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Mixed numerologies interference analysis and inter-numerology interference cancellation for windowed OFDM systems. Enlighten -Research publications by members of the University of Glasgow http://eprints.gla.ac.uk communications (URLLC) and massive machine type communications (mMTC) [1]. The mMTC application prefers smaller subcarrier spacing and thus larger symbol duration to support

Unmanned aerial vehicle (UAV) networks are playing an important role in various areas due to their agility and versatility, which have attracted significant attention from both the academia and industry in recent years. As an integration of the embedded systems with communication devices, computation capabilities and control modules, the UAV network could build a closed loop from data perceiving, information exchanging, decision making to the final execution, which tightly integrates the cyber processes into the physical devices. Therefore, the UAV network could be considered as a cyber physical system (CPS). Revealing the coupling effects among the three interacted components in this CPS system, i.e., communication, computation and control, is envisioned as the key to properly utilize all the available resources and hence improve the performance of the UAV networks. In this paper, we present a comprehensive survey on the UAV networks from a CPS perspective. Firstly, we respectively research the basics and advances with respect to the three CPS components in the UAV networks. Then we look inside to investigate how these components contribute to the system performance by classifying the UAV networks into three hierarchies, i.e., the cell level, the system level, and the system of system level. Further, the coupling effects among these CPS components are explicitly illustrated, which could be enlightening to deal with the challenges in each individual aspect. New research directions and open issues are discussed at the end of this survey. With this intensive literature review, we try to provide a novel insight into the state-of-the-art in the UAV networks.

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Abstract-In this paper, we investigate the secrecy performance for a multiple-input multiple-output (MIMO) wiretap channel in the presence of a multi-antenna eavesdropper. In particular, the legitimate transmitter uses transmit antenna selection (TAS) to transmit on a single antenna with the largest signal-to-noise ratio (SNR) while both the legitimate receiver and the eavesdropper adopt maximal ratio combining (MRC) for reception. We derive exact closed-form expressions for the probabilities of positive secrecy rate and secrecy outage with imperfect feedbacks due to feedback delay and/or error. Furthermore, we derive the asymptotic secrecy outage probability at high signal-to-noise ratio (SNR) for the transmitter-receiver channel, which accurately reveals the secrecy diversity loss due to imperfect feedbacks. Simulation results are provided to verify our analytical results and illustrate the impacts of imperfect feedback on the secrecy performance of such a wiretap system.

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