A Multibaseline Phase Interferometer Direction Finding Method Without Deblurring

Abstract

The invention discloses a multi-baseline phase interferometer direction finding method without deblurring. An initialization module reads and obtains parameters such as front width, baseline number, baseline length, and shortest wavelength, and then calculates a normalized angle search step according to the longest baseline. The corresponding array is constructed according to the search step size; the receiving data reading module reads the quadrature signal and the wavelength of the incoming wave sent by the corresponding receiving channel of each antenna element; the phase interference calculation module calculates the adjacent two receiving channels according to the initial settings The normalized angle acquisition module first searches all search angles for the normalized angle with the largest corresponding real part pattern, and then iteratively solves the more accurate normalized angle that maximizes the real part pattern ; The angle conversion module obtains the incoming wave direction according to the normalized angle output by the normalized angle acquisition module. The present invention can avoid the problems of difficulty in understanding, large amount of calculation, sensitivity to phase detection error, etc. existing in various defuzzification algorithms.

Description

technical field [0001] The invention relates to a direction of arrival (DOA) estimation and radiation source direction measurement technology, in particular to a multi-baseline phase interferometer direction finding method without de-ambiguity. Background technique [0002] The phase interferometer is used for high-precision measurement of the direction of arrival or the direction of the radiation source, and has been widely used in the fields of modern electronic warfare and passive positioning. As modern warfare has higher and higher requirements on the measurement accuracy of the radiation source direction, the phase interferometer direction finding technology is still under constant research, improvement and development, driven by the actual military needs. [0003] The basic principle of phase interferometer is as follows figure 1 shown, respectively identified as and The two antenna elements form a simple single-baseline phase interferometer, the distance between ...

AI Technical Summary

Problems solved by technology

[0011] Purpose of the invention: The purpose of the present invention is to solve the deficiencies in the prior art and provide a multi-baseline phase interferometer direction finding method that does not require defuzzification. Fuzzy, solves the problems of difficult engineering implementation, large amount of calculation, difficult to understand, step-by-step amplification and transfer of phase detection errors caused by the traditional phase interferometer direction finding method, which must first complete the phase ambiguity solution. It has a clear concept, easy to understand, and calculation Outstanding advantages such as small quantity, simple implementation, strong adaptability to array baseline configuration, and strong anti-noise ability

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