Four-arm helical antenna data fitting angle measurement method

Abstract

The invention discloses a four-arm helical antenna data fitting angle measurement method, and relates to the technical field of radars. The method comprises the following steps: after four original antenna beams of a target to be measured are obtained, acquiring a first pre-estimated value of a first angle by using a pre-fitted first function relationship, wherein the first angle is an included angle between a target coming direction and a horizontal plane of an antenna coordinate system; acquiring a pitch angle pre-estimated value and an azimuth angle pre-estimated value through a pre-fitted second function relation, and acquiring a second pre-estimated value of the first angle and a second angle pre-estimated value, wherein the second angle pre-estimated value is the included angle between the projection of the target coming direction of the target to be measured on the horizontal plane and a preset pointing direction; and correcting according to the first angle first estimated value, the first angle second estimated value and the second angle estimated value to obtain a pitch angle and an azimuth angle of the target to be measured. According to the method, an angle measurement result can be conveniently obtained by adopting a data fitting method, the memory overhead is saved, and the angle measurement efficiency is high.

Description

technical field [0001] The invention relates to the technical field of radar, in particular to a data fitting angle measurement method of a four-arm helical antenna. Background technique [0002] Angle measurement is the most critical application of radar signal processing. Angle measurement provides basic information for further processing and utilization of radar signals at the back end. At present, the two most commonly used angle measurement systems are monopulse angle measurement and phase interferometer angle measurement. The phase interferometer angle measurement system uses the signal phase difference of the continuous wave carrier of the paired antenna receiving template to obtain the error signal related to the magnitude and direction of the target deviation from the signal axis. Although the phase interferometer angle measurement system has high tracking accuracy, it is difficult to debug Large, and there is a defuzzification problem. Therefore, the single-pulse ...

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Problems solved by technology

However, the look-up table method has two major disadvantages: 1. The table data takes up a large amount of memory units; 2. The look-up table method will waste the search time, and the search algorithm is not well executed, and the search time will be correspondingly slowed down, which also brings a negative impact on the real-time processing system. come to a certain challenge

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