A multi-stage correction method, device, medium and system based on DBF processing

Abstract

The application discloses a multi-stage correction method and device based on DBF processing, a medium and a system, and belongs to the field of digital beam forming, and comprises the following steps: performing analog-digital conversion on analog signals of N channels input from outside through an ADC interface to obtain digital signals; performing channelization multi-item filtering processing on the digital signals of the N channels after synchronization processing, so that baseband I / Q data in each channel is obtained; performing operation on the baseband I / Q data of all channels to obtain amplitude and phase data, and then reporting the data to control software; the control software performs amplitude and phase compensation according to the amplitude and phase data reported by all channels, generates an IQ stage correction table, and issues the correction table, so that time domain IQ stage data correction is completed; after the IQ correction table is loaded and used, second correction is started. The application can improve the correction accuracy of different frequency points of the DBF system, and can effectively improve the combat effectiveness of equipment in a complex electromagnetic environment.

Description

Technical Field

[0001] This invention relates to the field of digital beamforming, and more specifically, to a multi-level correction method, device, medium, and system based on DBF processing. Background Technology

[0002] Modern equipment often requires not only high-sensitivity receiving and processing capabilities in complex electromagnetic environments, but also flexible spatial filtering capabilities. The realization of these capabilities depends on whether the system has accurate beam pointing and low sidelobe levels. Existing equipment often uses IQ-level data correction to achieve amplitude and phase correction of the channel. Although this method can meet the usage requirements of most systems in most situations, it does not have the ability to distinguish different frequencies within the channel. Only one set of amplitude and phase information can be extracted from a channel, resulting in different pointing accuracy of the beam at different frequencies and some degradation of the sidelobe level. This affects the system's high-sensitivity receiving capability and spatial filtering capability, making it difficult to meet the accuracy requirements of some system parameter measurements.

[0003] To effectively address the aforementioned issues and enable the system to simultaneously possess high-sensitivity receiving and processing capabilities as well as spatial filtering capabilities, a multi-stage correction method based on DBF processing is proposed. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a multi-level correction method, device, medium and system based on DBF processing. By adopting a processing architecture of IQ-level data correction and PDW-level pulse correction, the correction accuracy of different frequency points of the DBF system can be improved, which can effectively improve the combat effectiveness of equipment in complex electromagnetic environments.

[0005] The objective of this invention is achieved through the following approach: A multi-level correction method based on DBF processing includes the following steps: Step 1): The analog signals from the N external input channels are converted from analog to digital through the ADC interface to obtain digital signals; Step 2) Perform channelized multi-level filtering on the digital signals after synchronous processing of N channels to obtain the baseband I / Q data in each channel; Step 3) Perform calculations on the baseband I / Q data of all channels to obtain amplitude and phase data, and then report the data to the control software; Step 4): The control software performs amplitude and phase compensation based on the amplitude and phase data reported by all channels, generates an IQ-level correction table, and sends the correction table down to complete the time-domain IQ-level data correction. Step 5): After loading and using the IQ calibration table, begin the second calibration; Step 6), complete steps 1) to 5) above. Step 7): After the parameter measurement is completed, the PDW data will select whether to call the PDW calibration table when passing through the PDW calibration module, depending on the current working mode. Step 8): The control software generates a PDW-level calibration table based on the reported PDW data, and completes the PDW-level pulse calibration.

[0006] Furthermore, the ADC interface adopts the 204B interface.

[0007] Furthermore, the N channels specifically refer to 8 channels.

[0008] Furthermore, the channel is specifically a 64-channel system.

[0009] Furthermore, the operation is specifically a DFT operation.

[0010] A multi-level correction device based on DBF processing includes a processor and a memory, wherein the memory stores a computer program that, when loaded by the processor, executes the method described in any of the preceding claims.

[0011] A computer-readable storage medium storing a computer program that, when loaded by a processor, executes the method described in any of the preceding claims.

[0012] A multi-level correction system based on DBF processing includes the multi-level correction device based on DBF processing as described above.

[0013] The beneficial effects of this invention include: By employing the multi-level correction method based on DBF processing provided by this invention, the system can achieve the following performance improvements: 1) Higher beam pointing accuracy. Specifically, the multi-level correction processing architecture based on DBF processing used in the method of this invention can effectively improve the system correction accuracy. On the basis of the signal time-domain IQ level correction, PDW pulse level correction is added to further improve the correction accuracy, thereby improving the pointing accuracy of the synthesized beam of the system.

[0014] 2) Lower sidelobe levels. Specifically, the method of this invention adopts a multi-stage correction processing architecture based on DBF processing. By adding PDW-level correction on the basis of the original single-stage correction, the sidelobe level can be reduced, effectively improving the main-sidelobe ratio. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a flowchart of a method according to an embodiment of the present invention. Detailed Implementation

[0017] All features disclosed in all embodiments of this specification, or steps in all methods or processes implied in the disclosure, may be combined and / or extended or replaced in any way, except for mutually exclusive features and / or steps.

