S1 Wireless Team Report Wireless Telecom Lab Samsung Research Center, Moscow May, 2004. - презентация

1 S1 Wireless Team Report Wireless Telecom Lab Samsung Research Center, Moscow May, 2004

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3 Projects 2003 Local Positioning System, (January – December) Results: - LPS system concept - LPS devices prototype - LPS algorithms prototype 2004 Embedded Local Positioning System (E-LPS), (March – October) Based on results of LPS, 2003 Projects 2003 Local Positioning System, (January – December) Results: - LPS system concept - LPS devices prototype - LPS algorithms prototype 2004 Embedded Local Positioning System (E-LPS), (March – October) Based on results of LPS, 2003 Projects

4 LPS System Architecture

5 LPS, Testing Results The System Coverage Maximum distance from tag to BS - up to 35 meters indoor Maximum distance from beacon to BS - up to 35 meters indoor Maximum distance from beacon to BS - up to 35 meters indoor Service area with 40 meters x 40 meters covered by 5 BSs Service area with 40 meters x 40 meters covered by 5 BSs Positioning Accuracy Multi-path indoor interference is strongly impact on position accuracy Average positioning accuracy is about 6 – 7 meters Average positioning accuracy is about 6 – 7 meters Positioning accuracy is not enough Positioning accuracy is not enough Wireless Communication Wireless communications between BSs and LPS Server b Maximum distance from BS to BS – up to 35 meters indoor Maximum distance from BS to BS – up to 35 meters indoor LPS Devices Base Station Prototype based on PC and Evaluation Boards Tag and Beacon size and power consumption is rather big Tag and Beacon size and power consumption is rather big

6 The goal of the project is to develop embedded low-cost low-size Local Positioning System (LPS), which allows indoor locating of mobile objects The E-LPS Project based on LPS, 2003 Project results Current project must solve two main problems: - to reduce size and costs of LPS device - to improve accuracy of tag positioning Main issues: passive hyperbolic navigation - passive hyperbolic navigation - using beacons - WLAN b connections between BS and LPS server - frequency band – 2.4 GHz ISM - FCC compliance - positioning accuracy – about 2.0 meters E-LPS Project Goal

7 LPS Algorithms

8 Accuracy of Positioning Required accuracy of positioning – 2.0 meters Current accuracy - about 5-7 meters Reason – multi-path indoor interference Accuracy Improvements is Required Single Path 2 paths 4 paths EarlyLate Delayed signal Direct signal Delayed signals Direct signal Delayed signals Direct signal

9 Algorithmic Approaches Spectrum Analysis Approach Covariance Shape Approach LMS Approach