IEEE International Conference on Radar

7-10 May 1990

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Displaying Results 1 - 25 of 114
  • Record of the IEEE 1990 International Radar Conference (Cat. No.90CH2882-9)

    Publication Year: 1990
    Request permission for commercial reuse | PDF file iconPDF (61 KB)
    Freely Available from IEEE
  • A study of cost-effectiveness of low altitude coverage over ground by air surveillance radars

    Publication Year: 1990, Page(s):396 - 400
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (248 KB)

    Three schemes of low-altitude coverage over ground by air surveillance radars are discussed. They are the ground radar netting, the balloon lifted radars, and the AEW (airborne early warning) system. The cost-effectiveness of each scheme is analyzed and compared with others. The results show that for peacetime use the balloon radar is the best and AEW the worst, but in wartime the conclusion is re... View full abstract»

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  • Solving the problems of a single antenna frequency modulated CW radar

    Publication Year: 1990, Page(s):391 - 395
    Cited by:  Papers (59)  |  Patents (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (372 KB)

    A reflected power canceller (RPC) using modern p-i-n diode technology which enables a frequency modulated continuous wave (FMCW) radar to operate using a single antenna for transmission and reception is described. Results are presented which demonstrate that such a canceller solves the problems for many CW-type radars over large RF bandwidths (i.e. >2 GHz at X-band). The RPC has been s... View full abstract»

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  • The Doppler spectrum for accelerating objects

    Publication Year: 1990, Page(s):385 - 390
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    The formalism for computing the Doppler spectrum for perfectly reflecting mirrors undergoing various types of accelerations is reviewed. This method is an amplification of work done by D. Censor and J. Cooper for one-dimensional waves. For sinusoidal waves, the formalism provides a computationally easy algorithm that enables determination of the Doppler spectrum. This method is exact and does not ... View full abstract»

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  • Radar coverage predictions through time- and range-dependent refractive atmospheres with planetary boundary layer and electromagnetic parabolic equation models

    Publication Year: 1990, Page(s):370 - 378
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (696 KB)

    The enhancement of the capability of electromagnetic parabolic equation (EMPE) and other propagation codes by using predictions from an atmospheric forecast model to provide refractivity data for range-dependent and time-varying situations is demonstrated. Starting from measured temperature and humidity data at one location and time, the JHU/APL planetary boundary layer model is used to obtained p... View full abstract»

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  • Measured scattering-matrix-data and a polarimetric CFAR-detector which works on this data

    Publication Year: 1990, Page(s):514 - 519
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    Problems with a polarimetric radar which is able to measure the complete scattering matrix (SM) of a reflecting object are discussed. Emphasis is placed on polarimetric signal processing, in which the multichannel polarimetric target information is used to obtain improved results compared with signal processing of a nonpolarimetric radar. Measured SM data of different targets (rain and ground clut... View full abstract»

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  • Experimental phased array radar ELRA with extended flexibility

    Publication Year: 1990, Page(s):286 - 290
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (452 KB)

    A research project with the experimental phase-array system ELRA is discussed with respect to the extended and improved possibilities for performing measurements and evaluations for different types of radar operation. The variability of waveforms for solid-state transmitters is described. Flexible control of multifunction operation with various search and localization tasks is achieved with a netw... View full abstract»

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  • Subsurface radar for detection of buried targets

    Publication Year: 1990, Page(s):129 - 134
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (468 KB)

    The application of a short-pulse, high-angular-resolution array focused in the near field for detection and imaging of shallow subsurface objects is discussed. An experimental system based on a forward-looking bistatic radar configuration with a digital synthetic aperture array receiver is described. Beam steering and scanning are accomplished using phase compensation based on simplified models of... View full abstract»

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  • Time-varying spectra for dual-polarized radar returns from targets in an ocean environment [X-band radar system]

    Publication Year: 1990, Page(s):365 - 369
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (340 KB)

    A dual-polarized, coherent X-band radar system tailored specifically to the demands of research use has been developed. A field experiment in June 1989 conducted from a coastal site in Newfoundland involved the collection of radar data for an iceberg, a growler, sea clutter, a buoy-mounted reflector, and a waverider buoy. The analysis of the radar returns from these various targets is dis... View full abstract»

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  • Censored video integration in radar detection

    Publication Year: 1990, Page(s):511 - 513
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (152 KB)

    The performances of the classical video integrator and the well-known binary integrator (which can also be called an order statistics integrator) are compared with that of a new integrator, called the censored video integrator (CVI), for a Swerling II target in Gaussian noise. CVI performs sorting, censoring, and nonuniform weighted averaging. It is shown that for a Swerling II target, the added l... View full abstract»

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  • Effect of leading edge jitter on MTI improvement factor

    Publication Year: 1990, Page(s):322 - 328
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB)

    The effect of system disturbances on the improvement factor of moving target indicator (MTI) processors is discussed. The effects are determined analytically and are confirmed by a simulation of a generic MTI processor. The improvement factor for both point and distributed clutter is considered, with distributed clutter placing the more stringent requirements on system stability. Pulse risetime an... View full abstract»

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  • The crow's nest antenna-experimental results

    Publication Year: 1990, Page(s):280 - 285
    Cited by:  Papers (7)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (596 KB)

    The experimental radar system CNA-512 is introduced. Its core is a spatial array consisting of 512 statistically distributed microstrip antennas. The object is to demonstrate radar operation over 360° without need for mechanical antenna rotation. The CNA-512, working at X-band, is designed for a look-direction-independent beamwidth of 2.7°. The positions of the single elements (mi... View full abstract»

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  • Coherent radar system performance estimation

    Publication Year: 1990, Page(s):125 - 128
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (244 KB)

