Demodulator algorithm for new generation satellite broadcast standard
Kuang Wang · Journal of Zhejiang University(Engineering Science) · 2005
Through analyzing the 8PSK demodulation algorithm including carrier recovery and clock timing recovery, an all-digital 8PSK demodulator suitable to the next generation digital satellite television standard DVB-S2 was proposed. The carrier recovery algorithm consists of a frequency detector (FD) loop and a modified phase-frequency detector (PFD) loop. Its tracking range exceeds one time symbol-rate. The Gardner TED algorithm was used in the clock timing recovery loop. Results of analysis and computer fixed point simulation were applied to determine the optimal parameter of each loop. The symbol error performance under AWGN was also presented. Simulation result shows that the demodulator's performance is close to theory and realizable, and all algorithms can be implemented in hardware.