A frequency diversity MIMO radar distance-angle decoupling beam forming method

A frequency diversity and distance technology, applied in the field of signal processing, can solve problems such as poor suppression ability and target detection performance degradation

Active Publication Date: 2016-06-22
昆山煜壶信息技术有限公司
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Problems solved by technology

However, the distance-angle two-dimensional dependence of the frequency diversity array pattern is determined by the frequency increment, and it cannot adaptively form zero points and depressions, and its ability to suppress complex environments and interference

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  • A frequency diversity MIMO radar distance-angle decoupling beam forming method
  • A frequency diversity MIMO radar distance-angle decoupling beam forming method
  • A frequency diversity MIMO radar distance-angle decoupling beam forming method

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Embodiment Construction

[0046] The embodiments and effects of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0047] refer to figure 1 , the application scenario of the present invention is based on the frequency diversity MIMO radar system: assuming that the target is located in the far field, the elevation angle is θ, and the transmitting end in the frequency diversity MIMO radar system is composed of M transmitting array elements, and the array element spacing is d L ; The receiving end is composed of N array elements, and the array element spacing is d R ;The signal frequency of the mth array element is:

[0048] f m = f 0 +(m-1)Δf,m=1,2,...,M

[0049] Among them, f 0 is the reference working frequency, and Δf is the frequency interval between array elements.

[0050] refer to figure 2 , the implementation steps of the present invention are as follows:

[0051] Step 1, introduce the frequency interval Δf between the transmi...

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Abstract

The invention discloses a frequency diversity MIMO radar distance-angle decoupling beam forming method, and mainly solves problems of impossibility of forming distance-angle decoupling self-adaptive responses of an existing frequency diversity array. The realization steps are that 1, the frequency of emission signals of the frequency diversity array is designed; 2, the emission signals and receiving end echo signals of the frequency diversity array are obtained; 3, vector outputting is carried out on the receiving end echo signals to obtain snapshot vectors of the echo signals; and 4, self-adaptive beam forming is carried out on the snapshot vectors to obtain a distance-angle two-dimensional beam forming directional diagram. According to the invention, the degree of freedom of emission of the frequency diversity array is fully utilized to form a controllable degree of freedom in a dimension of distances and angles on the basis of a frequency diversity MIMO radar system, and two-dimensional beam forming of distances and angles is realized through self-adaptive beam forming technology. The frequency diversity MIMO radar distance-angle decoupling beam forming method can be used for combined detection of distances and angles, and suppress interference signals related to the distances.

Description

technical field [0001] The invention belongs to the technical field of signal processing, and in particular relates to a frequency diversity MIMO radar range-angle decoupling beamforming method, which can be used to detect targets and suppress distance-related interference. Background technique [0002] Compared with the traditional phased array radar, multiple-input multiple-output MIMO radar can effectively use the transmit degree of freedom, realize transmit-receive joint processing, improve adaptive ability, and improve radar parameter estimation performance. However, the traditional multiple-input multiple-output MIMO radar only has the degree of freedom in the angle dimension, without the degree of freedom in the distance dimension, and it is difficult to achieve distance-related interference suppression. [0003] The concept of frequency diversity array was proposed by Paul Antonik et al. at the International Radar Conference in 2006. It has flexible beam steering cap...

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Application Information

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IPC IPC(8): G01S7/42G01S7/28
CPCG01S7/2813G01S7/42
Inventor 廖桂生许京伟兰岚王成浩冯阳
Owner 昆山煜壶信息技术有限公司
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