Derives closed-form CRBs showing that larger inter-module separation in modular linear arrays reduces transverse-velocity error while leaving radial-velocity error largely unchanged and allows fewer antennas than a collocated ULA for equivalent accuracy.
Near- field communications: A tutorial review,
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Performance Bounds for Near-Field Velocity Estimation With Modular Linear Array
Derives closed-form CRBs showing that larger inter-module separation in modular linear arrays reduces transverse-velocity error while leaving radial-velocity error largely unchanged and allows fewer antennas than a collocated ULA for equivalent accuracy.