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Anti-velocity-deception-jamming adaptive iteration estimation method

A self-adaptive iterative, speed deception technology, applied to radio wave measurement systems, instruments, etc., can solve problems such as performance damage, matched filter performance damage, and undetectable targets

Active Publication Date: 2016-12-21
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

In 2013, Zhang Jindong proposed an anti-velocity deception jamming method based on random initial phase pulse trains, see the document "New Antivelocity Deception Jamming Technique Using Pulses with Adaptive Initial Phase, IEEE Transactions on Aerospace and Electronic System, vol.49, no.2, pp.1290-1300, April 2013." However, in the article it processes the received signal using a matched filter that has high sidelobe levels and whose performance is severely damaged under strong speed-spoofing jamming
At high jamming energies, the performance of the matched filter is severely compromised and the target cannot be detected
In order to solve the problem that the target cannot be detected under high interference, the present invention proposes an adaptive iterative estimation technology for the random initial phase pulse train, which has good anti-speed deception interference performance, and can realize the detection of the target under high interference energy. detection and estimation of

Method used

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Embodiment Construction

[0027] After initialization, we can continue to iterate until the convergence condition is met, and get the Doppler estimate of the target and In particular, at the mth iteration, we need to use the m-1th Doppler estimate and to calculate and Therefore, the sub-loop iterative algorithm is possible.

[0028] input: s T , s J 、y

[0029] Output: Doppler estimate of the target Doppler Estimation of Interference

[0030] Step 1: Initialize Doppler Estimates of Target and Interference

[0031] Step 1-1: Get discrete s T , s J 、y

[0032] Assuming that the monostatic Doppler radar transmits a pulse train containing N pulses, and different pulses contain different random initial phases, the transmitted pulse signal of the nth pulse can be expressed as

[0033] s n ( t ) = e jφ n ...

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Abstract

The invention discloses an anti-velocity-deception-jamming adaptive iteration estimation method, relates to the technical field of radar anti-jamming and especially relates to the radar anti-jamming adaptive iteration estimation technology. According to the method, radar emission signals, jamming signals and reception signals are utilized as prior information; for each Doppler unit, latest iterative estimation target and jamming Doppler spectrum are utilized to design optimal linear filters for the target and jamming respectively to enable the output power of each Doppler unit to be minimum, and to achieve an effect that the algorithm can identify the target and jamming simultaneously, and the target can be identified and estimated effectively under high interfering energy.

Description

technical field [0001] The invention relates to the technical field of radar anti-jamming, in particular to radar anti-jamming adaptive iterative estimation technology. Background technique [0002] Pulse Doppler radar has high distance resolution and speed resolution, strong ability to suppress clutter, and can distinguish the echo of moving targets in a strong clutter background, so it is a very important strategy in the current electronic warfare status. The traditional acceptance processing method of pulse Doppler radar is to distinguish targets and jammers through correlation processing. The spoofing jammer composed of digital radio frequency memory (DRFM) can generate a variety of spoofing jamming with flexible, multi-style and strong resistance by scaling, delaying, modulating and forwarding the radar signal. Due to the strong coherence between spoofing interference and radar transmission signals, false targets are easily formed at the radar receiving end, which mak...

Claims

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Application Information

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IPC IPC(8): G01S7/36G01S7/41
CPCG01S7/36G01S7/41
Inventor 崔国龙姬红敏卢金伟盛彪孔令讲张天贤易伟杨晓波
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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