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Cognitive radio system capable of realizing spectrum sensing without quiet period

A cognitive radio and spectrum sensing technology, applied in the field of cognitive radio systems, can solve the problems of reducing the data transmission time of CR users, impairing the communication service quality of CR users, and destroying the continuity of data transmission.

Inactive Publication Date: 2011-03-02
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0003] In the current cognitive radio network, such as IEEE802.22 wireless area network, in order to suppress the interference of cognitive radio signals to spectrum sensing, the existing spectrum sensing technology needs to use a silent period, during which CR users interrupt their own data This not only reduces the time for CR users to transmit their own data, but also destroys the continuity of data transmission and seriously damages the communication service quality (QoS, Quality of Service) of CR users.

Method used

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  • Cognitive radio system capable of realizing spectrum sensing without quiet period
  • Cognitive radio system capable of realizing spectrum sensing without quiet period
  • Cognitive radio system capable of realizing spectrum sensing without quiet period

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Embodiment Construction

[0056] In order to make the objectives, technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0057]The topology of the cognitive radio system in the embodiment of the present invention is as follows: figure 1 As shown, a pair of CR user equipment includes a CR transmitting device and a CR receiving device, and a pair of authorized user equipment includes an authorized transmitting device and an authorized receiving device. The authorized user equipment uses the allocated authorized spectrum resources, which are available channels, and the CR user equipment uses the authorized spectrum resources when the authorized user equipment is not working. However, the authorized user equipment may start to work at any time. Cognitive user equipment needs to quickly and accurately detect authorized user signals that appear on this segment of spe...

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Abstract

The invention provides a cognitive radio system capable of realizing spectrum sensing without a quiet period, which is applied to cognitive radio networks. The system comprises a cognitive radio transmitting set and a cognitive radio receiving set, wherein the cognitive radio transmitting set is used for transmitting information by using chaotic signals; and the cognitive radio receiving set is used for simultaneously carrying out spectrum sensing and chaotic signal demodulation on the received signals. By using the system, a cognitive radio user does not need to use the quiet period when spectrum sensing is carried out, thereby increasing the time for the cognitive radio user to carry out data transmission, ensuring the continuity of data transmission and enhancing the communication QoS (Quality of Service) of the cognitive wireless user.

Description

technical field [0001] The invention belongs to the field of wireless communication, and particularly relates to a cognitive radio system. Background technique [0002] With the development of wireless communication technology, people's demand for wireless spectrum resources is increasing. However, wireless spectrum is a scarce, limited resource. How to make full use of spectrum resources and improve spectrum utilization has become an urgent problem to be solved. Cognitive radio (CR, Cognitive radio) technology provides a feasible solution to this problem. In the CR system, users with cognitive functions (CR users) need to sense the spectrum of authorized users, and use spectrum holes that have been allocated to authorized users but not affect the normal communication of authorized users. Free spectrum that is not used by it. [0003] In the current cognitive radio network, such as IEEE802.22 wireless area network, in order to suppress the interference of cognitive radio...

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Application Information

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IPC IPC(8): H04B1/02H04B1/06H04B17/00H04B17/382
Inventor 郭彩丽魏冬曾志民冯春燕刘芳芳
Owner BEIJING UNIV OF POSTS & TELECOMM
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