Now showing items 1-14 of 14

    • ADV-MAC: analysis and optimization of energy efficiency through data advertisements for wireless sensor networks 

      Ray, Sourya; Seyfettin Demirkol, Ilker; Heinzelman, Wendi (Elsevier, 2011-07)
      Article
      Restricted access - publisher's policy
      Several Medium Access Control (MAC) protocols have been proposed for wireless sensor networks with the objective of minimizing energy consumption. For example, Sensor-MAC (S-MAC) was proposed to reduce energy consumption ...
    • BaNa: a noise resilient fundamental frequency detection algorithm for speech and music 

      Yang, Na; Ba, He; Cai, Weiyang; Seyfettin Demirkol, Ilker; Heinzelman, Wendi (2014-08-27)
      Article
      Open Access
      Fundamental frequency (F0) is one of the essential features in many acoustic related applications. Although numerous F0 detection algorithms have been developed, the detection accuracy in noisy environments still needs ...
    • Enhanced multiclass SVM with thresholding fusion for speech-based emotion classification 

      Yang, Na; Yuan, Jianbo; Zhou, Yun; Seyfettin Demirkol, Ilker; Duan, Zhiyao; Heinzelman, Wendi; Sturge Apple, Melissa L. (2017-03-01)
      Article
      Open Access
      As an essential approach to understanding human interactions, emotion classification is a vital component of behavioral studies as well as being important in the design of context-aware systems. Recent studies have shown ...
    • How does noise impact speech-based emotion classification? 

      Yang, Na; Yuan, Jianbo; Zhou, Yun; Seyfettin Demirkol, Ilker; Heinzelman, Wendi; Sturge Apple, Melissa L. (2014)
      Conference report
      Open Access
      Emotion classification, Support vector machine, Thresholding fusion, Noisy speech
    • MH-REACH-Mote: supporting multi-hop passive radio wake-up for wireless sensor network 

      Chen, Li; Warner, Jeremy; Seyfettin Demirkol, Ilker; Heinzelman, Wendi (2015)
      Conference report
      Open Access
      A passive wake-up radio in a wireless sensor network (WSN) has the advantage of increasing network lifetime by using a wake-up radio receiver (WuRx) to eliminate unnecessary idle listening. A sensor node equipped with a ...
    • Passive wake-up radios: from devices to applications 

      Ba, He; Seyfettin Demirkol, Ilker; Heinzelman, Wendi (Elsevier, 2013-11)
      Article
      Restricted access - publisher's policy
      Energy efficiency is one of the most important criteria in the design of a wireless sensor network. Sensor nodes are usually battery-powered and thus have very limited lifetime. In this paper, we introduce a novel passive ...
    • Range extension of passive wake-up radio systems through energy harvesting 

      Chen, Li; Cool, Stephen; Ba, He; Heinzelman, Wendi; Seyfettin Demirkol, Ilker; Muncuk, Ufuk; Chowdhury, Kaushik Roy; Basagni, Stefano (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Conference report
      Restricted access - publisher's policy
      Use of a passive wake-up radio can drastically increase the network lifetime in a sensor network by reducing or even completely eliminating unnecessary idle listening. A sensor node with a wake-up radio receiver (WuRx) can ...
    • REACH2-Mote: a range-extending passive wake-up wireless sensor node 

      Chen, Li; Warner, Jeremy; Yung Pak, Lam; Zhou, Dawei; Heinzelman, Wendi; Seyfettin Demirkol, Ilker; Muncuk, Ufuk; Chowdhury, Kaushik Roy; Basagni, Stefano (2015-11-01)
      Article
      Open Access
      A wireless sensor network that employs passive radio wake-up of the sensor nodes can reduce the energy cost for unnecessary idle listening and communication overhead, extending the network lifetime. A passive wake-up radio ...
    • Speech-based emotion classification using multiclass SVM with hybrid kernel and thresholding fusion 

      Yang, N.; Muraleedharan, Rajani; Khol, J.; Seyfettin Demirkol, Ilker; Heinzelman, Wendi; Sturge Apple, Melissa L. (2012)
      Conference report
      Restricted access - publisher's policy
      Emotion classification is essential for understanding human interactions and hence is a vital component of behavioral studies. Although numerous algorithms have been developed, the emotion classification accuracy is ...
    • Stateless multicast protocol for ad-hoc networks 

      Feng, Chen-Hsiang; Zhang, Yuqun; Seyfettin Demirkol, Ilker; Heinzelman, Wendi (2012-02)
      Article
      Restricted access - publisher's policy
      Multicast routing protocols typically rely on the a priori creation of a multicast tree (or mesh), which requires the individual nodes to maintain state information. In dynamic networks with bursty traffic, where long ...
    • Supporting bursty traffic in wireless sensor networks through a distributed advertisement-based TDMA protocol (ATMA) 

      Ray, Surjya; Seyfettin Demirkol, Ilker; Heinzelman, Wendi (Elsevier, 2013-05)
      Article
      Restricted access - publisher's policy
      Nodes in wireless sensor networks (WSNs) are battery powered and oftentimes deployed in remote and hostile locations. Energy conservation is, therefore, one of the primary goals of MAC protocols designed for these networks. ...
    • Time-Knocking: a novel addressing mechanism for wake-up receivers 

      Oller Bosch, Joaquim; Seyfettin Demirkol, Ilker; Paradells Aspas, Josep; Casademont Serra, Jordi; Heinzelman, Wendi (Institute of Electrical and Electronics Engineers (IEEE), 2012)
      Conference report
      Restricted access - publisher's policy
      Wake-up radios present a promising alternative to traditional duty-cycle approaches, by reducing overhearing and by eliminating idle listening completely. However, energy-efficient operation of the wake-up mechanism is ...
    • Token-MAC: A fair MAC protocol for passive RFID systems 

      Chen, Li; Seyfettin Demirkol, Ilker; Heinzelman, Wendi (2014-06)
      Article
      Restricted access - publisher's policy
      Passive RFID systems used for inventory management and asset tracking typically utilize contention-based MAC protocols, such as the standard C1G2 protocol. Although the C1G2 protocol has the advantage that it is easy to ...
    • UPS: Universal Protocol Stack for emerging wireless networks 

      Feng, Chen-Hsiang; Seyfettin Demirkol, Ilker; Heinzelman, Wendi (Elsevier, 2013-03)
      Article
      Restricted access - publisher's policy
      Recent devices developed for emerging wireless networks, such as 4G cellular networks, wireless mesh networks, and mobile ad hoc networks, support multiple communication substrates and require execution of multiple protocols ...