Adaptive detector arrays for optical communications receivers
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[0032] The present invention is directed to an optical communications receiver comprising a wide-band optical detector array and a high-speed digital signal processor assembly programmed to operate on the raw data from the detector array to ameliorate the effects of atmospheric turbulence on the performance of the optical receiver in real-time while operating within the terrestrial atmosphere, or while attempting to communicate through any similar turbulent medium.
[0033] An example of the increase in the effective dimensions of an exemplary receiver point-spread function over its diffraction-limited value as a result of atmospheric turbulence is shown by comparison in FIGS. 1a and 1b. The hypothetical signal shown in these figures correspond to a telescope having a 1 m aperture, an 0.3 m central obstruction, and a 4 cm atmospheric coherence. As shown in FIG. 1a, under ideal conditions the undistorted signal generates a diffraction limited point spread function (PSF) in the detector arr
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