LDACS1 stands for L-band digital aeronautical communications system, type 1. It is the most promising and mature candidate for the future air-to-ground communications standard LDACS and, therefore, an important data link technology within the future communications infrastructure for aviation. LDACS1 is a broadband system based on OFDM modulation. It shares many technical features with 3G and 4G wireless communications systems.
Researchers of the University of Salzburg developed the data link layer protocols of the LDACS1 system. Learn more at http://www.ldacs.com/