A positioning method based on multi-point monitoring to eliminate nlos error

Abstract

The invention discloses an NLOS error elimination positioning method based on multipoint monitoring. The NLOS error elimination positioning method comprises the following steps that all monitoring nodes are grouped according to the rule that k nodes are in one group, and the grouped monitoring nodes are permutated and combined; any k-1 monitoring nodes in each monitoring node combination are taken at will to estimate the coordinates of target stations and calculate geometric dilution of precision; the coordinates of k estimated target stations in each monitoring node combination and the calculated geometric dilution of precision are compared in a pairwise mode, and monitoring node combinations are screened; variance calculation is conducted on the coordinates of the k estimated target stations to obtain weights, and the weights are accumulated to all the nodes in the current monitoring node combination; all the nodes are sorted according to the weights, and the k nodes with the largest weights are taken for calculating a positioning result, wherein k is a constant. According to the NLOS error elimination positioning method, the positioning results of different combinations of a plurality of nodes are used for weakening the influence on a final positioning result.

Description

technical field [0001] The invention relates to a positioning method for eliminating NLOS errors, in particular to a positioning method for eliminating NLOS errors based on multi-point monitoring, and belongs to the technical field of wireless communication. Background technique [0002] At present, with the explosive growth of radio services at this stage, the air spectrum environment has become more and more complex, and the regulation of radio spectrum has become extremely challenging. In the complex and changeable spectrum environment, the regulation of the radio spectrum environment has become particularly important for both government and civilian use. Not only to store and analyze the received signal, but also to estimate the location of the signal transmitting station. The positioning technology used in radio frequency spectrum regulation can be called passive positioning technology. [0003] Among the traditional positioning technologies, the TDOA (Time Difference...

AI Technical Summary

Problems solved by technology

If the target station transmits instantaneous signals, it is difficult to eliminate the influence of NLOS on the final positioning results by calculating time statistics

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