By Topic

IEE Proceedings - Radar, Sonar and Navigation

Issue 4 • Date 5 Aug. 2005

Filter Results

Displaying Results 1 - 9 of 9
  • Nonuniform linear antenna arrays minimising Cramer-Rao bounds for joint estimation of single source range and direction of arrival

    Publication Year: 2005, Page(s):225 - 231
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (232 KB)

    Different antenna placements in nonuniform linear arrays for the joint estimation of the range and direction-of-arrival (DOA) of one source are considered. It is shown that the Cramer-Rao bound (CRB) for the range and DOA estimates can be expressed as a function of the angles at which the source sees the antennas. This new formulation of the CRB easily reveals the geometrical properties that the a... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Interference subspace approximation based adaptive beamforming in the presence of a desired signal

    Publication Year: 2005, Page(s):232 - 238
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (243 KB)

    A novel subspace-based adaptive beamforming method is proposed which is very efficient in computation and can be applied to arrays of arbitrary geometry. In the proposed method, an approximate basis of the interference subspace is obtained from a matrix in which the desired signal component has been removed using the information on its direction. The matrix is updated recursively with data samples... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Modified gain extended Kalman filter with application to bearings-only passive manoeuvring target tracking

    Publication Year: 2005, Page(s):239 - 244
    Cited by:  Papers (7)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (213 KB)

    The feasibility of Song and Speyer's modified gain extended Kalman filter using bearings-only measurements is explored for underwater applications. A much simpler version of the modified function introduced by Galkowski and Islam is considered for the development of this algorithm. This algorithm estimates target motion parameters and detects target manoeuvre, using zero mean chi-square distribute... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Reflectivity tuning in multi-layer phase-switched active radar absorbers

    Publication Year: 2005, Page(s):245 - 247
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (117 KB)

    An 'array' polynomial approach is used to predict the positions of the reflectivity s for an ideal phase-switched screen (PSS) having many active layers. Several layer-switching schemes are examined and it is found that the resulting position diagrams exhibit bifurcation behaviour similar to that found in many dynamical systems. The chaotic state is never achieved, however, since the ideal PSS is ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • RCS reduction of spiral patch antenna using a PSS boundary

    Publication Year: 2005, Page(s):248 - 252
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (308 KB)

    The use of a phase-switched screen (PSS) boundary to control the radar cross-section (RCS) of a spiral patch antenna is investigated. A theoretical analysis based on a transmission line analogue is used to examine the concept and to provide basic design criteria. The design of an experimental system that includes a novel dual polarised active PSS boundary is described. Measured results are present... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Contrast maximisation based technique for 2-D ISAR autofocusing

    Publication Year: 2005, Page(s):253 - 262
    Cited by:  Papers (57)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (999 KB)

    An image contrast based algorithm for 2-D ISAR image autofocusing is proposed. The problem of ISAR image autofocusing is formulated analytically by defining geometry and dynamics of the radar-target system and by assuming a mathematical model for the received signal. The image focusing is then achieved by estimating the model parameters through the maximisation of the image contrast. The problem o... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Mosaicing of acoustic camera images

    Publication Year: 2005, Page(s):263 - 270
    Cited by:  Papers (13)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (692 KB)

    An algorithm for image registration and mosaicing on underwater sonar image sequences characterised by a high noise level, inhomogeneous illumination and low frame rate is presented. Imaging geometry of acoustic cameras is significantly different from that of pinhole cameras. For a planar surface viewed through a pinhole camera undergoing translational and rotational motion, registration can be ob... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Position domain filtering and range domain filtering for carrier-smoothed-code DGNSS: an analytical comparison

    Publication Year: 2005, Page(s):271 - 276
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (136 KB)

    Carrier-smoothed-code filters for differential Global Navigation Satellite System (GNSS) positioning can be partitioned into two groups: position domain filters and range domain filters. In carrier-smoothed-code filtering, noise terms of incremental carrier phase act as equivalent propagation noise. The equivalent propagation noises in carrier-smoothed-code filtering are temporally correlated and ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Fast FFT based GPS satellite acquisition methods

    Publication Year: 2005, Page(s):277 - 286
    Cited by:  Papers (48)  |  Patents (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (925 KB)

    A Global Positioning System (GPS) receiver uses satellite signals to determine position, velocity, and timing information. Measurements are obtained by synchronising the locally generated signal in the receiver with the signals received. A synchronisation procedure called acquisition adjusts the code phases of the incoming signal and the locally generated pseudo-random replica sequence of the corr... 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