科创中国

High-precision pulse phase estimation method based on noise characteristics

• 摘要：

  Mathematic model of the pulse phase estimation problem was addressed, and the effective weighted nonlinear least-square (WNLS) estimator was presented. The weighting matrix of the WNLS estimator was derived by adopting statistical properties of epoch folding noises. The performance of the proposed technique was compared with the Cramér-Rao lower bound (CRLB). The results of numerical simulations and real data experiments indicate that the proposed estimator is asymptotically unbiased and efficient, its asymptotical performance outperforms the nonlinear least square (NLS) estimator and is comparable with the maximum-likelihood (ML) estimator as the observation time increases. As for the experiment of real Crab pulsar data, the position error of the WNLS method is about 400 m less than that of the NLS method when the observation time is 80 s.

• 作者：

  Haifeng Sun;为民 包;Haiyan Fang;小平 李

• 刊名：

  Huazhong Keji Daxue Xuebao (Ziran Kexue Ban)/Journal of Huazhong University of Science and Technology (Natural Science Edition)

• 在线出版时间：

  2015-11-23