Dual Frequency Circular Shaped Two Port MIMO Antenna
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ANFIS Controlled Solar Pumping System
Dual Frequency Circular Shaped Two Port MIMO Antenna
Due to the ever increasing requirement of faster data propagation, Multiple Input Multiple Output (MIMO) is an emerging topic in the future generation wireless communications in which spectrum efficiency, network coverage, and link reliability factors can be easily achieved. By combining MIMO and Phase Shift Keying (PSK) modulation, this paper proposes a novel technique termed as MIMO-PSK receiver in order to perform significant improvement in channel capacity in presence of Space-Time Block Coding (STBC) over multipath fading channels. STBC provides full or near full data rate according to its orthogonality principle. Higher order MIMO-PSK receiver configurations are mainly considered for simulating optimal channel performances, i.e. Bit Error Rate (BER) as well channel capacity. From MATLAB simulations, it is clear that optimal channel performance of MIMO-PSK receiver can be obtained with increasing number of antennas as well as higher order PSK modulation.
In this work, the performance of three phase PWM inverter fed PMSM drive is analyzed on the latest Matlab Simulink environment. Efforts have been made to reduce the distortion and harmonic contents in the current waveform. This has been done by varying parameters of the motor along with suitable variation in the parameters of PI controller. The motor was subjected to a step load. It has also been found that, by providing power supply in discrete form improved the current waveform and also reduced ripples in the torque. This observation paved way to sample the load at the same rate as of that of power supply. The authors have also calculated the Total Harmonic Distortion (THD) in the current waveform by Fast Fourier Transform and finally observed that due to different level of transient in each phase there is a variance in THD.
In this paper, a high speed 64-bit double precision Floating Point Unit (FPU) using Vedic mathematics is proposed. In a general processor, the multiplication and division architectures play a crucial role in deciding the overall speed of the system. However, the standard algorithms are sequential units and reduce the performance of the processor. Vedic Mathematics on the other hand offers a new holistic approach of realizing these operations in a combinational unit. In the proposed architecture, the multiplication operation has been implemented using a 54-bit Vedic multiplier based on Urdhva Tiryagbhyam Algorithm while an optimized binary division architecture using Nikhilam Sutra is realized. The proposed method is coded in Verilog High Description Language (HDL), synthesized for Spartan 6 Field-Programmable Gate Array (FPGA) board and simulated using Xilinx Vivado Design Suite. An operating frequency of 205.08 MHz has been attained, which is 92.61% faster than the conventional implementation of a 64-bit floating point unit. The number of slice registers required for the overall realization of the FPU has also been reduced significantly by 94.3% and hence reducing the area requirement of the FPU in a general processor.
Automation or automatic control is the use of various control systems for operating equipments, such as machinery, processes in industries and other applications with minimal or reduced human intervention. Industrial automation can be achieved by several different means, including mechanical, electrical, electronic, hydraulic, pneumatic, and computers. Here, the authors have implemented Industrial IoT system that allows a single industry operator to control industry appliances with ease using Raspberry Pi 3B. The primary drive for automation using Internet of Things (IoT) is to significantly reduce operating expenditures when sensors and actuators become Internet-enabled devices. The proposed system allows for automation of industrial loads based on continuous monitoring of temperature, pressure, and presence of volatile gas in industrial environment to achieve automation over internet. Here, TruVnc Mobile app is used for monitoring the industrial parameters. User is allowed to control machine/load switching over internet using PubNub interface from anywhere in the world over internet. The Raspberry pi 3 model B processor captures these commands (Controlling signals) by internet and processes the received data to extract user commands. After receiving Sensor data it displays it on a monitor. Also it enables to switch the loads ON/OFF based on received commands to achieve user desired output. Thus Internet of Things (IoT) help in increasing output and automating processes across a lot of industries.
The aim of this review paper is to define the role of SiGe HBTs within the Technology Revolution that will lead to a globally interconnected smart world. At first, the authors have presented the recent developments of SiGe BiCMOS technologies and their applications to unit circuit blocks and integrated solutions. Then modern HBT device structures, technological aspects, scaling strategies, design issues, and future directions are also discussed. TCAD-based simulations predict that SiGe HBTs with cut-off and maximum oscillation frequencies of 780 GHz and 2 THz, respectively will become feasible by the year 2030.