Distributed meter wave array radar angle measuring method based on information fusion

Abstract

The invention discloses a distributed meter wave array radar angle measuring method based on information fusion. The problem that according to an existing technology, angle measuring accuracy in a distributed meter wave array radar is low is mainly solved. The method comprises the steps that (1) according to distributed array antenna structure parameters and radar working parameters, the performance parameters of a distributed array antenna are obtained; (2) a target is detected and tracked, and the number of a distance unit where the target is placed is obtained; (3) data of the distance unit where the target is placed are subjected to beam forming, and a beam forming vector is obtained; (4) a peak value of the beam forming vector is extracted to form a maximum value vector, and an information matrix is formed through the maximum value vector; and (5) an information matrix X is subjected to information fusion according to a fusion criterion, and the angle value of the target is obtained. According to the method, correlation of target information in adjacent multi-frame radar echo data is used, through infusion of the target information in the multi-frame data, influence on target angle measuring of a high-minor-lobe level is lowered, angle measuring accuracy is improved, and the method can be used for target angle measuring.

Description

technical field [0001] The invention belongs to the technical field of radar detection, and specifically relates to a method for measuring the angle of a meter-wave array radar, which can be used for tracking and measuring the angle of a target when radar antennas are placed in a distributed manner. Background technique [0002] Meter wave radar has unique advantages in over-the-horizon detection and anti-electronic interference, and has been widely valued in recent years. However, due to the long wavelength of the transmitted signal of the meter wave system radar, according to the antenna theory, the antenna beam width is proportional to the physical aperture of the antenna. Under the same antenna aperture, the beam width of the meter wave system radar is relative to the beam width of the microwave system radar. greatly increased, resulting in the inherent defect of poor angular resolution of meter-wave system radars. This problem can be overcome by increasing the physical...

AI Technical Summary

Problems solved by technology

When the signal-to-noise ratio of the received signal of the array antenna is high and the sidelobe level of the array antenna is low, the beam scanning method has good angle measurement performance, but in the meter-wave distributed array radar, due to the high The sidelobe level makes the angle measurement accuracy of the beam scanning method poor in distributed meter wave radar

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