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检索条件"任意字段=Advanced Signal Processing Algorithms, Architectures, and Implementations XVI"

共 420 条记录，以下是311-320 订阅

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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...

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

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

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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...

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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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HIGHER-ORDER WIGNER DISTRIBUTIONS

HIGHER-ORDER WIGNER DISTRIBUTIONS

引用

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

作者： SWAMI, A Unocal Corp. (United States)

ISBN: (纸本)081940943X

Higher-order Wigner distributions are not unique: definitions differ in the lag separations between the terms used in the time-domain product, as well as in how many of the terms are conjugated. We study a class of third-order WDs (TWD), parameterized by a single parameter (alpha) , and show that there is a duality between the choices of (alpha) equals -1/3 (Gerr's definition) and (alpha) equals -1. Interesting signal attributes, such as the instantaneous frequency, the derivative of the log-magnitude, and the group delay can be recovered from the TWD. Important issues such as aliasing problems and sampling requirements, and whether or not the analytic form of a real signal should be used, are addressed. It is shown theoretically that the TWD with (alpha) equals -1 is particularly useful for the detection of transients in the presence of colored Gaussian noise.

关键词： signal processing Interference (communication) signal detection signal analyzers Time-frequency analysis Fourier transforms Beryllium Smoothing Chromium Digital signal processing

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DIRECTION FINDING USING ESPRIT WITH ARRAY MANIFOLD INTERPOLATION

DIRECTION FINDING USING ESPRIT WITH ARRAY MANIFOLD INTERPOLA...

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

作者： HUNG, HS WHU, KR Iowa State Univ. (United States)

ISBN: (纸本)081940943X

A direction-finding algorithm employing the technique of array manifold interpolation is proposed for the estimation of directions-of-arrival of multiple narrow-band sources. The algorithm is formulated by applying array manifold interpolation to an ESPRIT-type method. As a result, a virtual array can be interpolated from the data collected from a real array, thereby eliminating the need for two identical arrays as in ESPRIT. Moreover, only a single interpolation matrix for the entire field-of-view is required, thus significantly reducing the computational load of the sector-divided interpolation scheme. Simulation results are provided to show the effectiveness of the proposed algorithm.

关键词： Sensors signal to noise ratio Interference (communication) Data modeling signal processing Statistical analysis algorithms Bessel functions Computer simulations Wave propagation

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ANALYSIS OF A LINEARLY CONSTRAINED LEAST-SQUARES ALGORITHM FOR ADAPTIVE BEAMFORMING

ANALYSIS OF A LINEARLY CONSTRAINED LEAST-SQUARES ALGORITHM F...

引用

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

作者： LUK, FT QIAO, SZ Rensselaer Polytechnic Institute (United States) McMaster Univ. (Canada)

ISBN: (纸本)081940943X

The problem of linearly constrained least squares has many applications in signal processing. In this paper, we present a perturbation analysis of a novel, linearly constrained least squares algorithm for adaptive beamforming. The perturbation bounds for the solution as well as for the latest residual element are derived. We also propose an error estimation scheme for the residual element. This error estimation scheme can be incorporated into a systolic array implementation of the algorithm. The additional time required for error estimation is small, as we show how the processor idle time can be used to carry out almost all the calculations.

关键词： Error analysis Chemical elements Analytical research Silicon Evolutionary algorithms signal processing Condition numbers Einsteinium Information operations Matrices

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