Abstract

By difference treatment of the rate of change of the radial distance, the interchange relationship between the Doppler shift and the path difference is obtained, so that the Doppler shift can be used to obtain the path difference in an equivalent way. On this basis, by using the linear solution of the double-base linear array and constructing a virtual double-base array, a Doppler direction finding method using only the single-base array is obtained. Because the transformation method based on frequency shift and path difference avoids the direct comparison of phase, and the equivalence of transformation is mainly related to the accuracy of frequency shift measurement, the new method is likely to lay a theoretical foundation for the application of Doppler direction finding method in higher frequency bands.