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In this paper, transmit beamforming and antenna selection techniques are presented for the Cooperative Distributed Antenna System. Beamforming technique with minimum total weighted transmit power satisfying threshold SINR and Per-Antenna Power constraints is formulated as a convex optimization problem for the efficient performance of Distributed Antenna System (DAS). Antenna Selection technique is implemented in this paper to select the optimum Remote Antenna Units from all the available ones. This achieves the best compromise between capacity and system complexity. Dual polarized and TriplePolarized systems are considered. Simulation results prove that by integrating Beamforming with DAS enhances its performance. Also by using convex optimization in Antenna Selection enhances the performance of multi polarized systems.

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In this article, a high-level DC / DC converter is introduced with an external CVS circuit.Theory and experimental results indicate that the control mechanism has a double input design that in particular decreases the cost of the PV generation system;The ZVS auxiliary circuit suggested effectively increases the performance of the converter. The power and control system is straightforward, much like the traditional two-phase booster conversion system.