Design of Q-shift filters with flat group delay

@article{Zhang2012DesignOQ,
  title={Design of Q-shift filters with flat group delay},
  author={Xi Zhang and Hiroaki Morihara},
  journal={2012 IEEE International Symposium on Circuits and Systems},
  year={2012},
  pages={2337-2340}
}
Q-shift filters have been proposed by Kingsbury for DTCWTs (Dual Tree Complex Wavelet Transforms), and are required to have linear phase responses. This paper proposes a new method for designing Q-shift filters with flat group delay responses. The proposed design method make use of the transfer function proposed by Gopinath, which satisfies both the specified degree of flatness for the group delay and the specified number of vanishing moments, i.e., the specified number of zeros at z = -1… CONTINUE READING