脉 冲 星 特 征 频 率 信 号 的 到 达 时 间 处 理 方 法

Pulsar navigation is the most potential technology for autonomous management of the satellite in deep space exploration. However，the extremely low flux of pulsar signals limits the signal-to-noise ratio，and challenges high precision navigations. Only breakthrough is achieved in pulsar signal processing can the miniaturization of pulsar navigation system be solved and realized. In this paper，we analyze the problems in pulsar navigation，discuss the route of application for pulsar navigation，and propose a possible scheme for pulsar navigation systems. The Cramer-Rao Bound of the proposed scheme is analyzed and the scheme is demonstrated in simulations using the data of Crab Pulsar. Simulation result shows that the proposed pulsar signal processing scheme can achieve positioning accuracy of 3 km in the direction of Crab Pulsar vector，which is accordance with theoretical expectation.