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Target angle of arrival estimation method for mimo radar

A technology of angle of arrival and target, applied in the field of radar, can solve problems such as unacceptable calculation amount, achieve the effect of improving calculation speed, reducing calculation amount, and simple method

Active Publication Date: 2011-12-14
XIAN CETC XIDIAN UNIV RADAR TECH COLLABORATIVE INNOVATION INST CO LTD
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Problems solved by technology

[0008] However, the above methods are all aimed at MIMO radars with uniform linear arrays, and although the above methods reduce the amount of computation to a certain extent, the amount of computation is still unacceptable

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  • Target angle of arrival estimation method for mimo radar
  • Target angle of arrival estimation method for mimo radar
  • Target angle of arrival estimation method for mimo radar

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Embodiment Construction

[0027] refer to figure 1 , the specific implementation steps of the present invention are as follows:

[0028] Step 1: Perform matched filtering on the received signal to obtain virtual receiving array data.

[0029] The MIMO radar system of the present invention is composed of M transmitting antennas and N receiving antennas, wherein one of the transmitting and receiving arrays is a uniform linear array, the other is a random array and the distance between any two adjacent array elements is not greater than a uniform line For the aperture of the array, in the implementation of the present invention, two examples of M=5, N=4 and M=10, N=10 are given. The position coordinates of the mth transmitting antenna and the nth receiving antenna are respectively l T，m = u T，m · d(m=1, 2, L, M) and l R，n = u R，n d(n=1, 2, L, N), where u T，m and u R，n is an integer, d is the array element spacing set to half a wavelength, M antennas transmit multiple narrowband orthogonal signals a...

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Abstract

The invention discloses a method for estimating target arrival angle of a multiple input multiple output (MIMO) radar, which mainly solves the problem of large signal processing capacity in the target positioning process of MIMI radar. The method comprises the following steps of: 1) obtaining a virtual array of echo of each receiving antenna by a matched filter bank; 2) constructing a data conversion matrix and a dimension reduction array according to position of transmitting and receiving array; (3) reducing dimension of the virtual array data by the dimension reduction array to obtain an effective array after dimension reduction; 4) constructing two sub-arrays by rotational variance of effective array, and deriving covariance matrix of data; 5) decomposing eigenvalue of covariance matrix to obtain signal sub-spaces corresponding to two sub-arrays; 6) deriving rotational invariant relationship matrix by least square method to obtain arrival angle of target. The dimension reduction matrix form constructed by the method has versatility; the computation quantity is reduced by the dimension reduction of data and the ESPRIT (estimating signal parameter via rotational invariance techniques) algorithm; the computation speed of MIMO radar is increased; and the real-time signal processing of the MIMO radar is made easier.

Description

technical field [0001] The invention belongs to the field of radar technology, and relates to radar angle of arrival estimation, in particular to a method for estimating angle of arrival of MIMO radar targets based on a dimensionality reduction ESPRIT algorithm, which can be used for target positioning and tracking. Background technique [0002] In order to overcome the influence of traditional radar target scattering cross-sectional area RCS scintillation, etc., referring to MIMO communication system with multiple inputs and outputs, Fishler Eran et al. proposed the concept of MIMO radar in 2003. Due to its advantages in target detection and parameter estimation, it is obtained It has attracted extensive attention of scholars from all over the world. The currently researched MIMO radar systems can be roughly divided into two categories, one is distributed MIMO radar, represented by Fishler Eran of the New Jersey Research Institute in the United States and Blum Rick of Lehig...

Claims

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Application Information

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IPC IPC(8): G01S7/02
Inventor 杨明磊陈伯孝郑桂妹朱伟党晓方
Owner XIAN CETC XIDIAN UNIV RADAR TECH COLLABORATIVE INNOVATION INST CO LTD
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