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

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...

AI Technical Summary

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 measuring equipment. When the differential array elements in the position fail at the same time, this method cannot correctly diagnose the faulty array elements

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