Space time aperture optimization method of MIMO (Multiple Input Multiple Output) radar

An optimization method and multi-output technology, applied in the field of radar, to achieve the effect of easy implementation, simple thinking, and low computational load

Active Publication Date: 2011-10-12
XIAN CETC XIDIAN UNIV RADAR TECH COLLABORATIVE INNOVATION INST CO LTD
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AI Technical Summary

Problems solved by technology

However, in the field of MIMO radars, for a given dimension of the space-time steering vector, the ratio of the number of receiving and transmitting array elements to the number of pulses has not been studied so that the radar has a faster signal processing speed.

Method used

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  • Space time aperture optimization method of MIMO (Multiple Input Multiple Output) radar
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  • Space time aperture optimization method of MIMO (Multiple Input Multiple Output) radar

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Embodiment Construction

[0016] refer to figure 1 The space-time aperture optimization method of the MIMO radar of the present invention comprises the following steps:

[0017] Step 1, according to the MIMO radar transmit element spacing d T , receiving element spacing d R , to determine the ratio of the transmit inter-element spacing to the receive inter-element spacing:

[0018] Step 2, according to the radial velocity v of the MIMO radar and the pulse repetition period T, determine the ratio of the spatial synthetic aperture to the spacing of the receiving array elements within a pulse period:

[0019] Step 3. Set the dimension P of the MIMO radar space-time steering vector as a composite number that can be decomposed into three positive integers. The relationship between can get P=MNL;

[0020] Step 4, estimate the rank of the ground clutter covariance matrix.

[0021] In the actual radar signal processing process, the ground clutter covariance matrix is ​​used to simulate the ground clut...

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Abstract

The invention discloses a space time aperture optimization method of an MIMO (Multiple Input Multiple Output) radar, belonging to the field of a radar signal processing technique. The space time aperture optimization method disclosed by the invention has the optimization scheme that the optimization ratio of the receiving array element number to the emitting array element number to the receiving array element number to the pulse number is determined through the cost function optimization receiving array element number, emitting array element number and pulse number corresponding to a ground clutter covariance matrix rank by utilizing the relation among the rank of a ground clutter covariance matrix, the radar emitting array element number, the receiving array element number and the pulse number. In the space time aperture optimization method disclosed by the invention, the radar receiving array element number, the emitting array element number and the pulse number are distributed by utilizing the ratio relation which is determined by the invention, thus the MIMO radar can obtain the highest signal processing speed.

Description

technical field [0001] The invention belongs to the field of radar technology, and relates to a multi-input multi-output radar space-time aperture optimization method and the technical field of space-time aperture optimization. The number of receiving and receiving array elements and the number of pulses are optimized, and the speed of radar signal processing is improved through optimization. Background technique [0002] The suppression of ground clutter is an important link when radar detects moving targets on the ground. Generally, the space-time adaptive processing method is used. If only the airspace or time domain is used to process the target, it will be mixed in the clutter. However, if the airspace and The combination of time domain, that is, space-time adaptive processing, has a very obvious suppression effect on ground clutter. Multiple-input multiple-output MIMO radar can separate the transmit channels at the receiving end, so that the number of channels can be ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/28
Inventor 李军廖桂生龙利兵
Owner XIAN CETC XIDIAN UNIV RADAR TECH COLLABORATIVE INNOVATION INST CO LTD
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