Actually all FBW Airbuses have a system that regulates the thrust via the autothrottle to maintain a minumum groundspeed on approach.
The system is active when the approach is activated and varies the speed target wrt the headwind being sensed compared with the wind inserted into the approach page of the FMGC from the ATIS.
In very strong headwinds therefore the G/S Mini will advance up the speed scale and the autothrust will respond to maintain the minimum groundspeed and thus maintain not only a stabilised vertical descent rate but also a minimum energy level in the a/c should the headwind suddenly die away.
Clever huh?
