Method, system and device for estimating TDOA

A point estimation and channel estimation technology, applied in the field of communication, can solve the problems of low TDOA accuracy and high algorithm complexity, and achieve the effect of high positioning estimation accuracy and low algorithm complexity

Inactive Publication Date: 2009-09-23
HUAWEI TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The embodiment of the present invention provides a TDOA estimation method, system and device to solve the problems of low accuracy and high algorithm complexity of the existing TDOA positioning method

Method used

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  • Method, system and device for estimating TDOA
  • Method, system and device for estimating TDOA
  • Method, system and device for estimating TDOA

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Embodiment Construction

[0027] Embodiments of the present invention are oriented to OFDM cellular communication systems or other wireless OFDM systems, and design LBS (Location Based Services, service based on positioning) training sequences for TDOA estimation and frame formats containing LBS training sequences, and propose based on the LBS training sequences The technical scheme of TDOA estimation, the method proposed in the embodiment of the present invention does not need the assistance of relevant information such as channel autocorrelation function and noise, is not sensitive to the timing error of OFDM data packet, and has high positioning estimation accuracy, and can calculate

[0028] Such as figure 2 As shown, it is a schematic diagram of cell setting in the embodiment of the present invention. Since a BS can have multiple RSs (Relay Stations) in the cell to assist reception, the embodiment of the present invention uses multiple RSs as positioning reference points.

[0029] The embodiment ...

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Abstract

The embodiment of the invention discloses a method, a system and a device for estimating time difference of arrival TDOA. The method for estimating the TDOA comprises the following steps that: time of arrival of data clustering estimated by a positioning reference point is received, and the time of arrival of the data clustering is detected at regular time by the positioning reference point according to a system precursor symbol, and is acquired by carrying out timing error estimation on an orthogonal frequency division multiplexing OFDM symbol containing a service LBS sequence based on positioning; and the TDOA is calculated according to the time of arrival of the data clustering estimated by different positioning reference points. Through the embodiment of the invention, the positioning reference point estimates the time of arrival of the data clustering, and a base station calculates the TDOA according to the time of arrival of the data clustering estimated by different positioning reference points so as to acquire specific position coordinates of a mobile station, thereby solving the problems of low accuracy and high complexity of the prior positioning algorithm.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a TDOA (Time Difference of Arrival, Time Difference of Arrival) estimation method, system and device. Background technique [0002] In the prior art, cellular wireless positioning is an extremely important terrestrial wireless positioning method. It utilizes widely distributed cellular wireless communication infrastructure to complete positioning, and does not require special user-end equipment or an additional network. The cost is extremely low for users. The basic positioning methods that provide two-dimensional positioning services for mobile stations in cellular networks include: RSS (Received Signal Strength, received signal strength) positioning, TOA (Time of Arrival, time of arrival) positioning, TDOA positioning, AOA (Angle of Arrival) positioning, and AOA (Angle of Arrival) positioning. , signal angle of arrival) positioning, etc. [0003] Cellular wirel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W64/00H04B1/707H04L27/26
Inventor 任光亮倪浩孙垂强王艳霞王光健张晓辉曾雁星梁伟光
Owner HUAWEI TECH CO LTD
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