Indoor RF Fingerprinting using leaky feeder cable considering environmental changes

Weber, Mark; Birkel, Ulrich; Collmann, Ralf

doi:10.1145/1710035.1710053

Cited by 9 publications

(13 citation statements)

References 8 publications

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“…Similar results were obtained in tests performed for WLAN networks [3]. Even though the RSS is more stable using LeakyFeeder cables, significant signal variations occur due to fast fading and eventual presence of obstacles.…”

Section: ) Optimalsupporting

confidence: 82%

“…Besides the coverage advantages in tunnels and long halls, Leaky-Feeders allow for wider available Line-of-Sight (LoS) conditions and therefore localization accuracy is likely to be less sensitive to environmental changes [3].…”

Section: Background and Related Workmentioning

confidence: 99%

“…Among indoor location techniques, those based in the Received Signal Strength (RSS) are of particular interest since they require neither the installation of extra infra-structure hardware nor allocation of extra spectrum [2] [3]. This is particularly important for the case of an accelerator tunnel where the risk of hardware damage due to radiation or interference with pre-existing components is high.…”

Section: Introductionmentioning

confidence: 99%

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Evaluating location fingerprinting methods for underground GSM networks deployed over Leaky Feeder

Pereira

Moreira

Ricardo

2011

2011 International Conference on Indoor Positioning and Indoor Navigation

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Abstract-Accurate localization techniques have long been of major importance for safety systems and a lot of research has been conducted in the distributed computing field regarding its functionality and reliability. In the specific scenario of long yet narrow tunnels existing at CERN, localization methods will enable a number of applications and processes to substantially reduce human intervention.In this paper we evaluate the use of Fingerprinting techniques with GSM signal available throughout the LHC tunnel via a radiating cable and compare some methods to estimate the location. The existing GSM infrastructure and tunnel conditions seem to be favorable to the adoption of these Fingerprinting methods. Nevertheless significant variations in the signal have been observed which might be traced back to different operational states of accelerator equipment. These effects and their sources will be analyzed in more detail in order to improve the applied techniques and their accuracy under such challenging conditions.

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Section: ) Optimalsupporting

confidence: 82%

Section: Background and Related Workmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Evaluating location fingerprinting methods for underground GSM networks deployed over Leaky Feeder

Pereira

Moreira

Ricardo

2011

2011 International Conference on Indoor Positioning and Indoor Navigation

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“…Investigations had been made with two different cable types and a standard omni-directional antenna installation with WLAN-and UMTS-system-technology. If location estimation (online phase) in the presence of obstacles and people in the indoor environment is based on a calibration (offline phase) without obstacles the LCX installation [1], [10], [11] leads to more reliable results. When Fig.…”

Section: A Radiating Cable: Standard and Prototypementioning

confidence: 99%

“…Such type of cables are also beneficial for indoor localization using RF-Fingerprinting due to permanent Line of Sight (LOS) between the mobile client and the cable: In [1] it has been shown, that the calibrated radio map did not suffer as much under environmental changes within buildings due to moving obstacles or people as if standard indoor antennas were used. However due to the lower longitudinal loss of radiating cables and excessive small scale fading the absolute accuracy achieved with fingerprinting was lower compared to the omni installation in a WLAN environment.…”

Section: Introductionmentioning

confidence: 99%

Radiating cable for indoor localization using UMTS

Birkel

Weber

Collmann

2012

2012 Ubiquitous Positioning, Indoor Navigation, and Location Based Service (UPINLBS)

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A severe drawback of using RF (Radio Frequency) Fingerprinting for indoor localization is the laborious effort to calibrate the radio map. Especially in case of environmental changes recalibration becomes necessary. The approach of our research project WIPoS (Wireless Indoor Positioning System) is to solve this problem by appropriate RF engineering and optimized methods. In former publications it has been shown that using leaking feeder cables using wireless local area networks (WLAN) has an important advantage that the fingerprints are more insensitive to environmental changes than using omnidirectional antennas. This paper compares the performance of two different types of leaky feeder cables in a long hallway scenario using UMTS and WLAN as wireless system technologies. We can show that using radiating cables have some advantages versus omnidirectional antennas and that UMTS is an alternative system technology to WLAN for RF-Fingerprinting.

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Performance and limits of KNN-based positioning methods for GSM networks over leaky feeder in underground tunnels

Pereira

Theis

Moreira

et al. 2012

Journal of Location Based Services

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This article may be used for research, teaching, and private study purposes. Any substantial or systematic reproduction, redistribution, reselling, loan, sub-licensing, systematic supply, or distribution in any form to anyone is expressly forbidden. The publisher does not give any warranty express or implied or make any representation that the contents will be complete or accurate or up to date. The accuracy of any instructions, formulae, and drug doses should be independently verified with primary sources. The publisher shall not be liable for any loss, actions, claims, proceedings, demand, or costs or damages whatsoever or howsoever caused arising directly or indirectly in connection with or arising out of the use of this material.

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Indoor RF Fingerprinting using leaky feeder cable considering environmental changes

Cited by 9 publications

References 8 publications

Evaluating location fingerprinting methods for underground GSM networks deployed over Leaky Feeder

Evaluating location fingerprinting methods for underground GSM networks deployed over Leaky Feeder

Radiating cable for indoor localization using UMTS

Performance and limits of KNN-based positioning methods for GSM networks over leaky feeder in underground tunnels

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