A coded modulation design for the INMARSAT geostationary GLONASS augmentation

A coded modulation scheme is proposed to carry out the Global Navigation Satellite System (GLONASS) geostationary augmentation which includes both integrity and navigation functions over the next generation International Maritime Satellite Organization (INMARSAT) satellites. A baseline coded modulation scheme for the GLONASS augmentation broadcast proposes a forward error correction code over a differential phase shift keying (DPSK) modulation. The use of a concatenated code over the same signaling is considered. The proposed coded modulation design is more powerful and robust, yet not overly more complex in system implementation than the baseline scheme. Performance results of concatenated codes over a DPSK signaling used in the design are presented. The sensitivity analysis methodology in selecting the coded modulation scheme is also discussed