Abstract:

The symbol timing synchronization technology is one of the key technologies of the satellite communication system, whose accuracy directly affects the performance of the entire system. In view of the wide application of the Gardner algorithm in timing synchronization loop and its limitation of the bandlimited signals, an enhanced Gardner timing error detection algorithm(E-Gardner),which has a simple structure and can effectively reduce the deviation of the timing error and system self-noise, is proposed by the comparison of the Gardner algorithm and its correction algorithm in terms of the pattern jitter and timing errors on the basis of the asynchronous sampling. The simulation results show that E-Gardner algorithm has a significant improvement in the performance of QPSK modulation signal’s clock capture and error detection in the case of a small rolloff factor under the Suzuki mobile satellite channel.