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- W1974554219 abstract "The linear frequency-modulation chirp pulse compression technique of classical microwave radar is examined in the context of coherent laser radar. A coherent CO<SUB>2</SUB> laser radar may operate near 9.115 micrometers and 33,000 GHz. Because of this short wavelength, a large target Doppler-spread is realizable in a single ladar measurement. In addition, target surface roughness with respect to wavelength causes the target backscatter points to be uniformly distributed over 2(pi) radians in phase resulting in Gaussian/Rayleigh/negative-exponential receiver statistics. Target Doppler spread and speckle as well as target down- range extent affect the linear-FM-chirp pulse compression efficiency thereby degrading the peak compressed-pulse carrier-to-noise. This degradation in carrier-to-noise is quantified using a 'maximum of M Rayleighs' detector model which allows a simple scale factor degradation for other coherent ladar wavelengths, chirp magnitudes, and pulse lengths. The receiver-operating-characteristic of the sum of many Rayleigh distributed random variables is also developed for comparison to the classical sum of many negative- exponential statistics." @default.
- W1974554219 created "2016-06-24" @default.
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- W1974554219 date "1997-08-06" @default.
- W1974554219 modified "2023-09-23" @default.
- W1974554219 title "<title>Linear FM chirp pulse compression ladar receiver operating characteristic: maximum of M Rayleighs statistics</title>" @default.
- W1974554219 doi "https://doi.org/10.1117/12.281012" @default.
- W1974554219 hasPublicationYear "1997" @default.
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