What's Happening?
A new framework has been developed to understand aliasing artifacts in near-field array ambiguity functions. The study introduces a spectral folding process that generates aliasing artifacts, defining near-field grating lobes. The framework connects local
spatial-frequency modeling to established far-field principles, providing practical guidelines for array design. The study applies the framework to specific uniform linear and circular array topologies, offering closed-form expressions to explain the structure of resulting grating lobes.
Why It's Important?
Understanding aliasing in near-field array ambiguity functions is crucial for improving the accuracy and reliability of sensing systems. The new framework provides insights into the structural properties of sensing systems, helping to mitigate localization ambiguities caused by grating lobes. This advancement is significant for applications in radar, communication, and positioning systems, where precise localization is essential. The framework's ability to connect near-field and far-field principles offers a comprehensive approach to array design, enhancing system performance.
