Design of two-dimensional large-scale DFT-modulated filter bank

摘要: This study presents a novel property of the two-dimensional DFT-modulated filter bank and an efficient algorithm for designing with large scale (with number subbands filters spatial support). It is firstly shown that overall transfer function aliasing functions can be simply represented multiplication prototype their modulated filters; new used to remarkably reduce calculation these functions. On other hand, design problem formulated into unconstrained optimisation problem. Based on gradient vector, conjugate method utilised solve The convergence proposed analysed. Numerical examples comparisons methods are included show performance algorithm.