Two-dimensional direction of arrival estimation method for nested array based L-shaped antenna array
A technology of direction estimation and antenna array, which is applied in radio wave direction/deviation determination system, radio wave measurement system, orientator for direction determination, etc. It can solve problems such as subspace leakage, poor estimation accuracy, and influence on direction of arrival estimation. , to achieve the effect of large aperture, high-precision two-dimensional direction of arrival estimation, and strong robustness
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[0039] In order to better illustrate the purpose and advantages of the present invention, the content of the invention will be further described below in conjunction with the accompanying drawings and examples.
[0040] In order to verify the feasibility of the method, the array is placed in the XOY plane, and the angle between the projection of the incoming wave direction on the plane XOY and the positive semi-axis of the X axis is defined as the azimuth angle θ, and the counterclockwise is positive. Define the angle between the incoming wave direction and the normal of the X-Y plane as the pitch angle φ, there are 3 incident signals, and the incident angles (θ, φ) are (15°, 20°), (45°, 50°), (75°,80°). For the convenience of calculation, the included angle (α, β) between the incoming wave direction and the X-axis and Y-axis is used instead of (θ, φ) in the following formula, where cosα=cosθsinφ, cosβ=sinθsinφ.
[0041] Such as figure 1 As shown, a two-dimensional direction...
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