Apparatus and method for suppressing side lobe response in a dig

Details Apparatus and method for suppressing side lobe response in a dig Apparatus and method for suppressing side lobe response in a dig

1983-01-31

1985-04-23

Smith, Jerry

Boots, shoes, and leggings

364574, 364724, 343379, 367905, G06F 305

Patent

active

045133859

ABSTRACT:
A decoder circuit is provided which employs digital sampling and correlation apparatus to detect the presence of a received tone signal exhibiting a predetermined frequency. Samples of received tone signals are taken and, in effect, multiplied by a substantially rectangular observation window which includes a bite interval of selected duration and location therein. A correlator correlates the windowed samples to detect samples corresponding to the predetermined frequency (main lobe frequency). A significant decrease in undesired side lobe response is thus achieved.

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