中文摘要：

分析了DVB—RCS卫星网络中子站与主站进行交互的通信结构特点，得到了获取回传链路突发信号参数的方法。重点对相应突发信号的符号常模定时估计算法进行了推导和简化，结合系统结构特点设计了一种基于数据辅助的的近似常模算法。该算法复杂度低、达到要求定时精度使用符号数少。与其他前向型定时估计算法比较，理论分析和Monte Carlo仿真结果显示该算法在实际系统的突发参数下，均方根误差均更接近MCRB。

英文摘要：

The communication structural characteristics of interaction between the DVB-RCS satellite network substation and the main station is analyzed, and the way of gaining the parameters of the burst signal of the return link is also introduced. The deducing and simplifying of symbol constant modulus timing estimation algorithm of the corresponding burst signal are mainly introduced, and an approximate constant modulus algorithm based on the data supporting by combining with structural features of the system is designed. And this algorithm is of low complexity and can achieve the required timing accuracy with less number of symbols. Through the comparison of it with other types of forward timing estimation algorithm, the theoretical analysis and Monte Carlo simulation results show that in the actual system parameters, the root mean square errors of this algorithm are closer to MCRB.