Under transmit beamforming, the CRB-minimizing receive array is unique (clustered at aperture edges), while the transmit array can be chosen freely, enabling a jointly optimal sparse geometry with a contiguous nonredundant sum co-array.
We focus on the four array geometries depicted in Fig
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Jointly optimal array geometries and waveforms in active sensing: New insights into array design via the Cram\'er-Rao bound
Under transmit beamforming, the CRB-minimizing receive array is unique (clustered at aperture edges), while the transmit array can be chosen freely, enabling a jointly optimal sparse geometry with a contiguous nonredundant sum co-array.