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Estimation and improvement for reliability and accuracy of position hunting method by means of radio chaining les factor

A wireless link, Rice's technology, used in radio wave measurement systems, direction finders using radio waves, satellite radio beacon positioning systems, etc., to solve problems such as incorrect finding, incorrect pseudorange, extra cost, etc.

Inactive Publication Date: 2005-12-14
INTEL MOBILE COMM GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] This problem is generally not so important in wireless communication, because the useful information contained in the received signal is usually recovered from the delayed signal, while for position finding systems, the necessary information is contained in the signal between different signal sources. If the time between signals is medium, the reflected and delayed signal will travel a longer distance, and the result is that the position finding receiver will detect a false range that is larger than the line-of-sight range, and an incorrect false range will cause the incorrect one to be found. Location
This method can only be done with a substantial loss of accuracy when deciding on new unknown positions, which, among other things, means that this position calculation must be performed before making decisions about incorrect pseudo-regions, thus causing significant additional cost

Method used

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  • Estimation and improvement for reliability and accuracy of position hunting method by means of radio chaining les factor
  • Estimation and improvement for reliability and accuracy of position hunting method by means of radio chaining les factor
  • Estimation and improvement for reliability and accuracy of position hunting method by means of radio chaining les factor

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Embodiment Construction

[0037] As is known, the sum waveform of a Gaussian-distributed noise signal corresponding to two orthogonal signals has a Rayleigh distribution, so the Rayleigh distribution is used in order to describe the statistical properties of the received multi-path signal waveform suffering from fading. If x and y are independent Gaussian random variables with mean zero and a shared variable σ 2 , then P R ( r = x 2 + y 2 ) will have a Rayleigh distribution. Figure 1A Shown is a Rayleigh distribution signal waveform, which is a function of time, and Figure 1B Shown is the Rayleigh distribution function (probability density function, pfd), which is obtained by:

[0038] P R ( r ) = r ...

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Abstract

In order to improve the reliability and accuracy of a position finding method of a GPS method, the quality of a wireless link for the position finding method is determined by evaluating a parameter, in particular the Rice factor of the amplitude distribution density, which is represented by The ratio of the signal strength transmitted over a line-of-sight path to the signal strength transmitted over a non-line-of-sight path.

Description

technical field [0001] The invention relates to a method for determining the quality of a radio link according to the preamble of claim 1 . The invention also relates to a method for finding the position of a mobile station by means of a radio link between the mobile station and at least one reference station, wherein the reliability of the position finding is improved by taking into account the quality of the radio link as a result of the decision sex and accuracy. Background technique [0002] It is known in the prior art that position finding can be performed on the basis of wireless links, for example within the satellite-assisted GPS (Global Positioning System) system. The European Galileo satellite navigation system and positioning methods based on terrestrial wireless sources also provide such applications. Such location-finding methods, and appropriate applications, allow a user to determine his location by means of distance measurements to some specific wireless s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S1/00G01S3/06H04B17/00
CPCG01S3/06G01S19/22G01S19/23G01S19/42G01S19/428
Inventor A·施米德A·纽鲍尔
Owner INTEL MOBILE COMM GMBH
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