%0 Journal Article %A Ares Santos, Laura %A Luis Aina, Alfredo %T Signal estimation and coherence %D 2021 %@ 0146-9592 %U https://hdl.handle.net/20.500.14352/4572 %X We address the relation between quantum metrological resolution and quantum coherence. We develop a quantum version of the Wiener-Khintchine theorem for a suitable model of a quantum ruler, putting the contributions of the probe and measurement on equal footing. We illustrate this approach with several examples of linear metrology. %~