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EURASIP Journal on Advances in Signal Processing
Fig. 2 | EURASIP Journal on Advances in Signal Processing

Fig. 2

From: RANSAC algorithm for instantaneous frequency estimation and reconstruction of frequency-modulated undersampled signals

Fig. 2

STFTs with various numbers of available samples (K/N=7.8%—upper row and K/N=18.7%—lower row) and for three different window widths (left column h=16, middle column h=48, and right column h=128). Middle line corresponds to the exact IF, two parallel lines are separated Δω from the exact IF (zone of correct estimates (8)) and circles are the IF estimates. The white area on graphs corresponds to missing values of the STFTs due to narrow windows and a small number of available samples.

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