Design of Frame Synchronization in ACM Scheme of DVB-S2 with RM Code

The algorithm analysis of frame synchronization techniques with RM code were given for the adaptive coding and modulation (ACM) scheme in next generation satellite digital video broadcasting (DVB-S2). Based on maximum likelihood criterion, the principle of decoding RM code by fast Hadamard transformation (FHT) was analyzed. As the differential correlation detection method was employed to detect the location of frame header, a method to improve the frame error rate performance of RM decoding was presented. After combining the odd header symbols with the conjunction of even frame header symbols, the decoding performance will be robust to any phase offsets with low implementation complexity.