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NETWORKS FOR MODELING AND signal-processing

NETWORKS FOR MODELING AND SIGNAL-PROCESSING

引用

CONF ON advanced signal processing algorithms, architectures, AND implementations 3

作者： YOU, YL xU, WY GORYN, D KAVEH, M Univ. of Minnesota (United States) Siemens AG (Germany)

ISBN: (纸本)081940943X

This paper presents modifications of the continuous Hopfield and Hartline-Ratliff networks for use in signal restoration and parameter estimation. The particular parameter estimation problem of interest is concerned with the estimation of the directions of arrival of an unknown number of plane waves in unknown noise. Restoration of linearly distorted noisy images is considered as an example of regularized restoration of a signal with known dynamic range.

关键词： Neurons signal to noise ratio Neural networks Image restoration signal processing Sensors Binary data Computer programming Control systems Phased arrays

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IMPLEMENTATION OF ADAPTIVE BEAMFORMING algorithms ON PARALLEL processing DSP NETWORKS

IMPLEMENTATION OF ADAPTIVE BEAMFORMING ALGORITHMS ON PARALLE...

引用

CONF ON advanced signal processing algorithms, architectures, AND implementations 3

作者： BANERJEE, S CHAU, PM Univ. of California/San Diego (United States)

ISBN: (纸本)081940943X

In this paper we address the problem of implementing a Least Squares problem, like that arising in the adaptive beamforming case, on a multiprocessor network comprising of general purpose DSP processors. Although optimal array processors have been proposed for this problem, an implementation on a generalized network is a flexible and more modular and reconfigurable solution, suited for a highly dynamic environment with changing applications and problem sizes. The parallelization issues have been explored and a scheme for an efficient implementation has been described.

关键词： Digital signal processing Data communications Array processing Telecommunications Matrices Chromium Data processing Parallel processing Phased arrays Sensors

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WIGNER HIGHER-ORDER MOMENT SPECTRA - A REVIEW

WIGNER HIGHER-ORDER MOMENT SPECTRA - A REVIEW

引用

CONF ON advanced signal processing algorithms, architectures, AND implementations 3

作者： FONOLLOSA, JR NIKIAS, CL Univ. of Southern California (United States)

ISBN: (纸本)081940943X

A general overview of the definition and properties of the recently defined Wigner higher order moment spectra (WHOS) is given in this paper. It is shown how the properties satisfied by WHOS are the extension of the well known properties of the Wigner-Ville distribution to a higher-order domain. In addition, a general class formulation, the discrete implementation, a comparison with a cumulant-based definition, the reduced interference condition, and tone application also are discussed.

关键词： Time-frequency analysis Fourier transforms signal analyzers Interference (communication) signal detection signal to noise ratio signal attenuation Multidimensional signal processing Image processing signal processing

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ALGORITHMIC ENGINEERING - A SIMPLIFIED DERIVATION OF THE ORTHOGONAL LEAST-SQUARES LATTICE

ALGORITHMIC ENGINEERING - A SIMPLIFIED DERIVATION OF THE ORT...

引用

CONF ON advanced signal processing algorithms, architectures, AND implementations 3

作者： PROUDLER, IK MCWHIRTER, JG Royal Signals and Radar Establishment (United Kingdom)

ISBN: (纸本)081940943X

Algorithmic engineering provides a rigorous framework for describing and manipulating the type of building blocks commonly used to define parallel algorithms and architectures for digital signal processing. So far, the concept has only been illustrated by means of some relatively simple examples. These relate to the use of QR decomposition by Givens rotations for the purposes of adaptive filtering and beamforming. In this paper we present a much more challenging example whereby the techniques of algorithmic engineering are used to derive the QRD-based lattice algorithm for multi-channel least squares linear prediction. The elegant simplicity of this derivation, which comprises a sequence of straightforward diagrammatic manipulations, serves to demonstrate the potential power of algorithmic engineering as a formal design technique.

关键词： signal processing Neptunium Algorithm development Array processing Digital signal processing Linear filtering Digital filtering Computer architecture Parallel processing Parallel computing

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SCHEDULING PARALLEL implementations OF PARTITIONED ORTHOGONAL TRANSFORMATIONS

SCHEDULING PARALLEL IMPLEMENTATIONS OF PARTITIONED ORTHOGONA...

引用

CONF ON advanced signal processing algorithms, architectures, AND implementations 3

作者： KUCHIBHOTLA, P RAO, BD Univ. of California/San Diego (United States)

ISBN: (纸本)081940943X

Orthogonal matrix transformations form an important part of matrix-based signal processing applications. Systolic arrays for computing these algorithms have been developed and the size of these arrays usually depends directly on the size of the problem. For large matrix sizes, implementing large numbers of processors in hardware is not physically feasible. In this paper, we examine two popular orthogonal transformations, Givens rotations and householder transformations (HT), from the viewpoint of realizing a fixed-size parallel processor array that can handle large data matrices. An efficient scheduling procedure is used to compute the HT on a systolic type array, its performance is compared with that of an array designed for computing the Givens method. An important conclusion resulting from the comparison is that the performance of the HT array is superior to that for the Givens method when the matrices are larger compared to the array size.

