By Topic

IEE Proceedings - Radar, Sonar and Navigation

Issue 1 • Date Feb. 1994

Filter Results

Displaying Results 1 - 9 of 9
  • Carrier-free radar signal design with MTI Doppler processor

    Publication Year: 1994, Page(s):59 - 64
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (476 KB)

    Doppler processors with feedback delay line circuits can produce thumbtack range-velocity resolution functions by processing carrier-free radar signals consisting of a large number of characters. The moving target indicator (MTI) Doppler processor, which is a generalisation of the two-pulse canceller circuit, can produce thumbtack range-velocity resolution functions by processing only two characte... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • New method for the simulation of correlated K-distributed clutter

    Publication Year: 1994, Page(s):53 - 58
    Cited by:  Papers (9)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (515 KB)

    Correlated K distributions can be used to describe the clutter seen in coherent radar images. To test the performance of detection and classification algorithms in controlled clutter environments it is necessary to be able to produce accurate simulations of the clutter. For this reason, the simulation of correlated K distributed processes is of interest. A new method for simulating such processes ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Comparison of parameter estimators for K-distribution

    Publication Year: 1994, Page(s):45 - 52
    Cited by:  Papers (50)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (626 KB)

    Parameter estimation forms an essential part of many signal- and image-processing tasks. In particular, in the analysis of coherent imagery, such as that provided by synthetic aperture radar (SAR), parameter estimation is required to characterise the statistical properties of homogeneous regions for use in segmentation and target detection algorithms. The statistics of SAR imagery can be modelled ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Multilevel quantisation and fusion scheme for the decentralised detection of an unknown signal

    Publication Year: 1994, Page(s):37 - 44
    Cited by:  Papers (12)  |  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (615 KB)

    The paper considers the problem of detecting a deterministic but unknown signal using distributed sensors. The unknown signal detection problem is considered as a hypothesis testing problem in which the alternative is quite broad. A multilevel quantisation and fusion scheme is proposed and analysed. The proposed scheme is a modified version of the counting rules and can either be thought of as a f... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Autofocusing technique for adaptive coherent signal-subspace transformation beamformers

    Publication Year: 1994, Page(s):30 - 36
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (609 KB)

    The coherent signal-subspace transformation (CST) wideband beamformer, which integrates the alignment of all frequency components and a frequency-independent weight network, has the capability of handling multipath or coherent wideband signals. If accurate preliminary focusing angles are not available due to, for example, the presence of nonstationary sources or the use of nonbatch processing, it ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Array gain/phase calibration techniques for adaptive beamforming and direction finding

    Publication Year: 1994, Page(s):25 - 29
    Cited by:  Papers (12)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (400 KB)

    A calibration technique is proposed for handling adaptive beamforming and bearing estimation problems involving unknown perturbed sensor gain and phase. This calibration technique is applied on the MUSIC estimator, assuming that two or more signal sources (in which the direction of arrival of one or two of the signal sources are known temporarily) exist in the signal field, so as to estimate the t... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Manifold interpolation for diversely polarised arrays

    Publication Year: 1994, Page(s):19 - 24
    Cited by:  Papers (7)  |  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (467 KB)

    Antenna arrays need to be calibrated to produce reliable direction-of-arrival (DOA) estimates. During the calibration process, the array response vector (also called the array manifold) is measured and stored, for a finite number of directions. Most DOA estimators are based on evaluating a specific cost function at all of the directions for which the array manifold was stored. The direction which ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Investigation of trellis based filters for tracking

    Publication Year: 1994, Page(s):9 - 18
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (746 KB)

    The authors seek to extend the work carried out by Demirbas (1981-1987) on the use of trellis diagrams for state estimation. Linear scalar examples are initially used to improve the accuracy of the algorithm and to highlight a lack of estimator robustness to modelling errors. This is subsequently overcome by using the measurement equation to propagate the trellis diagram. Nonlinear examples are th... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Stability of a decoupled tracking filter with pseudomeasurements in line-of-sight Cartesian co-ordinate system

    Publication Year: 1994, Page(s):2 - 8
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (575 KB)

    Since a decoupled tracking filter in the LOS Cartesian co-ordinate system (LCCS) is an approximation, its stability cannot be guaranteed. The paper presents a stochastic stability of the decoupled tracking filters in LCCS. A predicted LCCS is introduced to reduce the filter bias. Conditions of approximations to obtain a decoupled form are investigated. Using a Lyapunov-like condition, a sufficient... View full abstract»

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

Aims & Scope

IEE Proceedings Radar, Sonar and Navigation covers the theory and practice of systems involving the processing of signals for radar, radio location, radio navigation and surveillance purposes.

Full Aims & Scope