Waveform frequency notching

Doerry, Armin W.; Andrews, John

Title: Waveform frequency notching

Patent · Tue May 09 00:00:00 EDT 2017

OSTI ID:1356234

Doerry, Armin W.; Andrews, John

The various technologies presented herein relate to incorporating one or more notches into a radar spectrum, whereby the notches relate to one or more frequencies for which no radar transmission is to occur. An instantaneous frequency is monitored and if the frequency is determined to be of a restricted frequency, then a radar signal can be modified. Modification can include replacing the signal with a signal having a different instantaneous amplitude, a different instantaneous phase, etc. The modification can occur in a WFS prior to a DAC, as well as prior to a sin ROM component and/or a cos ROM component. Further, the notch can be dithered to enable formation of a deep notch. The notch can also undergo signal transitioning to enable formation of a deep notch. The restricted frequencies can be stored in a LUT against which an instantaneous frequency can be compared.

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Research Organization:: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: AC04-94AL85000

Assignee:: Sandia Corporation

Patent Number(s):: 9,645,227

Application Number:: 14/548,676

OSTI ID:: 1356234

Resource Relation:: Patent File Date: 2014 Nov 20

Country of Publication:: United States

Language:: English

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