[0018] The specific implementation process of this invention is as follows: In a preferred embodiment, such as Figure 1 As shown, a multi-level correction method based on DBF processing is specifically provided, and its specific steps are as follows: Step 1): The analog signals from the N external input channels are converted from analog to digital through the ADC interface to obtain digital signals; Step 2) Perform channelized multi-level filtering on the digital signals after synchronous processing of N channels to obtain the baseband I / Q data in each channel; Step 3) Perform DFT operation on the baseband I / Q data of all channels to obtain amplitude and phase data, and then report the data to the control software; Step 4): The control software performs amplitude and phase compensation based on the amplitude and phase data reported by all channels, generates an IQ-level correction table, and sends the correction table down to complete the time-domain IQ-level data correction. Step 5): After loading and using the IQ calibration table, the system begins the second calibration. Step 6): First, complete steps 1) to 5) above. Step 7): After the parameter measurement is completed, the PDW data will select whether to call the PDW calibration table when passing through the PDW calibration module, depending on the current working mode. Step 8): The control software generates a PDW-level calibration table based on the reported PDW data, and completes the PDW-level pulse calibration.

[0019] In other embodiments, based on the above embodiments, a multi-level correction method based on DBF processing is provided, employing a multi-level correction processing architecture based on DBF processing. The specific implementation steps are as follows: S1 uses a 1.28GHz sampling rate to complete the analog-to-digital conversion of the eight acquisition channels, and the ADC interface adopts a 204B interface; S2 performs 64-channel channelized multi-level filtering on the digital signals after synchronous processing of 8 channels to obtain baseband I / Q data in each channel, with a channel bandwidth of 10MHz; S3 extracts amplitude and phase data from the I / Q data of all channels and then reports the data to the control software; S4, the control software generates an IQ-level calibration table based on the calibration results and sends the calibration table out to complete the IQ-level calibration; S5, after loading and using the IQ calibration table, the system begins the second calibration; S6, the control software generates a PDW-level calibration table based on the PDW data reported in the second calibration, and completes the PDW-level pulse calibration.

[0020] By adopting the above-described embodiments, the system not only possesses high-sensitivity receiving capabilities and spatial filtering capabilities, but also further improves beam pointing accuracy, reduces sidelobe levels, effectively enhances the system's parameter measurement accuracy, and further improves the system's combat effectiveness.

[0021] The units described in the embodiments of the present invention can be implemented in software or hardware, and the described units can also be located in a processor. The names of these units do not necessarily limit the specific unit itself.

[0022] According to one aspect of the present invention, a computer program product or computer program is provided, the computer program product or computer program including computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium, and executes the computer instructions, causing the computer device to perform the methods provided in the various optional implementations described above.

[0023] In another aspect, embodiments of the present invention also provide a computer-readable medium, which may be included in the electronic device described in the above embodiments; or it may exist independently and not assembled into the electronic device. The computer-readable medium carries one or more programs, which, when executed by the electronic device, cause the electronic device to perform the methods described in the above embodiments.

Claims

1. A multi-level correction method based on DBF processing, characterized in that, Includes the following steps: Step 1): The analog signals from the N external input channels are converted from analog to digital through the ADC interface to obtain digital signals; Step 2) Perform channelized multi-level filtering on the digital signals after synchronous processing of N channels to obtain the baseband I / Q data in each channel; Step 3) Perform calculations on the baseband I / Q data of all channels to obtain amplitude and phase data, and then report the data to the control software; Step 4): The control software performs amplitude and phase compensation based on the amplitude and phase data reported by all channels, generates an IQ-level correction table, and sends the correction table down to complete the time-domain IQ-level data correction. Step 5): After loading and using the IQ calibration table, begin the second calibration; Step 6), complete steps 1) to 5) above. Step 7): After the parameter measurement is completed, the PDW data will select whether to call the PDW calibration table when passing through the PDW calibration module, depending on the current working mode. Step 8): The control software generates a PDW-level calibration table based on the reported PDW data, and completes the PDW-level pulse calibration.

2. The multi-level correction method based on DBF processing according to claim 1, characterized in that, The ADC interface uses a 204B interface.

3. The multi-level correction method based on DBF processing according to claim 1, characterized in that, The N channels specifically refer to 8 channels.

4. The multi-level correction method based on DBF processing according to claim 1, characterized in that, The channel is specifically 64 channels.

5. The multi-level correction method based on DBF processing according to claim 1, characterized in that, The operation is specifically a DFT operation.

6. A multi-level calibration device based on DBF processing, characterized in that, It includes a processor and a memory, wherein the memory stores a computer program that, when loaded by the processor, executes the method as described in any one of claims 1 to 5.

7. A computer-readable storage medium, characterized in that, A computer program is stored in a readable storage medium, the computer program being loaded by a processor and executing the method as described in any one of claims 1 to 5.

8. A multi-level correction system based on DBF processing, characterized in that, Includes the multi-level correction device based on DBF processing as described in claim 6.

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