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Wireless underground sensor networks (WUSNs) based on magnetic induction (MI) have been recently proposed as a promising candidate for underground networking. The benefit of the MI-WUSNs compared to other solutions (e.g. so-called Through-The-Earth communication) is related to the substantially lower path loss and lower vulnerability to the changes of the soil properties. In the past, some efforts...
Wireless underground sensor networks (WUSNs) present a variety of new research challenges. Magnetic induction (MI) based transmission has been proposed to overcome the very harsh propagation conditions in underground communications in recent years. In this approach, induction coils are utilized as antennas in the sensor nodes. This solution achieves larger transmission ranges compared to the traditional...
In this paper, we investigate the physical-layer security for a wireless two-hop relay network in the presence of channel estimation errors when estimating the channel state information (CSI) of the main links (from the source via relays to the destination) and wiretap links (from the source and relays to the eavesdropper). The eavesdropper can not only overhear the confidential signals transmitted...
In this paper, we consider a cooperative relay network consisting of a source, a destination, and multiple decode-and-forward (DF) relays in the presence of multiple eavesdroppers, which intend to tap confidential messages transmitted by both the source and the relays. We propose a so-called secrecy maximization oriented relay selection (SMORS) scheme to improve the physical-layer security of wireless...
This paper describes a 0.18-μm CMOS ASIC, featuring a low power and highly integrated 802.15.4 transceiver with MAC support, a 100-μA programmable signal conditioning, and an inductor-less power management circuit. A compact sensor node for wireless ambulatory blood pressure monitoring (ABPM) using this ASIC is demonstrated. The whole ASIC including the Zigbee transceiver shows state of the art performance...
The SCOR-model contains five primary management processes, namely, Plan, Source, Make, Deliver, and Return. The development of radio frequency identification (RFID) technology provides an efficient way to improve the supply chain performance. In this paper, the application of RFID technology in a SCOR-model driven enterprise production system (EPS) is introduced. The framework and architecture of...
Ultra and Very high speed radio platforms are key developing technologies for emerging applications but raise issues of efficient radio spectrum management, wireless coexistence and interoperability, from the radio physical layers to the media access control layers. Among these broadband radio platforms, Ultra Wide Band (UWB) is a very promising technology for the broadband transmission of data using...
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