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High resolution imaging method for synthetic bandwidth radar

An imaging method and high-resolution technology, applied in the field of signal processing, can solve problems such as inability to obtain high-resolution images, and achieve the effect of ensuring imaging effects

Active Publication Date: 2015-02-18
睿通科达(天津)科技有限公司
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  • Claims
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Problems solved by technology

However, the existing methods cannot obtain better high-resolution images when more frequency points are lost.

Method used

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  • High resolution imaging method for synthetic bandwidth radar
  • High resolution imaging method for synthetic bandwidth radar
  • High resolution imaging method for synthetic bandwidth radar

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Embodiment Construction

[0025] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0027] In the present invention, unless otherwise clearly specified...

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Abstract

The invention discloses a high resolution imaging method for synthetic bandwidth radar. The method includes the following steps that N pulses are transmitted by the synthetic bandwidth radar; a receiving signal is acquired from the n pulse, and a complex sample is acquired; carrier frequency points capable of enabling samples to be correctly acquired are selected from all signal samples of different carrier frequencies; from available complex samples, self correlation is counted, and the correlation value of the self correlation is acquired; a correlation matrix is generated according to the order of the correlation matrix and the correlation value of the self correlation; the correlation matrix is subjected to characteristic decomposition to generate a plurality of characteristic values; the characteristic values are ranked, and a target characteristic value and characteristic space corresponding to the target characteristic value are selected; accordingly, the positions of scattering points are extracted, and then scattering point steering vectors corresponding to the scattering points are acquired; high resolution images can be synthesized according to the positions of the scattering points and the scattering point steering vectors corresponding to the scattering points. By the adoption of the method, high resolution imaging can be well conducted on a target area under the condition of sampling lacking, and thus the imaging effect under an interference condition is guaranteed.

Description

technical field [0001] The invention relates to the technical field of signal processing, in particular to a synthetic bandwidth radar high-resolution imaging method. Background technique [0002] The distance resolution of the radar depends on the bandwidth of the radar signal. The large bandwidth signal required by the high-resolution radar will increase the complexity of the system, and the receiving bandwidth of the receiver is also required to be large, which will cause problems such as large noise energy. Synthetic bandwidth radar synthesizes a large bandwidth signal by transmitting a group of pulses with different carrier frequencies, so that high-resolution images can be obtained. However, due to the large bandwidth of the signal, it is susceptible to interference from various electromagnetic signals in the environment and radar signals of the enemy and us working in the same frequency band, which will affect the receiving signal of some carrier frequencies. The usu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/89
CPCG01S13/89
Inventor 刘一民胡杨王希勤孟华东
Owner 睿通科达(天津)科技有限公司
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