Passive wireless positioning method based on multi-dimensional wireless imaging
A wireless positioning and wireless imaging technology
Inactive Publication Date: 2012-12-19
DALIAN UNIV OF TECH
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They proposed to use compressed sensing algorithm at the algorithm level to improve the accuracy of position estimation from a small amount of observation information as much as possible. However, the amount of observation information does not change. This method only improves the performance of the position estimation algorithm to improve the system performance. performance, limited improvement
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[0020] CC2530-based wireless scanning node 1 at frequencies 2.405GHz, 2.410GHz, 2.415GHz, 2.420GHz, 2.425GHz, 2.430GHz, 2.435GHz, 2.440GHz, 2.445GHz, 2.450GHz, 2.455GHz, 2.460GHz, 2.465GHz, 2.470GHz , 2.475GHz, 2.480GHz a total of 16 frequency channels for wireless scanning, the transmission power is 0dBm, 1dBm, 3dBm, 5dBm a total of 4 kinds of power, 8 wireless scanning nodes 1 perform multi-dimensional link scanning at the above frequency and power; 8 Wireless scanning nodes 1 are placed on four sides of a rectangular area of 8m×8m, and one wireless scanning node 1 is placed at an interval of 4m on each side. CC2530-based wireless control node 2 listens to the wireless signal information of each link, and sends the received signal strength information of each link to the general PC 3; the particle filter-based position estimation algorithm 4 takes multi-dimensional link measurement information as input , the particle position is predicted based on the random walk model, an...
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The invention belongs to the technical fields of wireless communication and wireless network techniques, and relates to a passive wireless positioning method based on multi-dimensional wireless imaging. The passive wireless positioning method is characterized by comprising the following steps of: performing wireless chain multi-dimensional scanning between wireless network nodes under the condition of a plurality of frequencies and a plurality of emitting powers to as to realize location and tracking of a mobile goal in a network coverage area on the basis of a changing condition of signal intensity received by every chain. The system is composed of a wireless scanning node, a wireless control node, a general personal computer (PC) and a position estimating algorithm. The wireless scanning node is responsible for realizing scanning of multi-frequency and multi-power wireless chain among nodes; the wireless control node is responsible for coordinating working frequency and power of the network, collecting signal intensity information of every wireless chain and sending the collected information to the PC; the position estimating algorithm on the PC can estimate a target position according to the chain intensity information. The passive wireless positioning method can realize passive wireless location and tracking without carrying any wireless equipment under the environment of fewer wireless scanning nodes.
Description
technical field [0001] The invention belongs to the application field of wireless communication and wireless network technology, and relates to a passive wireless positioning method based on multi-dimensional wireless imaging, which can realize passive positioning and tracking of a moving target in a wireless network coverage area without the need for the target to carry a wireless device . Background technique [0002] With the development of wireless communication technology and pervasive computing technology, wireless networks such as WLAN, wireless sensor network, GSM network, and 3G communication network have covered every corner of our lives. Due to the inherent characteristics of radio waves, when a target blocks a wireless link, the received signal strength information of the link will inevitably change. Based on this, when multiple wireless links exist at the same time, with the help of the received signal strength information of each wireless link, the positioning...
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IPC IPC(8): H04W4/02H04W64/00
Inventor 王洁高庆华王洪玉孙立奎吴立飞
Owner DALIAN UNIV OF TECH