Methodical leaky feeder design for indoor positioning considering multipath environments

Engelbrecht, Julia; Collmann, Ralf; Birkel, Ulrich; Weber, Mark

doi:10.1109/rws.2010.5434146

Cited by 10 publications

(9 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore the non-periodic LCX prototype was made of different periodic LCX-sections linked together resulting in a cascaded attenuation profile [2], [9], [12] to improve location accuracy. Thus the established dimensioning process for periodic LCX sections could be used section-wise [13].…”

Section: A Radiating Cable: Standard and Prototypementioning

confidence: 99%

Radiating cable for indoor localization using UMTS

Birkel

Weber

Collmann

2012

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

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: A Radiating Cable: Standard and Prototypementioning

confidence: 99%

Radiating cable for indoor localization using UMTS

Birkel

Weber

Collmann

2012

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

Self Cite

View full text Add to dashboard Cite

show abstract

“…For example, [4] demonstrated an LF based indoor positioning system. Authors of [5] show how the LF has a unique advantage for their Wireless Indoor Positioning System (WIPoS).…”

Section: Introductionmentioning

confidence: 99%

Optimization of Leaky Feeder Slot Spacing for Better Beam Forming in Mines and Tunnels

Hassan¹,

Farjow²,

Fernando³

2016

IJCNS

View full text Add to dashboard Cite

The radiating cable (or leaky feeder) is the leading solution for distributed broadband wireless access in underground mines and tunnels. The traditional radiating cable has equally spaced slots along its axis radiating evenly. However, with the new requirement for tracking and localization of miners, this paper shows how to modify the leaky feeder to function as a beam forming antenna array by appropriately optimizing the slot spacing. Optimizing the leaky feeder slot distances using Genetic algorithm has a good impact on the channel parameters, making it an excellent choice for leaky feeder antennas. Linear, as well as bent practical leaky feeder shapes, were considered, and we tested five different optimization algorithms and compared side lobe energies, varying the slot distance which had an impact on side lobe level. Also, we derived the expression for the BER, spectral efficiency and throughput considering a time-varying wireless channel. We observed that as the radius of curvature of the feeder increased (approaching a straight line), the spectral efficiency decreased as expected. Interestingly different optimization algorithms perform differently at different carrier frequencies. An optimization method should be chosen according to the required goal to be achieved (maintaining uniform equal power along the cable, or a more directed beam, or using a certain frequency of operation).

show abstract

“…To our knowledge, only [7] has used Leaky Feeders for Indoor Positioning; however, no other work is known with regard to use Leaky Feeders for Localization using Chirp Spread Spectrum Technologies.…”

Section: Introductionmentioning

confidence: 99%

On the possibility to use leaky feeders for positioning in chirp spread spectrum technologies

Moschevikin

Serezhina

Sikora

2014

2014 2nd International Symposium on Wireless Systems Within the Conferences on Intelligent Data Acquisition and Advanced Comput

View full text Add to dashboard Cite

Real Time Localization Systems using electromagnetic waves have significantly evolved during the last years. They also might be used in industrial and in mining environments. Here, topologies might include tunnels, where it might be difficult to ensure the field coverage. Leaky feeder cables are a common solution in case of normal radio communication.In this paper, we study the possibilities to use leaky feeders also for Time-of-Flight based real time localization in such linear topologies, like tunnels, but possibly also for 2Dlocalization. Theoretical analysis is verified with real-life measurements, which were performed using Chirp Spread Spectrum Technologies.

show abstract

Methodical leaky feeder design for indoor positioning considering multipath environments

Cited by 10 publications

References 6 publications

Radiating cable for indoor localization using UMTS

Radiating cable for indoor localization using UMTS

Optimization of Leaky Feeder Slot Spacing for Better Beam Forming in Mines and Tunnels

On the possibility to use leaky feeders for positioning in chirp spread spectrum technologies

Contact Info

Product

Resources

About