Scheduled System Maintenance
On Saturday, December 10, single article sales and account management will be unavailable from 5:00 AM-7:30 PM ET.
We apologize for the inconvenience.
By Topic

IEEE Transactions on Antennas and Propagation

Issue 3 • March 1986

Filter Results

Displaying Results 1 - 25 of 26
  • [Front cover and table of contents]

    Publication Year: 1986, Page(s): 0
    Request permission for commercial reuse | PDF file iconPDF (203 KB)
    Freely Available from IEEE
  • Introduction

    Publication Year: 1986, Page(s):273 - 275
    Request permission for commercial reuse | PDF file iconPDF (322 KB)
    Freely Available from IEEE
  • Parallel spatial processing: A cure for signal cancellation in adaptive arrays

    Publication Year: 1986, Page(s):347 - 355
    Cited by:  Papers (21)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (784 KB)

    A spatial processing algorithm with parallel structure is presented for the prevention of signal caneellation phenomena in conventional adaptive arrays. This algorithm basically uses a parallel structure with a spatial averaging effect to combat coherent jamming. It results in a spatially smoothed maximum-likelihood estimate of the desired signal when the adaptive beamformer converges. Simulations... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Wide-band adaptive array processing using pole-zero digital filters

    Publication Year: 1986, Page(s):355 - 367
    Cited by:  Papers (27)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1192 KB)

    Conventional broad-band array processing is accomplished by linearly combining the outputs of tapped-delay lines attached to each sensor of an array. This type of processing can be interpreted as using an all-zero digital filter at each sensor to generate a frequency-dependent magnitude and phase shift (weighting) over the array operating bandwidth. A new array processing method is presented which... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A novel algorithm and architecture for adaptive digital beamforming

    Publication Year: 1986, Page(s):338 - 346
    Cited by:  Papers (83)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (872 KB)

    A novel algorithm and architecture are described which have specific application to high performance, digital, adaptive beamforming. It is shown how a simple, linearly constrained adaptive combiner forms the basis for a wide range of adaptive antenna subsystems. The function of such an adaptive combiner is formulated as a recursive least squares minimization operation and the corresponding weight ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A new set of linear constraints for broad-band time domain element space processors

    Publication Year: 1986, Page(s):320 - 329
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (808 KB)

    A new set of linear constraints for designing broad-band time domain element space antenna array processors is presented. The set of linear constraints is used to ensure that a desired look-direction response of the processor over a frequency band of interest can be closely approximated. The design technique is posed in such a way that three types of presteering can be handled: no presteering, coa... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Multiple source DF signal processing: An experimental system

    Publication Year: 1986, Page(s):281 - 290
    Cited by:  Papers (55)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1280 KB)

    The multiple signal characterization (MUSIC) algorithm is an implementation of the signal subspace approach to compute parameter estimates of multiple point-source signals from the observed voltages received on an array of M antennas. In it, the solution to the multiple source direction finding (DF) problem is provided by the intersection of the signal subspace... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Exact solution for control loop adaptive antenna weights in band-limited noise

    Publication Year: 1986, Page(s):395 - 403
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (768 KB)

    A technique is presented that yields exact solutions for the noise analysis of the Applebaum adaptive algorithm. Past researchers have derived results under the assumption that the input noise is rapidly varying with respect to the output weighting vector of the Applebaum algorithm. In this paper, this work has been extended to include noise that can vary at any rate. External noise sources are mo... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Steady state analysis of the generalized sidelobe canceller by adaptive noise cancelling techniques

    Publication Year: 1986, Page(s):330 - 337
    Cited by:  Papers (27)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (792 KB)

    Narrow-band adaptive noise cancelling techniques are used to study the generalized sidelobe canceller (GSC), a general form of linearly constrained adaptive beamforming structure. In an environment which consists of a look-direction signal, one jammer, and additive receiver noise, exact expressions are derived for the Wiener solution, the steady state output signal-to-interference-plus-noise ratio... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Spatial spectrum estimation in a coherent signal environment using an array in motion

    Publication Year: 1986, Page(s):301 - 310
    Cited by:  Papers (40)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (888 KB)

    Spatial spectrum estimation utilizing an array in motion is here investigated for dealing with coherent arrivals in a multiple signal environment. The effect of estimating the spatial correlations while the array is moving is studied in terms of the decorrelation it produces, the change it causes in the eigenvalues of the correlation matrix, and the improvements obtained in the measured spectrum. ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • An alternate derivation of the distribution of the conditioned signal-to-noise ratio

    Publication Year: 1986, Page(s):463 - 464
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (144 KB)

    A result in multiple regression analysis is used to derive the probability distribution of the conditioned signal-to-noise ratio. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Using spectral estimation techniques in adaptive processing antenna systems

    Publication Year: 1986, Page(s):291 - 300
    Cited by:  Papers (120)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1080 KB)

    Improved spectral estimation techniques hold promise for becoming a valuable asset in adaptive processing array antenna systems. Their value lies in the considerable amount of additional useful information which they can provide about the interference environment, utilizing a relatively small number of degrees of freedom (DOF). The "superresolution" capabilities, estimation of coherence, and relat... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The effects of reflector antenna diffraction on the interference cancellation performance of coherent sidelobe cancellers

    Publication Year: 1986, Page(s):432 - 439
    Cited by:  Papers (4)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (600 KB)

    While adaptive antenna technology has undergone significant development, little attention has been given to the impact of antenna design on the performance of the adaptive system. A need exists to factor the details of the antenna system response into the analysis of adaptive system performance, particularly in the case where adaptive cancellation is required over a broad bandwidth. At extremely h... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Tamed adaptive antenna array

