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Based on the Cockcroft-Walton (CW) voltage multiplier, a novel receiver topology for IPT (Inductive Power Transfer) system is proposed. The proposed receiver topology enhances the efficiency of the IPT system through achieving that the induced secondary voltage and current are in-phase with the appropriate control method. This paper carried on the modeling of the receiver topology, and deduced the...
Cyber-security has become a critical issue for realtime distributed embedded systems in domains such as automotive, avionics, and industrial automation. However, in many of such systems, tight resource constraints and strict timing requirements make it difficult or even impossible to add security mechanisms after the initial design stages. To produce secure and safe systems with desired performance,...
This letter considers the performance of secondary networks using an Aloha-type random access protocol with multi-packet reception (MPR) for interference-limited communication. To simplify the analysis, it is usually assumed a specific backoff scheme, geometric retransmission for instance, for cognitive access in previous studies. Consequently, how to achieve the optimal performance of cognitive networks...
Cognitive radio can effectively improve spectrum utilization by allowing the secondary user to access spectrum licensed to the primary user. According to cognitive radio principle, the secondary user can access the channel only when sensed idle. In this paper, we study the spectrum-sharing problem of a basic cognitive network consisting of a primary user (PU) link and a secondary user (SU) link, and...
How to improve the spectrum utility of the unlicensed uses (secondary users) without interfering the licensed spectrum holders' usage becomes a key issue in the cognitive radio system. In this paper, we consider an underlay cognitive radio system in which the secondary users can make use of the allowance of the primary users' SINR constraints and operate on the same spectrum band as the primary signals...
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