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This paper shows the results of the joint implementation of a Fading Mitigation Technique and a semi-blind Channel Estimation when performing a wireless link with characteristics of fourth generation. The results give a benefit in the bit error rate and the maximum data rate when the system operates adaptively according to fading introduced by the channel. The Fading Mitigation Technique used in this...
As a scan-based testing enables higher test coverage and faster test time than alternative ways, it is widely used by most system-on-chip (SoC) designers. However, since the number of logic gates is over one hundred million gates, a number of scan cells lead to excessive power consumption and it produces a low shifting frequency during the scan shifting mode. In this paper, we present a new scan shift...
The linear quadratic optimal control problem with finite final time and fixed end-point for discrete linear time invariant systems is presented. The study takes into account the influence of the time variant perturbations in optimal control law implementation. The applicability of the proposed algorithm is validated by simulation tests.
In which way may an application switch instantly and reliably between an indoor and an outdoor positioning provider as a user enters and exits buildings? In this work we present a robust switching algorithm, utilizing the dynamic accuracy estimation of each position provider as a reliability indication. Our algorithm offers a fast automatic switch between the indoor and the outdoor provider, in a...
HTTP streaming has become a cost effective means for video delivery nowadays. To enable adaptivity to networks and terminals, a provider should generate multiple representations of an original video as well as the related signaling metadata. So far, most previous studies have just focused on the case of CBR (constant bitrate) video. In this paper, we propose a novel adaptation method for VBR (variable...
Energy companies today increasingly look offshore and head towards deeper waters to assist fueling modern society. Semisubmersibles and drill-ships are often used to prospect and produce in remote environments. The oil rigs should be essentially kept on target. In this paper, the authors solve the problem of designing a Position Mooring (PM) system for barge ship. A mathematical model of a system...
Since the amount of switching states is up to 32, if the conventional model predictive control (MPC) techniques is applied to the five-leg inverter, there are a huge calculation, which cannot be realized by using the modern digital signal processor. In this paper, a restrained search predictive control (RSPC) method is proposed. The limit of switching action times during the transactions between switch...
The modular multilevel converter (MMC) is the most promising solution to connect HVDC grids to an HVAC one. The installation of new equipment in the HVDC transmission systems requires an economic study where the power losses play an important role. Since the MMC is composed of a high number of semiconductors elements, the losses estimation becomes complex. This paper proposes a simulation-based method...
This paper presents a rotor position estimator based on a newly defined fictitious induced EMF for an interior permanent-magnet synchronous motor (IPMSM). The fictitious EMF is calculated easily from the stator voltage and current with its phase aligns with the rotor position. The rotor position and speed are extracted by a vector phase-locked loop. Global stability of the estimation is proven without...
In this paper, we present a method for the optimal state estimation of a linear system, observed by various dynamically schedulable and distributed sensors. We consider this problem to be a problem of information fusion, where the information is obtained from the sensors in exchange of scheduling and sensor operational costs. Sensors over a distributed network can work together efficiently in order...
This paper presents a finite control set Model Predictive Control (FS-MPC) approach for a grid-connected converter, particularly suitable for non-stiff grids where under low Short Circuit Ratio (SCR) the performance of the controller may get affected by variations in supply impedance value. In order to avoid this problem, a novel supply inductance estimator that is based on the grid currents variations...
This paper introduces a new perspective of using boundary control with second-order switching surface to decouple the LCL filter into an “LC” + L structure to control the output current of a grid-connected inverter. The boundary control (inner loop) converts the switching network together with the “LC” filter into a first-order delay term. Then, the deadbeat control (outer loop) deals with the low-order...
A new ultracapacitor-battery HESS based on bidirectional Z-Source topology is proposed in previous research for better energy and space utilization. By controlling the power of UCs and machine, the steady average battery current get controlled indirectly. However, for safety consideration, the dynamic performance of proposed HESS should be considered, so small signal model based on state-space average...
A three-port DC/DC converter (TPC) having DC48V and DC12V ports, and an isolated DC port is designed and analyzed. The newly designed TPC integrates a non-isolated bi-directional DC-DC (NBC) converter and an isolated dual-active-bridge (DAB) converter using a coupling inductor technique, and DC power can be delivered multi-directionally among three DC ports. In the present study, a loss estimation...
This paper proposes a direct rotor-position estimation method for IPMSMs (Interior Permanent Magnet Synchronous Motors) in low-speed regions including standstill. Proposed estimation method does not require phase-locked-loop (PLL) which degrade the response of position estimation and it can improve the response of position estimation.
This paper presents a Digital Predictive Peak Current Mode controller which uses inductor inductance estimation to estimate the inductor current slopes and to predict the inductor current in both discontinuous and continuous conduction mode. The estimated current slopes are used for controlling the current loop. The proposed controller is implemented in a Field Programmable Gate Array (FPGA) to control...
In this paper we present a novel Direction of Arrival (DoA) estimator for Switched Beam Antennas (SBA). The proposed approach is based on the best analytic approximation of the power pattern ratio between adjacent beams.
This paper presents a 5GS/s 12-way 10b time-interleaved SAR ADC. Each SAR sub-ADC resolves 11b using reduced radix-2 with 1b redundancy, which tolerates decision errors arising from noise, reference settling error, etc. The top-plate sampling with merged capacitor switching algorithm is applied to achieve high switching efficiency, small area and less comparator noise. Several design techniques for...
The paper deals with estimation of a mixture of normal and exponential distributions with the dynamic model of their switching. A separate estimation of normal or exponential mixtures is solved by various approaches in many papers over the world. However, in some application areas, data are of such a nature that they should be described by a combination of exponential and normal models. The paper...
A switched-compensation technique (SCT) is proposed for switched-capacitor circuit applications to provide fast settling performance while reducing the quiescent power consumption. The SCT can be easily implemented into flip-around switched-capacitor amplifier in which the settling time requirement is a critical index of performance. Simulation results based on a 0.13µm CMOS process are presented...
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