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Mutual coupling condition-oriented bistatic MIMO (multiple-input multiple-output) radar angle estimation method

A bistatic, radar-based technology that uses complex mathematical operations, radio wave direction/bias determination systems, direction finders using radio waves, etc., to solve problems that are not suitable for radar systems

Active Publication Date: 2017-10-24
YANGTZE UNIVERSITY
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Problems solved by technology

In addition, the above two algorithms both use complex operations, which are not suitable for radar systems in actual engineering

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  • Mutual coupling condition-oriented bistatic MIMO (multiple-input multiple-output) radar angle estimation method
  • Mutual coupling condition-oriented bistatic MIMO (multiple-input multiple-output) radar angle estimation method
  • Mutual coupling condition-oriented bistatic MIMO (multiple-input multiple-output) radar angle estimation method

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[0022] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention and are not intended to limit the invention.

[0023] The present invention provides a bistatic MIMO radar angle estimation method under mutual coupling conditions. The bistatic MIMO radar angle estimation method under mutual coupling conditions includes the following steps:

[0024] S1. Perform matched filtering processing on the received array data, and construct a third-order tensor model;

[0025] S2. Construct a decoupling matrix according to the fact that the row elements of some sub-matrices of the mutual coupling matrix have a cyclic shift characteristic, and perform a decoupling operation on the third-order tensor model;

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Abstract

The present invention discloses a mutual coupling condition-oriented bistatic MIMO (multiple-input multiple-output) radar angle estimation method. According to the method, radar data which have been subjected to matched filtering are expressed as a third-order tensor model by means of the multi-dimensional structure of array signals; since a uniform linear array mutual coupling matrix has a strip-shaped Toeplitz feature, the common scale conversion feature of a part of an array element directional matrix is utilized to eliminate the influence of mutual coupling; on the basis of a forward-backward smoothing technique and a unitary transformation technique, the augmented output trilinear model of decoupling-post data is constructed; and joint DOD (direction-of-departure) and DOA (direction-of-arrival) estimation is related with the trilinear model; and a target DOD and DOA are estimated through the least squares method. Compared with a traditional algorithm, the bistatic MIMO (multiple-input multiple-output) radar angle estimation method under the mutual coupling condition can effectively deal with situations where mutual coupling exists between a transmitting array and a receiving array, can automatically match the estimated DOD and DOA, and can reduce computational complexity by using a feature that trilinear decomposition only involves real number operation.

Description

technical field [0001] The invention relates to a radar signal processing technology, in particular to a method for estimating the angle of a bistatic MIMO radar under mutual coupling conditions. Background technique [0002] With the continuous success and development of multiple-input multiple-output (MIMO) technology in the field of mobile communications, research on the application of MIMO technology in the field of radar is in the ascendant. Using matched filter processing and the idea of ​​virtual channel, MIMO radar can obtain new performance far superior to traditional phased array radar system. MIMO radar technology is one of the research hotspots in academia and engineering circles. This research direction not only has great theoretical and academic significance, but also has broad application prospects, especially with great military application value and civilian value. Powerful countries regard it as a key breakthrough technology for the development of future i...

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Application Information

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IPC IPC(8): G01S7/41G01S3/14G06F17/16
CPCG01S3/14G01S7/41G06F17/16
Inventor 文方青盛冠群李飞涛熊晓东
Owner YANGTZE UNIVERSITY
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