Thanks to all of you. Yes, I am aware with the path signals next to the station it will work, that is the normal setup. However, I was hoping there is a way to save one tile and use some "implicit" working of the station as a safe waiting point.
Anyway, thanks for your reactions.
A train entering a block with a path signals claims a path to the next signal or to a dead end. A terminus station will work without additional signals as it counts as a dead end.
If that is not feasible, the claimed path behind the platform should not cross tiles needed by trains from the other direction. The obvious solution is to add a signal directly behind the platform, or to separate platforms and tracks for a single direction only, eliminating the need for junctions.
It may also be possible to design a split to both platforms such that traffic from the other side does not use the same track, eg by a bridge rather than a junction. Not likely to be more compact though, so mostly a theoretical solution, I think.
Other option can be to rotate the station 90 degrees, and enter the platforms from one side, and exit at the other side. In that case you only need signals at the exit side.
None of the above beats adding a tile with signals at both sides, it seems