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Journal ArticleDOI

Radar tracking accuracy improvement by means of pulse-to-pulse frequency modulation

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TLDR
Pulse-to-pulse frequency-modulated radars offer a significant reduction in angle tracking error and tracking improvement is derived as a function of tracking servo bandwidth, scintillation spectrum, and FM (frequency modulation) regimen.
Abstract
Angular scintillation tracking noise for simplified radar target models has been analyzed by Delano, Muchmore, Freeman, and others for monofrequency pulse radars. This paper extends their work to the case of pulse-to-pulse frequency-modulated radars and demonstrates that such radars offer a significant reduction in angle tracking error. Tracking improvement is derived as a function of tracking servo bandwidth, scintillation spectrum, and FM (frequency modulation) regimen. A quantity, ΔLfc, is defined as the minimum pulse-to-pulse frequency shift required to achieve maximum tracking improvement, and is derived as a function of target model and radar parameters.

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Journal ArticleDOI

Overview of radar waveform diversity

TL;DR: An overview of waveform diversity is provided in this paper, from the basic principles upon which it is founded to the myriad different areas being explored in research for practical sensing applications, as well as an overview of different areas of interest.
Journal ArticleDOI

Radar measurement of soil moisture content

TL;DR: In this article, the effect of soil moisture on the radar backscattering coefficient was investigated by measuring the 4-8 GHz spectral response from two types of bare-soil fields: slightly rough and very rough, in terms of the wavelength.
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/spl Delta/k-radar equivalent of interferometric SAR's: a theoretical study for determination of vegetation height

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Journal ArticleDOI

Fluctuation statistics of millimeter-wave scattering from distributed targets

TL;DR: In this paper, the applicability of the Rayleigh fading model for characterizing radar scattering from terrain is examined at 35 GHz for both backscattering and bistatic scattering.
Journal ArticleDOI

MIMO Radar Waveforms and Cancellation Ratio

TL;DR: A new MIMO waveform approach is described, called "dithered DDMA" (Doppler division multiple access), which enables high performance clutter cancellation over a large range- doppler region without introducing ambiguous ranges or blind speeds, and without increasing the computational load on the MIMo processor.