Fourier multi-beam forming method of transformation point number optimization design
An optimized design and Fourier technology, applied in design optimization/simulation, special data processing applications, etc., can solve problems such as increased detection resource consumption, increased number of beams, and increased fusion processing pressure
Pending Publication Date: 2021-01-12
中国船舶集团有限公司第七二四研究所 +1
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[0003] The purpose of the present invention is to provide a Fourier multi-beam forming method with optimal design of transform points, through the optimal design of Fourier transform points, it can effectively solve the problem of increasing the number of beams caused by the extensive design in traditional receiving multi-beam systems, Detect problems such as increased consumption of resources and increased pressure on fusion processing
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[0015]The technical solution will be described in detail below with reference to the drawings and specific implementation examples of the present invention.
[0016]The main technical parameters of this example are shown in the following table:
[0017]Table 2 Main technical parameters of the embodiment
[0018] Array method One-dimensional linear uniform linear array Number of elements M 80 Working frequency f c
3GHz Array element spacing d 0.05m Expected overlap point of adjacent beams –3dB Sidelobe level –25dB, Taylor window Airspace of interest Azimuth dimension [–45°, 45°]
[0019]figure 1 Shown is a flowchart of the present invention. According to the figure, the specific implementation steps of this example are:
[0020]Step 1: Find the preliminary number of Fourier transform points according to the number of array echoes and the expected value of the overlap point of adjacent beams;
[0021]In this example, the one-dimensional uniform linear array is composed of M isotropic antenna el...
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The invention discloses a Fourier multi-beam forming method of transformation point number optimization design, which can reduce the number of beams required for full coverage of an interested airspace under the condition of ensuring that the overlapping of adjacent beams meets the expectation through the optimal design of the Fourier transform points. The digital multi-beam forming method based on the transformation point optimization design can effectively solve the problems that in a traditional multi-beam receiving system, due to the adoption of extensive design, the number of beams is increased, detection consumed resources are increased, and fusion processing pressure is increased; the resource consumption and complexity of beam signal detection, beam information fusion and other processing can be reduced.
Description
Technical field[0001]The invention belongs to the field of digital beam forming processing, and relates to digital multi-beam forming processing based on Fourier transform.Background technique[0002]An important advantage of the digital array is the electronic scanning capability, which is mainly manifested in flexible beam pointing control and simultaneous multi-beam forming processing. Receiving multiple beams at the same time can greatly improve the system functions of the digital array, including instantaneous coverage of wide airspace, reducing scanning time and increasing data update rate. Discrete Fourier Transformation (DFT, Discrete Fourier Transformation) processing on the array echo signals can form simultaneous multiple beams. In digital signal processing chips such as FPGAs, in order to be able to use Fast Fourier Transformation (FFT) to reduce the complexity of Fourier Transform implementation, traditional implementations often use zero-padding methods to make the numbe...
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IPC IPC(8): G06F30/20
CPCG06F30/20
Inventor 高杨丁志辉张志武童卫勇
Owner 中国船舶集团有限公司第七二四研究所