The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 18, 1981
Filed:
Jun. 27, 1979
David P Casasent, Pittsburgh, PA (US);
Demetri Psaltis, Pittsburgh, PA (US);
The United States of America as represented by the Secretary of the Army, Washington, DC (US);
Abstract
A correlation method and apparatus for electrical signal transmission and ception of coded waveforms are disclosed which makes use of a coordinate transformation of the original waveform prior to transmission, effecting an inverse coordinate transformation upon reception and then correlating the resultant waveform with the original waveform. More particularly, the coordinate transformation and its inverse comprises a non-linear transformation preferably of the logarithmic type which when utilized in an electro-optical signal processor of a radar system, for example, provides Doppler invariant output data, as well as additional noise immunity.