Wireless positioning multi-algorithm enhancing method based on information fuse

A wireless positioning and multi-algorithm technology, applied in the field of wireless communication, can solve problems such as poor accuracy and low positioning accuracy, and achieve the effect of improving accuracy

Inactive Publication Date: 2009-11-18
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that, aiming at the shortcomings of the prior art that adopts a single positioning method that the positioning accuracy is not high, and the positioning estimation accuracy of the mobile station MS is poor, the present invention proposes a wireless positioning technology based on information fusion to improve the positioning accuracy of the MS. Estimated Accuracy
Then send them to the first layer of data fusion and the second layer of data fusion

Method used

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  • Wireless positioning multi-algorithm enhancing method based on information fuse
  • Wireless positioning multi-algorithm enhancing method based on information fuse
  • Wireless positioning multi-algorithm enhancing method based on information fuse

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Embodiment Construction

[0008] 1. TDOA multi-algorithm fusion model

[0009] In order to combine the advantages of Chan algorithm and Taylor sequence expansion method and improve the accuracy of MS location estimation, a location algorithm model is established, and the results of Chan and Taylor sequence expansion methods are used for signal data fusion.

[0010] Such as figure 1 Shown is a schematic diagram of the TDOA multi-algorithm fusion positioning system model. The system model sends the TDOA measurement value collected by the base station to the data calculation unit, and uses Chan algorithm and Taylor sequence expansion method to estimate TDOA respectively, and the estimated value is sent to the first layer. Data fusion and second-level data fusion, after two-level data fusion, four positioning estimation values ​​are generated, namely, the first-level data fusion result, the second-level data fusion result, the TDOA(Chan) algorithm estimation result, and the TDOA(Taylor) Algorithm estimati...

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Abstract

The invention requests protection of a wireless positioning method based on information fusion, which relates to the wireless positioning technology of mobile terminals. The present invention is realized through the following technical solutions, the base station measures the TDOA value and the AOA value of the mobile terminal, uses the Chan algorithm and the Taylor algorithm to estimate the TDOA value respectively, and combines the AOA value to obtain TDOA (Chan), TDOA (Taylor), TDOA (Chan) / AOA, TDOA(Taylor) / AOA four positioning estimates are respectively sent to the first layer data fusion and the second layer data fusion for processing, the results of the two layer data fusion and TDOA(Chan), TDOA(Taylor) The estimated value is sent to the fourth layer of data fusion to calculate the weighting coefficient, and the best positioning result is selected as the mobile terminal position according to the weighting coefficient. Adopting the positioning method of the present invention is beneficial to improving the accuracy of positioning estimation of the mobile station under the condition that there is no prior information of the channel environment.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to the wireless positioning technology of a mobile terminal. technical background [0002] In the 3G cellular mobile communication system, more and more network services depend on the location information of the mobile station (MS). Therefore, the wireless location technology based on the cellular network to estimate the location of the MS has attracted extensive attention in recent years. Now several network-based positioning methods, such as field strength positioning method, radio wave time of arrival (TOA) positioning method, time difference of arrival (TDOA) positioning method and angle of arrival (AOA) positioning method, can be applied to the position estimation of mobile users. . However, in different channels and network environments, the performance of these basic positioning technologies is different, and there is no one technology that can sho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/02H04B7/26H04W64/00
Inventor 张毅罗元李锐曾黔蜀郑太雄李学勤谢颖徐洋
Owner CHONGQING UNIV OF POSTS & TELECOMM
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