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Frequency band fusion method and device based on adaptive iteration scheme

A technology of iterative self-adaptation and fusion method, which is applied in the field of frequency band fusion method and device based on iterative self-adaptive method, can solve the problems that estimation accuracy is easily affected by noise and poor robustness, and achieves strong anti-noise ability, avoiding errors, Estimate the effect of high precision

Active Publication Date: 2014-03-12
INST OF ELECTRONICS CHINESE ACAD OF SCI
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Problems solved by technology

[0018] The technical problem to be solved by the present invention is to provide an iterative self-adaptive method based on the problem that the estimation accuracy of the current conventional spectrum estimation method is easily affected by noise, the robustness is poor, and the number of target scattering centers is required as prior knowledge. multi-band fusion method

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  • Frequency band fusion method and device based on adaptive iteration scheme
  • Frequency band fusion method and device based on adaptive iteration scheme
  • Frequency band fusion method and device based on adaptive iteration scheme

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Embodiment Construction

[0036] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0037] The present invention proposes a frequency band fusion method based on an iterative adaptive method, such as figure 1 As shown, it specifically includes:

[0038] Step S1: Receive the echo signal of the multi-band radar, use the all-phase fast Fourier transform method to estimate the initial phase difference and the linear phase difference between the echo signals of the multi-band radar target, and then return the multi-band radar target The initial phase difference and linear phase difference between wave signals are coherently compensated;

[0039] Step S2: Establish a multi-band radar signal fusion model according to the compensated multi-band radar target echo signal;

[0040] Step S3: According to the multi...

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Abstract

The invention discloses a frequency band fusion method and device based on an adaptive iteration scheme. The method comprises that 1) a multiband radar signal fusion model is established; 2) an initial phase difference and a linear phase difference of each frequency band radar signal are estimated via an all phase fast Fourier transform (apFTT) algorithm, and coherent compensation is carried on each frequency band radar signal; and 3) and multiband signal fusion can be realized for the frequency band radar signals after coherent processing via the adaptive iteration scheme. According to the method and device, the phase differences of the frequency band radar signals are estimated via the apFTT algorithm, thereby improving the estimation precision for the phase differences, and avoiding that estimation errors of radar signal model parameters caused by noises in a routine algorithm influence the subsequent coherent compensation precision and final fuse imaging quality. At the same time, fusion is carried out on the frequency band radar signals after coherent processing directly through the adaptive iteration scheme, thereby overcoming the difficulty in data prediction for blank frequency domains as required in a routine frequency band fusion algorithm.

Description

technical field [0001] The invention belongs to the field of target detection, and in particular relates to a frequency band fusion method and device based on an iterative adaptive method. Background technique [0002] In radar imaging, the range resolution is determined by the bandwidth of the radar transmission signal. The acquisition of high range resolution needs to increase the bandwidth of the radar system transmission signal, and the transmission signal with a large bandwidth will increase the complexity of the radar system. Sampling and post data transfer and processing bring pressure. In order to overcome the difficulty brought by the large bandwidth, researchers have proposed many super-resolution imaging algorithms based on single radar observations to achieve super-resolution imaging. Therefore, more research is focused on multi-band radar imaging, and high-resolution imaging with large bandwidth is equivalently realized by fusing multi-band information. Tradit...

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Application Information

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IPC IPC(8): G01S7/02
CPCG01S13/90G01S7/2883
Inventor 王彦平孙进平田继华蒋成龙洪文张冰尘
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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