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OFDM-based interference signal modulation device and modulation method

A technology for interfering signals and signal modulation, applied in the field of microwave radio frequency, can solve problems such as unsatisfactory effects, and achieve the effects of convenient installation, good use value, and cost savings in coverage

Inactive Publication Date: 2021-01-15
南京新频点电子科技有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The frequency sweep jamming method mainly repeats point jamming in the entire tuning frequency band of the radar. Its disadvantage is that the spot frequency is stepping and sweeping to cover, and there are many loopholes in the frequency domain and time domain, and the effect is not satisfactory.

Method used

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  • OFDM-based interference signal modulation device and modulation method
  • OFDM-based interference signal modulation device and modulation method
  • OFDM-based interference signal modulation device and modulation method

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Embodiment 1

[0029] The present invention is a multi-beam interference signal device using OFDM modulation. The noise interference source signal is modulated onto several sub-carriers by using frequency division multiplexing technology, and an interference carrier spectrum with dense spectral lines is formed within a limited frequency range, and the frequency is up-converted. to the required frequency band to form an effective active suppression of interference and achieve the established tactical goals. This device includes two parts of detection and interference. The detection part is used to detect the airspace radio signal spectrum to determine the frequency band covered by interference; the interference part generates high-power interference radio frequency signals to interfere with the designated airspace. The main part of an interference signal modulation device using OFDM is an interference unit, which is composed of a noise source, an OFDM interference excitation component, a cohe...

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Abstract

The invention provides an OFDM-based interference signal modulation device and modulation method. The signal modulation device comprises a detection part and an interference part, and the detection part is used for detecting a spatial domain radio signal frequency spectrum so as to determine a frequency band covered by interference; the interference part generates a high-power interference radio frequency signal to carry out interference coverage on a specified airspace. According to the signal modulation device of the modulation device, a noise source baseband signal is modulated into thousands of subcarriers in an OFDM assembly, a coherent signal in an up-conversion frequency can be swept in any frequency band, radio frequency swept coverage is carried out with the bandwidth of 8MHz after conversion, the interference effect is greatly improved, and the signal modulation device has great practical value.

Description

technical field [0001] The invention belongs to the technical field of the microwave radio frequency field, and in particular relates to an OFDM-based interference signal modulation device and modulation method. Background technique [0002] Constructing a regional electromagnetic environment and shielding radio signals from interference are issues that are generally valued and studied in the industry. Under normal circumstances, the mode of spoofing and frequency band scanning to suppress interference is adopted for radar and communication interference. Sweeping to suppress interference uses interference coverage in a certain frequency domain and time domain, and generally uses VCO frequency sweeping to increase power radiation. The frequency sweep jamming method mainly repeats point jamming in the entire tuning frequency band of the radar. Its disadvantage is that the spot frequency is stepping and sweeping to cover, and there are many loopholes in the frequency domain an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26
CPCH04L27/2601H04L27/2627H04L27/2691
Inventor 廖华芬韩飞
Owner 南京新频点电子科技有限公司
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