Grating lobe ambiguity resolution method applied to sparse array broadband phased array

A broadband phased array and sparse technology, applied in the field of grating lobe defuzzification, achieves the effect of simple method, low interception and simple system

Active Publication Date: 2020-04-10
NO 20 RES INST OF CHINA ELECTRONICS TECH GRP
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  • Grating lobe ambiguity resolution method applied to sparse array broadband phased array

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0016] The steps of a grating lobe defuzzification method applied to a wideband phased array with sparse arrays are as follows:

[0017] Step 1: Sparsely arrange the wideband phased array within the working bandwidth range, divide the frequency of the working bandwidth into N parts, and the frequencies are F1 to FN in turn, where the relative bandwidth = (the highest frequency of the working bandwidth - the lowest frequency of the working bandwidth) / (The highest frequency of working bandwidth + the lowest frequency of working bandwidth), and the relative bandwidth > 5%, the interval of N frequency is B, and B is greater than one-tenth of the working bandwidth, that is, N = (the highest frequency of working bandwidth - the lowest frequency of working bandwidth) / B, the sparse array broadband phased array transmits the transmit signal with the frequency...

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Abstract

The invention provides a grating lobe ambiguity resolution method applied to a sparse array broadband phased array. The method comprises the following steps: a sparse array broadband phased array equally divides the frequency of the working bandwidth within the range of the working bandwidth, and the sparse array broadband phased array transmits a transmitting signal with the frequency F1 and receives an echo; the transmitting frequency of the sparse array broadband phased array is switched to be F2-FN in sequence, echoes are received in sequence, and if no target exists at the moment, it is determined that the target exists at the position of the original grating lobe; and if the target exists, the target exists at the original signal receiving position. The calculation process of gratinglobe discrimination is the same as the calculation process of a common radar searching and tracking method, no extra calculation amount is increased, and therefore the method has the characteristicsof simplicity, practicality, small calculation amount and simple system; the broadband radar system performs frequency hopping, and has the characteristics of low interception and strong anti-interference capability; and frequency hopping of the broadband radar system can obtain the advantages of multipath resistance and good low-angle performance.

Description

technical field [0001] The invention relates to the field of radar, in particular to a grating lobe defuzzification method. Background technique [0002] The phased array system radar has the ability to change the beam position and shape, which can effectively realize the rapid and flexible detection of the airspace and the tracking of multiple targets; the phased array system is divided into three stages: passive, active and digital phased array: no The source phased array radar is characterized by the use of an electric vacuum tube central transmitter, which has a fast search rate and adaptive agile scanning capability; the active phased array radar is characterized by the use of solid-state components, which have high sensitivity, high reliability and high detection Performance; The digital phased array radar is characterized by the use of digital beamforming technology, which has a fast wide-area scanning rate, high sensitivity and better clutter cancellation, operationa...

Claims

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Application Information

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IPC IPC(8): G01S7/02G01S7/36G01S7/41G01S13/02G01S13/72
CPCG01S7/023G01S7/36G01S7/414G01S13/02G01S13/726G01S2013/0254
Inventor 季帅王敬东谢欢欢
Owner NO 20 RES INST OF CHINA ELECTRONICS TECH GRP
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