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Multiple-target and send-receive angle estimation method of double-base multiple-input and multiple-output radar

An angle estimation, multi-input technology, applied in radio wave measurement systems, instruments, etc., can solve problems such as unfavorable real-time processing and hardware implementation, unsatisfactory estimation accuracy, large amount of calculation, etc. The effect of good angle estimation performance and improved estimation accuracy

Inactive Publication Date: 2013-03-20
HARBIN ENG UNIV
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Problems solved by technology

However, the estimation accuracy of the above method is still not ideal, and the matrix operation and eigenvalue decomposition are all carried out in the real number field, and the amount of calculation is large, which is not conducive to real-time processing and hardware implementation.

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  • Multiple-target and send-receive angle estimation method of double-base multiple-input and multiple-output radar

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Embodiment Construction

[0040] Implementation steps of the present invention mainly include:

[0041] 1) Collect the echo signal of each receiving antenna through the A / D sampling module, and pass the collected signal of each receiving antenna through a matched filter bank to separate the corresponding signals of each transmitting channel, and obtain an array element number MN The received data X(t) of the virtual array, where M and N represent the number of transmitting and receiving array elements respectively;

[0042] 2) According to the received data X(t), construct the received data matrix Y(t) that satisfies the characteristics of the Centro-hermitian matrix:

[0043] Y(t)=[X(t)Γ MN x * (t)Γ L ](1)

[0044] where Γ MN Represents an anti-diagonal permutation matrix of MN×MN, Γ L Represents an L×L anti-diagonal permutation matrix, all elements on the anti-diagonal line are 1, and the rest of the elements are all 0. (·) * Represents the conjugate of a matrix.

[0045] 3) Perform Unitary ...

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Abstract

The invention provides a multiple-target and send-receive angle estimation method of a double-base multiple-input and multiple-output radar. A receiving end collects echo signals of every receiving antenna through an analog to digital (A / D) sampling module. The collected signals passes through a matched filter group, signals corresponding to every launching channel are separated, and receiving data of a virtual array is obtained, wherein the number of array elements is MN. The receiving data is expanded and is transformed into a real number field by utilizing Unitary transformation. A covariance matrix is calculated and is disassembled by utilizing characteristic value to obtain an actual value signal subspace and an actual value signal subspace. In the end, a target DOD is obtained by utilizing Unitary ESPRIT, and a target DOA is obtained by utilizing Unitary Root-MUSIC. According to the multiple-target and send-receive angle estimation method of the double-base multiple-input and multiple-output radar, the send-receive angle is automatically paired, extra pairing operation is not needed, and cross bearing of the target is achieved by utilizing the send-receive angle of the target. The multiple-target and send-receive angle estimation method of the double-base multiple-input and multiple-output radar has the advantages of being high in estimated accuracy and low in computing complexity.

Description

technical field [0001] The present invention relates to a calibration positioning and tracking method, specifically a method for estimating the sending and receiving angle of a target of a multi-input multi-output radar. Background technique [0002] Multiple-input multiple-output (MIMO) radar is a new system radar with a performance based on the multiple-input multiple-output technology in the communication field. Compared with traditional radar, MIMO radar transmits mutually orthogonal waveforms at the transmitting end, and can form a large virtual array aperture through matched filtering at the receiving end, which improves the spatial resolution of the detection target and increases the freedom of the radar . At present, MIMO radar is mainly divided into the following two types. One is centralized MIMO radar. The array elements of the transmitting end and receiving end of the radar are distributed in a centralized manner. The orthogonal signals transmitted by different ...

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Application Information

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IPC IPC(8): G01S7/41
Inventor 王伟王咸鹏李沫璇李欣宋鸿儒李强赵俊杰马跃华王志华朱玮
Owner HARBIN ENG UNIV
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