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Broadband linear frequency-modulated (LFM) signal multi-decoy interference method based on fractional Fourier domain channelization

A fractional Fourier, chirp signal technology, applied in the direction of interference to communication, electrical components, etc., can solve problems such as loss of interference signals

Inactive Publication Date: 2014-01-22
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

However, the traditional Fourier domain channelization will make the energy of the wideband LFM signal overflow to multiple channels, and even lose part of the interference signal

Method used

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  • Broadband linear frequency-modulated (LFM) signal multi-decoy interference method based on fractional Fourier domain channelization
  • Broadband linear frequency-modulated (LFM) signal multi-decoy interference method based on fractional Fourier domain channelization
  • Broadband linear frequency-modulated (LFM) signal multi-decoy interference method based on fractional Fourier domain channelization

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Embodiment

[0056] Such as figure 1 As shown, the implementation flow chart of the intra-pulse multi-false target interference method based on fractional Fourier domain channelization proposed by the present invention is as follows Figure 5 As shown, its system block diagram is shown as Image 6 shown. First, according to the modulation frequency μ of the radar pulse signal x(n), the transformation order p of the channelization in the fractional Fourier domain and the counterclockwise rotation angle α of the fractional Fourier domain relative to the Fourier domain are determined, Establish a fractional-order Fourier domain channelization structure, the number of channels is K, the extraction factor is M, and a traditional low-pass filter h with a passband cutoff frequency of π / K and a transition band cutoff frequency of 2π / K is selected 0 (n) is the low-pass prototype filter of fractional-order Fourier domain channelization; secondly, determine the width N of the sampling wavegate func...

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Abstract

The invention relates to a broadband linear frequency-modulated (LFM) signal multi-decoy interference method based on fractional Fourier domain channelization, in particular to an interference method for performing multi-decoy deception on a broadband LFM signal in a pulse on the basis of fractional Fourier domain channelization, and belongs to the technical field of electronic interference. According to the broadband LFM signal multi-decoy interference method based on fractional Fourier domain channelization, all broadband LFM signals can be focused into one channel for outputting by using the energy focusing property of fractional Fourier transform on instable signals, so that the completeness of the signals is ensured, and the problems of reduction of signal energy and distortion of waveforms since the energy of the broadband LFM signals overflow into two or more channels in the conventional Fourier domain channelization are solved; meanwhile, the requirement on the instant bandwidth of a DRFM (Digital Radio Frequency Memory) system is lowered.

Description

technical field [0001] The invention relates to a multi-false-target interference method for broadband linear frequency modulation signals based on fractional-order Fourier domain channelization, a kind of interference based on fractional-order Fourier domain channelization to perform multi-false target deception on broadband linear frequency modulation signals in veins The method belongs to the technical field of electronic interference. Background technique [0002] In modern electronic warfare (EW), radar countermeasures are an important means and guarantee for military superiority. Radar countermeasures include radar reconnaissance and radar jamming, among which radar jamming is an important part of radar countermeasures. For the early radar systems, the radar waveform was relatively simple, and the operating frequency band was relatively fixed. The main interference patterns were targeting and blocking interference, as well as noise suppression interference. With the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04K3/00
Inventor 陶然赵兴浩戚士斌
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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