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A Design Method of Inter-element Delay in Space-Time Coded Array Radar

A space-time coding, array radar technology, applied in the field of array radar signal processing, can solve problems such as the influence of target detection ability

Active Publication Date: 2022-04-19
XIDIAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Utilizing the space-time full-space coverage characteristics and distance-angle coupling capability of the space-time coding array can make the beam continuously scan in space to detect the target, but when the detection distance is long, multiple peaks may appear in the distance dimension, making the detection of the target difficult. Detection ability is affected

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Embodiment Construction

[0033] Embodiments of the present invention will be described in detail below in conjunction with embodiments, but those skilled in the art will appreciate that the following embodiments are used only to illustrate the present invention and should not be construed as limiting the scope of the present invention.

[0034] (1) Reference Figure 2 , the present invention provides a design method for the delay between array elements in the space-time coded array radar, comprising the following steps:

[0035]Step 1, set the space-time coded array radar is composed of M emission array elements, and the array elements are distributed equidistantly at half-wavelength intervals; M arrays emit the same waveform, and there is a relative delay between each emission array; radar emits air-time coded baseband waveforms;

[0036] as Figure 1 As shown, the embodiment of use of the present invention is a one-dimensional isometric linear array emitting an empty-time encoded signal: the transmittin...

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Abstract

The invention belongs to the technical field of array radar signal processing, and specifically discloses a design method for the time delay between array elements in a space-time coded array radar. By establishing a space-time coded array transmission signal model, the transmission pattern at a far-field target is obtained. ;By extracting the range of the main lobe of the emission pattern, the time delay is converted into a three-dimensional variable of distance-angle-time, and the time delay is set according to a given distance and angle position, which becomes a function of time; it breaks the fixed time delay The scanning periodicity brought by the beam enables continuous irradiation at a given position.

Description

Technical field [0001] The present invention relates to the field of array radar signal processing technology, in particular to a design method for the delay between array elements in a space-time coded array radar, which can be used for target positioning. Background [0002] The beam of a phased array radar has high gain performance, but it can only be pointed at a fixed angle at any one time, and it needs to be scanned continuously to achieve spatial coverage. MIMO radar achieves full-space coverage performance by emitting orthogonal waveforms, but its application is also limited due to the difficulty of achieving full orthogonal waveforms. [0003] Space-time encoded arrays are a newer array architecture whose most basic model is to introduce a fixed time delay between adjacent arrays on the basis of a uniform isometric linear array. This time delay is much smaller than the pulse duration, and each array can achieve orthogonality of the signals transmitted between the array ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/282G01S7/02
CPCG01S7/282G01S7/02
Inventor 王华柯王岩星全英汇朱圣棋廖桂生
Owner XIDIAN UNIV