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A new frequency estimator of sinusoid based on interpolated FFT amplitudes is proposed. The coarse frequency estimation is made by the position of the maximum DFT amplitude. Then the fine estimation is made by utilizing the amplitudes of two DFT coefficients. Simulation results show that the root mean square errors of frequency estimation of the proposed estimator and Fang's estimator are close to...
In this work we present a new room impulse response simulation for spherical microphone arrays taking into account source directivity. We calculate the emission angle of the sound ray leaving the source based on the location of the image and the receiver using Allen and Berkley's image method. We provide an implementation of a room impulse response simulator for a spherical microphone array including...
In this paper, we propose a passive phase-conjugation scheme which has a lower system complexity than that of the active time-reversal detection scheme. Moreover, the proposed scheme does not use an additional signal processing to estimate either the target or clutter response so that the target detection can be performed very simple. MATLAB simulations are provided to show the processed result.
Recently, tensor signal processing has received an increased attention, particularly in the context of wireless communication applications. The so-called PARAllel FACtor (PARAFAC) decomposition is certainly the most used tensor tool. In general, the parameter estimation of a PARAFAC decomposition is carried out by means of the iterative ALS algorithm, which exhibits the following main drawbacks: convergence...
In this paper, we evaluate privacy preservation capability of biometric hashing methods. Although there are some work on privacy evaluation of biometric template protection methods in the literature, they fail to cover all biometric template protection methods. To the best of our knowledge, there is no work on privacy metrics and assessment for biometric hashing methods. We use several metrics under...
The classification of different human activities with radar has been a widely researched topic in recent years. Oftentimes, when no experimental data is available, simulated data can be exploited to test classification algorithms. Kinematic models such as the Thalmann Model and motion capture (MOCAP) data are frequently used to simulate radar signatures of human movements. While the Thalmann Model...
This project aims at the design of new instrumentation techniques for studying the electrical properties of the cell as a means of better understanding the cellular transport processes. The approach is to integrate the concept of a lock-in amplifier on a single-electrode platform. Switching sinusoidal excitations can be used to assess small but measurable changes of cell capacitance, which can be...
The presence of numerous power electronics converters on embedded networks, originates EMC issues. EMC modeling of power electronic converters is tricky due to modeling complexity. Indeed, on one side, EMC study needs the finest characterization of each element, thus, only a few numbers of converters plugged to the network can be described. On the other hand, a conventional network approach, representing...
In this paper a new current comparator is proposed which offers high speed and high resolution while maintaining low power dissipation. The design improves upon previous Traff current comparator by modifying the given gain stage which leads to up to 83% improvement in delay. Simulation results performed on SPICE using TSMC 0.18µm CMOS technology demonstrate that proposed current comparator has a resolution...
A novel CMOS current mode analog multiplier is presented. The design is based on using MOSFET operating in subthreshold region to achieve ultra low power dissipation. The circuit is operated from ± 0.75V DC supply. The proposed circuit has been simulated using Tanner in 0.35µm TSMC CMOS process. Simulation results show that the total power dissipation is 2.3µW, total harmonic distortion is 0.7% ,...
Ultra-Wide band technology has attracted many scientists and engineers to work on different fields like telecommunications, satellite communications, indoor security and networking, intrusion detection, vehicle collision avoidance and short range radar systems. In this paper we propose a novel method to search and recognize a predefined object across the wall in an intricate environment of room by...
This paper deals with the problem of blind estimation of the spreading sequences in multi-rate direct-sequence code division multiple access(DS-CDMA). The characteristic of the down-link Multi-Rate DS/CDMA signal is analyzed, and the down-link Multi-Rate DS/CDMA signal is modeled as the blind source separation pattern at first. Then an efficient iterative dimension-increased method based Fast-ICA...
This paper introduces a power efficient approach for improving reliability of heterogeneous register files in embedded processors. The approach is based on the fact that control applications have high demands in reliability, while many special-purpose register are unused in a considerable portion of execution. The paper proposes a static application binary analysis which is applied at function-level...
In this paper a 4-bit algorithmic current mode Analog-to-Digital Converter (ADC) has been implemented. A vital component of this ADC is a current comparator. We have simulated three popular structures of current comparators that can be used to implement this ADC and compared their performance. The circuit has been implemented using 0.18 µm CMOS technology with a supply voltage of 1.8V.
In high voltage testing the residual inductance of the test circuit or the stray capacitance of the test subject disturbs the standard lightning impulse with superimposed overshoot or oscillations on the front or tail of the waveform. This paper presents a new technique based on ESPRIT method for estimating the mean curve of HV lightning and switching impulse waveforms required by IEC 60 and IEEE...
Presented in this paper is a method for following a moving target with a mobile platform derived from a vector field navigation algorithm. A navigation method that took the position and heading of a waypoint as its defining parameters was modified to suit the needs of creating a target following algorithm. This algorithm will be shown to successfully be able to control a vehicle to follow a known...
Recently the use of non-negative matrix factorization (NMF) for music onset detection has been proposed. In this paper we present the results of an experimental evaluation of NMF for onset detection of piano music. The test results, concerning a publicly available dataset of piano music, show a good performance of NMF, almost invariant from the factorization rank. However, better results have been...
Linear Frequency Modulation (LFM) signal is an important signal format in radar signal processing field. Aimed at the characters of radar LFM signal, the B-distribution analysis method can be applied to descript it in this paper. On the basis of that, the Erosion transform can be utilized to highlight the characters of radar LFM signal, and Hough transform is employed to extract LFM signal parameter...
Thermocouple sensor for temperature measurement has been widely used, however, the increase of precision is constrained due to the shortcoming of hardware based or table look up method, especially with nonlinear adjustment and cold end compensation. A new method was presented to compensate nonlinearity and cold-side-offset for signal processing of thermocouple with RBF neural networks. The structure...
The purpose of this paper is to develop parameter transformation strategies that improve the accuracy of the Variational Bayes (VB) approximation. The idea is to find a transformed metric in which coupling between parameters is reduced. Parameter orthogonalization methods from the statistical literature provide a starting point, but these are extended in the paper to yield transformed distributions...
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