Wideband Auto-Ambiguity Function Nulling Algorithm

Nathaniel A. Henry, John F. Doherty, David M. Jenkins

Research output: Chapter in Book/Report/Conference proceedingConference contribution


This report discusses the placement of null regions on the wideband auto-ambiguity function (WBAAF). To date, the majority of papers on this subject apply the null regions to the narrow band, side lobe cancellation of the auto-ambiguity function for a radar echo pulse. By selectively placing a null region in an original waveform's WBAAF, a transmit sequence, especially a white noise radar pulse, can be tailored to lower the energy of peak regions on the WBAAF surface that might be masking desirable portions. The approach discussed in this paper is a unique iterative algorithm which we have termed the Wideband Nulling Algorithm. The Wideband Nulling Algorithm operates on time-scaled data and thus inherently utilizes a wideband approach to placing a null in the ambiguity function surface. Since the algorithm operates on the time domain series, it maps an original waveform to a new time domain waveform such that its second order statistics have a WBAAF surface containing the desired null regions. The goal is to perform this mapping operation with minimal disturbance or impact to the original signal so that the signal content or message is not disturbed. This Wideband Nulling Algorithm is an elegantly simple, mathematical process to reduce interference clutter peaks from a radar, sonar, or an ultrasound ambiguity function surface. This fundamental process has potential applications to many fields including biomedical imaging.

Original languageEnglish (US)
Title of host publicationMILCOM 2021 - 2021 IEEE Military Communications Conference
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages6
ISBN (Electronic)9781665439565
StatePublished - 2021
Event2021 IEEE Military Communications Conference, MILCOM 2021 - San Diego, United States
Duration: Nov 29 2021Dec 2 2021

Publication series

NameProceedings - IEEE Military Communications Conference MILCOM


Conference2021 IEEE Military Communications Conference, MILCOM 2021
Country/TerritoryUnited States
CitySan Diego

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering


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