Fourier Expansion Method for Positive Real Approximation of Sampled Frequency Data

@article{Tanji2014FourierEM,
  title={Fourier Expansion Method for Positive Real Approximation of Sampled Frequency Data},
  author={Yuichi Tanji},
  journal={IEICE Transactions},
  year={2014},
  volume={97-A},
  pages={1937-1944}
}