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Radar and Signal Processing, IEE Proceedings F

Issue 3 • Date Jun 1991

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Displaying Results 1 - 14 of 14
  • Processing of signum coded SAR signal: theory and experiments

    Publication Year: 1991 , Page(s): 192 - 198
    Cited by:  Papers (13)  |  Patents (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (468 KB)  

    A synthetic aperture radar raw signal which is passed through an ideal limiter is considered. Only the information about the zero crossings is provided because of this process. The output signal is processed in the conventional way. It is then sampled at a rate consistent with the original bandwidth. The image does not exhibit any applicable degradation. The full theory of the operation of this si... View full abstract»

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  • Recursive SMLR deconvolution algorithm for Bernoulli-Gaussian signals

    Publication Year: 1991 , Page(s): 263 - 266
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (216 KB)  

    In the past decade, many detection and estimation algorithms have been reported for estimating a desired Bernoulli-Gaussian signal which was distorted by a linear time-invariant system. The well known Kormylo and Mendel's (1982) single most likely replacement (SMLR) algorithm, which works well and has been successfully used to process real seismic data, is an offline signal processing algorithm. T... View full abstract»

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  • Generation and properties of synthetic aperture polar diagrams for use in DF systems

    Publication Year: 1991 , Page(s): 229 - 240
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (928 KB)  

    A synthetic aperture method of generating polar diagrams with shapes which conform to Bessel functions rather than the more familiar sin x/x form is described. The method can be used to generate, using a circular array, polar diagrams for use in Doppler DF and VOR beacon systems. This generation avoids the amplitude limiting employed in conventional forms of these systems. The me... View full abstract»

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  • Use of difference channel information for detection in monopulse radars

    Publication Year: 1991 , Page(s): 199 - 210
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (888 KB)  

    The problem of target detection and acquisition by a monopulse tracking radar is considered. This problem is conventionally addressed using only information in the sum beam. The additional information available in the difference channels may be utilised to give improved performance. Two possible realisations of this concept are presented and analysed in some detail, namely linear combinations of t... View full abstract»

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  • Multipolarisation FM-CW Doppler radar signal processing for nondistributed targets

    Publication Year: 1991 , Page(s): 185 - 191
    Cited by:  Papers (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (452 KB)  

    The Delft FM-CW radar is used to characterise radar targets based on their polarisation parameters and Doppler velocity. Dedicated polarisers allow the radar system to have one receiver only. The domain of the polarisation information interferes with the domain of the Doppler-velocity information. To split these domains and to retrieve the target parameters, a specific processing approach has been... View full abstract»

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  • Adaptive signal parameter estimation and classification technique

    Publication Year: 1991 , Page(s): 267 - 277
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (696 KB)  

    A new technique, adaptive signal parameter estimation and classification technique (ASPECT), is presented for use in both coherent and noncoherent signal environments. Unlike superresolution techniques employing spatial smoothing preprocessing schemes, ASPECT is not restricted to linear arrays. ASPECT is based on an adaptive rotation of an initial subspace up to the point at which the rotated subs... View full abstract»

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  • Target tracking algorithms for phased array radar

    Publication Year: 1991 , Page(s): 255 - 262
    Cited by:  Papers (2)  |  Patents (2)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (572 KB)  

    Phased array radar have an additional degree of freedom compared with track-while-scan radar, in that a variable update time may be used in the former. On detection of a manoeuvre, the update time may be reduced leading to an improved tracking accuracy. It has been shown how a variable update time may be incorporated into the αβ filter, the value of this update time being dependent on t... View full abstract»

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  • Design of contiguous RF filterbanks with application in channelised receivers

    Publication Year: 1991 , Page(s): 289 - 292
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (260 KB)  

    Design techniques for miniature contiguous filterbanks for use in channelised receivers operating in high pulse density environments are presented. These devices use a new prototype transfer function with a maximally flat impulse response which minimises ringing in the time domain caused by pulsed signals. The devices are designed to combine small size with high performance and good manufacturing ... View full abstract»

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  • Suboptimal real-time frequency/incident-angle estimator for multiple radar pulses

    Publication Year: 1991 , Page(s): 247 - 254
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (508 KB)  

    A method is presented that provides numerical estimates of properly paired frequency and incident angles for an arbitrary number of sinusoidal radar pulses incident on a linear array. The key element of the method is a two-stage suboptimal technique that estimates the angle of arrival of a pulse by using the output of two antenna elements and a previously calculated value of paired frequency. A me... View full abstract»

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  • Radar absorbers: better by design

    Publication Year: 1991 , Page(s): 223 - 228
    Cited by:  Papers (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (356 KB)  

    The radar cross section of a structure can be controlled by shaping it and either covering it with radar absorbing materials (RAM) or manufacturing the structure from absorbent engineering materials. A radar absorbing layer can be designed from a knowledge of the complex permeabilities and permittivities of the constituent materials and their frequency dependence. Constrained (in waveguide), and f... View full abstract»

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  • Tracking technique for manoeuvring target with correlated measurement noises and unknown parameters

    Publication Year: 1991 , Page(s): 278 - 288
    Cited by:  Papers (2)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (576 KB)  

    The problem of tracking a manoeuvring target with sequentially correlated measurement noise is considered in the paper. Using Singer's method to model the manoeuvring target, the correlated measurement noise can be decorrelated by reformulating the measurement equation such that the conventional Kalman filter can be directly applied in this tracking problem. An analytical error analysis for this p... View full abstract»

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  • High resolution RCS measurements of boats

    Publication Year: 1991 , Page(s): 218 - 222
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (268 KB)  

    The radar cross-sections (RCS) at I-band for two boats were measured as a function of range and aspect angle by illuminating the boats with 9.3 GHz horizontally polarised microwaves using a purpose built coherent pulsed radar. The total RCS of a mean profile was determined for each aspect angle at which RCS profiles were obtained. The mean of these total RCS values, over all aspect angles, was 33 ... View full abstract»

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  • Optimised array antenna nulling with phase-only control

    Publication Year: 1991 , Page(s): 241 - 246
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (276 KB)  

    The pointing direction gain of a linear phased array antenna is maximised with the constraints of phase-only control at the N antenna elements and the imposition of J nulls at angles θ1, θ2. . ., θJ from the array normal. The specification of J nulling angles requires the a priori knowledge of the directions of the emitt... View full abstract»

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  • Polarisation behaviour of ground clutter during dwell time

    Publication Year: 1991 , Page(s): 211 - 217
    Cited by:  Papers (3)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (452 KB)  

    Analyses the behaviour of ground clutter during dwell time in a low-resolution radar. The analysis is made with reference to measurements made through a pulse radar using right-handed circular polarisation at transmit and two orthogonally circularly polarised channels on reception. Symmetric and asymmetric distribution of polarisation with respect to its average is pointed out for two different ty... View full abstract»

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Aims & Scope

The latest version of this title is Radar, Sonar & Navigation, IET.

Full Aims & Scope