Volume 16, Issue 2 (June 2020)  

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Abstract (2728 Views) | Full-Text (PDF) (994 Downloads)   |   Highlights
  • We introduced the additive exponential noise (AEN) channel afflicted by an extra additive exponential interference (AEI) in which full knowledge of the additive interference is given to the transmitter.
  • The AENC-AEI is in fact an exponential version of the Costa’s dirty paper channel.
  • The AENC-AEI is a natural model for the complex-valued AWGNC-AWI when the transmitted signal suffers from a fast-varying phase noise and the receiver has to use a non-coherent detector to recover transmitted information.
  • Interestingly, the high SNR-capacity of the AENC-AEI (obtained in this paper) is independent of the interference mean and has a simple closed-form expression, analogous to its Gaussian counterpart.

Abstract (3232 Views) | Full-Text (PDF) (1217 Downloads)   |   Highlights
  • This paper is different from other papers in the sense that both the discrete amplitudes as well as discrete phases are digitally controlled using attenuators and phase shifters with mutual coupling effects. This reduces the complexity in the feeding networks.
  • Mutually coupling is duly considered by introducing the DRR parameter.
  • Along with the HPBW parameter, which is usually considered in most of the papers, beamwidth at SLL is considered in addition to HPBW.
  • All the above are simultaneously done in a single paper.
  • In addition to the radiation pattern parameters, statistical parameters are also included for comparison purposes.

Abstract (2840 Views) | Full-Text (PDF) (1053 Downloads)   |   Highlights
  • A new framework for using swarm intelligence-based heuristic optimization algorithms in dynamic optimization.
  • Ability to use the framework in undetectable dynamic environments.
  • Matching the number of people in accordance with the environmental conditions.
  • A new definition called focus search zone to prevent early convergence and speed up local search.
  • Applying for solving the MPB problem and clustering variable-time data.

Abstract (2654 Views) | Full-Text (PDF) (1087 Downloads)   |   Highlights
  • Delay-dependent robust stability problem is investigated for uncertain neutral systems with discrete and distributed delays.
  • An augmented Lyapunov-Krasovskii functional involving triple integral terms is used.
  • The relationship between the retarded state with respect to the distributed delay and its derivative plays an important role.
  • Based on some integral inequalities, delay fractioning approach, and free weighting matrices, a new delay-dependent criterion in terms of linear matrix inequalities is proposed.
  • A numerical example is given to illustrate the effectiveness of the proposed method.

Abstract (2683 Views) | Full-Text (PDF) (1293 Downloads)   |   Highlights
  • A novel method is proposed for clustering of GPS GDOP.
  • The TDNN model is applied in the approximation of GPS GDOP.
  • Best subset and optimal group of satellites are chosen for positioning.
  • Actual navigation setup is used to testify the accuracy of the proposed method.

Abstract (3889 Views) | Full-Text (PDF) (2135 Downloads)   |   Highlights
  • A new application of LA for MOO in the optimal design of CMOS analog IC.
  • Proper definition of design parameters and objective functions to create an effective trade-off between performance characteristics.
  • Implementation of an automated design simulation tool by creating a link between two usable software environments.
  • Providing a comprehensive criterion to evaluate the proposed approach due to the simultaneous effect of objectives and design specifications on the optimization problem.
  • The statistical evaluation of the proposed approach based on numerical results obtained from circuit simulations with other competing algorithms.

Abstract (3644 Views) | Full-Text (PDF) (1162 Downloads)   |   Highlights
  • Distributed nonlinear robust controllers are designed for PV, BESS and SG implemented in islanded microgrids;
  • The designed robust controller ensures robustness and global system stability against uncertainties and load changes;
  • The controllers are based on Lyapunov stabilization theory and super-twisting integral sliding mode control;
  • These controllers are robust, have quick response times, and, most importantly, their control signals satisfy the systems physical constraints;

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© 2022 by the authors. Licensee IUST, Tehran, Iran. This is an open access journal distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) license.