The direction-of-arrivals (DOAs) of plane waves in a high-frequency region are estimated
without spatial aliasing using multi-frequency processing. The method exploits the difference …

Utilization of ocean resources and defense of national security heavily rely on underwater
target tracking technology, which consequently holds significant strategic importance. The …

Matched field processing (MFP) refers to a variety of source localization schemes for known
complicated environments and involves matching measured and calculated (replica) fields …

Direction-of-arrival estimation is difficult for signals spatially undersampled by more than half
the wavelength. Frequency-difference beamforming [Abadi, Song, and Dowling (2012). J …

When the intersensor spacing of a uniform linear array (ULA) is larger than the half-
wavelength of an incident narrowband signal, spatial aliasing is generated. For broadband …

This paper introduces a DOA estimation method for sources beyond the aliasing frequency.
The method utilizes multiple frequencies of sources to exploit the frequency difference …

Theory of the cubic autoproduct and its utility for noisy direction of arrival estimationa) | The
Journal of the Acoustical Society of America | AIP Publishing Skip to Main Content Umbrella …

In this paper, we consider the problem of bearing ambiguity in the direction of arrival (DOA)
estimation due to spatial aliasing when the minimum wavelength of the processing …

Frequency-difference beamforming (FDB) provides a robust estimation of wave propagation
direction by shifting signal processing to a lower frequency which, however, produces a …

Frequency-differencing, or autoproduct processing, techniques are one area of research that
has been found to increase the robustness of acoustic array signal processing algorithms to …