The 2D ambiguity function of continuous-time AFDM chirp subcarriers is derived, showing a periodic comb with parallelogram unambiguity regions and a Doppler shift equal to the subcarrier frequency difference for cross-ambiguity.
Orthogonal time frequency space modulation,
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Ambiguity Function Analysis of AFDM Signals for Integrated Sensing and Communications
The 2D ambiguity function of continuous-time AFDM chirp subcarriers is derived, showing a periodic comb with parallelogram unambiguity regions and a Doppler shift equal to the subcarrier frequency difference for cross-ambiguity.