Combined modeling and evaluating method for spatial frequency domain resource of cognitive system

A cognitive system, space-frequency technology, applied in the transmission system, transmission monitoring, network planning, etc., can solve problems such as the limitations of the research environment

Inactive Publication Date: 2012-07-04
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has the following deficiencies when evaluating wireless resources when using airspace resources: (1) The limitations of the research environment, that is, the existing research is done in a scenario with infrastructure

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  • Combined modeling and evaluating method for spatial frequency domain resource of cognitive system
  • Combined modeling and evaluating method for spatial frequency domain resource of cognitive system
  • Combined modeling and evaluating method for spatial frequency domain resource of cognitive system

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Embodiment Construction

[0033] Referring to the above drawings, consider the scenario where the authorization system and the cognitive system are jointly covered, such as figure 1shown. The authorization system includes an authorization transmitter and a plurality of authorization receivers. For simplicity, the cognitive system consists of a cognitive transmitter and a cognitive receiver, that is, there is no competition and interference between cognitive receivers. The number of licensed transmitter antennas is The number of licensed receiver antennas is Number of Cognitive Transmitter Antennas The number of cognitive receiver antennas is

[0034] The specific implementation manner of the present invention will be described in further detail.

[0035] Step 1: Perform spectrum sensing and construct a frequency resource vector.

[0036] The cognitive receiver uses an energy detection algorithm to detect the signal emitted by the authorized base station transmitter, and sends the detection d...

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Abstract

The invention discloses a combined modeling and evaluating method for a spatial frequency domain resource of a cognitive system. The combined modeling and evaluating method for the spatial frequency domain resource of the cognitive system comprises the following steps of: firstly, performing singular value decomposition on acquired cognitive communication and channel matrix information that the cognitive communication interferes with an authorized user; secondly, establishing middle matrixes, and performing orthonormalization on the middle matrixes respectively; thirdly, computing spatial correlation between the cognitive communication and the interference at a cognitive transmitting end and a cognitive receiving end respectively; comprehensively considering a characteristic mode transmission gain of the cognitive communication, and evaluating the quality of the spatial domain resource; and on the basis, performing combined modeling and quality evaluation on the spatial frequency domain resource. On the basis of integrating the spatial correlation and the characteristic mode transmission gain, a wireless resource is modeled and evaluated, so that the wireless resource can be described more accurately, the cognitive system can reasonably select the wireless resource, the utilization ratio of the resource of the system is improved, and the communication performance of the cognitive system is improved.

Description

technical field [0001] The present invention belongs to the field of communication technology, and relates to joint resource modeling and resource quality assessment of frequency domain and air domain, that is, integrated spectrum use status information in frequency domain and spatial correlation and spatial mode in air domain (also called characteristic mode, Eigenmode) Joint resource modeling and evaluation based on transmission gain is helpful for the cognitive system to make a reasonable selection of wireless resources, and is used for wireless resource evaluation and management in the common coverage area of ​​the authorization system and the cognitive system. Background technique [0002] With the development of cognitive radio (Cognitive radio, CR), dynamic spectrum sharing technology has received more and more attention. Traditional cognitive radio only considers the frequency domain, that is, one-dimensional cognition and resource management. When the authorized use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/14H04B17/00H04B17/391
Inventor 李钊刘瑞雪刘勤李建东刘明骞马英红王琳
Owner XIDIAN UNIV
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