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"Gyre precoding and t-transformation-based gfdm system for uav-aided mm" by Joarder Jafor Sadique, Shaikh Enayet Ullah et al.

In this paper, an unmanned aerial vehicle (UAV)-aided multi-antenna configured downlink mmWave cooperative generalized frequency division multiplexing (GFDM) system is proposed. To provide physical layer security (PLS), a 3D controlled Lorenz mapping system is introduced. Further-more, the combination of T-transformation spreading codes, walsh Hadamard transform, and discrete Fourier transform (DFT) techniques are integrated with a novel linear multi-user multiple-input multiple-output (MU-MIMO) gyre precoding (GP) for multi-user interference reduction. Furthermore, concatenated channel-coding with multi-user beamforming weighting-aided maximum-likelihood and zero forcing (ZF) signal detection schemes for an improved bit error rate (BER) are also used. The system is then simulated with a single base station (BS), eight massive machine-type communications (mMTC) users, and two UAV relay stations (RSs). Numerical results reveal the robustness of the proposed system in terms of PLS and an ....

Cooperative Unmanned Aerial Vehicle , Eneralized Frequency Division Multiplexing , Yre Precoding , Massive Machine Type Communication , Out Of Band , Hysical Layer Security , Signal To Interference Plus Noise Ratio , T Transformation Spreading Codes ,

"Transceiver Design for Full-duplex UAV based Zero-padded OFDM System w" by Joarder Jafor Sadique, Shaikh Enayet Ullah et al.

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 ....

Base Stations , Bit Error Rate , Channel Coding , Peak To Average Power Ratio , Hysical Layer Security , Hysical Layer Security Encryption , Signal To Noise Ratio , Unmanned Aerial Vehicles , Ero Padded Orthogonal Frequency Division Multiplexing , அடித்தளம் நிலையங்கள் ,