A5105422156- Indoor and Outdoor Localization Technologies
- Ultra-Wideband Communications Technology
- Energy Efficient Wireless Sensor Networks
- Target Tracking and Data Fusion in Sensor Networks
- Underwater Vehicles and Communication Systems
- Speech and Audio Processing
- Digital Rights Management and Security
- Advanced Authentication Protocols Security
- Green IT and Sustainability
- Cooperative Communication and Network Coding
- Microwave Imaging and Scattering Analysis
- Gene expression and cancer classification
- Wireless Communication Security Techniques
- Spatial Cognition and Navigation
- Advanced MIMO Systems Optimization
- Genetics, Bioinformatics, and Biomedical Research
- Geographic Information Systems Studies
- Older Adults Driving Studies
- Advanced Wireless Network Optimization
- Context-Aware Activity Recognition Systems
- Bioinformatics and Genomic Networks
- Wireless Body Area Networks
Qatar University
2023-2024
Nanyang Technological University
2006-2018
In wireless sensor networks, it is very important to obtain an accurate position of each node. this paper, we consider the potential Ultra Wideband (UWB) signals for positioning due its special characteristics. Accurate angle arrival (AOA) can be obtained using UWB antenna arrays. We propose a new cooperative method based on AOA's. The takes advantages pair-wise AOA's information among all nodes while existing only utilizes from anchor nodes. Then, Cramer-Rao Lower Bound (CRLB) Cooperative...
UWB signal has high ranging precision due to its large bandwidth. In this paper, TDOA ranges measured by signals are used in the position estimation process. The modeled for both LOS and NLOS environment. A error-minimizing localization method been proposed estimate locations of blind nodes performance is investigated propagations. Cramer-Rao lower bound (CRLB) on variance node positions also derived situation. Furthermore, we demonstrate that more robust range errors than Chan's
Indoor radio channels suffer multipath and non- line-of-sight (NLOS) fading, which is undesirable for accurate indoor positioning. High bandwidth of Ultra-wideband (UWB) implies high temporal resolution hence ranging accuracy. Furthermore, its robustness to fading makes UWB perfect applications. This paper analyses the theoretical bounds position estimation based on time-difference-of-arrival (TDOA) measurements in NLOS environments. The TDOA range errors are modeled as dependent, where...
Long term evolution (LTE) is the next generation wireless communication network which an all-IP based system. Nowadays, more and kinds of services are being transmitted on with different requirements. So, to satisfy quality service (QoS) multi-service requirements one key challenges that need be dealt in LTE In this paper, we propose a cross layer solution called token bucket scheduler (TBS) for real time allocates resource block (RB) order meet their QoS TBS utilizes instantaneous downlink...
Studies of the navigational patterns assisted living facility residents with dementia have resulted in many insights into progression e.g. more tortuous navigation has been associated declining mental capability. In this pilot investigation, we found minute changes features such as speed, path-efficiency, angle-turn and, ambulation-fraction were predictive cognitive function. study, data 10 subjects an collected daily over a period one year using Ultrawideband real-time location system...
Due to its significance in numerous applications, indoor positioning has garnered increasing interest. The WiFi fingerprinting method and pedestrian dead reckoning approach are the most popular methods for positioning. However, both have certain limitations terms of accuracy response time, rendering them ineffective some applications. To overcome these problems, we propose a system based on edge computing that combines two methods. results our experiments show proposed outperforms standalone...