阅读说明：本技术 基于数字波束形成的目标分辨方法、存储介质及电子设备 (Target distinguishing method based on digital beam forming, storage medium and electronic equipment ) 是由 张容权 于 2020-04-17 设计创作，主要内容包括：本公开涉及雷达探测技术领域,具体涉及一种基于数字波束形成的目标分辨方法、存储介质及电子设备,解决了相关技术中多目标角度分辨困难的技术问题。方法包括：获取多个目标的回波信号,并根据回波信号得到所述数字波束；根据所述数字波束获取对应的所述目标的点迹信息；根据点迹信息确定出检测到同一目标的数字波束；根据各数字波束通道幅度关系以及各数字波束中心指向,进行多目标角度分辨以及获取所述目标的角度。(The disclosure relates to the technical field of radar detection, in particular to a digital beam forming-based target resolution method, a storage medium and electronic equipment, and solves the technical problem of difficulty in multi-target angle resolution in the related art. The method comprises the following steps: acquiring echo signals of a plurality of targets, and obtaining the digital wave beam according to the echo signals; acquiring corresponding trace point information of the target according to the digital wave beam; determining digital beams of the same target according to the trace information; and carrying out multi-target angle resolution and obtaining the angle of the target according to the amplitude relation of each digital beam channel and the center pointing direction of each digital beam.)

1. A method for resolving an object based on digital beamforming, the method comprising:

acquiring echo signals of a plurality of targets, and obtaining corresponding digital beams according to the echo signals;

acquiring corresponding trace point information of the target according to the digital wave beam;

determining digital beams of the same target according to the trace point information;

and performing multi-target resolution and acquiring the angle of the target according to the amplitude relation of each digital beam channel and the center pointing direction of each digital beam.

2. The method of claim 1, wherein acquiring echo signals of a plurality of targets and deriving corresponding digital beams from the echo signals comprises:

and forming corresponding digital beams according to the echo signals of the targets received by the multiple receiving channels and the steering vectors of the echo signals, and screening the digital beams meeting the preset requirements through a window function.

3. The method of claim 1, wherein obtaining the corresponding target's tracking information from the digital beam comprises:

and carrying out pulse compression, coherent accumulation and constant false alarm detection processing on the digital beam to obtain corresponding trace point information of the target.

4. The method of claim 3, wherein the trace point information comprises range information, amplitude information, and Doppler information of a target.

5. The method of claim 4, wherein the Doppler information comprises a Doppler gate number, and wherein determining digital beams that detect the same target from the speckle information comprises:

and determining the trace point information with the same distance and the same Doppler gate number as multiple targets which are temporarily unresolved in the same target or angle, namely detecting the multiple targets which are temporarily unresolved in the same target or angle by the digital beam corresponding to the trace point information.

6. The method of claim 1, wherein performing multi-target angle resolution and obtaining the angle of the target based on the magnitude relationship of each of the digital beam channels and the central pointing direction of each of the digital beams comprises:

acquiring the angle interval of the target according to the center pointing direction of each digital beam;

and when the angle interval of the target is lower than the angle Rayleigh resolution, judging that the target is a single target, and obtaining the target angle based on a preset formula and the trace point information.

7. The method of claim 1, wherein performing multi-target angle resolution and obtaining the angle of the target based on the magnitude relationship of each of the digital beam channels and the central pointing direction of each of the digital beams comprises:

when the target is detected in two adjacent digital beams, the target is a single target, and the target angle is obtained based on a preset formula and the trace point information.

8. The method of claim 1, wherein performing multi-target angle resolution and obtaining the angle of the target based on the magnitude relationship of each of the digital beam channels and the central pointing direction of each of the digital beams comprises:

when the target is detected in three or more adjacent digital beams, the target is determined to be multiple targets, the target angle interval is 1-2 times of the width of the digital beams, and the target angle is obtained based on a preset formula and the trace point information.

