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Proceedings of the Tenth IEEE Workshop on Statistical Signal and Array Processing (Cat. No.00TH8496)

16-16 Aug. 2000

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  • Proceedings Of The Tenth IEEE Workshop On Statistical Signal And Array Processing [front matter]

    Publication Year: 2000, Page(s):0_1 - ix
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    Freely Available from IEEE
  • Author index

    Publication Year: 2000, Page(s):737 - 739
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    Freely Available from IEEE
  • Subspace projection techniques for anti-FM jamming GPS receivers

    Publication Year: 2000, Page(s):529 - 533
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (364 KB)

    This paper applies subspace projection techniques as a pre-correlation signal processing method for the FM interference suppressions in GPS receivers. The FM jammers are instantaneous narrowband and have clear time-frequency (t-f) signatures that are distinct from the GPS C/A spread spectrum code. In the proposed technique, the instantaneous frequency (IF) of the jammer is estimated and used to co... View full abstract»

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  • Spatial and temporal processing of GPS signals

    Publication Year: 2000, Page(s):524 - 528
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (400 KB)

    In this paper we address the problem of navigation data demodulation by an adaptive GPS receiver that utilizes a bank of single-satellite linear-tap-delay filters and employs antenna-array reception. The presence of an antenna array allows the receiver to operate in the spatial domain in addition to the temporal (code) domain. We investigate disjoint-domain as well as joint-domain space-time GPS s... View full abstract»

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  • Jammer excision in spread spectrum using discrete evolutionary-Hough transform and singular value decomposition

    Publication Year: 2000, Page(s):519 - 523
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (340 KB)

    Jammer excision enhances interference immunity in direct sequence spread spectrum (DS-SS) communications. In this paper, we propose an excision procedure, based on the discrete evolutionary and Hough transforms, for jammers composed of arbitrary chirps. The proposed instantaneous frequency (IF) estimation is done locally, without parameters, and it is recursively corrected. A singular value decomp... View full abstract»

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  • GPS jammer suppression with low-sample support using reduced-rank power minimization

    Publication Year: 2000, Page(s):514 - 518
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB)

    When wideband and narrowband interferences in a GPS system are stationary, a large number of data samples may be obtained to get a good estimate of the interference. However, the jamming environment may be one in which the narrowband jammers have the ability to change frequencies dynamically or the rapid dynamics of the aircraft during maneuvering causes arrival angles of wideband jammers to chang... View full abstract»

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  • A neural network approach for DOA estimation and tracking

    Publication Year: 2000, Page(s):434 - 438
    Cited by:  Papers (8)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (292 KB)

    Many signal subspace-based approaches have been proposed for determining the fixed direction of arrival (DOA) of plane waves impinging on an array of sensors. However, the computational burden of subspace-based algorithms makes them unsuitable for real-time processing of nonstationary signal parameters. We present an iterative procedure for DOA estimation and tracking, The complete procedure consi... View full abstract»

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  • Nonlinear filtering algorithm with its application in INS alignment

    Publication Year: 2000, Page(s):510 - 513
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (168 KB)

    The application of optimal nonlinear/non-Gaussian filtering to the problem of inertial navigation system (INS) alignment is described. This approach is made possible by a new technique called particle filtering (PF). PF theory is introduced and nonlinear error equations of INS alignment on a stationary base in the case of large initial error angles are used. An algorithm for solving the problem of... View full abstract»

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  • Efficient signal detection in perturbed arrays

    Publication Year: 2000, Page(s):429 - 433
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (424 KB)

    The use of sensor arrays in signal processing applications has received considerable attention. Various array perturbations caused by phase, calibration, or modeling errors often cause the sensor observations to become only partially correlated, limiting the application of traditional matched-field beamformers. Quadratic array processing is optimal for many randomly perturbed array problems; howev... View full abstract»

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  • Estimating the parameters of multiple wideband chirp signals in sensor arrays

    Publication Year: 2000, Page(s):467 - 471
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (356 KB)

    The problem of estimating the parameters of multiple wideband polynomial-phase signal sources in sensor arrays is addressed. A new deterministic maximum likelihood (ML) direction of arrival (DOA) estimator and the respective Cramer-Rao bound (CRB) are presented for the general case of multiple constant-amplitude polynomial-phase sources. Since the proposed ML estimator is computationally intensive... View full abstract»

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  • Blind noise and channel estimation

    Publication Year: 2000, Page(s):141 - 145
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (428 KB)

    In the classical methods for blind channel identification (subspace method, TXK, XBM) (Moulines et al, 1995; Tong et al, 1994; Xavier et al, 1997), the additive noise is assumed to be spatially white or known to within a multiplicative scalar. When the noise is non-white (colored or correlated) but has a known covariance matrix, we can still handle the problem through prewhitening. However, there ... View full abstract»

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  • The numerical spread as a measure of non-stationarity: boundary effects in the numerical expected ambiguity function

    Publication Year: 2000, Page(s):252 - 256
    Cited by:  Papers (32)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    Establishing measures for local stationarity is an open problem in the field of time-frequency analysis. One promising theoretical measure, known as the spread, provides a means for quantifying potential correlation between signal elements. In previous papers we investigated the issue of implementing such a measure for discrete signals. The numerical spread was introduced as a means of applying an... View full abstract»

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  • Pulse propagation in dispersive media

    Publication Year: 2000, Page(s):485 - 489
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (228 KB)

    We give a simple formula for the calculation of the moments of a propagating pulse in a dispersive medium. Both the spatial and time moments are considered. Explicit formulas are derived for the spatial spreading of a propagating pulse and also for the duration of the pulse at a fixed position in space. In addition, we give formulas for the calculation of the instantaneous frequency of a pulse at ... View full abstract»

