A Low-cost Fingerprint Positioning System in

A Low-cost Fingerprint Positioning System in - A

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: A Low-costFingerprintPositioningSystem in Cellular Networks ClaudeTakenga Instituteofcommunicationsengineering LeibnizUniversityofHannover Appelstrasse9A,30167Hannover,Germany takenga@yahoo.fr Abstract- An ultimateaim ofmobilepositioningresearchis to find a method providing high estimation accuracy to the user within minimum delay and at minimum cost. Conventional location techniques based on trilateration and triangulationrelyonline-of-sightpathbetweenthebasestation antennaandthemobileunit.Indenselybuilturbanareas,this assumption israrely valid. This fact degrades the location performanceoftheconventionaltechniquesand motivatesthe need fordevelopment ofmore accurate technique suitedfor these areas. Positioning system developed in thisresearch is dividedintothreesub-systems.The firstsub-systemsolvesthe problemsrelatedtofingerprintlocalizationandinvolvesneural networkaskeyelementofthepositioningalgorithm.The post- processingtaskswhichincludetrackingandmap-matchingare performedinthesecondandthirdsub-systemsrespectively. Keywords- FingerprintPositioning,MobileLocalization, KalmanFilter,Map-Matching,NeuralNetworks. I. INTRODUCTION Mobilelocalizationtechniqueshavebeenunderstrong development during the last years. There is a broad agreement that localization will play a central role in enablingvalue-addedservicesinthe new generationcellular networks and thatthese services requirehigh accuracy at lowcost.TheGlobalPositioningSystem(GPS)isapopular solution for providing location in terrestrial wireless communication networks. GPS isaproven technologyand provides high accuracy when a line-of-sight (LOS) path exists between the receiver and at least four satellites. However, GPS isofteninoperableinareas where satellites areblocked,suchasinbuildingsandbuilt-upurbanareas. Much of the activities in the area of wireless positioninghavebeendrivenbythe1996Reportandorder of the Federal Communications Commission (FCC) [1]. Since then,differentpositioningsystems working within a cellularnetworkhavebeendeveloped[2-4].Parametersthat are often measured and used forlocationincludereceived signal strength (RSS), angle-of-arrival (AoA), time-of- arrival(ToA)andtimedifferencesofarrival(TDoA). Directionfindingandrangingmethodsperformwellin environment characterised with LOS. Indense urban area, additionalalgorithmsshouldbeaddedwhichdealwithnon- line-of-sight (NLOS). Moreover, these methods require additionalequipmentfortheirimplementations (directional antennas at every base station (BS) for AoA and very accurateclockforrangingmethods). KyandoghereKyamakya DepartmentofSmartSystemTechnologies AlpenAdriaUniversityKlagenfurt Klagenfurt,Austria Kyandoghere.kyamakya@uni-klu.ac.at Fingerprint localization methods perform relatively betterinurbanareacomparedtoothermethods. Moreover, thisapproachdoesnotrequireanyadditionalequipmentfor itsimplementationtotheexistingcellularnetworks....
View Full Document

This note was uploaded on 10/01/2010 for the course ELEC 6111 taught by Professor Brown during the Spring '10 term at E. Illinois.

Page1 / 6

A Low-cost Fingerprint Positioning System in - A

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online