关键词： Silicon signal processing Algorithm development Matrices Parallel computing Array processing Data storage Electrochemical etching Filtering (signal processing) Lanthanum

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DETECTION AND CLASSIFICATION OF CYCLOSTATIONARY signalS VIA CYCLIC-HOS - A UNIFIED APPROACH

DETECTION AND CLASSIFICATION OF CYCLOSTATIONARY SIGNALS VIA ...

引用

CONF ON advanced signal processing algorithms, architectures, AND implementations 3

作者： DANDAWATE, AV GIANNAKIS, GB Univ. of Virginia (United States)

ISBN: (纸本)081940943X

Detection and classification of cyclostationary signals in noise of unknown distribution is addressed and novel tests for cyclostationarity are proposed. Both cases of known and unknown signal statistics are considered. The proposed approaches exploit the asymptotic normality of sample cyclic- cumulant and polyspectrum estimators for deriving asymptotically optimal x² tests. Simpler, but generally suboptimal versions are also presented. Simulations are performed to test the proposed algorithms and illustrate their insensitivity to any stationary noise as well as the ability of higher-than second-order schemes to suppress cyclostationary Gaussian interferences of unknown covariance.

关键词： signal detection Interference (communication) Error analysis signal processing Receivers signal to noise ratio Statistical analysis Detection and tracking algorithms Monte Carlo methods Sensors

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NRL FLEx radar signal-processing architecture: an update

NRL FLEX radar signal-processing architecture: an update

引用

advanced signal processing algorithms, architectures, and implementations III

作者： Alter, James J. Evins, James B. Popick, Glen L. Scott, Russell A. Letellier, J.P. Naval Research Lab. Washington DC USA

ISBN: (纸本)081940943X

The NRL FLEx processor architecture is designed for real-time radar signal processing and was described at last year's conference in the context of its original application, the Point Defense Demonstration Radar project at NRL. This paper describes the current status of the processor and the application of the same architecture to a new problem which requires a different board configuration to satisfy a different set of latency and data flow requirements.

关键词： Radar systems

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OVERVIEW OF SOME RECENT RESEARCH IN signal-processing FOR PERSONAL COMMUNICATION-NETWORKS

OVERVIEW OF SOME RECENT RESEARCH IN SIGNAL-PROCESSING FOR PE...

引用

CONF ON advanced signal processing algorithms, architectures, AND implementations 3

作者： MILSTEIN, LB Univ. of California/San Diego (United States)

ISBN: (纸本)081940943X

The use of wireless personal communication networks (PCN) to increase the capacity of cellular radio systems is a topic currently receiving much attention. In addition to the increase in capacity one achieves by going to a microcellular system, one can increase the spectral efficiency even further by allowing the PCN to overlay a frequency band which is already occupied with narrowband waveforms. Various signal processing techniques can be used advantageously in this regard, and such techniques are outlined below.

关键词： signal processing Digital filtering Receivers Linear filtering Microwave radiation Telecommunications Transmitters Interference (communication) RF communications Wireless communications

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OPTIMAL ARRAY signal-processing IN UNKNOWN NOISE ENVIRONMENTS VIA PARAMETRIC APPROACHES

OPTIMAL ARRAY SIGNAL-PROCESSING IN UNKNOWN NOISE ENVIRONMENT...

引用

CONF ON advanced signal processing algorithms, architectures, AND implementations 3

作者： WU, Q WONG, KM REILLY, JP McMaster Univ. (Canada)

ISBN: (纸本)081940943X

In this paper, under the assumption that noise correlation is spatially limited, using two separated arrays, we propose a new parametric approach for consistent directions of arrival (DOA) estimations in unknown noise environments. The theoretical performance analysis of the proposed DOA estimations is also presented. With the use of the theoretical performance, the best weighting matrices of the parametric criteria have been derived. More significantly, it has been shown that within the best weighted criteria, using canonical decomposition, we can achieve optimal performance of the DOA estimation among a large set of eigendecompositions.

关键词： Interference (communication) Matrices Sensors Autoregressive models Critical dimension metrology Array processing signal to noise ratio Data modeling Surface plasmons signal processing

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PERFORMANCE-MEASURES FOR COUPLED DIGITAL PHASE-LOCKED LOOPS FOR THE SEPARATION OF COCHANNNEL signalS

PERFORMANCE-MEASURES FOR COUPLED DIGITAL PHASE-LOCKED LOOPS ...

引用

CONF ON advanced signal processing algorithms, architectures, AND implementations 3

作者： HEDSTROM, BA KIRLIN, RL Univ. of Victoria (Canada)

ISBN: (纸本)081940943X

Coupled digital phase-locked loops (CDPLLs), derived from extended Kalman filter theory, have been shown to suppress adjacent and co-channel interferers. This paper addresses the ability of these CDPLLs to separate co-channel signals. State observability criteria are defined and examined for non-linear state observations which model phase modulation. These metrics can then be used to address signal separation and tracking behavior of CDPLLs.

关键词： Error analysis signal processing Receivers Modulation Phase modulation Phase shift keying Stochastic processes Analog electronics Filtering (signal processing) Digital filtering

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