Adaptive techniques for radar detection and identification of objects in an ocean environment

Gjessing, Dag T.

doi:10.1109/joe.1981.1145480

Cited by 16 publications

(6 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Aubrey et al [49] investigate both transmit signal and receive filter design in high clutter environments. Blunt and Mokole [50] provide a detailed review of waveform diversity techniques and challenges, including comprehensive references.…”

Section: Motivation For a Cognitive Radar Classification Schemementioning

confidence: 99%

Proposed ontology for cognitive radar systems

Horne

Ritchie

Griffiths

2018

IET Radar, Sonar & Navigation

View full text Add to dashboard Cite

Cognitive radar is a rapidly developing area of research with many opportunities for innovation. A significant obstacle to development in this discipline is the absence of a common understanding of what constitutes a cognitive radar. The proposition in this article is that radar systems should not classed as cognitive, or not cognitive, but should be graded by the degree of cognition exhibited. We introduce a new taxonomy framework for cognitive radar against which research, experimental and production systems can be benchmarked, enabling clear communication regarding the level of cognition being discussed.

show abstract

Section: Motivation For a Cognitive Radar Classification Schemementioning

confidence: 99%

Proposed ontology for cognitive radar systems

Horne

Ritchie

Griffiths

2018

IET Radar, Sonar & Navigation

View full text Add to dashboard Cite

show abstract

“…Let and , denote the random target and clutter fields, respectively, such that and are in , where is the Fourier operator of the affine group as defined in (8) and (14). Define a random operator as follows: (36) where .…”

Section: Theorem 51mentioning

confidence: 99%

Wideband Extended Range-Doppler Imaging and Waveform Design in the Presence of Clutter and Noise

Yazıcı

Xie

2006

IEEE Trans. Inform. Theory

View full text Add to dashboard Cite

Abstract-This paper presents a group-theoretic approach to address the wideband extended range-Doppler target imaging and design of clutter rejecting waveforms. An exact imaging method based on the inverse Fourier transform of the affine group is presented. A Wiener filter is designed in the affine group Fourier transform domain to minimize wideband clutter range-Doppler reflectivity. The Wiener filter is then used to form an operator to precondition transmitted waveforms to reject clutter. Alternatively, the imaging and clutter rejection methods are equivalently re-expressed to perform clutter suppression upon reception. These methods are coupled with noise suppression upon reception. Numerical simulations are performed to demonstrate the performance of the proposed approach. Our study shows that the framework introduced in this paper can address the joint design of receive and transmit processing, design of clutter rejecting waveforms, suppression of noise, and reduction of computational complexity in receive processing.Index Terms-Affine group, extended range-Doppler reflectivity, waveform design, wideband, Wiener filter.

show abstract

“…In recent contributions [Gjessing, 1981a, b-I, a somewhat detailed discussion was presented of the properties of the electromagnetic field Es(K, t) scattered from a rough surface. The basic scattering equation can be expressed as Es(K, t),-, (r, t)e -•'r d3r (1) where K = k•-ks and [K I= (4rr/2) sin 0/2; 2 is the microwave wavelength and 0 is the scattering angle.…”

Section: A Summary Of Basic Theorymentioning

confidence: 99%

“…Geometry of the scattering process (correlation properties in the frequency domain) [-seeGjessing, 1981a].where R(r)= <If(z)12). Equation (8) states that the envelope of the complex correlation in the frequency domain of waves scattered back from a surface is given by the autocorrelation function R(r) characterizing the surface.Turning now back to our practical computing problem, we again note that we are dealing with a sea surface which is in motion characterized by a coherent wave, giving a resonance in the Doppler spectrum as a result of the ordered velocity and a broad skirt arising from the wide velocity distribution of the incoherent (turbulent) components.…”

mentioning

confidence: 99%