Performance analysis and prototype filter design for perfect-reconstruction cosine-modulated filter banks with fixed-point implementation

摘要: Cosine modulated filter banks have gained popularity for their ability to provide perfect reconstruction (PR) while maintaining an efficient design and implementation. However, this effectiveness is hindered if the bank implemented in fixed-point domain where quantization, rounding, overflow occur, result errors. In article we demonstrate how maintain PR of when implementing it number format with constant wordlength. We explore frequency selectivity analysis synthesis filters changes from floating point ones due errors present new criteria that will be format.