NCR clock recovery method suitable for DVB-S2/RCS2 systems

In general two-way satellite communication systems based on TDMA(Time Division Multiple Access) require network clock synchronization among hub and terminals. This paper describes basic concepts about NCR(Network Clock Reference) clock recovery method which offers hub station timing information to all network terminals. In addition, we proposes an appropriate PLL(Phase Locked Loop) structure in terms of supporting CCM(Constant Coding and Modulation) mode as well as ACM(Adaptive Coding and Modulation) mode which optimize system throughput by changing code rate and modulation.