A method and system for mimo radar target direction finding considering the non-ideal orthogonality of transmit waveforms

A radar target and transmit waveform technology, applied in the field of MIMO radar target direction finding, can solve problems such as test performance degradation, and achieve the effects of improving independence, reducing the number of unknown parameters, and improving accuracy

Active Publication Date: 2022-03-01
苏州迈斯维通信技术有限公司
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Problems solved by technology

[0006] For this reason, the technical problem to be solved by the present invention is to overcome the technical defect of test performance degradation in the prior art when the waveform of the transmitted signal is not ideally orthogonal

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  • A method and system for mimo radar target direction finding considering the non-ideal orthogonality of transmit waveforms
  • A method and system for mimo radar target direction finding considering the non-ideal orthogonality of transmit waveforms
  • A method and system for mimo radar target direction finding considering the non-ideal orthogonality of transmit waveforms

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Embodiment Construction

[0059] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.

[0060] This embodiment uses MATLABR2015B software to run under the simulation environment of Win764 bit system, Intel i5-3470CPU3.20GHz, 4G memory.

[0061] refer to figure 1 As shown, the present invention discloses a MIMO radar target direction finding method considering non-ideal orthogonal transmission waveforms, comprising the following steps:

[0062] Step 1: The transmitting antenna array transmits T pulses, and the receiving antenna array acquires echo signals of T pulses from a target with an unknown far-field direction, and the echo signals are matched and filtered to form T snapshot data vectors.

[0063] Specifically, for a MIMO radar whose transmit antenna array cont...

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Abstract

The invention relates to a MIMO radar target direction finding method and system considering non-ideal orthogonal transmission waveforms, comprising the following steps: a transmitting antenna array transmits T pulses, echo signals are matched and filtered to form T snapshot data vectors; setting a For the uniform sampling angle grid set with full coverage of space angles, construct the extended array manifold matrix; use T snapshot data vectors to calculate the compressed transposition sample covariance matrix; construct sparse support vectors and initialize them; construct noise power weighted transmit signal mutual The correlation coefficient matrix is ​​initialized; the posterior mean vector and the posterior covariance matrix are obtained by calculation; the sparse support vector is updated; the noise power weighted transmission signal cross-correlation coefficient matrix is ​​updated based on the matrix joint diagonalization; according to the current updated sparse support vector The angle corresponding to the peak value of on the angle grid set is used to obtain the direction of arrival. Its direction-finding accuracy is high, and it can perform target direction-finding under the condition that the transmitted signal waveform is not ideally orthogonal.

Description

technical field [0001] The invention relates to the technical field of radar communication, in particular to a MIMO radar target direction finding method and system considering non-ideal orthogonal transmission waveforms. Background technique [0002] At present, multiple-input multiple-output (MIMO) radar is a new radar system that includes multiple antennas in a transmitting array and multiple antennas in a receiving array. Each antenna of the transmitting array of MIMO radar emits mutually orthogonal waveforms, and these electromagnetic waveforms are mixed in space, reflected by the detection target in the far field and received by each antenna of the receiving array of MIMO radar. Using mutually orthogonal transmit signal waveforms to perform matched filtering on the multi-channel signals received by the receive array, the extended receive data on the virtual extended array can be obtained, which essentially utilizes the space diversity corresponding to the orthogonal tr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/41G01S3/14
CPCG01S7/411G01S3/14
Inventor 李岳洲林萍徐重慧胡南
Owner 苏州迈斯维通信技术有限公司
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