Signal detection method, device and radar system
A signal detection and radar technology, which is applied in the field of radar, intelligent control or unmanned transportation, can solve the problems that the target radar is difficult to detect the real target, waste time and resources, and the radar working cycle becomes longer.
Active Publication Date: 2022-05-24
HUAWEI TECH CO LTD
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Problems solved by technology
There are many multi-radar networking scenarios in real-world scenarios. For example, when a smart traffic radar is deployed at a crossroad, the target radar will also receive other signals while receiving the detection signal emitted by itself, forming a false alarm target. , making it difficult for the target radar to correctly detect the real target, causing interference
[0003] To solve the above problems, one method is to stagger the operating frequency of the radar so that the interference signal falls outside the wideband range of the radar receiver after mixing, but this method will seriously affect the distance resolution of the radar
[0004] Another method is to solve the interference problem based on time synchronization, but this solution will greatly waste time resources, resulting in a longer working cycle of the radar, and the adjustable time range is limited
[0005] Another method is to solve interference based on code division multiple access. This solution has a certain suppression effect on interference signals (about 10dB), but there is no way to completely eliminate interference and false alarms, and even bring low noise. The lift of and the lift of the side lobes
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[0085] The technical solutions in the present application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.
[0086] like figure 1 Shown is a schematic diagram of a scenario where the multi-radar networking 100 works. In order to facilitate the understanding of the solutions of the embodiments of the present application, the following first describes the figure 1 The working principle of the multi-radar networking shown. But it should be understood that figure 1 It only exemplarily shows the position or state of the multi-radar network, and other forms are also possible, and this application should not be particularly limited.
[0087] like fig...
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Embodiments of the present application provide a signal detection method, device, and radar system, which can be applied to the fields of Internet of Vehicles, smart cars, automatic driving, or intelligent driving. The method includes: the first radar transmits a first detection signal in a first period of a first frame; the first radar transmits a second detection signal in a second period of the first frame; the first radar receives a signal corresponding to the first A reflection signal of a detection signal and a second detection signal; the first radar determines a false alarm target according to the difference between the first distance-velocity spectrum and the second distance-velocity spectrum; wherein, the second detection signal is based on the first The detection signal is a signal obtained after the first phase encoding modulation is performed. Through this scheme, false alarm targets can be determined and real targets can be identified, thereby improving the probability and reliability of correct target detection.
Description
technical field [0001] The present application relates to the field of radar technology, and in particular, to a signal detection method, device and radar system, which can be applied to the fields of automatic driving or intelligent driving, or the fields of intelligent control or unmanned transportation. Background technique [0002] With the development of radar technology, radar anti-jamming technology is facing more and more difficulties. There are many scenarios of multi-radar networking in real scenarios. For example, for smart traffic radars deployed at intersections, the target radar will receive other signals while receiving the transmitted signal of its own detection signal, forming a false alarm target. , making it difficult for the target radar to detect the real target correctly, thus causing interference. [0003] To solve the above problems, one method is to stagger the operating frequency points of the radar, so that the interference signal falls outside th...
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IPC IPC(8): G01S7/41G01S13/87
CPCG01S7/411G01S13/87G01S13/343G01S13/345G01S7/0234G01S13/584G01S13/931G01S7/0233G01S7/0235G01S13/34G01S13/58G01S7/356
Inventor 许少峰赵启勇朱玉堂
Owner HUAWEI TECH CO LTD