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Pulsed power supply (PPS) is one of the electromagnetic forming (EMF) system components. Advances in power electronics converters led to more efficient and controllable pulsed power supplies. Development of solid-state based topologies in pulsed power applications have been considered in recent years. Using these topologies gives compactness and easiness to EMF systems unlike conventional structures...
This paper deals with the control design of an asymmetrical cascaded multilevel inverter. This structure therefore provides the capability to produce higher voltages at higher speeds with low switching frequency which has inherent low switching losses and high converter efficiency. Selective harmonic elimination(SHE) for asymmetrical multilevel CHB inverter control is proposed. The technique utilized...
Power Electronic Transformer(PET) is a promising component in the future power system. The PET can offer not only the functions of conventional low frequency transformer, but also many additional functions. Among all the additional functions, the reactive power control function is considered one of the most important one. This paper is discussing the application of reactive power control function...
In this paper, a DC-DC buck converter using a multi-bit (two-bits) delta-sigma modulator to control segmented output switches of the converter is proposed to enhance its efficiency and improve its output ripple. This converter operates in continuous condition mode (CCM). Here, the two output bits of the modulator control the switching of the main and the supplementary switches. The circuit is simulated...
This paper presents a comparison study on single-OpAmp resonators applied in ΣΔ modulators under the influence of nonidealities. In the recent state-of-the-art, single amplifier resonators have been proposed for the loopfilter to reduce hardware and thus power and area. The question arises if the effort for this single amplifier approach is indeed lower compared to the two amplifier approach, or if...
Power Electronic Transformer(PET) is a promising component in the future power system. The modular PET is the most attractive due to its high voltage level and flexible function. Unfortunately, when the modular PET is driving multiple loads, there would be overmodulation issue in the AC-DC stage caused by the unbalanced load power. This paper proposed a reactive component injection control strategy...
Traction converters in automotive applications benefit from various emerging technologies like semiconductor-materials such as SiC or converter topologies like multilevel converters. As especially novel topologies often lack an analytic way to determine their power losses or efficiency, comparability is often hard to achieve until each converter is built up and measured. With the proposed procedure...
Realization of high power conversion system utilizing parallel connected power converters rated at much smaller power levels due to limitations in switching device voltage and current ratings would be highly desirable. Therefore, modular configured converters are imminent in high power industrial applications due to their numerous benefits over singular high capacity converter or inverter. They can...
The performance of digital communication systems, depending on the signal modulation and demodulation. In this paper, loading several different jamming pattern to different digital communication modulation system models, the bit error rate(BER) under different conditions of jamming signal ratio(JSR) was in statistics through a large number of statistical simulation, the graph is giving to illustrate...
This paper investigates an augmented pure proportional navigation-based guidance strategy, which expands upon the need for precise control of the terminal approach and/or impact angle of an interceptor by also accounting for the maneuvering target's ability to counter attack, e.g., in air-to-air combat. Specifically, an anticipatory modulation of the augmentation parameter is presented and analyzed,...
This paper proposes Z (Impedance)-source inverter for single phase grid connected photovoltaic system. Unlike traditional voltage source inverter, Z-source inverter uses shoot-through (ST) duty cycle and modulation index to control output voltage. By modifying the traditional pulse width modulation (PWM) techniques, shoot through duty is accommodated to buck or boost the input voltage. Z-source network...
Differential encoded LDPC (DE-LDPC) coded systems with multiple symbol differential detection (MSDD) scheme can avoid good estimation of channel state information and compensate performance degradation of differential detection. In this paper, LDPC codes optimization for the DE-LDPC coded systems with MSDD is studied. Simulation results show that the optimized LDPC codes perform much better than the...
The Free Space Optics (FSO) proves to be a very effective and efficient technology for wireless communication. This emerging field basically uses invisible beams of light such as ultraviolet, infrared, etc. in order to provide optical bandwidth connections providing a high data rate than other technologies. This work exclusively deals with the designing of FSO systems using the simulation software...
In this paper, we propose a radio frequency lateral double diffused metal oxide semiconductor device with part of stepped buried oxide layer, and establish a model of the surface electric field of the device. From the simulation results, it is concluded that the surface electric field distribution model is basically consistent with the simulation results, and the new peak electric field is obtained...
In this paper we evaluate the performance of an optical interconnect configuration based on the wavelength remodulation approach, in order to realize a laser-less node that could allow massive integration in silicon-photonics, making reuse of the downstream wavelength for upstream transmission.
The simulation of current source modular multilevel converter (CSMMC) based systems with large number of submodules require significant computational efforts. In this paper, a simplified model of CSMMC is developed to reduce the computational complexity while maintaining the accuracy of the traditional detailed model. The model is constituted using controlled current sources in each arm of the converter...
This paper aims at minimizing the cost of transponder pool for dynamic Wavelength on Demand (WoD) services. Combinations of fixed-rate and variable-rate transponders, cost ratios, line rates of WoD requests, and arrival rates are investigated.
The Power Amplifier (PA) is a Radio Frequency (RF) circuit and its main goal is to drive the transmitter's (Tx) antenna. It faces a trade-off between spectral efficiency and power saving. Digital Cartesian Feedback (CFB) presents itself as a good linearization system when using narrowband signals in portable or mobile devices. This work starts with the validation of a digital CFB linearization system...
This paper proposes a lightpath threshold adaptation algorithm for dispersion-adaptive first-last fit spectrum allocation scheme in elastic optical networks in order to improve the performance in terms of call blocking in the network. The proposed algorithm adapts the suitable lightpath threshold value, denoted by β, according to the traffic condition in the network. The dispersion-adaptive first-last...
In this paper SIMSIDES-based (Simulink-based Sigma Delta Simulator) high level simulation of a 4th order Hybrid ΣΔ Modulator was carried out to find the performance requirements of several Analog Building Blocks (ABB). Once the requirements have been defined, the next step is to design each ABB at the transistor level. One of them, a fully differential OTA, was sized through a Design of Experiments...
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