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Methods and systems for location estimation

A mobile device and base station technology, applied in the field of location estimation, can solve the problems of weak incoming call signal or signal source, reduced performance, and reduced location judgment accuracy and performance of mobile devices.

Inactive Publication Date: 2006-11-01
MEDIATEK INC
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Problems solved by technology

For example, in a network-based system, the number of base stations set up in rural (Rural) areas is relatively small, resulting in weak incoming call signals or insufficient signal sources
Therefore, in rural areas, network-based methods (such as TDOA and AOA) will reduce the accuracy and performance of mobile device location judgment
On the other hand, the main problem with satellite-based methods (such as GPS) is that when the satellite signal is severely blocked in the urban valley (Urban Valley) area, its effectiveness will be greatly reduced

Method used

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  • Methods and systems for location estimation
  • Methods and systems for location estimation
  • Methods and systems for location estimation

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Embodiment Construction

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail in conjunction with the attached figures.

[0024] image 3 A position estimation system according to an embodiment of the present invention is shown. The system combines signals from the GPS system and the mobile phone network.

[0025] The position estimation system includes a mobile station (MS) 310, such as a mobile phone, a smart phone, and a personal digital assistant (PDA), a plurality of base stations (BS) (321, 322, and 323), and a plurality of satellites ( 331 and 332). Mobile station 310 is equipped with a GPS receiver (not shown). In addition, each base station has a forward link (Forward-Link) pilot (Pilot) channel, which can continuously broadcast its pilot signal in the mobile phone network to provide timing (Timing) and phase (Phase) information to mobile stop 310. Each base st...

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Abstract

A position estimation method and system. The mobile station receives signals from multiple satellites and multiple base stations. performing TOA (time of arrival) measurements based on signals from a plurality of satellites; estimating a first position using a spreading method based on said time of arrival measurements; performing TDOA (time difference of arrival) measurements based on signals from a plurality of base stations; based on The TDOA measurement uses the unfolding method to estimate a second location; and combines the first location and the second location to estimate the location of the mobile device.

Description

technical field [0001] The present invention relates to location estimation methods and systems, and more particularly to a method and system for estimating a mobile station based on a network-based (Network-Based) and a satellite-based (Satellite-Based) signal Method and system for location. Background technique [0002] In recent years, the development of wireless positioning technology has attracted the attention and attention of related fields. Different types of location-based services (Location-Based Service, LBS) have been proposed, including emergency 911 (E-911) subscriber security services, location-based billing services, navigation systems, and intelligent transportation systems (ITS ) applications, etc. However, in order to meet the needs of all applications, it is necessary to provide more accurate location estimation for mobile devices such as mobile phones, smart phones and personal digital assistants under different environments. [0003] Currently, vario...

Claims

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Application Information

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IPC IPC(8): G01S19/46G01S5/14G01S19/09
CPCG01S5/06G01S5/10G01S5/12G01S19/46G01S19/48
Inventor 陈昭霖方凯田
Owner MEDIATEK INC
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