Multidimensional spectrum sensing method for multiple main users based on random sets
A spectrum sensing and primary user technology, which is applied in transmission monitoring, electrical components, transmission systems, etc., can solve the problem of not being able to meet other state information requirements of the sensing primary user
Inactive Publication Date: 2015-08-05
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 status information of the 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, the following will describe in detail with reference to the drawings and specific embodiments.
[0043] Such as figure 1 A flow chart of a random set-based multi-dimensional spectrum sensing method for multi-master users provided by an embodiment of the present invention, as shown in figure 1 As shown in , the method includes the steps of:
[0044] S1: Assuming that the primary users are evenly distributed in the detection area S, the dynamic equation followed by each primary user movement and the measurement equation of the sensor are given. In this step, the following target motion equation and observation equation are used to describe the movement 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 motion equation, formula (2) is the ob...
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The present invention provides a multidimensional spectrum sensing method for multiple main users based on random sets. The method belongs to the technical field of wire communication and is used for solving the problem that the conventional spectrum sensing technology cannot meet the requirement of sensing other types of state information of the main users. The method provided by the present invention comprises: giving a dynamic equation followed by each main user movement and a measurement equation of a sensor; obtaining the state value and the observed value of each main user movement of each moment; using a set of the state values and a set of the observed values of all the main user movements of each moment as a state random set variable and an observed random set variable of multiple main users at the moment and computing a state transition density function and a likelihood function of the multiple main users; and detecting the number of the main users and the state information of the main users in a detection region through the adoption of a particle probability hypothesis density filter method. In the solution, through the adoption of the particle probability hypothesis density filter method based on the random sets, the information about the number of the main users, the positions of the main users, utilization frequency, signal receiving angles and the like can be detected.
Description
technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a random set-based multi-dimensional spectrum sensing method for multi-master users. Background technique [0002] Wireless communication technology realizes the data transmission process by carrying and transmitting information through electromagnetic waves. 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 the low spectrum utilization. In order to solve this problem, under the increasingly intensified contradiction between the existing fixed spectrum allocation policy and the demand for spectrum resources, cognitive radio technology emerges as the times require. The basic starting point of cognitive radio technology is that wireless communication devices with cognitive functi...
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Inventor 杜利平
Owner UNIV OF SCI & TECH BEIJING