A multiple correlation peak value detecting method for frame synchronization of DVB-S2

In this paper, we present an enhanced algorithm for frame synchronization for DVB-S2 system. The scheme is based on multiple correlation peak value detection to achieve frame synchronization. By further analyzing the structure of the Physical Layer Header (PLHEADER) that consists of Start of Frame (SOF) and Physical Layer Signaling Code (PLSC), we find some useful properties that can enhance the frame synchronization. We also introduce some optimizations into the algorithm. Especially, the modifications made on the peak search algorithm improve the performance of the frame synchronization. The experimental results show that the frame synchronization can be achieved under large carrier frequency offset (as large as 5 MHz at 25 MSps) and low SNR threshold of -2.3 dB. Compared with previously proposed approaches, the scheme described in this paper takes less time to acquire frame synchronization and seems to be more flexibility.