005 she was a Associated Professor then a Professor at TELECOM ParisTech. Since March 2005 Marie-Laure Boucheret is a Professor at the National Polytechnic Institute of Toulouse (ENSEEIHT - University of Toulouse). She is also with the Signal and Communication group of the IRIT Laboratory. Marion Aubault-Roudier is a radionavigation engineer in the navigation/location signals department in CNES, the French Space Agency, where she is involved in the optimization of GNSS signals. Marion Aubault-Roudier graduated as an electronics engineer in 2011 from ENAC (Ecole Nationale de l’Aviation Civile) in Toulouse, France. She received her PhD in 2015 from the Department of Mathematics, Computer Science and Telecommunications of the INPT (Polytechnic National Institute of Toulouse), France. Hanaa Al Bitar is a GNSS systems engineer at Thales Alenia Space France. She received her Ph.D in RadioNavigation in 2007 form the ENAC, in Toulouse, France, in the field of GNSS receivers. She joined TAS-F in 2012. Her main activities focus on GNSS signal processing, and SBAS Land Earth Stations signal processing and design.