A Method of Restraining Two-Dimensional Angle Measuring Errors Using Inequality Constraints of Solid Angle
A solid angle and inequality technology, applied in the field of electronic information, can solve problems such as improving the accuracy of two-dimensional angle measurement, and achieve the effect of suppressing the error of two-dimensional angle measurement and reducing the computational complexity.
Active Publication Date: 2019-04-26
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology
[0003] The purpose of the present invention is to solve the problem that the array angle measurement technology in the background technology is difficult to improve the accuracy of two-dimensional angle measurement through the method of system error correction when there is large measurement noise. The inequality constraint of the solid angle is used to discriminate and eliminate the angle measurement results when the measurement noise is large, so as to suppress the two-dimensional angle measurement error
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[0020] Taking two linear arrays located on the positive semi-axis of the x-axis and the positive semi-axis of the y-axis of the plane coordinates and a target that needs to be measured in two dimensions in three-dimensional space as an example, in this embodiment, the actual orientation of the target The angle (θ) is 145.7 degrees, and the pitch angle is 16.3 degrees, two-dimensional angle measurement (θ x and θ y ) noises obey a Gaussian distribution with zero mean and standard deviation of 2 degrees.
[0021] In this embodiment, the purpose of implementing the present invention is to use the inequality constraint of the solid angle formed by the two linear arrays and the target incoming wave direction to discriminate and eliminate the angle measurement results when the measurement noise is large, so that Suppress the two-dimensional angle measurement error and improve the estimation accuracy of target azimuth and elevation angle.
[0022] The flow process of this embodim...
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The invention belongs to the technical field of electronic information, and relates to a method for inhibiting two-dimensional angle measurement errors by use of an inequality constraint of a solid angle. According to the invention, by use of an inequality constraint of a solid angle, consisting of two linear arrays and a target incoming wave direction, a measurement result during quite high measurement noise is discriminated and removed, so an objective of inhibiting two-dimensional angle measurement errors is achieved; the calculation complexity is low; and effects for inhibiting two-dimensional angle measurement errors are quite remarkable during two-dimensional angle measurement on a target with quite loud measurement noise and quite small elevation angle.
Description
technical field [0001] The invention belongs to the technical field of electronic information, and relates to a method for suppressing two-dimensional angle measurement errors by utilizing inequality constraints of solid angles. Background technique [0002] Estimating the direction of arrival of the target is an important technology in the field of information acquisition and detection. Among them, the array angle measurement technology has attracted the attention of many scholars and engineers due to its high angle measurement accuracy, and has been widely used. In array angle measurement technology, sources of angle measurement errors include system errors and measurement noises, and system errors include array element position errors, amplitude and phase errors, and antenna mutual coupling. At present, there have been a lot of researches on the systematic error analysis and correction of array angle measurement. However, when the measurement noise is large, the system er...
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IPC IPC(8): G01S3/04
CPCG01S3/04
Inventor 万珊杉邹继锋万群
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA