Synthetic aperture broadband signal source reconnaissance imaging method based on dual-channel joint processing
A joint processing and synthetic aperture technology, which is applied in the direction of radio wave reflection/re-radiation, utilization of re-radiation, measurement devices, etc., can solve problems such as large amount of data and unknown parameters
Pending Publication Date: 2020-05-05
XIDIAN UNIV
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[0004]
Generally, when doing signal reconnaissance, the signal source is a non-cooperative signal and the parameters are unknown. In order to obtain the complete information of the signal source, the sampling rate of the signal is generally high, and the data is collected in the form of a synthetic aperture, which requires continuous sampling in a short period of time. In this case, the amount of data is huge, which will put a lot of pressure on the data transmission between observation platforms
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[0043] The present invention will be described in further detail below in conjunction with specific examples, but the embodiments of the present invention are not limited thereto.
[0044] See figure 1 , figure 1 It is a schematic diagram of the steps of a synthetic aperture broadband signal source reconnaissance imaging method based on dual-channel joint processing provided by an embodiment of the present invention, including:
[0045] acquiring a first radar signal and a second radar signal;
[0046] performing a carrier frequency removal operation on the first radar signal and the second radar signal to obtain a carrier frequency removed first radar signal and a carrier frequency removed second radar signal;
[0047] Performing distance dimension compression on the first radar signal after carrier frequency removal and the second radar signal after carrier frequency removal to obtain a first distance dimension compressed signal and a second distance dimension compressed s...
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The invention belongs to the field of radar signal processing, and particularly relates to a synthetic aperture broadband signal source reconnaissance imaging method based on dual-channel joint processing. The method comprises the following steps: acquiring a first radar signal and a second radar signal; performing carrier frequency removal operation on the first radar signal and the second radarsignal to obtain a first radar signal after carrier frequency removal and a second radar signal after carrier frequency removal; performing distance dimension compression on the first radar signal after carrier frequency removal and the second radar signal after carrier frequency removal to obtain a first distance dimension compression signal and a second distance dimension compression signal; respectively carrying out azimuth dimension compression operation on the first distance dimension compression signal and the second distance dimension compression signal to obtain a first compression signal and a second compression signal; and performing time difference estimation operation and frequency difference estimation operation on the first compressed signal and the second compressed signal to obtain time difference and frequency difference. According to the method, the data transmission amount between platforms is small, and the method has the single-channel processing capacity and alsohas the double-channel combined processing precision.
Description
technical field [0001] The invention belongs to the field of radar signal processing, and in particular relates to a synthetic aperture broadband signal source reconnaissance imaging method based on dual-channel joint processing. Background technique [0002] Reconnaissance positioning can be divided into passive reconnaissance positioning and active reconnaissance positioning according to whether the reconnaissance aircraft emits signals. Compared with active positioning, passive positioning does not emit signals, that is, it does not reveal its own position, and overcomes the disadvantage that active positioning is easy to expose the target. As long as it receives the electromagnetic signal emitted by the target, it measures and processes the signal to obtain Its position and parameter information are calculated to obtain the motion trajectory, so passive positioning has the characteristics of stealth performance and wide range of action. With the rapid development of ele...
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Login to View More IPC IPC(8): G01S13/90G01S7/02
CPCG01S7/02
Inventor 孙光才陈博伟王裕旗邢孟道杨军
Owner XIDIAN UNIV