Spectral vs Temporal vs Hybrid Inputs for RF Modulation Recognition under Aliasing Stress

We compare spectral ( create spectral input:
FFT→256), temporal ( create temporal input: 128 I/Q), and
hybrid fusion ( create transformer input) for modulation
recognition. We report macro-AUROC and robustness under
test-time aliasing (integer decimation with/without anti-alias
FIR).