Array-Geometry Invariant Signaling for MISO Feedforward Opportunistic Communications

The impact of antenna array geometry on scenario-aware invariant signaling is studied in the context of feedforward opportunistic communications. Invariance plays an elemental role to guarantee the detectability in noncooperative opportunistic systems. Specifically, we prove that received signal is independent of array geometry and hence time-domain invariance is preserved in a multiple-input single-output (MISO) communication with arbitrary array geometry. To address the latter, we exploit the idea of array manifold separation. Numerical simulations are reported to corroborate the theoretical contribution.