    Publication Year: 1986, Page(s):388 - 394
    Cited by:  Papers (24)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (672 KB)

    The adaptive array under directionaily constrained minimization of power (DCMP) algorithm is improved by adding a "pseudonoise." It is effective to protect the desired signal from cancellation or distortion in such cases as 1) where a coherent interference is incident, or 2) where the desired signal direction for the constraint contains some pointing error, or 3) when the desired signal is broad b... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • An adaptive algorithm for array processing

    Publication Year: 1986, Page(s):454 - 458
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    A mathematical summary of the joint complex least squares lattice (JCLSL) adaptive algorithm is presented. The algorithm has as inputs two scalar discrete time series (primary. and reference channels). Output consists of the filtered reference channel subtracted from the primary channel. The convergence characteristics of the algorithm are illustrated experimentally for a problem where the referen... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Methods for null control and their effects on the radiation pattern

    Publication Year: 1986, Page(s):404 - 409
    Cited by:  Papers (130)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (512 KB)

    Several methods for synthesis of array antenna patterns with prescribed nulls are reviewed. Methods based on full amplitude/phase control at each array element and methods with a restricted number of degrees of freedom are compared, with attention focused on the characteristic features of the resultant patterns. These features are largely independent of any algorithm for achieving the nulls, and t... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A practical method of obtaining constant convergence rates in LMS adaptive arrays

    Publication Year: 1986, Page(s):440 - 446
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (728 KB)

    A practical, readily realizeable method of eliminating the old problem of widely disparate modal convergence rates in least mean squares (LMS) adaptive arrays is analyzed. The method is mathematically based on the Newton-Raphson iteration technique of finding zeros of a function. The practical realization is based on an extension of Compton's improved-feedback adaptive loop. It is shown how this m... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • An adaptive generalized sidelobe canceller with derivative constraints

    Publication Year: 1986, Page(s):311 - 319
    Cited by:  Papers (157)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (880 KB)

    An adaptive broad-band beamforming structure is presented which employs a gradient-based weight adjustment algorithm to minimize output variance subject to a set of J linear constraints on broadband directional derivatives in the desired look direction. A generalized sidelobe-cancelling structure is employed in which a nonadaptive (conventional) beamformer opera... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Multiple emitter location and signal parameter estimation

    Publication Year: 1986, Page(s):276 - 280
    Cited by:  Papers (4538)  |  Patents (179)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    Processing the signals received on an array of sensors for the location of the emitter is of great enough interest to have been treated under many special case assumptions. The general problem considers sensors with arbitrary locations and arbitrary directional characteristics (gain/phase/polarization) in a noise/interference environment of arbitrary covariance matrix. This report is concerned fir... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Fast orthogonalization networks

    Publication Year: 1986, Page(s):458 - 462
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (440 KB)

    A numerically efficient and stable algorithm is developed to adaptively filter multiple input channels into desired multiple output channels. The algorithm is a type of adaptive lattice filter that employs a fast orthogonalization network (FON) algorithm for numerical efficiency. Past researchers have concentrated on developing efficient lattice algorithms to process stationary input channels; i.e... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A planar version of a 4.0 GHz reactively steered adaptive array

    Publication Year: 1986, Page(s):427 - 431
    Cited by:  Papers (28)  |  Patents (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (424 KB)

    -A planar (two-dimensional) reactively steered adaptive array (RESAA) including a single active microstrip element and eight closely coupled parasitic microstrip elements has been designed and tested. Steering of a null toward a single incident jammer is accomplished by adaptive control of reactive terminations on the parasitic elements using a guided random search algorithm. The planar array can ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Considerations on a scanned adaptive superresolution array

    Publication Year: 1986, Page(s):447 - 453
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (584 KB)

    The behavior of a scanned Howells-Applebaum (H-A) adaptive superresolution array (SRA) in a steady-state after convergence is derived analytically. The steering signals are scanned (swept) with time in order to observe the signal source locations. However, the SRA performance deteriorates seriously when scanning is fast. First, we study the causes of degradation of the scanned SRA performance at a... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Area coverage adaptive nulling from geosynchronous satellites: Phased arrays versus multiple-beam antennas

    Publication Year: 1986, Page(s):410 - 419
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (976 KB)

    Antenna design trade-offs associated with providing an area coverage communication link via a geosynchronous satellite, where the geographical area to be serviced by the associated adaptive antenna system is characterized by a narrow-cone angle directed at an a priori known region on the earth's surface, are considered. Interference sources within and just surrounding the coverage area are adaptiv... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A coherent perturbation algorithm

    Publication Year: 1986, Page(s):380 - 388
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (824 KB)

    A coherent perturbation (CP) adaptive technique which eliminates the need to implement a separate receiver on each adaptive element is described. The new algorithm supports more implementation options than other perturbation techniques and produces an estimate of the power in a single element. A hardlimited version of the new algorithm can also be implemented to reduce the dynamic range requiremen... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Analysis of constrained LMS algorithm with application to adaptive beamforming using perturbation sequences

    Publication Year: 1986, Page(s):368 - 379
    Cited by:  Papers (32)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (936 KB)

    Adaptive antenna array processing employing a constrained least mean square (LMS) algorithm requires an unbiased estimate of the gradient of the output power with respect to the array weights. There are a number of schemes for obtaining an unbiased estimate of this gradient. Though in each case the estimated gradient is unbiased, the covariance of the estimated gradient with each method is differe... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.

Aims & Scope

IEEE Transactions on Antennas and Propagation includes theoretical and experimental advances in antennas.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief                                                 Kwok W. Leung