AirFM-DDA: Air-Interface Foundation Model in the Delay-Doppler-Angle Domain for AI-Native 6G

AirFM-DDA introduces an Air-interface Foundation Model operating in the Delay-Doppler-Angle (DDA) domain for AI-native 6G physical layer tasks. This model reparameterizes channel state information from the space-time-frequency domain to explicitly resolve multipath components, overcoming the computational overhead of existing global attention mechanisms.