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Abstract In this paper, multi-antenna transceiver for zero-padded orthogonal frequency division multiplexing (OFDM) system is designed at mmWave by integrating full-duplex unmanned aerial vehicle (UAV) into the terrestrial cellular networks. Assuming that there exist no direct communication links between the ground base station (GBS) and the mobile users due to unexpected blockages from high storied buildings in urban area, the UAV applies decode-and-forward cooperative strategy on the received OFDM signals transmitted from GBS and re-transmits to the ground mobile users and passive eavesdropper. In this proposed system, intertwining logistic map (ILM)-cosine transform aided encryption algorithm combined with artificial noise enhancing physical layer security (PLS) is introduced. Also walsh-hadamard transform technique integrated with QR-decomposition based zero forcing (ZF) block diagonalization (QR-ZF-BD) precoding for multi-user interference reduction and non-iterative clip ....
Decoding Mars 2020 – Daniel Estévez destevez.net - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from destevez.net Daily Mail and Mail on Sunday newspapers.
Philips TV Tuner History pt5 Competition and Growth Introduction We have reached the end of the 1980s, probably the turning point in the Philips Tuner history. On the one hand the business has been doing well: constant consolidation of (mainly European and US) competitors has substantially increased the market share and volumes, making it one of the global top3 tuner makers. However, in parallel the emergence of Japanese competition has made the business environment increasingly harsh, with a serious pressure on profitability and thus cost. Although Philips with its UV800 tuner family has probably made the best tuner ever in terms of robustness and performance, this model is clearly too big and expensive and in the coming two decades we will see a continuous drive for cost reduction and the associated size reduction. One of the most remarkable steps in this context is the move to the World Standard Pinning (WSP), with Philips agreeing with its main competitors Alps and ....