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In this paper, a novel structure is derived for digital filter which is robust against the FWL errors. This structure, denoted as SIMP, is actually an improved version of the one reported in the work of Li et al. (2000) in terms of implementation efficiency and reducing quantization errors. The expression of transfer function sensitivity measure is derived for each structure. Two numerical examples...
A design method of a second-order adaptive-bandwidth all-digital phase-locked loop (ADB-ADPLL) is developed. Based on a discrete-time analogy of a continuous-time PLL (CTPLL) with the z-transform, the design criterion of the ADB-ADPLL is derived. With an ADB-ADPLL, the loop bandwidth and lock-in time are balanced. According to the design criterion, the ratio of the loop noise bandwidth to the reference...
The aim of this paper is to extend linear quantum dynamical network theory to include static Bogoliubov components (such as squeezers). Within this integrated quantum network theory we provide general methods for cascade or series connections, as well as feedback interconnections using linear fractional transformations. In addition, we define input-output maps and transfer functions in this quantum...
In order to solve the difficult problem that how to reduce the overshot and shorten the regulating time of the PID controller based on BP neural network, a self-tuning PID controller based on improved BP neural network is presented. The parameters of the PID controller are calculated by an improved BP Neural Network according to the input and output and the error of the PID controller. It is introduced...
This paper investigates the application of dynamic, integral non-linearity (INL) model of analog-to-digital converters (ADC) to predict the harmonic distortion in pipelined ADCs. The device used to validate the model is Texas Instruments' ADS6129; a 12-bit, 250 MSPS1 pipelined ADC. The performance of the model is measured using single tones in the first Nyquist zone, with an amplitude ranging between...
This paper addresses identification of Hammerstein systems using the sampled input-output data in frequency domain. When the static memoryless nonlinear part of Hammerstein model can be considered as a polynomial with a known order, the following linear part can be estimated as a multi-input single-output (MISO) systems with the numerical algorithm for subspace state space system identification method...
New results about the pre-filter and the post-filter in timing recovery based on square-law detection are presented. Specifically, in the paper a matched-filter-type condition that guarantees optimality of the pre-filter against channel noise is derived. This condition can be satisfied together with the known condition for self-noise elimination, thus achieving optimality against self-noise and against...
An adaptive on-line scheme is designed to identify the uncertain and time-varying resonance modes in hard disk drive servo systems. Based on the identified results, the uncertain resonance mode is extracted and a peak filter is designed accordingly to provide stronger capability of disturbance suppression. The scheme does not require any extra excitation signal nor additional signal processing for...
This paper derives state-space models for multirate multi-input sampled-data systems. Based on the corresponding transfer function models, an auxiliary model based recursive least squares algorithm is presented to identify the model parameters of the multirate systems from the multirate input-output data. Further, convergence properties of the proposed algorithm are analyzed. An illustrative example...
A new technique for designing (i.e. tuning) PID controllers based on Laguerre series representations of the plant model and the desired response is presented. The technique allows tradeoffs between response matching, noise/disturbance rejection, and economic operation.
A new adaptive active control strategy with online secondary path modeling is proposed and applied in two-stage active vibration isolation system. Compared with existing algorithms, the proposed method doesn't need feeding extra noise to the secondary source. Instead, the facts that the FIR filters have coefficient vectors equivalent to impulse responses corresponding to the transfer functions of...
Sigma-delta modulators are becoming increasingly more popular in electronic circuits since they make optimal use of the high-speed capabilities of novel technologies. Such SigmaDelta-modulators can be characterized via their signal and noise transfer function. These transfer functions are primarily used during the design of the modulators and hence, their pole/zero locations give valuable information...
The design of a quadrature bandpass sigma-delta (SigmaDelta) ADC build by cascading two complex modulator is presented. The utilization of cascading enables the independent control of zeros of the noise transfer function. Design method and simulation results including errors due to non-idealities as well as limits of a fourth order scheme are presented. The flexibility of placing notches at critical...
We analyze and present an input gain-varying scheme for maximizing dynamic range in a well-known Gm-C bandpass filter by both minimizing noise for small input signals, and by achieving balanced swing levels at all filter nodes for large input signals. A micropower bandpass filter suitable for use in cochlear implants and other power-constrained biomedical applications was implemented and tested in...
This paper deals with discrete-time multivariable feedback systems that are subject to sensor time delays. Supposing a controller exists that provides good performance without sensor delays, we consider how an estimator can be used to recover closed-loop performance when sensor time delays are introduced into the feedback loop. Using separation principle arguments, we first show that stability and...
This paper handles the supervised equalization of a single input single output (SISO) linear communication channel. The proposed equalizer is built on generalized orthogonal basis (GOB). The yielded equalizer called generalized orthogonal basis equalizer is tested on simulation for a linear numerical communication channel described by a transfer function and the GOB equalizer is tested in simulation...
It is well known that plants with dead-time are difficult to be controlled by using traditional control method. For this, controller with dead-time have been proposed for the systems with dead-time, e.g. internal model control (IMC), Smith-method. However, it would be difficult to realize the dead-time component of controller because of memory limit of micro control unit (MCU). The sampling time might...
This paper deals with design of the novel architecture of the CNN (cellular neural network) for image processing. The main parameters were speed and area of the chip. Digital CNN network contains a lot of gates, which occupies a lot of area on chip. The most area on chip occupy multipliers, therefore we proposed CNN network, where multiplication of the input with weight is realized by block AND, while...
This paper presents the 2-stage identification approach. The first stage is the identification of the system step response from the experimental data using the frequency sampling filter approach. This first stage is also referred as data compression stage in which the raw data will be analyzed in order to obtain a parameter that describes the empirical model of the analyzed data. The second stage...
Simultaneous switching noise (SSN) is an important issue for the design and test and actual ICs. In particular, SSN that originates from the internal logic circuitry becomes a serious problem as the speed and density of the internal circuit increase. In this paper, an on-chip monitor is proposed to detect potential logic errors in digital circuits due to the presence of SSN. This monitor checks the...
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