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J. Sens. Actuator Netw., Volume 6, Issue 1 (March 2017)

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Editorial

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Open AccessEditorial Acknowledgement to Reviewers of JSAN in 2016
J. Sens. Actuator Netw. 2017, 6(1), 1; doi:10.3390/jsan6010001
Received: 10 January 2017 / Revised: 10 January 2017 / Accepted: 10 January 2017 / Published: 10 January 2017
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Abstract
The editors of JSAN would like to express their sincere gratitude to the following reviewers for assessing manuscripts in 2016.[...] Full article

Research

Jump to: Editorial

Open AccessArticle A Framework for Multiple Object Tracking in Underwater Acoustic MIMO Communication Channels
J. Sens. Actuator Netw. 2017, 6(1), 2; doi:10.3390/jsan6010002
Received: 1 September 2016 / Revised: 25 January 2017 / Accepted: 1 February 2017 / Published: 8 February 2017
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Abstract
This work presents a computational framework for the analysis and design of large-scale algorithms utilized in the estimation of acoustic, doubly-dispersive, randomly time-variant, underwater communication channels. Channel estimation results are used, in turn, in the proposed framework for the development of efficient high
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This work presents a computational framework for the analysis and design of large-scale algorithms utilized in the estimation of acoustic, doubly-dispersive, randomly time-variant, underwater communication channels. Channel estimation results are used, in turn, in the proposed framework for the development of efficient high performance algorithms, based on fast Fourier transformations, for the search, detection, estimation and tracking (SDET) of underwater moving objects through acoustic wavefront signal analysis techniques associated with real-time electronic surveillance and acoustic monitoring (eSAM) operations. Particular importance is given in this work to the estimation of the range and speed of deep underwater moving objects modeled as point targets. The work demonstrates how to use Kronecker products signal algebra (KSA), a branch of finite-dimensional tensor signal algebra, as a mathematical language for the formulation of novel variants of parallel orthogonal matching pursuit (POMP) algorithms, as well as a programming aid for mapping these algorithms to large-scale computational structures, using a modified Kuck’s paradigm for parallel computation. Full article
(This article belongs to the Special Issue WSN for Tracking and Localization)
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Open AccessArticle Novel Adaptive Transmission Protocol for Mobile Sensors that Improves Energy Efficiency and Removes the Limitation of State Based Adaptive Power Control Protocol (SAPC)
J. Sens. Actuator Netw. 2017, 6(1), 3; doi:10.3390/jsan6010003
Received: 30 November 2016 / Revised: 1 March 2017 / Accepted: 8 March 2017 / Published: 15 March 2017
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Abstract
In this paper, we have presented a novel transmission protocol which is suited for battery-powered sensors that are worn by a patient when under medical treatment, and allow constant monitoring of health indices. These body-wearable sensors log data from the patient and transmit
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In this paper, we have presented a novel transmission protocol which is suited for battery-powered sensors that are worn by a patient when under medical treatment, and allow constant monitoring of health indices. These body-wearable sensors log data from the patient and transmit the data to a base-station or gateway, via a wireless link at specific intervals. The signal link quality varies because the distance between the patient and the gateway is not fixed. This may lead to packet drops that increase the energy consumption due to repeated retransmission. The proposed novel transmission power control protocol combines a state based adaptive power control (SAPC) algorithm and an intelligent adaptive drop-off algorithm, to track the changes in the link quality, in order to maintain an acceptable Packet success rate (PSR)(~99%). This removes the limitation of the SAPC by making the drop-off rate adaptive. Simulations were conducted to emulate a subject’s movement in different physical scenarios—an indoor office environment and an outdoor running track. The simulation results were validated through experiments in which the transmitter, together with the sensor mounted on the subject, and the subject themselves were made to move freely within the communicable range. Results showed that the proposed protocol performs at par with the best performing SAPC corresponding to a fixed drop-off rate value. Full article
(This article belongs to the Special Issue Rechargeable Sensor Networks: Technology, Protocols, and Algorithms)
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