求高手VHDL语言编余弦调制滤波器组

Design of M-Band Cosine-Modulated Filter Banks
Author： ZHANG Zi jing;JIAO Li cheng(Key Lab.for Radar Signal Processing;Xidian University;Xi′an 710071;China)
Keywords： cosine-modulated filter banks;near perfect reconstruction;high stopband attenuation;multirate
Abstract：
A method for designing M band cosine modulated filter banks with near perfect reconstruction is proposed.The prototype filter is formulated as the form A(z L)B(z) and indirectly designed by varying the passband edge of A(z) with low order.In the course of the optimization procedure,the popular Parks McClellan algorithm is used to design A(z) .A design example is presented to show that cosine modulated filter banks with high stop attenuation can be achieved using the proposed method.