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This paper presents the theoretical analysis and experimental results of frequency modulation (FM) due to the electromagnetic interference (EMI) to the voltage-controlled oscillators (VCO). Physical models of the oscillator core and injected signals are implemented to precisely predict the EMI. A low frequency continuous wave is injected into a 900 MHz monolithic LC-VCO, which is implemented on a...
We developed high-speed III-V devices for millimeter-wave receiver applications as InP-based high electron mobility transistors (HEMTs) that had a cavity structure and zero-bias GaAsSb-based heterojunction backward diodes. A high cutoff frequency fT) of 517 GHz and minimum noise figure (NFmin) of 0.71 dB at 94 GHz were achieved for the InP-based HEMTs, even after the passivation process, by adopting...
The sensitivity of dual reflector antennas can be improved by shaping the reflector system to use the aperture more efficiently. This paper explains the process to derive an optimum shaped offset Gregorian system for a given suite of single pixel feeds. The feeds are those that were optimized for a geometrically similar unshaped reflector system.
Selected results of the optics analysis of the proposed offset Gregorian reflector with Phased Array Feed (PAF) are presented. The approach used to analyze the phased array feed with the Gregorian reflector is described.
The paper is concerned with state predictors that include a disturbance dynamics capable of estimating the disturbance to be rejected. The disturbance dynamics is driven by an unknown input signal, the uncertainty input, which is the output of a dynamic feedback driven by the model error (plant minus model output). As an extension of classical observers, the paper shows the advantage of designing...
Consider a set of agents implementing the discrete time consensus algorithm. At each time step, all agents also transmit their states to a central estimator that wishes to identify the underlying topology and eigenvalues of the network. It does so by using a nonlinear least squares (NLS) algorithm to identify the state evolution matrix used in the consensus algorithm. We present a mechanism to protect...
In this paper we describe the design, implementation and results of multi degree of freedom (DOF) active vibration control for a Coriolis mass-flow meter (CMFM). Without vibration control, environmental vibrational disturbances results in nanometre movement of the fluid-conveying tube which causes erroneous mass-flow measurements. In order to reduce the transmissibility from external vibrations to...
The Generalized Proportional Integral Observer (GPIO), which is a generalized high order Extended State Observer (ESO), has drawn much attention from both the industry and academia recently. This paper explores the characteristics of GPIO for the linear, time-invariant (LTI) plants using the frequency response method. It shows that the high order GPIO not only estimates the total disturbance and its...
We study the statistical characteristics of radio environment noise, in particular focusing on spurious received power arising from adjacent channel interference, harmonics and wideband man-made interference. Unlike the majority of existing studies, our measurements enable a comprehensive study on frequencies ranging from 80MHz to 2.64 GHz instead of being focused on the properties of an application-specific...
Contour-based Fourier descriptors are very simple and effective shape description method used for content-based image retrieval. Similarity between Fourier descriptors is usually computed using measures such as City-block or Euclidean distance. These similarity measures consider all harmonics to be equally important, therefore harmonics with larger magnitude tend to have larger significance during...
A 410-GHz imager consisting of a 4th sub-harmonic mixer formed with an anti-parallel diode-connected NMOS transistor pair, and an on-chip antenna with 4.4-dB simulated gain is demonstrated in 65-nm CMOS. At −1.6-dBm power delivered to the LO input bond pad, the imager achieves 16.8-dB voltage conversion loss and 34.1-dB DSB noise figure. When the noise bandwidth is 1 kHz, sensitivity is −110 dBm,...
A controller design method for constant value control systems has been proposed. The method requires only one-shot experimental data which is obtained from the stabilized closed-loop system when a known zero-mean noise is applied to the output of the plant. The data is used to estimate the plant model by the least square method. The controller is tuned by specifying the stable margin in consideration...
The paper describes methodology for modelling and simulative estimation of sensitivity and range of ISM band Remote Keyless Entry transmitter-receiver system for automotive applications. The method is based on electrical simulation including PCB extraction data and parameters statistical distribution to evaluate best- and worst case scenarios. Both transmitter and receiver circuits are considered,...
Vertical Hall-effect devices (VHDs) are CMOS integrated sensors dedicated to the measurement of magnetic field in the plane of the chip. At low frequency performances are severely reduced by the 1/f noise. We recently proposed a theoretical study which confirm the capability of the spinning current technique to lower the 1/f noise on Low-Voltage VHD. In this paper, we proposed a practical way for...
Non-independent reasoning (NIR) refers to learning the information of one record from other records, under the assumption that these records share the same underlying distribution. Accurate NIR could disclose private information of an individual. An important assumption made by differential privacy is that NIR is considered to be non-violation of privacy. In this work, we investigate the extent to...
The authors present an implementation technique of a novel system which can be used to perform 3-D filtering for separable kernels. The structure, consisting of Givens rotations and delay elements, is implemented in FPGA chip. Givens rotations are based on a pipeline CORDIC algorithm. Presented approach is tested against finite precision noise and sensitivity to structure parameters. It is shown that...
A linear response single exposure CMOS image sensor approaching to the photon countable sensitivity and a high full well capacity (FWC) is developed using lateral overflow integration capacitor (LOFIC) architecture with dual gain column amplifiers, small floating diffusion (FD) capacitance (CFD) and low noise in-pixel source follower (SF) signal readout technologies. The fabricated 5.5 μm pitch 360...
A novel pixel architecture is presented to be part of a pH-based DNA microarray using ISFETs as chemical sensors. The design, based on APS architectures, performs pulse width modulation to encode the pH in time. It allows compensation for a major ISFET nonideality, offset in the threshold voltage, which is caused by trapped charge on the floating gate and the passivation layer of the ISFET. Also,...
Human action representation, recognition and learning is of importance to guarantee a fruitful human-robot cooperation. In this paper, we propose a novel coordinate-free, scale invariant representation of 6D (position and orientation) motion trajectories. The advantages of the proposed invariant representation are twofold. First the performance of gesture recognition can be improved thanks to its...
MI sensor is a magnetic sensor based on the Magneto Impedance (MI) effect discovered by Mori et al. in 1993[1]. A small and highly sensitive magnetic sensor (AMI 306) based on above MI effect and used as an electromagnetic compass mainly in mobile phones and smart phones has been developed and commercialized by AICHI MICRO INTELLIGENT[2]. According to theoretical analysis, the MI sensor is foreseen...
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