Parameter estimation for the discretely observed fractional   Ornstein-Uhlenbeck process and the Yuima R package
  This paper proposes consistent and asymptotically Gaussian estimators for the drift, the diffusion coefficient and the Hurst exponent of the discretely observed fractional Ornstein-Uhlenbeck process. For the estimation of the drift, the results are obtained only in the case when 1/2 < H < 3/4. This paper also provides ready-to-use software for the R statistical environment based on the YUIMA package. 
Alexandre Brouste and Stefano M. Iacus
stat.CO math.ST stat.OT stat.TH