Array geometries with identical sum co-arrays can have different identifiability at low waveform rank; a necessary condition reveals that unfavorable redundancy patterns in some redundant arrays prevent lossless rank reduction.
Super-resolution with sparse arrays: A non-asymptotic an alysis of spatio-temporal trade-offs
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On the Impossibility of Lossless Waveform Rank Reduction for Certain Redundant Arrays
Array geometries with identical sum co-arrays can have different identifiability at low waveform rank; a necessary condition reveals that unfavorable redundancy patterns in some redundant arrays prevent lossless rank reduction.