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In this paper, a new spectrum sharing model referred to as riding on the primary (RoP) is proposed for wireless- powered IoT devices with ambient backscatter communication capabilities. The key idea of RoP is that the secondary transmitter harvests energy from the primary signal, then modulates its information bits to the primary signal, and reflects the modulated signal to the secondary receiver...
In this paper, the multi-pair two-way relaying multi-input multiple-output system is considered, in which K-pair users exchange information within communication pair, by a shared amplify-and-forward relay station equipped with N antennas, N ≫ 2K. Considering two kinds of receiver, i.e., maximum-ratio combining receiver and zero-forcing receiver, we investigate the achievable rate performance in Ricean...
In this paper, we consider an energy harvesting multiple access channel (MAC) where the transmitters are powered by energy harvested from the ambient environment. We assume that the energy harvesting processes at the transmitters can be modeled as independent Bernoulli processes with parameters λis, and the channel states between the transmitters and the receiver are independent Bernoulli processes...
Many smart grid communications are delay sensitive and have very strict timing requirements for message deliveries. For example, trip protection messages must be delivered to the destination within 3 ms according to IEC 61850. Such time-critical communications are vulnerable to flooding attacks which attempt to increase message delivery delay through congesting the network channel and exhausting the...
The average symbol error performance of coherent detection of M-ary phase-shift keying (MPSK) signals with receiver imperfections is analyzed for the Rician and Rayleigh fading channels in this paper. Considering phase error, quadrature error, and I-Q gain mismatch, closed-form expressions for the average symbol error rate (SER) are derived. Our new theoretical expressions can offer an effective evaluation...
In this paper, we aim to develop scheduling policies to maximize the stability region of a wireless network under the assumption that mutual information accumulation is implemented at the physical layer. This enhanced physical layer capability enables the system to accumulate information even when the link between two nodes is not good and a packet cannot be decoded within a slot. The result is an...
In this paper, we investigate the transmission completion time minimization problem in a two-user additive white Gaussian noise (AWGN) broadcast channel, where the transmitter is able to harvest energy from the nature. The harvested energy is modeled to arrive at the transmitters randomly. In this paper, under a deterministic system setting, we assume that the energy harvesting times and harvested...
This paper describes a driver distraction detection scenario which is important to enhance driving safety. We employ data obtained by a GPS to reproduce the driver behavior. Gaussian Mixture model (GMM) is used to capture the sequence of driving characteristics according to the reconstructed vehicle's information and it is also used as a classifier to assign the driving behavior to normal or distraction...
In this paper, we present the formal semantics of sequence diagrams. The semantics of a sequence diagram is interpreted as a consecutive execution of steps in UTP. The semantics clearly captures the consistency between the design class diagram and sequence diagrams. This may underpin development of model consistency checking functions in UML CASE tools. It may also be used to reason about the correctness...
The Real Time Kinematics Global Positioning System (RTK-GPS) has been proved to be a feasible tool for structure health monitoring. However, there are some limitations using the traditional RTK method under the long baseline conditions, and annoying ionospheric delay.To eliminate this delay, in this paper we present an improved Extended Kalman Filter with Triple-Differenced Ionospheric-Free (EKF-TDIF)...
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