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  • Adaptive digital beamforming radar for monopulse angle estimation in jamming

    Publication Year: 2000, Page(s):272 - 275
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    This paper describes a digital beamforming architecture for nulling a mainlobe jammer and multiple sidelobe jammers while maintaining the monopulse angle estimation accuracy. It involves two-stage processing using adaptive digital beamforming followed by a mainlobe jammer canceller. A mainlobe jammer blocking matrix and constrained adaptation are employed during the adaptive sidelobe cancellation ... View full abstract»

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  • Parameter estimation in FARIMA processes with applications to network traffic modeling

    Publication Year: 2000, Page(s):505 - 509
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB)

    Traffic measurements in many network environments demonstrate the coexistence of both long- and short-range dependence in traffic traces. In this paper, we use the fractionally integrated autoregressive moving average (FARIMA) processes with non-Gaussian innovations to describe packet arrival rate in unit time. Specifically, we investigate cepstrum-based approaches for parameter estimation in FARI... View full abstract»

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  • Deterministic maximum likelihood DOA estimation in heterogeneous propagation media

    Publication Year: 2000, Page(s):424 - 428
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (364 KB)

    In a number of array signal processing applications, such as underwater source localization, the propagation medium is not homogeneous, which causes a distortion of the wavefront received by the array. In this paper, we consider the direction-of-arrival (DOA) estimation problem for such distorted wavefronts. In previous approaches, the so-called multiplicative noise scenario is considered based on... View full abstract»

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  • Analysis of radar micro-Doppler with time-frequency transform

    Publication Year: 2000, Page(s):463 - 466
    Cited by:  Papers (86)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (292 KB)

    Micro-Doppler induced by mechanical vibration or rotation of structures in a radar target is potentially useful for target detection, classification and recognition. While the Doppler frequency induced by the target body is constant, the micro-Doppler due to vibrating or rotating structures of the target is a function of dwell time. Analysis of the time-varying Doppler signature in the joint time-... View full abstract»

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  • Comparison of the cyclostationary and the bilinear approaches: theoretical aspects and applications to industrial signals

    Publication Year: 2000, Page(s):702 - 706
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (728 KB)

    The aim of our study is to compare two a priori different approaches: bilinearity and cyclostationarity. Indeed, we underline that cyclostationary and bilinear tools make it possible to determine both nonlinear and nonstationary links. These results are based on calculations, simulations for synthetic signals and finally applications to industrial signals. Then, we introduce different applications... View full abstract»

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  • Robust source separation using ranks

    Publication Year: 2000, Page(s):324 - 328
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (364 KB)

    Robustness against deviations from nominal source PDF assumptions is very desirable in blind source separation (BSS) algorithms. A new approach for robust BSS is proposed. We modify the EASI (equivariant adaptive separation by independence) algorithms to use ranks of observed signals. Two different methods for evaluation of ranks are introduced. Our modified algorithm can be applied to both real-v... View full abstract»

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  • Harmonic analysis associated with spatio-temporal transformations

    Publication Year: 2000, Page(s):136 - 140
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (500 KB)

    The paper presents new developments in harmonic analysis associated with the motion transformations embedded in digital signals. In this context, harmonic analysis provides motion analysis with a complete theoretical construction of perfectly matching concepts and a related toolbox leading to fast algorithms. This theory can be built from only two assumptions: an associative structure for the loca... View full abstract»

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  • A new Gerschgorin radii based method for source number detection

    Publication Year: 2000, Page(s):104 - 107
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (292 KB)

    In this paper, we introduce the effective use of Gerschgorin radii (Wu et al, 1995; Wu and Yang, 1996) of the unitary transformed covariance matrix for source number detection. The heuristic approach, applying a new Gerschgorin radii set developed from the projection concept, overcomes the problem in cases of small data samples and an unknown noise model. The proposed method is based on the sample... View full abstract»

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  • Nonlinear system inversion applied to random variable generation

    Publication Year: 2000, Page(s):248 - 251
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (260 KB)

    A method to design random variable (RV) generators with the same probability density function (PDF) as a given RV record is presented. The resulting RV generator is a nonlinear system that when driven by a uniformly distributed RV, provides an output RV with the desired PDF distribution. The analytical description of the desired PDF is not needed; in fact, only a data record of the desired RV is u... View full abstract»

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  • Super-exponential-estimator for fast blind channel identification of mobile radio fading channels

    Publication Year: 2000, Page(s):673 - 676
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (276 KB)

    An iterative algorithm for blind channel identification (no training symbols necessary) based on the super-exponential algorithm is shown. On the assumption of independent identically distributed (IID) data the algorithm has fast convergence properties. It is robust with respect to system overfit (supernumerarily assumed channel coefficients converge to zero) and influence of modest additive white... View full abstract»

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  • Joint time-frequency analysis of SAR data

    Publication Year: 2000, Page(s):480 - 484
    Cited by:  Papers (4)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    The image formation process associated with coherent imaging sensors is particularly sensitive to and is often corrupted by non-stationary processes. In the case of synthetic aperture radar (SAR), non-stationary processes result from motion within the scene, variable radar cross section, multipath, topographic variations, sensor anomalies, and deficiencies in the image formation processing chain. ... View full abstract»

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  • The application of a nonlinear inverse noise cancellation technique to maritime surveillance radar

    Publication Year: 2000, Page(s):267 - 271
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (428 KB)

    A method, referred to as Broomhead's filter method, is reviewed. This method uses a nonlinear inverse to a linear bandstop filter to obtain better noise reduction results, in terms of signal to noise ratio, than linear noise reduction techniques, for the cancellation of wideband chaotic noise from a sinusoid. A novel and unorthodox approach is suggested for the linear bandstop filtering aspect of ... View full abstract»

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