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In 4G LTE and 5G New Radio (NR), Orthogonal Frequency Division Multiplexing (OFDM) has been the undisputed king of physical layer multi-carrier waveforms. OFDM works exceptionally well in static or low-speed environments like homes, offices, and walking speeds. However, as we move toward 6G—where devices communicate on high-speed bullet trains (350+ km/h), in low-Earth orbit (LEO) satellites moving at 28,000 km/h, and in autonomous vehicle-to-everything (V2X) swarms—OFDM hits