For transmit-sensor-selection ISAC, the identifiability-constrained codebook size is exactly C(Nt-2,Q-2) for a uniform linear array and 1 for a nonredundant array, with general upper and lower bounds between them.
Such waveforms find applications in resource-efficien t MIMO ISAC systems, where, for instance, the transmitter has a limited number of RF chains due to power or cost constraints
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Sparse Array Sensor Selection in ISAC with Identifiability Guarantees
For transmit-sensor-selection ISAC, the identifiability-constrained codebook size is exactly C(Nt-2,Q-2) for a uniform linear array and 1 for a nonredundant array, with general upper and lower bounds between them.