Wireless positioning method based on set operation
A technology of wireless positioning and set operation, which is applied in the field of wireless positioning based on set operation, can solve the problems that it is difficult to guarantee the real-time performance and accuracy of wireless positioning, the complexity of positioning algorithm is high, and the complexity of calculation is increased, so as to achieve good real-time performance , high accuracy, and reduced complexity
Inactive Publication Date: 2015-04-22
华枫信通(北京)科技有限公司
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In short, the calculation process of the above two methods is relatively complicated, involving more complex operations such as square root and trigonometric operations.
Under normal circumstances, due to the jitter of the wireless signal, it is difficult to obtain the common intersection point of the three circles through the trilateration method. At this time, the maximum likelihood estimation method is required for calculation, and the computational complexity is doubled.
When there are many measured nodes in the wireless positioning system or the positioning cycle is short, the complexity of the positioning algorithm will be very high, and it is difficult to ensure the real-time performance and accuracy of wireless positioning
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[0046] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0047] A set operation-based wireless positioning method according to the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0048] The wireless positioning method based on set operation proposed by the present invention comprises the following steps:
[0049] Step 1: The access point AP listens in real time to the mobile terminal entering its signal coverage area, and sends the information of the MAR triplet [MTIP, APIP, RSSI] of the mobile terminal it collects to the access center AC;
[0050] Step 2: The position...
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A wireless positioning method based on set operation includes: through an access point AP, detecting mobile terminals within a signal coverage range thereof in real time and sending collected MAR triples [MTIP,APIP and RSSI] to an access center AC; through a positioning algorithm server, inquiring about the MAR triple information of the mobile terminals from the AC; and judging whether the number of the MAR triples is larger than or equal to 3, if so, then selecting three MAR triples with maximum signal strength to perform three-AP positioning to the mobile terminals to complete and finish positioning finally; and if not, then continuing to judge whether the number of the MAR triples is equal to 2, if so, then performing two-AP positioning to the mobile terminals to complete and end positioning finally; and if not, then ending positioning directionally. By the wireless positioning method based on set operation, algorithm complexity can be reduced, and real-time performance and accuracy of wireless positioning algorithm can be improved.
Description
technical field [0001] The invention relates to the technical field of wireless positioning, in particular to a wireless positioning method based on set operation. Background technique [0002] Commonly used wireless positioning systems generally include two types of nodes: one is nodes with known spatial coordinates, which are called anchor nodes; the other is nodes with unknown spatial coordinates, which are called measured nodes. The realization of commonly used positioning methods can generally be divided into two steps: the first step is mainly to determine the spatial distance (or angle) between the anchor node and the measured node. The commonly used ranging methods are: TOA (Time Of Arrival, Arrival time) distance measurement, TDOA (Time Differences Of Arrival, time difference of arrival) distance measurement, RSSI (Receive Signal Strength Indicator, signal indication strength) distance measurement and AOA (Angle Of Arrival, angle of arrival) angle measurement, etc. ...
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IPC IPC(8): H04W64/00
Inventor 邓光青卫民邹扬真
Owner 华枫信通(北京)科技有限公司