Improved phase comparison angle measurement method

Abstract

The invention discloses an improved phase comparison angle measurement method, which comprises steps: S1, a phase difference between antenna elements is solved; S2, a phase error signal P is solved toobtain a modulus value of the phase error signal P; S3, according to the phase difference between antenna elements and the modulus value of the phase error signal P, the absolute value of the calculated angle alpha is obtained; and S4, the imaginary part of P is judged, in the case of a negative number, the alpha is positive and alpha=|alpha|, and in the case of a positive number, the alpha=-|alpha|. By adding and subtracting time domain signals first, the phase information in a spectrum is more accurate, and the amount of calculation can be reduced while the system performance requirements are met.

Description

technical field

[0001] The invention belongs to the field of antenna angle measurement, in particular to an improved method for phase comparison angle measurement. Background technique

[0002] Angle measurement is to measure the pitch angle and azimuth angle of the target, which is an important part of target orientation and precise guidance. There are many existing radar angle measurement algorithms, such as amplitude comparison method, phase comparison method, array scanning angle measurement, single pulse angle measurement, super-resolution angle measurement and so on. The angle measurement range of the phase comparison method is mainly related to the antenna spacing and the radar signal frequency. The existing angle measurement range is small. After exceeding a certain range, the measured angle changes suddenly, and certain compensation is required; and the phase information in the frequency spectrum is inaccurate. , the amount of calculation is large. Contents of th...

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