Antenna Array Design for Mono-Static ISAC
arxiv(2024)
摘要
Mono-static sensing operations in Integrated Sensing and Communications
(ISAC) require joint beamforming operations between transmitter and receiver,
according to all the considerations already done in the radar literature about
coarray theory. In contrast to pure radar systems, ISAC requires to fulfill
communications tasks and to retain the corresponding design constraints for at
least one half-duplex array. This shifts the available degrees of freedom to
the design of the second half-duplex array, that completes the mono-static
sensing setup of the ISAC system. Therefore, it is necessary to translate the
analysis from the radar literature for the design of sparse arrays to the new
ISAC paradigm in order to provision such systems.
Accordingly, we propose a model to evaluate the angular capabilities of an
ISAC setup, constrained to the shape of the communications array and its
topology requirements. Our analysis is validated by simulation experiments,
confirming the value of our model in providing system designers with a tool to
drastically improve the trade-off between angular capabilities for sensing and
the cost of the deployed hardware. Finally, we discuss possible enhancements to
the cellular standards to fully leverage the angular capabilities of such
mono-static ISAC systems.
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