SSTMV minimum variance beam forming method for wideband radar

A minimum variance, broadband radar technology, applied in radio wave measurement systems, instruments, etc., can solve the problem of low applicability of broadband radar, and achieve the effect of reducing algorithm calculation, improving spatial resolution, and improving output signal-to-noise ratio.

Inactive Publication Date: 2018-03-09
杭州睿达汽车科技有限公司
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Problems solved by technology

Therefore, the applicability of MVDR to wideband radar is not high

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  • SSTMV minimum variance beam forming method for wideband radar
  • SSTMV minimum variance beam forming method for wideband radar
  • SSTMV minimum variance beam forming method for wideband radar

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Embodiment Construction

[0045] The present invention will be described in detail below in conjunction with specific embodiments. The following example is taken as an example to illustrate the present invention, and the present invention can be extended to other matrix and antenna arrangement structures.

[0046] Embodiments of the present invention are as follows:

[0047] The basic array in the example of the present invention is a 12-element linear array, which is composed of M array elements evenly arranged, wherein M represents the number of array elements, the transmission signal is a single-frequency pulse, and the processing environment is broadband.

[0048] Such as figure 1 Shown is a flowchart of an adaptive beamforming method according to an embodiment of the present invention, which includes the following steps: firstly, transmit single-frequency pulse data is provided, and then complex demodulation and data rate reduction are performed. In this example, in order to reduce the amount of...

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Abstract

The invention discloses an SSTMV minimum variance beam forming method for wideband radar. Array data is obtained by an antenna of the wideband radar, iterative segmentation and FFT conversion are conducted on the array data to obtain array frequency domain data, and conventional beam forming treatment is conducted on the array frequency domain data through a weighting vector for conventional beamforming; sub-array division and combination are conducted on the array frequency domain data obtained after conventional beam forming treatment to obtain sub-array data; calculation and accumulation of an STCM driving covariance matrix are conducted on the sub-array data, and the beam forming of a minimum variance wideband direction-finding algorithm is conducted through the obtained STCM matrix to obtain the minimum variance beam. By means of the method, the radar space resolution capacity can be effectively improved, good performance can be presented under a small number of periods without accumulating or modifying too large number of periods due to the coherent accumulation characteristic of SSTMB, and the method greatly reduces the calculation amount of the algorithm and is suitable for the wideband radar.

Description

technical field [0001] The invention relates to the field of radar signal processing, in particular to an SSTMV (subarray driving) minimum variance beamforming method for wideband radar. Background technique [0002] Beamforming technology can actually be understood as a spatial filter, through which high azimuth resolution can be obtained. In the practical application of radar, the adaptive beamforming algorithm with high resolution and low sidelobe level can separate the target from the main lobe of clutter, suppress the sidelobe of clutter, and extract the target more accurately. [0003] Commonly used traditional adaptive beamforming methods such as minimum variance distortion-free beamforming (MVDR) are based on narrowband conditions, but because they do not use the signal time-bandwidth product characteristics, MVDR requires a large number of cycles to continuously correct under wideband processing conditions to achieve better performance. For wideband radar, the rec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/28
CPCG01S7/2813
Inventor 董晋丁永超姚衡程豪
Owner 杭州睿达汽车科技有限公司
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