| Citation: | XING Huaixi, WU Hua, CHEN You, et al. Single-baseline interferometer positioning method based on azimuth multiple hypothesis[J]. Journal of Beijing University of Aeronautics and Astronautics, 2021, 47(5): 1049-1057. doi: 10.13700/j.bh.1001-5965.2020.0074(in Chinese)
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In order to solve the problem of ambiguity of phase difference information measured by one-dimensional single-baseline interferometer in an airborne single-station passive positioning system, the positioning method that measures only the phase difference change rate is improved, and the fuzzy phase difference is used as an effective positioning parameter. And a single-baseline interferometer phase measurement and positioning method based on azimuth multiple hypotheses is proposed. The possible distance and azimuth information of the radiation source target is initialized using the fuzzy phase difference and the phase difference change rate, and the target location of the radiation source is solved by the Gauss-Extended Kalman Filter (GS-EKF) algorithm. This method overcomes the shortcomings of using only the phase difference change rate to locate the impact of the maneuver of the observation platform, effectively shortens the positioning time, and does not need to consider the solution of phase ambiguity. Its positioning performance is superior to the positioning method that only measures the phase difference or the phase difference change rate. In practical engineering applications, this method can reduce equipment complexity and cost.
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