Composite binary offset carrier modulated signals are applied to the new-generation satellite radio navigation systems (SRNSs). The block diagram of the CBOC-signal satellite transmitter is dependent on the coherent adaptive subcarrier modulation (CASM) algorithm. The Composite Binary Offset Carrier modulation is a specific execution of the Multiplexed Binary Offset Carrier modulation. CBOC is utilized by Galileo satellite signals. It is shaped by the expansion or deduction of two weighted sine binary offset carrier modulations.