Filtering method of receiving signal strength of mobile terminal

A received signal strength, mobile terminal technology, applied in radio wave measurement systems, re-radiation, transmission systems, etc., can solve problems such as poor filtering effect of large fading, improve adaptability, meet filtering requirements, and achieve accurate Effects of estimation and filtering

Active Publication Date: 2019-01-01
ZHONGBEI UNIV
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  • Claims
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Problems solved by technology

Particle filter estimates the current position through existing data, but it is not effective for occasional large fading filtering

Method used

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  • Filtering method of receiving signal strength of mobile terminal
  • Filtering method of receiving signal strength of mobile terminal
  • Filtering method of receiving signal strength of mobile terminal

Examples

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Embodiment Construction

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0025] Such as figure 1 As shown, a method for filtering the received signal strength of a mobile terminal, the specific steps are described in detail as follows:

[0026] Step 101 sequentially acquires N RSSI values ​​r of the mobile terminal in chronological order i , wherein i=1...N, N is taken as 64 in the embodiment of the present invention, let R=[r 1 ,r 2 ...r 64 ];

[0027] Step 102 adopts M fitting functions of variable i to construct a matrix X ...

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Abstract

The invention relates to the technical field of positioning algorithms for mobile terminals and more particularly, provides a filtering method of the receiving signal strength of a mobile terminal. With effective utilization of the location continuity of the mobile terminal, curve fitting is carried out on the RSSI of the mobile terminal by using existing data, thereby realizing precise estimationand filtering of the RSSI. The adaptability of the filtering method is improved by combining the weighting coefficient, so that the filtering requirements of the mobile terminal in different motion states are met.

Description

technical field [0001] The present invention relates to the technical field of positioning algorithms for mobile terminals, and more specifically, to a method for filtering received signal strengths of mobile terminals. Background technique [0002] In many mobile terminal positioning systems, the positioning algorithm based on Received Signal Strength Indication (RSSI) is widely used due to its fast positioning speed, simple acquisition of RSSI, and no need for additional hardware devices. [0003] In the actual environment, the measured value of RSSI is affected by the multipath effect, obstacle occlusion and Doppler effect, which shows fast fading with rapid fluctuations. The fast fading phenomenon of RSSI leads to the low accuracy of the positioning algorithm based on RSSI. Therefore, it is necessary to The RSSI measurement value is filtered to improve the accuracy of the positioning algorithm. [0004] Currently known RSSI filtering methods include mean filtering, recu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S11/06H04B17/318
CPCH04B17/318G01S11/06Y02D30/70
Inventor 戴文舒鲍凯凯孙兴丽聂鹏飞葛利华
Owner ZHONGBEI UNIV
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