Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 42 for “"RSSI"”.
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Accurate On-Body Distance Estimation using BLE RSSI and IMU Sensor Fusion
… use of BLE Received Signal Strength Indicator (RSSI) for robust, short-range distance estimation on the human body remains a challenging area, primarily due to signal instability caused by multipath fading and body shadowing. This thesis presents a novel framework that fuses BLE RSSI with …
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Indoor Location Tracking and Orientation Estimation Using a Particle Filter, INS, and RSSI
… of using received signal strength indication (RSSI) in conjunction with an inertial navigation system (INS) to provide location estimations without the use of GPS in a Particle Filter with a small development microcontroller and base station. The paper goes over the topics used in this thesis …
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Improving Bluetooth-based Indoor Positioning Using Vision and Artificial Networks
… to the Received Signal Strength Indicator (RSSI) fluctuations caused by human body shadowing. This thesis presents methods to compensate for losses in the RSSI values by applying ANN algorithms to RSSI measurements from three BLE advertising channels. The resulting improved RSSI values are …
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Locating Unmanned Aerial Vehicles (UAVs)
… and Received Signal Strength Indication (RSSI). Long Range Wide Area Network (LoRaWAN) protocol is utilized in the system. Initial results have shown that RSSI is the most accurate among the three methods and also has a minimal cost. Therefore, RSSI was used to estimate the distance …
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Towards low-cost context awareness on smart shelving using passive UHF RFID infrastructure
… volume on the shelf could be related to tag RSSI level changes for five different tested products. In addition, material classification could be achieved by tag RSSI attenuations. Tests are done between three classes (metal, glass, and plastic), with three objects each class. In the …
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Design of a System to Monitor Youth Workers' Heat Stress and Positioning using Non-invasive Techniques
… the Received Signal Strength Indication (RSSI) is used to approximate the distance between devices. With accuracy comparable to GPS methods and no necessity for line of sight to sky, RSSI supplies a more than adequate estimate for proximity distance. The temperature and RSSI values are …
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Collaborative wireless local area network
… with the received signal strength indicator (RSSI). It then solely uses the RSSI as a decision metric for selecting an AP to connect to as this is the only information available at the MN. We argue that a MN is not the correct entity in WLAN for making the choice of an AP when many APs are …
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Intruder localization wireless sensor network radar design with virtual reference tags
… techniques in WSN, ToA (Time of Arrival) and RSSI (Received Signal Strength Indicator). In ToA the difference between arrivals of signal is estimated and based on this information position of target is calculated. This technique produces better results but in real time the cost of nodes used …
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Application of Wireless Signal Scanning in Traffic Studies
… of received signal strength indicator (RSSI) of wireless signals transmitted by personal smart devices. Wi-Fi, Bluetooth Classic and Bluetooth Low Energy are three widespread signal modes, transmitted by popular beacons used in daily life. A comparative study of the field performance of …
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Design of a Control System for Multiple Autonomous Ground Vehicles to Achieve a Self Deployable Security Perimeter
… on the Received Signal Strength Indication (RSSI) measurement between broadcast and receive nodes to calculate distance and using the data transfer capability to allow each vehicle to develop a table of relative positions. These relative positions are used to create a potential field that …
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Changes of signal level detection in a resonant microwave cavity with varying concentrations of glucose
… of such a system. In this project, the RSSI (received signal strength indicator) measurement is used to measure the signal levels within a microwave cavity. This was taken from a one of a pair of HC-05 Bluetooth modules, one operating as a transmitter, and one operating as a receiver. …
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Návrh a realizace systému pro odposlech zpráv a měření intenzity signálu radiového modulu
… obsahu zpráv a měření intenzity signálu (RSSI) daného rádiového modulu (TR-72DA). Byla provedena volba jednotlivých komponent, vzájemných komunikačních rozhraní a jejich zapojení. K řešení byla použita vývojová prostředí Arduino IDE a MS Visual Studio, za pomoci kterých byl vytvořen řídící …
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Adding direction to a directionless world
… on directional antennas and previous work in RSSI based radio distance estimation, this work shows that using directional antennas alone, the angle between two devices can be approximated. Furthermore, this thesis shows the effect of distance estimation error on angle estimation and how the …
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Design of hybrid optio-vision tracking system with active RFID
… a few meters. A proposed design uses a simpler RSSI model suggest a dynamic positioned antenna to enhance the accuracy of simple star-shape networks. The design focuses on a double helical antenna positioned on a motorized dual axis controller.
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Communication intelligente sans fil detectant le noeud le plus proche
… nombre d'afficheurs. En utilisant la méthode RSSI (Received Signal Strength Indicator), on a pu mesurer la distance entre le nouveau dispositif proposé et les écrans. Cette approche a aidé d'identifier l'écran utilisé. L'idée de la transmission de données entre le dispositif et d'autres …
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Indoor Localisation System and Methods using Passive UHF RFID with A Mobile Platform
… based on the received signal strength indicator (RSSI) and the unwrapped phase profile. After measuring the phase and RSSI, a valid dataset can be obtained by analysing the received RSSI, the strength of which can indicate whether the signal is stable or not. The stationary point of the unwrapped …
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Computer Vision-assisted Battery-free RFID Systems for Object Recognition, Localization and Orientation
… environments. To achieve RF-Focus, novel RSSI/RF phase-distance models with additional multipath terms compared to traditional models are proposed to characterize the impact of multipath interference, and thereby a dual-reader-antenna solution is designed to deal with it. Moreover, the …
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Throughput Measurements and Empirical Prediction Models for IEEE 802.11b Wireless LAN (WLAN) Installations
… The resulting models were first developed using RSSI measurements and then confirmed using predicted signal strength parameters.
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Ultra high frequency (UHF) radio-frequency identification (RFID) for robot perception and mobile manipulation
… and receive signal strength indicator (RSSI, the strength of a tag's response). This thesis explores robot behaviors and radio frequency perception techniques using robot-mounted UHF RFID readers that enable a robot to efficiently discover, locate, and interact with UHF RFID tags applied …
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