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Pulse Phase Estimation of X-ray Pulsar with the Aid of Vehicle Orbital Dynamics

  • Yidi Wang (a1) and Wei Zheng (a1)

Abstract

A pulse phase estimation of an X-ray pulsar with the aid of vehicle orbital dynamics is proposed. The original continue-time X-ray pulsar signal model is modified to be a term of vehicle position and velocity varying with time, and a modified definition of pulse time of arrival is given. The modified signal model is further linearized around the predicted position and velocity of the vehicle to the second order. The initial phase and the coefficients of the extended signal model can be estimated by maximum likelihood estimator. Some simulations are performed to verify the method and show the method has robustness to the initial error within initial state of the vehicle and is capable of handling the phase-estimation problem for pulsars with low fluxes.

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References

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Pulse Phase Estimation of X-ray Pulsar with the Aid of Vehicle Orbital Dynamics

  • Yidi Wang (a1) and Wei Zheng (a1)

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