04561019 is referenced by 48 patents and cites 6 patents.

Methods for improving the availability of information derived from signals received from an object irradiated with coherent pulses of any form of radiation that exhibits a wave nature are disclosed. A method for reducing speckle derives separate component noncoherent signals from the received signals, and combines these separate noncoherent signals to form improved composite noncoherent signals. Weighting and processing of component signals can be applied as a function of time, frequency, and signal amplitude to optimize speckle reduction in all or a critical part of the signal by compensating for the range and frequency dependence of attenuation and the frequency dependence of scattering phenomena. In a method for enhancing resolution, separate component coherent signals are derived from the received signals, weighted and processed, and combined to form improved composite coherent signals; then noncoherent signals are derived from the improved composite coherent signals. In both methods, signals can be processed either in the analog or digital domains or in hybrid analog/digital domains. The apparatus for performing each method also is disclosed.

Title
Frequency diversity for image enhancement
Application Number
6/494633
Publication Number
4561019
Application Date
May 16, 1983
Publication Date
December 24, 1985
Inventor
Ernest J Feleppa
Rye
NY, US
Marek Elbaum
Dobbs Ferry
NY, US
Frederic L Lizzi
Tenafly
NJ, US
Agent
Brumbaugh Graves Donohue & Raymond
Assignee
Riverside Research Institute
NY, US
IPC
H04N 7/18
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