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This paper introduces a real-time localization system (RTLS) using efficient multiple propagation models to compensate for the drawback of the received signal strength technique. The RTLS is implemented on an active RFID system and uses received signal strength measurements and reference tags for ranging. The RTLS is implemented purely in software that post processes the received signal strength data...
This paper describes indoors radio frequency (RF) localization using radio signal strength indication (RSSI) which is available in wireless communications networks. The main advantage of described methodology is taking as localization hardware the communications sub-system and developing dedicated software in order to obtain a location of mobile network nodes using trilateration algorithm. Accuracy...
This paper describes effects of different frequencies on RSSI measurements and proposes how to increase distance measurement accuracy by using these effects as a new method. RSSI values depend on communication frequency and distance between receiver and transmitter. Electromagnetic signals' free space path loss value is related with their frequency. By using different frequencies, distinct RSSI values...
Recently, the Global Positioning System (GPS) has been adapted for use in many applications. However, the system suffers from blind spots where its electronic waves are unable at present, to penetrate such as the inside of buildings, underground garages, and tunnels. Consequently, further research to solve this problem is of some importance. This article suggests that, position-detection technology...
For the problems of traditional RSSI localization inaccurate and modeling difficult in WSN, this paper puts forward a support vector regression (SVR) learning algorithm based on RSSI and LQI. By training the samples with RSSI and LQI values as input while coordinates as output, we get the localization model. It differs from other RF-based algorithm in that it can estimate node locations directly according...
Distance estimation by the evaluation of RSSI measurements is an easy method to predict the position of an unknown node. Therefore common and proven systems can be used for the infrastructure. For indoor environments the distance-pending path loss is affected by strong variations, especially appearing as frequency specific signal dropouts. A diversity concept with redundant data transmission in different...
Real-time position localization of moving objects in an indoor environment is an encouraging technology for realizing the vision of creating numerous novel location-aware services and applications in various market segments. Increasing the accuracy of these location tracking systems will increase their usefulness. An off the shelf development platform that uses radio signal strength indication (RSSI)...
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