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Combined interference method and system based on spectrum sensing and modulation identification

A spectrum sensing and modulation identification technology, applied in the field of joint interference methods and systems, can solve the problems of inability to interfere with cognitive communication system link formation, interference signal users unable to implement effective interference, etc., and achieve the effect of effective anti-interference strategy

Inactive Publication Date: 2015-12-23
ZHEJIANG UNIVIEW TECH CO LTD
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Problems solved by technology

[0004] What the present invention aims to solve is that the existing methods of sending interference signals to idle frequency bands cannot effectively interfere with established link users, and the way of modulation identification cannot interfere with the formation of links in cognitive communication systems. Joint interference method and system based on spectrum sensing and modulation identification

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  • Combined interference method and system based on spectrum sensing and modulation identification
  • Combined interference method and system based on spectrum sensing and modulation identification
  • Combined interference method and system based on spectrum sensing and modulation identification

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Embodiment Construction

[0035] A joint jamming method based on spectrum sensing and modulation recognition, such as figure 1 shown, including the following steps:

[0036] (1) The radio frequency receiving antenna receives the full frequency band signal, and the radio frequency receiver divides the full frequency band to be detected into several fixed bandwidth sub-bands F1, F2, F3, . . . , Fg. Since the direction of the signal source is not known in advance, the RF receiving antenna uses an omnidirectional antenna. The frequency range of the whole frequency band is 3M to 30M in the shortwave frequency band, and the bandwidth of the sub-band is 3M, so the whole frequency band is divided into 9 bands with a bandwidth of 3M. sub-band.

[0037] (2) The control center receives the signals of each sub-band segment by segment by changing the frequency of the DDS (Direct Digital Frequency Synthesizer) of the radio frequency receiver, and moves the signal to zero frequency through frequency conversion, and ...

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Abstract

The present invention discloses a combined interference method and system based on spectrum sensing and modulation identification, which combines cognitive radio spectrum sensing with modulation identification, and is applied to interference communication. Interference sensing is carried out for establishing an external link, and communication interference is also carried out on an external communication link that has been linked. Link information is transmitted for our cognitive communication system while interfering, thereby realizing an effective anti-interference strategy for us.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a joint interference method and system based on spectrum sensing and modulation identification. Background technique [0002] With the development of wireless communication technology, the number of wireless communication devices is increasing day by day, and the requirements for data transmission rate are also getting higher and higher, and the wireless communication rate can even reach hundreds of megabytes per second. However, the spectrum resources that people can use are limited, and they are also facing the problem of scarcity of spectrum resources while making breakthroughs in wireless communication technology. In many licensed frequency bands, most of the time is idle, that is, there are many "spectrum holes". How to use these "spectrum holes" has become a hot research issue today. As a more intelligent spectrum detection and sharing technology, cognitive ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04K3/00H04B17/382
Inventor 肖海林黄国庆颜晓娟王茹莫秋椿闫坤
Owner ZHEJIANG UNIVIEW TECH CO LTD
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