Bistatic MIMO radar fault array element diagnosis method based on waveform similarity

A technology of waveform similarity and diagnosis method, applied in radio wave measurement systems, instruments, etc., can solve the problems of inability to correctly diagnose faulty array elements, low diagnosis accuracy, etc., to solve fast and accurate diagnosis problems, fast calculation speed, High real-time effects

Active Publication Date: 2019-05-21
NANJING UNIV OF INFORMATION SCI & TECH
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Problems solved by technology

This method can self-diagnose the faulty array element by using the received signal of the array without using auxiliary array elements and measuri...

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  • Bistatic MIMO radar fault array element diagnosis method based on waveform similarity
  • Bistatic MIMO radar fault array element diagnosis method based on waveform similarity
  • Bistatic MIMO radar fault array element diagnosis method based on waveform similarity

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Embodiment Construction

[0026] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0027]Bistatic MIMO radars are usually composed of multiple antenna elements, but due to the limited life of the element components or the impact of harsh natural environments, faulty elements will inevitably appear in the radar array. The appearance of faulty elements not only destroys the antenna array structure, but also reduces the detection performance of the target. In order to improve the self-diagnosis ability of the faulty array element of the bistatic MIMO radar, the invention provides a diagnosis method for the faulty array element of the bistatic MIMO radar based on the waveform similarity. The bistatic MIMO radar receiving array signal will form a virtual array composed of multiple virtual array elements after matched filtering. According to the narrowband transmitting signal and the structural characteristics of the receiving and rece...

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Abstract

The invention discloses a bistatic MIMO radar fault array element diagnosis method based on waveform similarity. A bistatic MIMO radar receiving array signal forms a virtual array composed of a plurality of virtual array elements after being subjected to matched filtering; a virtual array element output signal corresponding to a fault array element in the transmitting or receiving array does not contain target information and only contains noise, the noise and the signal have the characteristics of independence and non-correlation; therefore, the virtual array element output signal waveform corresponding to the fault array element is highly different from the output signal waveforms of other virtual array elements, namely, the cross-correlation value of the output signals of the fault array element and the rest array elements is close to zero, so that the positions of the fault array elements in the bistatic MIMO radar transmitting and receiving array can be diagnosed by comparing thewaveform similarity among the output signals of the virtual array elements. According to the method, an auxiliary array element and measurement equipment are not needed, and accurate and rapid self-diagnosis can be carried out on array elements with faults at any position under the condition of low signal to noise ratio.

Description

technical field [0001] The invention belongs to the field of radar fault array element diagnosis, in particular to a bistatic MIMO radar fault array element diagnosis method based on waveform similarity. Background technique [0002] Bistatic MIMO (Multiple-Input Multiple-Output) radar is a MIMO radar that places the transceiver arrays in different positions. The signals of each channel of the transmitting array are orthogonal to each other, forming a wide beam with low gain in space; the receiving array adopts Matched filtering separates each transmitted signal component, realizes waveform diversity, and forms a large virtual array aperture at the receiving end to improve the angle estimation accuracy of the radar and increase the maximum number of resolvable targets. Therefore, bistatic MIMO radar has attracted more and more attention from scholars. [0003] In practical applications, due to factors such as device aging and harsh natural environments, radar antenna arrays...

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Application Information

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IPC IPC(8): G01S7/40
Inventor 陈金立张廷潇李家强陈宣
Owner NANJING UNIV OF INFORMATION SCI & TECH
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