High-speed target multichannel compensation focusing and TBD mixed accumulation detection method
A technology of mixed accumulation and detection methods, applied in the research field of radar signal and data processing, can solve the problems of reducing the amount of calculation, low detection ability of hypersonic stealth maneuvering targets, etc., to reduce the amount of calculation, improve the detection probability and real-time, low The effect of minimum detectable signal-to-noise ratio
Active Publication Date: 2015-12-16
NAVAL AVIATION UNIV
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[0005] The problem to be solved by the present invention is to provide a multi-channel compensation focusing and TBD hybrid accumulation detection method for high-speed targets, aiming at the low detection ability of existing radars for hypersonic stealth maneuvering targets. Focusing processing of distance walking compensation and phase compensation for wave signals, coherent accumulation of actual signals, TBD processing through each channel during the scanning cycle of the radar, to achieve non-coherent accumulation along the target trajectory, and through two stages Interaction among them to reduce the amount of calculation, achieve target detection through multi-channel selection method, and improve the continuous and rapid detection of hypersonic stealth targets by radar
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[0057] The invention will be described in further detail below with reference to the accompanying drawings
[0058] Refer to attached figure 2 , the concrete steps of the present invention are as follows:
[0059] Step 1: The radar is in the search mode, and the echo data in the radar range gate is pulse-compressed first, and then multi-channel compensation and coherent accumulation are carried out by using the speed, acceleration and other parameters as parameters. specific
[0060] For the pulse compressed echo signal at a larger speed interval d v In the interval [-V max ,V max ](V max For the maximum possible speed of the target), perform segmented multi-channel parallel compensation and accumulation processing, and then perform a larger acceleration search interval d in each speed segment channel a in [-a max ,a max ](a max For the maximum possible acceleration of the target), the segmented multi-channel parallel compensation and accumulation process is carried ...
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Directing at the problem that ability of an existing radar in discovering a hypersonic-speed invisible maneuvering target is low, the invention provides a high-speed target multi-channel compensation focusing and TBD mixed accumulation detection method. Focusing treatment of distance walk compensation and phase compensation and coherent accumulation of reality signals are performed on a hypersonic-speed target echo signal through multiple channels concurrently, and TBD treatment is performed through multiple speed channels during a scanning period of a radar, non-coherent accumulation along a target movement trajectory is realized, the calculation amount is reduced through information interaction between two stages, detection of a target is realized through a method of optimal selection of multiple channels, and continuous and rapid detection of a hypersonic-speed invisible target by the radar is improved. Compared with a traditional coherent accumulation method, the method provided by the invention has a lower minimum detection signal to noise ratio, and reducing the calculation amount, size of memory and complexity through information interaction between coherent accumulation and non-coherent accumulation, thereby facilitating engineering realization.
Description
technical field [0001] The invention belongs to the research field of radar signal and data processing, and is suitable for solving the problem of continuous and rapid detection and tracking of hypersonic stealth targets such as hypersonic aircraft, ballistic missiles and space debris in adjacent space. Background technique [0002] New high-threat targets such as hypersonic vehicles, ballistic missiles, and space debris in near space have the characteristics of fast speed, good maneuverability, and strong stealth, making the detection environment of modern radars extremely harsh. Discover outstanding problems such as low target capability and discontinuous track. [0003] Affected by factors such as shock wave plasma and stealth materials, hypersonic stealth maneuvering targets will exhibit certain stealth characteristics. For the detection of stealth targets, commonly used signal processing methods include pulse compression and coherent accumulation. Pulse compression is ...
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Login to View More IPC IPC(8): G01S7/41
CPCG01S7/41
Inventor 吴巍王国宏于洪波姜辉
Owner NAVAL AVIATION UNIV