Pulse Arrival Time Estimation Based on Multi-Level Crossing Timing and Receiver Training

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概要

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• An accurate time-of-arrival (TOA) estimation method for isolated pulses positioning system is proposed in this paper. The method is based on a multi-level crossing timing (MCT) digitizer and least square (LS) criterion, namely LS-MCT method, in which TOA of the received signal is directly described as a parameterized combination of a set of MCT samples of the leading and trailing edges of the signal. The LS-MCT method performs a receiver training process, in which a GPS synchronized training pulse generator (TPG) is used to obtain training data and determine the parameters of the TOA combination. The LS method is then used to optimize the combination parameters with a minimization criterion. The proposed method is compared to the conventional TOA estimation methods such as leading edge level crossing discriminator (LCD), adaptive thresholding (ATH), and signal peak detection (PD) methods. Simulation results show that the proposed algorithm leads to lower sensitivity to signal-to-noise ratio (SNR) and attains better TOA estimation accuracy than available TOA methods.

著者

• Ma Hong

  Department Of Anesthesiology First Affiliated Hospital Of China Medical University

• LIANG Cheng-Guo

  Department of Electronics and Information Engineering, Huazhong University of Science and Technology

• CHENG Li

  Department of Electronics and Information Engineering, Huazhong University of Science and Technology

• YAO Zhen

  School of Physics, Huazhong University of Science and Technology

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