【作者】 曹雪虹； 毕厚杰；

【Author】 Cao Xuehong,Bi houjie (Nanjing University of Posts and Telecommunications,Nanjing 210003)

【机构】 南京邮电学院；

【摘要】 本文提出了余弦调制型滤波器组中临界采样情况下原型低通滤波器的一种新的设计方法,以FIR原型低通滤波器系数为优化参数,将目标函数和约束条件均用待优化参数的二次函数表示,采用矢量的二次约束优化算法。该算法优化方便,收敛速度快。与其它方法相比,滤波器的止带衰减大。更多还原

【Abstract】 A new prototype lowpass filter in the critically sampled cosine-modulated filter banks is designed based on an quadratic-constrained minimization problem.The solution of the minimization problem converges very quickly since the cost function as well as the constraints are quadratic functions with respect to the unknown parameters.Compared with other design methods,the proposed technique yields PR filter banks with much higher stopband attenuation.更多还原