关键词: 无源定位, 相位差变化率, GDOP

Abstract:

The traditional method of passive location takes long positioning time and has low positioning accuracy.A phase change rate based on three-dimensional positioning method is proposed to achieve a radiation source positioning,high positioning accuracy,positioning speed by obtaining phase change rate using the three-element antenna array.The relationship between the positioning error and measurement error is analyzed,and the positioning error expressions are given.A simulation analysis is made of the effect of the phase measurement error and the rate of change of phase measurement errors on the accuracy of the simulation results.The results show that the rate of change of phase errors has the greatest impact on positioning accuracy,thus the primary restricting factor in accuracy improvement.

Key words: passive location;phase variations;GDOP