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This paper proposes a localization method for wireless sensor nodes that utilize tri-directional coils for near-field magnetic induction (MI) communications. Taking advantage of magnetic field measurements of the tri-directional coils, the proposed localization algorithm uses only two anchor nodes to locate a sensor node in the 3-D space. Assuming each anchor node sequentially transmits the communication...
Features of using the energy of electromagnetic radiation for modern electronics are considered. The structure of the sensor with a receiver of radio emission energy, the methods of use and the field of application of radio emission energy receiverst.
A large number of WSN applications with bursty traffic have emerged in the recent past such as rare event detection and forest fire monitoring. Bursty traffic in Wireless Sensor Networks (WSNs) offers various challenges in terms of reliability and latency. Unlike periodic monitoring, energy consumption is far more challenging to deal with in WSN applications with bursty traffic due to long periods...
In most of wireless sensor network (WSN) applications, energy-efficiency and low end-to-end transmission delay (E2ETD) are essential requirements. This paper presents a contention based routing enhanced MAC protocol, named as CR-MAC, for E2ETD reduction in a multi-hop WSN. CR-MAC reduces E2ETD by optimizing the time interval between the successively sent data packets of a node in a scheduled flow...
The application of Wireless Power Transfer (WPT) systems is primarily limited by its energy transfer efficiency. For modern WPT that utilises Strongly Coupled Magnetic Resonances (SCMR), which transfers energy by using the mutual inductance between coils, a higher efficiency can be achieved compared with a conventional air-core transformer module. An SCMR normally works at a desired frequency which...
A method for detecting human motion in complex scenarios based on Channel State Information (CSI) is presented. First, the sensitivity of CSI phase information to human motion is explored, especially to the strenuous motion. Through a large number of experiments, the influence of human motion on CSI phase is found out, and the characteristics of signal changes are extracted. The One-class Support...
This paper presents a new transceiver for impulse radio ultra-wideband (IR-UWB) systems. This work is related to CHIST-ERA SMARTER project (Smart Multifunctional Architecture and Technology for Energy aware wireless sensoRs) which address autonomous wireless sensors nodes. The ultra low-power transceiver consists of an on-off keying (OOK) modulator/demodulator and a pulse generator. To reduce power...
This paper considers a wireless power transfer system with multiple antennas by using the multicarrier signal waveforms. A prior art optimizes the waveform with the channel state information at the transmitter (CSIT) to improve the energy harvesting efficiency of the receiver with the non-linear model. The impact of the imperfect CSIT on the energy harvesting capability is studied as a function of...
This paper studies the physical layer security of uplink (UL) transmission in simultaneous wireless information and power transfer (SWIPT) deployed in wireless sensor networks (WSNs). Firstly, we model the random network as Poisson cluster process (PCP) to focus on the case where eavesdroppers hide around certain targets to intercept the confidential information successfully. Then, the communication...
Wireless multimedia sensor networks (WMSNs) require data to be communicated timely and reliably. However, radio transmission errors incurred by wireless channel make it difficult to achieve these qualities simultaneously. To provide good quality of service (QoS) of WMSNs, parameters associated with the WMSNs need to be studied completely and best tradeoff needs to be made. To characterize the delay-reliability...
Wireless Sensor Networks (WSNs) have gained significant attention due to their wide range of applications. In these networks, the sensor nodes collect different types of data from the surrounding environment. There are many applications that require sensor node to transmit urgent data packets faster than normal data packets. In the literature, most of the available medium access control (MAC) protocols...
As a step toward sustainable wireless sensing, we present a proof of concept system that uses a Plant Microbial Fuel Cells (PMFC) as a power source. To match the very low power production capabilities of the PMFC, we couple it with an ultra-low power wake-up receiver used as a trigger for sampling and transmission of the sensed value. We demonstrate that this combination, with a new, receiver initiated...
Radio-on-demand wireless sensor networks (WSN) are expected to be expanded the lifetime of sensor nodes because the receiver effectively utilizes the sleep/wake-up control function. The multi-carrier code division multiple access (MC-CDMA) using modified pseudo orthogonal M-sequence sets (MPOMS) codes have been proposed for radio-on-demand WSN systems. In this paper, the rigorous communication success...
In this paper, a maximum efficiency extracting technique is presented for endoscopic capsule's Wireless Power Transfer (WPT). Instead of conventional regulators, a DC-DC Bulk LTC3129-1 with Maximum Power Point Control (MPPC) capability is adopted to boost the power conversion efficiency of the WPT receiver (including RF-DC rectifier and DC-DC Converter) up to 60%. Measurements validate that DC-DC...
Partial Discharge (PD) occurs when insulation containing defects or voids is subject to high voltages. If left untreated PD can degrade insulation until, eventually, catastrophic insulation failure occurs. The detection of PD current pulses, however, can allow incipient insulation faults to be identified, located and repaired prior to plant failure. Wireless technology has paved the path for PD detection...
Despite the fact that cooperative localization approaches stand well in Wireless Sensor Networks (WSNs), they impose challenge of increased energy consumption resulting from the important communication overhead required to accomplish the localization task. In this paper, we developed an Energy Aware Cooperative Localization approach (EACL) based on using a recursive localization system. Obviously,...
Developing sustainable wireless sensor networks (WSNs) poses a unique challenge in terms of estimating the trade off between autonomous sensor network operations and accessibility to constrained power resources. WSNs are expected to be operational for prolonged periods with minimal intervention. However, this imposes substantial cost in terms of power (battery) requirements in WSNs. Under several...
The paper proposes a fast multi-target detection technique based on simultaneous sensor data fusion for a binary wireless sensor network in a pre-deployed configuration. The synchronous binary sensors are circularly arranged in an area with the sink node on the central axis such that the line-of-sight communication dominates. All the binary sensors employed for detecting rapidly changing targets are...
In this work, communication over a time-correlated point-to-point wireless channel is studied for an energy harvesting (EH) transmitter. In this model, we take into account the time and energy cost of acquiring channel state information. At the beginning of the time slot, the EH transmitter, has to choose among three possible actions: i) deferring the transmission to save its energy for future use,...
We consider the problem of enabling a passive sensor to communicate, by integrating wireless power transfer and ambient backscatter transmission. The passive sensor collects energy from the radio-frequency signal emitted by an existing (legacy) transmitter, and uses such an energy to modulate its information by reflecting the legacy signal. In particular, we study the case when the intended receiver...
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