1. Introduction
2. Description of the Simulations
2.2. Gaussian Random Field Simulations
3. From Spectra to BAO Signal
3.1. Power Spectrum Estimator
3.2. Reconstruction of the BAO Scale
4. Results
4.1. Results with the True Quasar Unabsorbed Spectrum
4.2. Effect of Unabsorbed Spectrum Error
5. Constraint on Cosmological Parameters
6. Summary and Conclusion