The Ambiguity Function of a Linear Signal Space
For TF signal analysis, two fundamental types of TF signal representations can be distingushed, namely, the “energetic” type and the “correlative” type [Hlawatsch, 1991]. The energetic mode of TF analysis seeks to define “TF energy distributions” that satisfy the marginal properties (1.6)-(1.8) or, more generally, give an indication of how the signal is distributed over the TF plane. Two prominent energetic TF distributions are the WD and the spectrogram.
KeywordsCross Term Signal Space Ambiguity Function Hermite Function Orthogonal Projection Operator
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