Array antenna beam control method based on frequency diversity, system and controller

A beam steering and array antenna technology, applied in the field of communications, can solve the problems of increasing the difficulty of engineering implementation and high requirements for radio frequency hardware

Active Publication Date: 2021-03-16
PURPLE MOUNTAIN LAB
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, this random frequency offset method needs to constantly change the carrier frequency of each transmitting unit,

Method used

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  • Array antenna beam control method based on frequency diversity, system and controller
  • Array antenna beam control method based on frequency diversity, system and controller
  • Array antenna beam control method based on frequency diversity, system and controller

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Embodiment Construction

[0046] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the described embodiments are only illustrative but not intended to limit the present invention.

[0047] figure 1 It is a flow chart of the beam control method of the array antenna based on the frequency diversity FDA according to the example of the present application. As shown in the figure, in step S10, the signal from the transmitting end is received by the receiving array including the first sub-array and the second sub-array, the first sub-array includes M evenly arranged array elements, and the second sub-array includes N evenly arranged Arranged array elements, M and N are mutually prime integers, and M≥0, N≥0; the receiving array is a sparse matrix in which the array elements are uniformly arranged in each sub-array.

[0048] As an example, in the first sub-array, the distance between adjacent array elements is N×d, and in the s...

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Abstract

The invention provides an improved array antenna beam control method based on frequency diversity, and the method comprises the steps: receiving a signal from a transmitting end through a receiving array comprising a first sub-array and a second sub-array, the first sub-array comprises M uniformly arranged array elements, the second sub-array comprises N uniformly arranged array elements, M and Nare co-prime integers, and M is greater than or equal to 0 and N is greater than or equal to 0; inputting a signal received in each array element in the receiving array into a constructed model, outputting a covariance matrix after model processing, and the model is related to a received signal vector, a steering vector and target scattering power; constructing a virtual array at a receiving end,wherein virtual array elements in the virtual array are second-order statistics calculated according to the covariance matrix; and randomly selecting a frequency for each of the virtual array elementsfrom the set of frequencies of the virtual array to form a beam pattern. According to the method of the invention, distance-angle decoupling and beam focusing can be realized.

Description

technical field [0001] The present invention relates to the technical field of communication, and more specifically, relates to a beam control method of an array antenna based on frequency diversity. Background technique [0002] Since Frequency Diverse Array (FDA) was proposed by Antonil et al. in 2006, it has been a research hotspot in the field of radar. Different from traditional phased array antennas, frequency diversity array (FDA) introduces a carrier frequency difference on each array element, thereby providing a beam pattern related to the distance angle, which makes FDA have anti-distance dependence and other phased arrays. There are no advantages. However, the linear FDA with uniformly increasing frequency suffers from the problem of angle-distance coupling in the case of far-field beam patterns, which makes the array energy S-shaped in space, leading to localization ambiguity. [0003] So far, many non-linearly increasing frequency offset schemes have been prop...

Claims

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Application Information

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IPC IPC(8): H04B7/06H04B7/0408G01S7/42
CPCH04B7/0617H04B7/0408G01S7/42
Inventor 刘升恒黄永明毛子焕倪天恒尤肖虎
Owner PURPLE MOUNTAIN LAB
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