Negative delay samples requires time travel unless the information about the wavefront is known in advance.
This is a fundamental finding of Einstein's Theory of Relativity and cannot be bypassed.
The most you can do is to create two paths for the information about the event to travel, with the "regular" path having a positive delay relative to the "fast" path. For example you could put gravitational masses in the path to bend the path of the "regular" signal so that it gets delayed relative to a path without gravitational masses. In practice you would probably instead introduce a dialectric into an electrical path, https://en.wikipedia.org/wiki/Speed_of_electricity or introduce a transparent solid into an optical path.
... Unless, that is, you already know the shape of what is to be received, in which case you could run your clock earlier.
