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Fig. 2

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Different time-frequency tiling strategies and their respective efficiency at capturing an MBHB signal (represented in red). In a good sparse representation, the ratio of the number of active blocks over total blocks should be small. Furthermore, to increase the S/N within blocks and improve detectability, the ratio of the signal power over the block area should be high, especially early in the inspiral, where signal power is easily drowned in noise.

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