Galois module structure of local unit groups

We study the groups U_i in the unit filtration of a finite abelian extension K of ℚ_p for an odd prime p. We determine explicit generators of the Ui as modules over the ℤ_p-group ring of Gal(K/ℚ_p). We work in eigenspaces for powers of the Teichmüller character, first at the level of the field of norms for the extension of K by p-power roots of unity and then at the level of K.