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A hybrid TOA-fingerprinting based localization of mobile nodes using UWB signaling for Non-line-of-sight conditions.

Kabir MH, Kohno R - Sensors (Basel) (2012)

Bottom Line: However, the Non-line-of-sight (NLOS) error mitigation has considerable importance in localization of wireless nodes.In order to mitigate NLOS errors in indoor localization this paper proposes and investigates a novel approach which creates a hybrid combination of channel impulse response (CIR)-based fingerprinting (FP) positioning and an iterative Time of Arrival (TOA) real time positioning method using Ultra Wideband (UWB) signaling.The simulation results confirm that the proposed hybrid method yields better positioning accuracies and is much more robust in NLOS error mitigation than TOA only and FP only and a conventional iterative positioning method.

View Article: PubMed Central - PubMed

Affiliation: Division of Physics, Electrical and Computer Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya, Yokohama 240-8501, Japan. kabir@kohnolab.dnj.ynu.ac.jp

ABSTRACT
Recently, Impulse Radio Ultra Wideband (IR-UWB) signaling has become popular for providing precise location accuracy for mobile and wireless sensor node localization in the indoor environment due to its large bandwidth and high time resolution while providing ultra-high transmission capacity. However, the Non-line-of-sight (NLOS) error mitigation has considerable importance in localization of wireless nodes. In order to mitigate NLOS errors in indoor localization this paper proposes and investigates a novel approach which creates a hybrid combination of channel impulse response (CIR)-based fingerprinting (FP) positioning and an iterative Time of Arrival (TOA) real time positioning method using Ultra Wideband (UWB) signaling. Besides, to reduce the calculation complexities in FP method, this paper also introduces a unique idea for the arrangement of reference nodes (or tags) to create a fingerprinting database. The simulation results confirm that the proposed hybrid method yields better positioning accuracies and is much more robust in NLOS error mitigation than TOA only and FP only and a conventional iterative positioning method.

No MeSH data available.


Related in: MedlinePlus

Comparison on positioning accuracies for TOA only, FP only, conventional iterative TOA and hybrid methods in NLOS conditions.
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f11-sensors-12-11187: Comparison on positioning accuracies for TOA only, FP only, conventional iterative TOA and hybrid methods in NLOS conditions.

Mentions: Figure 11 shows that the proposed hybrid method has better positioning accuracies by mitigating NLOS error than TOA only, FP only and a conventional iterative method under different NLOS conditions. In a conventional iterative TOA method, we also applied the Levenberg-Marquardt iteration algorithm; however, initial values are random guesses unlike considering the positioning results of the FP method. Similarly, the proposed method also renders better positioning accuracies than the Gauss-Newton based iterative-TOA positioning method, reported in [19].


A hybrid TOA-fingerprinting based localization of mobile nodes using UWB signaling for Non-line-of-sight conditions.

Kabir MH, Kohno R - Sensors (Basel) (2012)

Comparison on positioning accuracies for TOA only, FP only, conventional iterative TOA and hybrid methods in NLOS conditions.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3472879&req=5

f11-sensors-12-11187: Comparison on positioning accuracies for TOA only, FP only, conventional iterative TOA and hybrid methods in NLOS conditions.
Mentions: Figure 11 shows that the proposed hybrid method has better positioning accuracies by mitigating NLOS error than TOA only, FP only and a conventional iterative method under different NLOS conditions. In a conventional iterative TOA method, we also applied the Levenberg-Marquardt iteration algorithm; however, initial values are random guesses unlike considering the positioning results of the FP method. Similarly, the proposed method also renders better positioning accuracies than the Gauss-Newton based iterative-TOA positioning method, reported in [19].

Bottom Line: However, the Non-line-of-sight (NLOS) error mitigation has considerable importance in localization of wireless nodes.In order to mitigate NLOS errors in indoor localization this paper proposes and investigates a novel approach which creates a hybrid combination of channel impulse response (CIR)-based fingerprinting (FP) positioning and an iterative Time of Arrival (TOA) real time positioning method using Ultra Wideband (UWB) signaling.The simulation results confirm that the proposed hybrid method yields better positioning accuracies and is much more robust in NLOS error mitigation than TOA only and FP only and a conventional iterative positioning method.

View Article: PubMed Central - PubMed

Affiliation: Division of Physics, Electrical and Computer Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya, Yokohama 240-8501, Japan. kabir@kohnolab.dnj.ynu.ac.jp

ABSTRACT
Recently, Impulse Radio Ultra Wideband (IR-UWB) signaling has become popular for providing precise location accuracy for mobile and wireless sensor node localization in the indoor environment due to its large bandwidth and high time resolution while providing ultra-high transmission capacity. However, the Non-line-of-sight (NLOS) error mitigation has considerable importance in localization of wireless nodes. In order to mitigate NLOS errors in indoor localization this paper proposes and investigates a novel approach which creates a hybrid combination of channel impulse response (CIR)-based fingerprinting (FP) positioning and an iterative Time of Arrival (TOA) real time positioning method using Ultra Wideband (UWB) signaling. Besides, to reduce the calculation complexities in FP method, this paper also introduces a unique idea for the arrangement of reference nodes (or tags) to create a fingerprinting database. The simulation results confirm that the proposed hybrid method yields better positioning accuracies and is much more robust in NLOS error mitigation than TOA only and FP only and a conventional iterative positioning method.

No MeSH data available.


Related in: MedlinePlus