Perfect-Reconstruction Cosine-Modulated Filter Banks via Improved Constraint Linearization
Wu-Sheng Lu, Takao Hinamoto, T. Saramäki · 2020
The design of perfect-reconstruction cosine-modulated filter banks is revisited by applying new linearization techniques for the time-domain quadratic perfect reconstruction constraints. The new techniques are analyzed to explain why they can provide improved approximation accuracy hence improved performance with insignificant increase in complexity. A design example is presented for performance demonstration and comparison.