9. The method of claim 1, wherein performing multi-target angle resolution and obtaining the angle of the target based on the magnitude relationship of each of the digital beam channels and the central pointing direction of each of the digital beams comprises:

when the target is detected in the digital wave beams which are not adjacent and at least two local maximum amplitude values appear, the target is determined to be multiple targets, the target angle interval is more than 2 times of the width of the digital wave beams, and the target angle is obtained based on a preset formula and the trace point information.

10. A storage medium storing a computer program executable by one or more processors to perform the digital beamforming based target resolution method of any of claims 1-9.

11. An electronic device, comprising a memory and a processor, the memory having a computer program stored thereon, the memory and the processor being communicatively connected to each other, the computer program, when executed by the processor, performing the digital beamforming based object resolution method as claimed in any of claims 1 to 9.

Technical Field

The present disclosure relates to the field of radar detection technologies, and in particular, to a target resolving method based on digital beamforming, a storage medium, and an electronic device.

Background

"Low slow small" targets in high air are difficult to detect in a strong clutter background due to low signal to clutter ratio. While the signal-to-noise ratio required for "slow-to-small" target detection is increased, primarily by increasing the accumulation time of the illuminated target. In order to increase the accumulation time of the target and not sacrifice the data rate of the target search, for the three-coordinate radar, simultaneous multi-beam coverage in pitching can be adopted, namely pitching Digital Beam Forming (DBF) is adopted, and the technology is favorable for reliably and stably detecting the low-slow small target in the strong clutter background.

In the pitch simultaneous digital multi-beam forming technology, when the amplitude information of a plurality of beam targets is used for carrying out weighted average angle solving, a plurality of targets are difficult to distinguish in angle, namely, the pitch angle resolution of the targets is lost.

Disclosure of Invention

In view of the above problems, the present disclosure provides a method, a storage medium, and an electronic device for resolving a target based on digital beamforming, which solve the technical problem of difficulty in resolving a multi-target angle in the related art.

In a first aspect, the present disclosure provides a method for object resolution based on digital beamforming, the method comprising:

acquiring echo signals of a plurality of targets, and obtaining corresponding digital beams according to the echo signals;

acquiring corresponding trace point information of the target according to the digital wave beam;

determining digital beams of the same target according to the trace point information;

and performing multi-target resolution and acquiring the angle of the target according to the amplitude relation of each digital beam channel and the center pointing direction of each digital beam.

According to an embodiment of the present disclosure, optionally, in the above target resolution method based on digital beam forming, acquiring echo signals of a plurality of targets, and obtaining corresponding digital beams according to the echo signals, includes:

and forming corresponding digital beams according to the echo signals of the targets received by the multiple receiving channels and the steering vectors of the echo signals, and screening the digital beams meeting the preset requirements through a window function.

According to an embodiment of the present disclosure, optionally, in the above method for resolving a target based on digital beam forming, acquiring the corresponding track information of the target according to the digital beam includes:

and carrying out pulse compression, coherent accumulation and constant false alarm detection processing on the digital beam to obtain corresponding trace point information of the target.

According to an embodiment of the present disclosure, optionally, in the above target resolution method based on digital beam forming, the trace information includes distance information, amplitude information, and doppler information of the target.

According to an embodiment of the present disclosure, optionally, in the above method for resolving a target based on digital beam forming, the doppler information includes a doppler gate number, and determining a digital beam that detects the same target according to the trace information includes:

and determining the trace point information with the same distance and the same Doppler gate number as multiple targets which are temporarily unresolved in the same target or angle, namely detecting the multiple targets which are temporarily unresolved in the same target or angle by the digital beam corresponding to the trace point information.

According to an embodiment of the present disclosure, optionally, obtaining the angle of the target based on the amplitude relationship of each digital beam channel and the angle interval of the target includes: and when the angle interval of the target is lower than the angle Rayleigh resolution, judging that the target is a single target, and obtaining the target angle based on a preset formula and the trace point information.

According to an embodiment of the present disclosure, optionally, in the above target resolution method based on digital beam forming, performing multi-target resolution and acquiring an angle of the target according to an amplitude relationship of each digital beam channel and a central pointing direction of each digital beam, includes:

when the target is detected in two adjacent digital beams, the target is a single target, and the target angle is obtained based on a preset formula and the trace point information.

