A multi-dimensional spectrum sensing method for multi-master users based on random sets
A spectrum sensing, primary user technology, applied in transmission monitoring, electrical components, transmission systems, etc., can solve problems such as the inability to sense other status information requirements of primary users, and achieve reliable and effective detection results, strong anti-interference ability, and easy engineering. effect achieved
Inactive Publication Date: 2017-09-22
UNIV OF SCI & TECH BEIJING
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[0004] In order to solve the problem that the existing spectrum sensing technology can only detect the number of primary users in the detection area, but cannot meet the requirements for sensing other state information of primary users, the present invention provides a multi-dimensional spectrum sensing method based on random sets for multiple primary users. Compared with the traditional sensing method, the method provided by the present invention can not only accurately track and detect the number of active primary users, but also track and detect information such as the specific location, frequency of use, and signal receiving angle of the primary user
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[0042] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.
[0043] Such as figure 1 This is a flowchart of a random set-based multi-master user multi-dimensional spectrum sensing method according to an embodiment of the present invention, such as figure 1 As shown in the method, the method includes the steps:
[0044] S1: Assuming that the main users are evenly distributed in the detection area S, given the dynamic equations and sensor measurement equations followed by each main user's movement. In this step, the following target motion equation and observation equation are used to describe the motion of the main user and the measurement behavior of the sensor:
[0045]
[0046] z k =h k (x k ,υ k ) (2)
[0047] Among them, formula (1) is the equation of motion, formula (2) is the observation equati...
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The invention provides a multi-dimensional spectrum sensing method for multi-master users based on a random set, which belongs to the technical field of wireless communication and is used to solve the problem that the existing spectrum sensing technology cannot meet the requirements for sensing other status information of master users. The method provided by the present invention is: given the dynamic equation followed by each main user movement and the measurement equation of the sensor; obtaining the state value and observed value of each main user movement at each moment; The set and the set of observation values are respectively used as the state random set variable and observation random set variable of the multi-master user at this moment, and the state transition density function and likelihood function of the multi-master user are calculated; the particle probability hypothesis density filtering method is used to analyze the The number of primary users and the status information of primary users are detected. In the above scheme, the random set-based particle probability hypothesis density filtering method can be used to detect information such as the number of primary users, the location of primary users, the frequency of use, and the angle of signal reception.
Description
Technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a multi-master user multi-dimensional spectrum sensing method based on random sets. Background technique [0002] Wireless communication technology uses electromagnetic waves to carry and transmit information to realize the data transmission process. With the rapid development of wireless communication services, the fundamental problem of wireless communication technology-the shortage of wireless spectrum resources has become more and more prominent, and the main reason is that it is low. Spectrum utilization. In order to solve this problem, as the contradiction between the existing fixed spectrum allocation policy and the demand for spectrum resources has intensified, cognitive radio technology has emerged. The basic starting point of cognitive radio technology is that under the premise of not affecting normal communication in the authorized frequency band, wi...
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IPC IPC(8): H04B17/382
Inventor 杜利平
Owner UNIV OF SCI & TECH BEIJING