Method for estimating target direction by multiple input multiple output (MIMO) radar

A radar target and radar echo technology, applied in the radar field, can solve the problems of slow calculation speed, low estimation accuracy, and too large number of virtual array elements.
CN101799535AInactive Publication Date: 2010-08-11XIDIAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XIDIAN UNIV
Publication Date
2010-08-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for estimating target direction by a multiple input multiple output (MIMO) radar, belonging to the technical field of radars and mainly solving the problem of limiting computation complexity, computation speed and estimation precision in the prior art. The method comprises the steps of: firstly, carrying out the distance compression on a radar echo signal; secondly, carrying out reduction of dimensionality on the compressed echo signal; thirdly, constructing a cost function to the echo signal subjected to the reduction of dimensionality according to the least squares criterion and solving by using a three-iterative approach; and fourthly, computing a direction-of-arrival angle of a target through computing a receiving and sending guide vector matrix by using an array popularity of a receiving array and a sending array. The invention has the advantages of low computation complexity, high computation speed and high estimation precision, and can be used for estimating the direction-of-arrival angle of the target of the MIMO radar.
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Description

Technical field

[0001] The invention belongs to the field of radar technology, and specifically is a method for estimating the direction of arrival of a target wave of a multiple-input multiple-output MIMO radar system. Background technique

[0002] MIMO radar is a new system radar developed in recent years. The radar adopts space diversity and signal diversity technology, which can well overcome the performance loss caused by the angular scintillation of the target radar cross-sectional area RCS, and thus has advantages in target detection. Its unique advantages. MIMO radar uses multiple transmitting antennas to transmit linearly independent signals instead of transmitting coherent beams like traditional phased array radars. Generally, MIMO radars can be divided into two categories: one is non-coherent MIMO radar. The wide distance between the transmitting and receiving antennas can obtain the spatial diversity information of the target RCS, thereby improving the target detecti...

Claims

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