According to an embodiment of the present disclosure, optionally, in the above target resolution method based on digital beam forming, performing multi-target resolution and acquiring an angle of the target according to an amplitude relationship of each digital beam channel and a central pointing direction of each digital beam, includes:

when the target is detected in three or more adjacent digital beams, the target is determined to be multiple targets, the target angle interval is 1-2 times of the width of the digital beams, and the target angle is obtained based on a preset formula and the trace point information.

According to an embodiment of the present disclosure, optionally, in the target resolution method based on digital beam forming, performing multi-target resolution and acquiring an angle of the target according to the amplitude relationship of each digital beam channel and the central pointing direction of each digital beam includes:

when the target is detected in the digital wave beams which are not adjacent and at least two local maximum amplitude values appear, the target is determined to be multiple targets, the target angle interval is more than 2 times of the width of the digital wave beams, and the target angle is obtained based on a preset formula and the trace point information.

In a second aspect, the present disclosure provides a storage medium storing a computer program, executable by one or more processors, operable to implement a digital beamforming based multi-target resolution method as described above.

In a third aspect, the present disclosure provides an electronic device comprising a memory and a processor, the memory having a computer program stored thereon, the memory and the processor being communicatively connected to each other, the computer program, when executed by the processor, performing the above-mentioned object resolution method based on digital beamforming.

Compared with the prior art, one or more embodiments in the above scheme can have the following advantages or beneficial effects:

the present disclosure provides a target resolution method based on digital beam forming, a storage medium and an electronic device, wherein the method includes: acquiring echo signals of a plurality of targets, and obtaining corresponding digital beams according to the echo signals; acquiring trace point information of a corresponding target according to the digital wave beam; determining digital beams of the same target according to the trace information; and performing multi-target resolution and acquiring the angle of the target according to the amplitude relation of each digital beam channel and the center pointing direction of each digital beam. The method realizes multi-target angle resolution and completes the angle estimation of the target through each digital beam channel, the amplitude relation and the center pointing direction of each digital beam.

Drawings

The present disclosure will be described in more detail below based on embodiments and with reference to the accompanying drawings.

Fig. 1 is a schematic flowchart of a digital beam forming-based target resolution method according to an embodiment of the present disclosure;

fig. 2 is a diagram of receiving echo signals formed by digital beam forming based on a target resolution method of digital beam forming according to an embodiment of the present disclosure;

fig. 3 is a schematic flow chart of a method for resolving a target based on digital beam forming according to an embodiment of the present disclosure, where the method obtains an angle of the target based on an amplitude relationship between digital beam channels and a center pointing direction;

fig. 4 is an amplitude distribution diagram of a single target in a target resolution method based on digital beam forming according to an embodiment of the present disclosure;

fig. 5 is an amplitude distribution diagram of a target being a plurality of targets of a target resolution method based on digital beam forming according to an embodiment of the present disclosure;

FIG. 6 is another amplitude distribution plot for a target-multiple target based digital beamforming target resolution method according to an embodiment of the present disclosure;

fig. 7 is a connection block diagram of an electronic device according to a third embodiment of the disclosure.

In the drawings, like parts are designated with like reference numerals, and the drawings are not drawn to scale.

Detailed Description

Embodiments of the present disclosure will be described in detail with reference to the accompanying drawings and examples, so that how to apply technical means to solve technical problems and achieve the corresponding technical effects can be fully understood and implemented. The embodiments and the features of the embodiments of the present disclosure can be combined with each other without conflict, and the formed technical solutions are all within the protection scope of the present disclosure.

The present disclosure provides a target resolving method based on digital beam forming, a storage medium and an electronic device, the method including: acquiring echo signals of a plurality of targets, and obtaining corresponding digital beams according to the echo signals; acquiring trace point information of a corresponding target according to the digital wave beam; determining digital beams of the same target according to the trace information; and performing multi-target resolution and acquiring the angle of the target based on the amplitude relation of each digital beam channel and the central direction of each digital beam. The technical problem that the multi-target angle resolution of the digital multi-beam technology is difficult is solved.