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Time difference of arrival method and device

A technology of time difference positioning and time difference, which is applied in the field of arrival time difference positioning method and device, can solve the problems that the accuracy needs to be improved, and achieve the effect of improving the measurement accuracy

Active Publication Date: 2017-06-30
BEIJING SPREADTRUM HI TECH COMM TECH CO LTD
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Problems solved by technology

[0003] The accuracy of the existing time difference of arrival positioning method needs to be improved

Method used

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  • Time difference of arrival method and device
  • Time difference of arrival method and device

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Embodiment Construction

[0059] As mentioned above, the Observed Time Difference of Arrival (OTDOA) positioning method is a technology for positioning based on the difference in propagation time of signals from at least three base stations to the mobile terminal. The terminal measures the time difference of arrival between each neighboring cell and the reference cell to the terminal respectively. After all the neighboring cells are measured, or the specified time expires, the terminal finally reports the measurement result of the time difference of arrival to the positioning server, and the positioning server estimates the terminal The difference in distance to two different base stations, and the intersection of different hyperbolas formed by at least three base stations is the estimated terminal position. The accuracy of the existing time difference of arrival positioning method needs to be improved.

[0060] Since the existing time difference of arrival positioning method measures the positioning r...

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Abstract

The invention discloses a time difference of arrival method and device. The time difference of arrival method comprises the following steps: acquiring data from a network side by a terminal, wherein the data comprises lists of a reference cell and a neighbor cell; storing time domain data, wherein the time domain data contains corresponding positioning sub-frames of at least partial cell in the reference cell and the neighbor cell, wherein the positioning sub-frame contains a positioning reference signal; detecting the time domain data by use of multiple different time domain phases so as to obtain positioning reference signals corresponding to multiple time domain phases; computing power delay distribution of detected cell under each phase in reference to the positioning reference signals corresponding to different time domain phases; analyzing the power delay distribution so as to obtain the time difference of arrival to the terminal from the positioning reference signal of the neighbor cell compared to the positioning reference signal of the reference cell.

Description

technical field [0001] The invention relates to the communication field, in particular to a time difference of arrival positioning method and device. Background technique [0002] The Time Difference of Arrival (Observed Time Difference of Arrival, OTDOA) positioning method is a positioning technology based on the signal propagation time difference from at least three base stations to the mobile terminal. The terminal measures the time difference of arrival between each neighboring cell and the reference cell to the terminal respectively. After all the neighboring cells are measured, or the specified time expires, the terminal finally reports the measurement result of the time difference of arrival to the positioning server, and the positioning server estimates the terminal The difference in distance to two different base stations, and the intersection of different hyperbolas formed by at least three base stations is the estimated terminal position. [0003] The accuracy of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W64/00
CPCH04W64/006Y02D30/70
Inventor 袁航剑张帆李俊强
Owner BEIJING SPREADTRUM HI TECH COMM TECH CO LTD
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