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Cognition spectrum sensing device and method on basis of DVB-T (Digital Video Broadcasting-Terrestrial) frequency band

A terrestrial digital TV and radio frequency band technology, applied in the field of communication, can solve problems such as the scarcity of spectrum resources, achieve the effects of less distortion, save power consumption, and improve system integration

Active Publication Date: 2015-06-03
GUILIN UNIV OF ELECTRONIC TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, under the traditional fixed spectrum allocation scheme that allocates dedicated frequency bands for different wireless communication systems, spectrum resources, which are important bearers of wireless and mobile communications, are becoming increasingly scarce.

Method used

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  • Cognition spectrum sensing device and method on basis of DVB-T (Digital Video Broadcasting-Terrestrial) frequency band
  • Cognition spectrum sensing device and method on basis of DVB-T (Digital Video Broadcasting-Terrestrial) frequency band
  • Cognition spectrum sensing device and method on basis of DVB-T (Digital Video Broadcasting-Terrestrial) frequency band

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Embodiment Construction

[0042] A cognitive spectrum sensing device based on terrestrial digital TV broadcast frequency band, such as figure 1 As shown, it is mainly composed of scanning channel, transmitting channel and host computer. The scanning channel includes a radio frequency receiving antenna, a radio frequency receiving module and a first baseband processing module. The radio frequency receiving antenna is connected to the input terminal of the radio frequency receiving module, and the output terminal of the radio frequency receiving module is connected to the input terminal of the first baseband processing module. The radio frequency receiving module and the first baseband processing module are respectively connected with the upper computer. The transmitting channel includes a radio frequency transmitting antenna, a radio frequency transmitting module and a second baseband processing module. The output end of the second baseband processing module is connected to the input end of the radio ...

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Abstract

The invention discloses a cognition spectrum sensing device and a cognition spectrum sensing method on the basis of a DVB-T (Digital Video Broadcasting-Terrestrial) frequency band. The cognition spectrum sensing device mainly comprises a scanning channel and a transmitting channel; the scanning channel is mainly used for carrying out spectrum sensing under the stepped frequency of 8Mhz on the DVB-T frequency band, analyzing the radio frequency environment and judging existence and appearance of an authorization user (i.e. a DVB-T user); and the transmitting channel is used for carrying out transmission on cognitive user data by utilizing an idle frequency band sensed by a spectrum. According to the invention, two self-adaptive dynamic spectrum switching modes are adopted and a user can control an upper computer to select the reasonable spectrum switching mode according to the requirements of a communication system, so that a result can be analyzed, parameters can be regulated, an avoidance strategy can be adopted and unbearable influence cannot be caused on the authorization user on the DVB-T frequency band.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a cognitive spectrum sensing device and method based on terrestrial digital television broadcasting (DVB-T) frequency band. Background technique [0002] With the rapid development and application of wireless communication, the problem of scarce spectrum resources is becoming more and more serious. However, under the traditional fixed spectrum allocation scheme that allocates dedicated frequency bands for different wireless communication systems, spectrum resources, which are important bearers of wireless and mobile communications, are becoming increasingly scarce. In order to change the traditional way of spectrum resources and make full use of idle spectrum resources in time domain and space domain, cognitive radio technology has been proposed. [0003] Spectrum sensing technology is one of the key technologies of cognitive radio. It can enable the transmitt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B17/382H04B1/04H04B1/10
Inventor 肖海林韩霄濮锦胜王丽元闫坤
Owner GUILIN UNIV OF ELECTRONIC TECH
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