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Radio frequency identification technologies are popular since their cost is very low and its data transmission based upon radio-wave communications. Where, the objects that are attached to tags are located using the reference tags. However, RSSI information suffers from the multipath propagation and anisotropic interference. So, the localization accuracy will be affected severely. Also, the multipath-propagation...
In this paper, a new indoor location algorithm using RFID is proposed in order to improve the positioning accuracy. The new algorithm is based on VIRE. This new algorithm introduces the concept of assit virtual reference tags to generate a more accurate estimate, and makes each virtual tag own a more appropriate threshold. It is shown that the new algorithm improve the positioning accuracy compared...
Most of the traditional indoor location algorithms based on the distance loss model always filter the received signal strength, and then we can use the distance loss model to infer the distance between the nodes and achieve location eventually. The accuracy of the traditional indoor location algorithm is very unstable due to multipath propagation effects and complex signal attenuation law in the indoor...
The objective of this study is the assessment of the accuracy of the operation of three indoor localization platforms based on wireless short range technologies: platform of UWB-based localization, platform of RFID-based localization and domotic platform based on BUSing protocol.
In this paper, a visualization management systems are designed based on RFID technology and Java EE web technology. This system includes hardware design and software design. The parts of hardware design could get the position of the tracking equipment with the RFID automatic identification technology which is used to achieve real-time collection of data so as to realize real-time, tracking and monitoring...
In recent years, the expanding of wireless technologies have applied to indoor location. However, the results of indoor location are not accurate because of the signal instability caused by the multi-path, diffraction and scattering phenomena; In addition, the wireless signal is susceptible to environmental factors inference, such as wall, humidity and dust. In this paper, firstly, we use Kalman Filter...
To estimate the localization of RFID tag in an open room, we use AOA method instead of RSSI. In this paper, we take an advantage of the certain angle coverage of UHF RFID, and design a set to make UHF RFID reader whirl around an axis to scan each tag that can be found with the constant angular rate, so that the locations of tags are obtained by the two sets according to their time-of-difference and...
Location Identification Based on Dynamic Active Radio Frequency Identification (RFID) Calibration (LANDMARC) is a typical system for indoor location using active RFID technology, where k-nearest algorithm is applied including 4 RFID readers and 16 reference tags. In this paper, we propose an efficient algorithm so-called Prior Measurement Error-correcting (PME) based on stationary readers for indoor...
This paper aims to locate a tag position inside the building by using low cost device with minimal location error. The enhancement approach with received signal strength indication (RSSI) technique is proposed to achieve the target. In this paper, after introducing the existing LANDMARC system, we try to construct the relationship between RSSI and distance from reader to tag by experiment. Finally,...
This paper analyzed the relationship between the nearest neighbour algorithm and the topology of reference tags used in LANDMARC, and proposed an optimal arrangement of reference tags. Simulation results showed that the new topology can provide better performance than the old one used in LANDMARC.
This paper deals with the problem of personal location and guidance in indoor and outdoor environments. The authors analyze different technologies which can be applied to this task. The goal is providing the user with the most accurate and reliable technology depending on the user profile and environment. Indoor location technologies are analyzed and compared from different points of view, highlighting...
RFID technologies are getting more attention for its good performance in many application domains. Indoor location based on active RFID technologies provides an approach with a high performance to price ratio, which further expands the application domain. This paper proposes a new algorithm, which is based on analysis of LANDMARC algorithm and the general Bayesian-based algorithm. Our algorithm is...
This paper introduces a new method for estimating location of radio frequency identification (RFID) tags for application in indoor environments. The proposed positioning scheme employs a time-difference of arrival (TDOA) range estimation algorithm. The time-difference measurement is performed by taking advantage of the de-ramp properties of a linear frequency modulation (LFM) chirp. The paper provides...
Omówiono zagadnienie dotyczące lokalizacji terminali wewnątrz budynków. Krótko przedstawiono zjawiska zachodzące w kanale radiowym oraz scharakteryzowano profile opóźniania mocy, jakie występują w takim środowisku. Opisano techniki lokalizacji terminali, jakie mogą zostać zastosowane w tym specyficznym środowisku propagacyjnym oraz możliwości praktycznej realizacji systemów lokalizacji we wnętrzach...
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