A three-dimensional spectrum sensing method for heterogeneous spectrum network based on unmanned aerial vehicle
A spectrum sensing and network three-dimensional technology, applied in the field of wireless communication, can solve the problems of occupying channels, not using heterogeneous spectrum three-dimensional spectrum opportunities, and not helping secondary users to efficiently mine and occupy spectrum holes, so as to improve spectrum sensing detection performance and the effect of spectrum utilization
Active Publication Date: 2018-12-25
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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[0004] However, studies on cognitive radio all focus on temporal or spatial spectrum sensing in 1D or 2D spectrum space and assume that all secondary users share the same opportunity to occupy the channel, while there are no reports on 3D spectrum opportunity utilization of heterogeneous spectrum
Temporal or spatial spectrum sensing in 1D or 2D spectrum space does not help secondary users efficiently mine and occupy spectrum holes in a 3D heterogeneous spectrum environment
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[0078] In order to make the object and effect of the present invention clearer, the specific implementation manner of the method of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0079] A cognitive radio network is structured as figure 1 As shown, the TV tower is located in the center of the hemisphere and N drones are randomly distributed in the hemisphere area, obeying the three-dimensional Poisson distribution. The entire network space is divided into three layers of black, gray and white, with a radius of R p The PU transmission range (primary user transmission range) is called the black layer, which indicates the furthest distance that the primary user signal can be received. White layer radius R s , which is called the perceived range of the PU (the perceived range of the primary user). any in R s Drones outside the range cannot detect the main user signal. The gray layer acts as a transition layer with a rad...
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The invention discloses a three-dimensional spectrum sensing method of heterogeneous spectrum network based on an unmanned aerial vehicle, belonging to the technical field of wireless communication. Firstly, the three-dimensional spectrum access opportunity is defined, and the three-dimensional space-time opportunity sensing model is established. The space-time false alarm probability and space-time detection probability of a single UAV and the whole network are defined as the evaluation criteria of detection performance. Then, a three-dimensional space-time sensing framework based on UAV is designed and applied to spectrum sensing in heterogeneous spectrum environment. Then the basic 3D space-time sensing algorithm is improved and three improved space-time fusion algorithms are proposed.Finally, the UAV transmit power is controlled by the perception-based power control algorithm. The invention utilizes the position flexibility of the unmanned aerial vehicle to propose a three-dimensional spectrum sensing algorithm of the heterogeneous spectrum network, which can effectively help secondary users to efficiently mine and occupy spectrum holes under the three-dimensional heterogeneous spectrum environment.
Description
technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method for performing three-dimensional spectrum sensing in a heterogeneous spectrum network based on an unmanned aerial vehicle (UAV). Background technique [0002] In recent years, with the explosive growth of wireless devices and services, the contradiction between the increasingly crowded spectrum and the underutilization of spectrum resources has become increasingly prominent. Some unlicensed frequency bands, such as industrial, scientific, medical bands and licensed bands for land mobile communications, are too crowded. However, most of the licensed frequency bands allocated to broadcast television or military radar are often used inefficiently. [0003] Therefore, if the system can automatically sense the spectrum environment, adjust or adjust the transmission parameters in real time through intelligent learning, and occupy the idle frequency band license...
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Login to View More IPC IPC(8): H04B17/382H04B17/391
CPCH04B17/382H04B17/391
Inventor 王正沈锋吴启晖戚楠
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS