Compressed Spectrum Sensing Method Based on Location Information in Heterogeneous Wireless Sensor Networks
A technology of compressed spectrum sensing and wireless sensor network, which is applied in wireless communication, transmission monitoring, transmission system and other directions, and can solve problems such as difficulty in data processing of central control nodes.
Inactive Publication Date: 2015-10-21
NANJING UNIV OF POSTS & TELECOMM
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[0007] First, according to the characteristics of the heterogeneous wireless sensor network and the purpose of spectrum sensing, the spectrum sensing system model in the heterogeneous wireless sensor network is established; then considering that there are a large number of sensor nodes in the heterogeneous wireless sensor network, the central control node For the problem of difficult data processing, a local information processing method based on clustering is proposed; finally, based on the compressed sensing theory, a multi-dimensional information acquisition method for authorized users in heterogeneous wireless sensor networks is proposed
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[0015] The compressed spectrum sensing method based on positioning information in the heterogeneous wireless sensor network of the present invention includes the following contents:
[0016] ① System model: system model such as figure 1 As shown, assuming that there are N in the heterogeneous wireless sensor network r Wireless sensor nodes are randomly deployed in an area of R×C size to work, and the position of each sensor node is known, located at point (a i ,b i ), i∈{1,2,...,N r}. N is randomly distributed in this area p authorized users, location unknown. To discretize the model, assume that each authorized user is located at point (x r ,y c ), x r ∈{0,Δx,...,(R-1)Δx},y c ∈{0,Δy,...,(C-1)Δy}, Δx, Δy are the unit lengths of the x-axis and y-axis, respectively. The wideband spectrum within this region is partitioned into N ch adjacent and non-overlapping narrowband channels, assuming that the center frequency is Each authorized user can communicate using any ...
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The invention discloses a locating information based compressed spectrum sensing method for a heterogeneous wireless sensor network. The locating information based compressed spectrum sensing method includes firstly, building a spectrum sensing system model according to characteristics of the heterogeneous wireless sensor network; secondly, executing a clustering process to effectively reduce calculation quantity of a center control node so as to solve the problem of excessive data volume of the center control node; thirdly, according to the compressed sensing theory, restoring compressed data of each single wireless sensing node jointly, thereby acquiring multi-dimensional spectrum information of the current authorized user. According to the compressed sensing technology and the clustering technology fully, the effective method for spectrum detecting and authorized user locating is applicable to the heterogeneous wireless sensor network, and multi-dimensional spectrum information, including location, sending power and service frequency band and the like, of the authorized user in the current electromagnetic environment is acquired accurately and rapidly on the condition of low compression ratio.
Description
technical field [0001] Aiming at the problem that a heterogeneous wireless sensor network (HWSN: Heterogeneous Wireless Sensor Network) with a large number of wireless sensor nodes needs to quickly sense the current spectrum state, the present invention proposes a low-complexity compressed spectrum sensing method based on positioning information , belonging to the technical field of dynamic spectrum sensing. Background technique [0002] A wireless sensor network is a multi-hop self-organizing network formed by a large number of cheap micro-sensor nodes deployed in the monitoring area through wireless communication to cooperatively perceive, collect, process, and transmit the information of the perceived objects in the geographical area covered by the network. . In a heterogeneous wireless sensor network, there are networks composed of many different types of sensor nodes, and the use of spectrum resources in a wider frequency band is complex and changeable in its environme...
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IPC IPC(8): H04B17/382H04W84/18H04B17/309
Inventor 齐丽娜范瑞春张凯李红
Owner NANJING UNIV OF POSTS & TELECOMM