A number of different digital signal-processingalgorithms for electric power system data acquisition, control and protection were previously introduced. Each of the algorithms was defined based on the specific applic...
详细信息
A number of different digital signal-processingalgorithms for electric power system data acquisition, control and protection were previously introduced. Each of the algorithms was defined based on the specific application, utilizing either some heuristic approaches or known systems identification and parameter-estimation techniques. A generalized methodology for algorithm synthesis which may be used in a number of different applications is proposed, based on the bilinear form approach.< >
This work features a stochastic perturbation theoretic approach that can be used to calculate the performance analyses of array signal processing algorithms for the nonasymptotically large, moderate data regimes that ...
详细信息
This work features a stochastic perturbation theoretic approach that can be used to calculate the performance analyses of array signal processing algorithms for the nonasymptotically large, moderate data regimes that are appropriate for many practical system applications. As an example, the perturbation method is used to develop the expressions for the moments of the MUSIC null spectrum at moderate SNR for independent data snapshot numbers as low as approximately 5. Theoretical predictions are shown to be in good agreement with empirical statistical simulation results.
Universal spectral analyzers of physicochemical composition and properties of materials (chromatographs, mass- and optical spectrometers, etc.) typically require complex processing of detector signals in order to obta...
详细信息
Universal spectral analyzers of physicochemical composition and properties of materials (chromatographs, mass- and optical spectrometers, etc.) typically require complex processing of detector signals in order to obtain the results. The processing in most cases is performed by a digital computer system. The analytical data processingalgorithms with required characteristics are assembled from algorithmic modules, which must pass preliminary certification. The algorithm performance can be evaluated by analytical methods, but this usually involves considerable simplifications and restrictive assumptions, and thus often leads to inaccurate results. Correct results can be obtained by simulation methods. It is advisable to use a mixed strategy for evaluating the algorithm performance.
Adaptive signal processing algorithms are often used in order to "track" an unknown time-varying parameter vector. This work develops an upper bound on the mean of the norm-squared error between the unknown ...
详细信息
Adaptive signal processing algorithms are often used in order to "track" an unknown time-varying parameter vector. This work develops an upper bound on the mean of the norm-squared error between the unknown parameter vector being tracked and the value obtained by the algorithm. The results require very mild covariance decay rate conditions on the training data and a bounded algorithm. The upper bound illustrates the relationship between the algorithm step size and the maximum rate of variation in the parameter vector being tracked.
An innovative approach is being used to implement and simulate the infrared (IR) and laser radar signal processing algorithms for the Advanced Sensor Technology Program (ASTP) and the Discrimination Interceptor Techno...
详细信息
ISBN:
(纸本)0819428221
An innovative approach is being used to implement and simulate the infrared (IR) and laser radar signal processing algorithms for the Advanced Sensor Technology Program (ASTP) and the Discrimination Interceptor Technology Program (DITP). Although the algorithms will run on four different computer architectures, they will use the same source code for all implementations. The initial development and testing will occur in Mathcad on a Windows 95/NT personal computer, then move to simulation on a Silicon Graphics (SGI) workstation, then to scaled real-time simulation on a parallel high performance computer (HPC), and finally to the actual flight processor, the miniaturized parallel Wafer Scale signal Processor (WSSP) with a MIMD (multiple-instruction and multiple data) architecture. This flexibility is accomplished with code wrappers that implement interchangeable interface layers for the code modules, one wrapper for Mathcad matrices, one for C++ objects on the workstation, one for message passing with static routing on the HPC, and one for dynamically routed message passing on the WSSP. With this approach, developers can move modules back and forth from the workstation simulation environment to the implementation hardware. This will eliminate the need to maintain different versions of the same algorithm. The signal processing algorithms will be modified to work in a massively parallel architecture, with a message passing interface, which is simulated on the Silicon Graphics workstation, emulated on the HPC, and implemented on the WSSP. This approach will allow for pipeline processing as well as multiple, concurrently running instances of modules. In addition, innovative algorithms will fuse active laser radar detections and passive multicolor IR sensor measurements to improve target state estimation.
It is proposed to develop a quasi-optimal RF-pulse signal receiver algorithm based on Markov theory of nonlinear filtering. Evaluating the synthesized algorithm efficiency is founded on a semi-natural experiment of pr...
