• A wireless sensor network based structural health monitoring system for an airplane

      Notay, J.K.; Safdar, Ghazanfar Ali (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2011)
    • Wireless sensor positioning with ultrawideband fingerprinting

      Ultrawideband (UWB) systems offer high spatiotemporal resolution and are therefore well suited to sensor localization applications. In this paper, we consider the use of UWB signals for positioning and ranging based on fingerprinting using a channel impulse response database. We use indoor measurements to demonstrate the reduction in the location estimation ambiguity and false alarm probability with an increase in the channel bandwidth.
    • Works in progress

      Mossiere, Jacques; Curry, Edward; Beloued, Abdelkrim; Gilliot, Jean-Marie; Andre, Françoise; Segarra, Maria-Teresa; Dyo, Vladimir; Di Muro, Etienne Antoniutti; Jaeger, Michael A. (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2006)
    • Worst case bounds of a cluster-based MAC protocol for wireless sensor networks

      Aslam, Nauman; Phillips, William; Safdar, Ghazanfar Ali (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2012)
      Quality of service is becoming highly important in wireless sensor networks (WSNs) due to many emerging applications; hence the need to know the worst case bounds for traffic delay and backlog in such networks is valuable. Network calculus provides a methodology for determining the worst case bounds in packet scheduling using the concept of arrival and service curves. Using Network Calculus, this paper presents a mathematical model of a TDMA-based medium access control protocol, where a cluster based system is modeled and arrival/service curve is proposed. In addition, the model is also extended to allow finding the maximum delay and backlog bounds for applications with certain QoS requirements.