    The performance of coherent radar systems is not limited by thermal amplitude noise, but rather by the phase and amplitude effects of errors in the vector detection process. The contributors to the limitation of coherent radar performance are discussed, and the specific effects of the most salient of these are addressed. In addition to the internal motion (spectrum) of the clutter itself, factors ... View full abstract»

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  • Experimental study of polarization influence on angles intensity

    Publication Year: 1990, Page(s):362 - 364
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (180 KB)

    Good weather angels are echoes detected by a radar when in the searched volume of air space no real objects exist. Experimental work is presented to show how the polarization state affects the intensity of good weather angels. Experimental data have been collected from the L-band long-range Polish primary surveillance radars (PSRs) (AVIA C) by registration of plots from the extractor and ... View full abstract»

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  • Constant false alarm rate for a radar data fusion center with N parallel distributed cell averaging receivers

    Publication Year: 1990, Page(s):507 - 510
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (228 KB)

    The performance of a fusion data center for a network of N radar receivers is analyzed. The total probabilities of detection and false alarm are obtained using a rank fusion rule. A constant false alarm rate operation that has been analyzed for Rayleigh targets and interference is proposed. For a given probability of fused false alarm an iterative method to calculate the threshold of dete... View full abstract»

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  • True multi-radar tracking for air defence C3 systems

    Publication Year: 1990, Page(s):612 - 614
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (192 KB)

    A typical C3 system for air defence requires a clear and unambiguous air picture for efficient management of the air defence resources. Often a number of surveillance radars provide the main input data. Some kind of multi-radar tracking is then desirable for integrating the radar data to form the air picture. A number of different multi-radar tracking principles are in use. A number of ... View full abstract»

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  • Range ambiguous signature against sea clutter in an X-band multifunction radar

    Publication Year: 1990, Page(s):316 - 321
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB)

    A multifunction X-band naval radar with an antenna that is mechanically scanned in azimuth and electronically scanned in both elevation and azimuth is discussed. Simulations that are mainly based on the cumulative detection probability are used to compare the performances of more or less range-ambiguous waveforms. It is demonstrated that range-ambiguous waveforms using medium pulse repeti... View full abstract»

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  • Frequency-jumped burst waveforms with stretch processing

    Publication Year: 1990, Page(s):274 - 279
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (532 KB)

    Frequency-jumped burst (FJB) waveforms for wideband phased-array radars are discussed. These waveforms can avoid or reduce the need for time-delay steering. Fast Fourier transform (FFT)-based stretch processing is a computationally efficient means of compressing FJB. However, this type of system poses several concerns that require attention, including mismatch loss, Doppler sensitivity, and gratin... View full abstract»

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  • Modern millimetric wave radar systems

    Publication Year: 1990, Page(s):473 - 479
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (740 KB)

    A number of recent civilian and military Ka-band and millimetric wave radars are discussed. The advantages, such as weights and size reduction, of millimetric wave radars are described. The feasibility of the production of some of these radar systems is examined. It is concluded that recent advances in millimetric wave technology make solid-state millimetric wave missile guidance systems ... View full abstract»

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  • Detection performance and systolic architectures for OS-CFAR detectors

    Publication Year: 1990, Page(s):112 - 116
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    Performance analyses and architectures for the order statistic detectors (OSD) in radar signal processing are presented. Based on an analytical model in which the number of interfering targets is random, the detectability is evaluated. It is shown that the system is much more susceptible to a random degree of interference than merely a fixed number of interferers. In addition, a relationship betwe... View full abstract»

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  • A maneuvering target tracking system with correlated measurement noises

    Publication Year: 1990, Page(s):451 - 455
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    The maneuvering target tracking problem with correlated measurement noises is considered. Using the multiple model estimator method to accommodate the maneuvering effect, an efficient algorithm is derived to decorrelate the measurement noise in the system. It is found that significant improvement of the system performance can be obtained from the decorrelation process. A tuning algorithm is propos... View full abstract»

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  • Processing considerations for hybrid waveforms utilizing complementary phase coding and linear frequency stepping

    Publication Year: 1990, Page(s):606 - 611
    Cited by:  Papers (9)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (424 KB)

    The processing necessary for a hybrid radar waveform utilizing both complementary phase coding and linear frequency stepping to achieve improved range resolution in a radar system which is processor-bandwidth limited is investigated. An advantage of the technique presented is that a radar system may be designed with a lower processor bandwidth consistent with the phase code chip time instead of th... View full abstract»

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  • An automatic phase alignment system for transmitters

    Publication Year: 1990, Page(s):141 - 146
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (420 KB)

    An automatic phase alignment concept that will adjust and maintain the correct phase balance within a radar transmitter configured with one or more pairs of parallel channels is proposed. Such a system would eliminate the maintenance of tight tolerances on the absolute lengths of individual components within the transmitter's parallel paths and will compensate for long-term variations in component... View full abstract»

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  • New aspects of airborne MTI

    Publication Year: 1990, Page(s):335 - 340
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (456 KB)

    The performance of adaptive moving target indication (MTI) filters for use on airborne radar platforms is addressed. Clutter returns received by a moving radar exhibit a Doppler shift which depends on the platform velocity, on the cosine of the angle between the flight axis, and the position of the individual scatterer. Therefore, the platform motion causes clutter echoes to be Doppler broadband, ... View full abstract»

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  • An experimental adaptive digital pulse compression subsystem for multi-function radar applications

    Publication Year: 1990, Page(s):153 - 158
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (616 KB)

    An experimental adaptive digital pulse compression (ADPC) subsystem is described. This unit implements a complex correlation between a stored replica of the transmitted waveform and the signals received by the radar. Key to the adaptability of this unit is the use of high-speed VLSI digital ICs which permit bandwidths of up to 10 MHz, along with its ability to use a different waveform or pulse cod... View full abstract»

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