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Low Computational Complexity Two-Dimensional Direction of Arrival Estimation Method for L-shaped Antenna Array

A technology of computational complexity and direction estimation, applied in the radar field, can solve the problems of poor estimation performance and high computational complexity, and achieve the effect of overcoming poor estimation accuracy, low computational complexity, and high estimation accuracy

Inactive Publication Date: 2018-05-04
上海讯析电子科技有限公司
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of high computational complexity and poor estimation performance in the case of low signal-to-noise ratio and low snapshot of the two-dimensional DOA estimation method of the L-shaped antenna array in the prior art, and propose a method that can operate at low signal-to-noise ratio , A method for fast two-dimensional DOA estimation of target signals under the condition of low snapshot

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  • Low Computational Complexity Two-Dimensional Direction of Arrival Estimation Method for L-shaped Antenna Array
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  • Low Computational Complexity Two-Dimensional Direction of Arrival Estimation Method for L-shaped Antenna Array

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[0041] The present invention will be further described below in conjunction with the accompanying drawings.

[0042] refer to figure 1 , the specific implementation steps of the present invention are as follows:

[0043] Step 1, receive the signal.

[0044] The L-shaped antenna array composed of 2M antennas receives the target signal, and the target signal received by each antenna is sampled according to the Nyquist sampling theorem to obtain the L-shaped antenna array data matrix.

[0045] The data of the antenna placed along the horizontal direction in the L-shaped antenna array data matrix is ​​divided into x sub-array data matrix, and the data of the antenna placed along the vertical direction is divided into z sub-array data matrix, specifically can be expressed as:

[0046] X=AS+N

[0047] Z=BS+W

[0048]Among them, X represents the x subarray data matrix, Z represents the z subarray data matrix, A represents the x subarray flow pattern matrix, B represents the z sub...

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Abstract

The invention discloses an L-shaped antenna array low computation complexity two-dimensional DOA (Direction of Arrival) estimation method, mainly solving the problems of high computation complexity and poor estimation performance under a low signal to noise ratio and small snapshots of a present L-shaped antenna array low computation complexity two-dimensional DOA estimation method. The method comprises the steps of: (1) receiving signals; (2) constructing a cross-correlation matrix; (3) constructing an orientation augmentation matrix; (4) constructing a pitching augmentation matrix; (5) estimating an azimuth; (6) estimating a pitch angle; and (7) paring two-dimensional angles. The method utilizes an ESPRIT (estimation of signal parameters via rotation invariant technique) algorithm and a diagonal Toeplitz matrix to decompose characteristic values, realizes L-shaped antenna array DOA estimation with low computation complexity, a low signal to noise ratio and small snapshots, and can be used for radar and communication target location.

Description

technical field [0001] The invention belongs to the technical field of radar, and further relates to a low computational complexity two-dimensional direction-of-arrival estimation method of an L-shaped antenna array in the technical field of radar. The present invention can be used for the radar antenna to estimate the fast two-dimensional direction of arrival DOA (Direction of Arrival) of the target signal under the condition of low signal-to-noise ratio and low snapshot, and improve the radar antenna under the condition of low signal-to-noise ratio and low snapshot Fast direction finding performance on target signals. Background technique [0002] Two-dimensional DOA estimation is widely used in radar, communication and other fields. As an array that can be used for two-dimensional DOA estimation, the L-shaped antenna array has been proved to have good performance in two-dimensional DOA estimation. In recent decades, there have been many research results on the two-dimen...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/02G01S3/14
CPCG01S3/14G01S7/02
Inventor 董春曦董阳阳冯笑笑赵国庆饶鲜朱颖童刘松杨
Owner 上海讯析电子科技有限公司
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