脉冲星导航轮廓折叠失真与周期估计算法

通过互相关算法对快速折叠算法（FFA）生成的系列折叠轮廓与标准轮廓模板进行比对，评估因真实脉冲周期与理论脉冲周期不一致导致的轮廓折叠失真，实现了脉冲星导航光子序列周期估计。针对在轨信号处理背景，通过采样率与分组模式的选择，确定周期估计搜索范围。通过实验对本文提出的算法进行了分析，证明该算法能够利用较少的观测信息在较低信噪比环境下实现光子序列周期的准确估计。

Profile Folding Distortion and Period Estimation for Pulsar Navigation

A period estimation method for pulsar navigation is proposed by using the cross-correlation algorithm to compare the rebuilt profile set generated by fast folding algorithm (FFA) with the standard profile, and the profile distortion due to the real period mismatches the theoretical one is analyzed. Aiming at the satellite flight mission, the parameter of the sampling and the mode of grouping is customized to limit the search range of period estimation. The experiment is designed to analyze the method proposed in the paper, and the result shows that this method can realize accurate period estimation by use of limited observation under the condition of low SNR.