Frequency spectrum sensing method based on chaos theory

A technology of spectrum sensing and chaotic signals, which is applied in the field of spectrum sensing of cognitive radio, can solve the problems of destroying the continuity of data transmission, reducing the time of data transmission of CR users, and impairing the quality of communication services of CR users, so as to improve the utilization rate of spectrum , Ensure continuity, improve timeliness and accuracy

CN101982945AInactive Publication Date: 2011-03-02BEIJING UNIV OF POSTS & TELECOMM
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2011-03-02
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a frequency spectrum sensing method based on chaos theory, which is applicable to a cognitive radio network. The method comprises the following steps: a cognitive radio transmitting terminal user transmits self data by chaos signals and a cognitive radio receiving terminal user demodulates frequency spectrum sensing and chaos signals. Through the method provided by the invention, the cognitive radio user does not need to use the silent period when frequency spectrum sensing is carried out, so that time for the cognitive radio user to transmit self data is increased, continuity of data transmission is ensured and communication quality of service (QoS) of the cognitive radio user is improved.
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Description

technical field

[0001] The invention belongs to the field of wireless communication, in particular to a spectrum sensing method of cognitive radio. 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 perceive the spectrum of authorized users, and use spectrum holes without affecting the normal communication of authorized users. vacant spectrum 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 signals to spectrum sensing, the ex...

Examples

Embodiment

[0020] see figure 2 , the embodiment of the present invention provides a spectrum sensing method based on chaos theory, including:

[0021] Generate cognitive radio transmission information 000: CR transmitter users encode the information to be sent to convert it into binary cognitive radio transmission information;

[0022] Modulating into a chaotic signal 100: the user at the CR transmitting end modulates the information transmitted by the cognitive radio into a chaotic signal;

[0023] Receive the signal and divide the signal into two channels 200: the user at the CR receiving end receives the signal on the spectrum hole and divides it into two channels, the first signal is the signal received from any antenna on the CR receiving end , used for spectrum sensing; the second signal is three independent signals received from the three antennas on the CR user receiving end, and is used for demodulation of chaotic signals;

[0024] Assume that the authorized user signal exist...