详细信息
ISBN:
(纸本)9781509020287
It is proposed to develop a quasi-optimal RF-pulse signal receiver algorithm based on Markov theory of nonlinear filtering. Evaluating the synthesized algorithm efficiency is founded on a semi-natural experiment of processing the signal mixed with Johnson or white Gaussian noises. The developed algorithm has been simulated in Simulink MatLab. The experiment was implemented on the installation of the wireless communication National Instruments PXIe-1075. The gain in the signal to noise ratio of the nonlinear Markov filtering algorithm compared with the adaptive algorithm is from 2 to 5 dB for white Gaussian noise and various Johnson noises for correct reception error probability equaled to 0.1. The S-L Johnson noise has the best masking effect, and the S-B Johnson noise has the worst one.
Smart clothes increase the efficiency of long-term noninvasive monitoring systems by facilitating the placement of sensors and increasing the number of measurement locations. Since the sensors are either garment-integ...
详细信息
ISBN:
(纸本)0769525474
Smart clothes increase the efficiency of long-term noninvasive monitoring systems by facilitating the placement of sensors and increasing the number of measurement locations. Since the sensors are either garment-integrated or embedded in an unobtrusive way in the garment, the impact on the subject's comfort is minimized. However the main challenge of smart clothing lies in the enhancement of signal quality and the management of the huge data volume resulting from the variable contact with the skin, movement artifacts, non-accurate location of sensors and the large number of acquired signals. This paper exposes the strategies and solutions adopted in the European IST project MyHeart to address these problems, from the definition of the body sensor network to the description of two embedded signalprocessing techniques performing on-body ECG enhancement and motion activity classification.
Portable systems today are designed with lowering the energy consumption as the primary design metric. This is unfortunate since maximizing battery lifetime is. a more appropriate metric, and lowering energy does not ...
详细信息
ISBN:
(纸本)0780377958
Portable systems today are designed with lowering the energy consumption as the primary design metric. This is unfortunate since maximizing battery lifetime is. a more appropriate metric, and lowering energy does not necessarily mean improving battery lifetime. In this paper we first show how to design battery-friendly implementations of common signalprocessing kernels such as FIR filters and FFT. The basic idea is to generate a load profile that results in better battery behavior. Next, we demonstrate how frequency scaling can be used effectively to improve the battery behavior of an application such as MPEG2.
In this paper, we explore the use of multi-stage adaptation algorithms for a variety of adaptive filtering applications where the structure of the underlying process to be estimated is unknown. These algorithms are &q...
详细信息
ISBN:
(纸本)0780363396
In this paper, we explore the use of multi-stage adaptation algorithms for a variety of adaptive filtering applications where the structure of the underlying process to be estimated is unknown. These algorithms are "multi-stage" in that they comprise multiple adaptive filtering algorithms that operate in parallel on the observation sequence, and adaptively combine the outputs of this first stage to form an overall signal estimate. Several examples of this class of algorithms are demonstrated and analyzed in both a deterministic and stochastic context with respect to their convergence and mean squared error. The first example of this class, a "universal" linear predictor, was recently introduced and shown to asymptotically achieve the performance of the best linear predictor for each sequence, (up to some maximal order). Two new algorithms have been developed that generalize this universal linear predictor, and explore the use of the LMS algorithm in each stage of adaptation. Each of these algorithms are compared through theoretical analysis of their behavior.
This paper introduces TINA, a novel framework for implementing non Neural Network (NN) signal processing algorithms on NN accelerators such as GPUs, TPUs or FPGAs. The key to this approach is the concept of mapping ma...
详细信息
ISBN:
(纸本)9798350372267;9798350372250
This paper introduces TINA, a novel framework for implementing non Neural Network (NN) signal processing algorithms on NN accelerators such as GPUs, TPUs or FPGAs. The key to this approach is the concept of mapping mathematical and logic functions as a series of convolutional and fully connected layers. By mapping functions into such a small sub stack of NN layers, it becomes possible to execute non-NN algorithms on NN hardware (HW) accelerators efficiently, as well as to ensure the portability of TINA implementations to any platform that supports such NN accelerators. Results show that TINA is highly competitive vs alternative frameworks, specifically for complex functions with iterations. For a Polyphase Filter Bank use case TINA shows GPU speedups of up to 80x vs a CPU baseline with NumPy compared to 8x speedup achieved by alternative frameworks. The framework is open source and publicly available at https://***/ChristiaanBoe/TINA.
暂无评论