LDPC coded MSK-BOC modulation for satellite navigation system

Signal structure is one of the decisive factors of the inherent performance of satellite navigation system, meanwhile it is one of the critical technologies which must be resolved during system design and upgrading process. In order to improve code tracking precision and have the better bit error rate (BER) ability at the same time, we combine low-density party-check (LDPC) codes and minimum shift keying (MSK) with binary offset carrier (BOC), which called LDPC coded MSK-BOC (LDPC-MSK-BOC). Theoretic analysis and simulation results show that the proposed signal system can not only achieve lower BER, but also have better performance in the aspects of Multipath Error, code tracking error and Gabor Bandwidth. Meanwhile, the proposed signal structure can provide potential opportunities for Global Navigation Satellite System (GNSS) modernization and construction, such as Galileo, Compass, and so on.