Technique of characterizing the nature of a radiation path trans

Communications: radio wave antennas – Antennas – Balanced doublet - centerfed

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340 3M, 340 155TA, 343100CL, G01S 902, G01S 966

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active

040429288

ABSTRACT:
A specially generated broad band radiation signal is passed through a radiation path. The output radiation as modified by that path is compared with the transmitted radiation in a manner to characterize in the frequency domain the radiation path transfer function or the modified radiation by a few constants of a Taylor series expansion. One application of this technique is in sonar or radar work for characterizing the shape of an object in a manner independent of its velocity but with a high signal-to-noise ratio and very good resolution. The comparison of the modified radiation with the transmitted radiation in order to determine the Taylor series coefficients is accomplished by a correlation or matched filtering operation. The technique in its broadest sense also has applications for compensating communication circuits and in parameterizing human speech.

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patent: 3925653 (1975-12-01), Otto

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