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This paper proposes a contactless charging platform with reconfigurable coils which compose a hexagonal coil array complied with wireless power consortium A3 standard. The function of contactless charging platform (CCP) that switches one of them to excite is to avoid the current cancellation phenomenon and to prevent the magnetic field attenuation. The CCP transmits wireless power to the secondary...
In this paper a diagonal cyclotomic space-time coding (DCSTC) transmission scheme for wireless cooperative relay networks is proposed. We consider the full-duplex cooperation which is more spectrally efficient than the half-duplex cooperation. By the combination of multidimensional complex constellation symbols rotation and Hadamard transform, the proposed scheme is capable of achieving full cooperative...
Trust decision made by sensor nodes and its dynamics constitute building blocks to secure and stabilize the whole Wireless Sensor Networks (WSNs). To disclose this evolutionary process, we study the dynamics of a sensor node making a trust decision that will determine whether to cooperate with others. A trust game for sensor nodes is created to reflect sensor nodes' utilities during their trust decisions...
Based on the research of anti-interference performance of IR-UWB, this paper studies the performance of a new kind of Chirp Code-Orthogonalized Transmitted-Reference Ultra-Wideband (Chirp-COTR-UWB) system in presence of single frequency interference, facing the application demands of expand distance UWB wireless communication. The output component expression of Chirp-COTR-UWB receivers in presence...
TCP is primarily designed for wired networks and became very efficient and robust with years of enhancements. However, experiments and research showed that TCPpsilas congestion control algorithm performs very poorly over Wireless Sensor Networks with degraded throughputs. This paper studies TCPpsilas throughput issues in Wireless Sensor Networks, and designs an improved congestion control algorithm...
Transmission control protocol (TCP) is a reliable, end-to-end transport protocol, which is widely used for data services and is very efficient for wired networks. However, experiments and research showed that TCP's congestion control algorithm performs very poorly over wireless sensor networks with degraded throughputs. This paper studies TCP's throughput issues in wireless sensor networks, and designs...
The Stackelberg game is introduced into the power control game, which makes all users in system work in the best equal signal-to-interference (SIR). A new distributed algorithm based on Stackelberg power control game (SPG) is proposed. The simulation results indicate the algorithm can improve the capability of the system. Users receive higher utility and lower transmit power relatively, the use of...
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