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近似重构正交镜像滤波器组的设计 被引量:2
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作者 洪淑月 《浙江师范大学学报(自然科学版)》 CAS 2006年第3期277-281,共5页
为设计一种正交镜像滤波器组(QMF)的原型滤波器,使用高边瓣衰减(SLFOR)的可变性和组合窗函数设计了低通原型滤波器,并且应用线性优化使近似重构的误差最小.结果表明,该方法程序运行简单,优化算法使计算机处理的速度加快,而且高边瓣衰减(... 为设计一种正交镜像滤波器组(QMF)的原型滤波器,使用高边瓣衰减(SLFOR)的可变性和组合窗函数设计了低通原型滤波器,并且应用线性优化使近似重构的误差最小.结果表明,该方法程序运行简单,优化算法使计算机处理的速度加快,而且高边瓣衰减(SLFOR)组合窗减少了能量的泄漏,防止了子带间的混叠. 展开更多
关键词 正交镜像滤波器组 原型滤波器 FIR滤波器 近似重构 高边瓣衰减
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Design of NPR-Type Cosine Modulated Filterbank Using Combinational Window Functions 被引量:1
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作者 Ram Kumar Soni Alok Jain Rajiv Saxena 《International Journal of Communications, Network and System Sciences》 2010年第12期934-942,共9页
This paper presents the design of near perfect reconstruction (NPR) cosine modulated filterbank (CMFB). The prototype filter is designed by the combinational window functions. These window functions provide high side-... This paper presents the design of near perfect reconstruction (NPR) cosine modulated filterbank (CMFB). The prototype filter is designed by the combinational window functions. These window functions provide high side-lobe-fall-off-rate (SLFOR) with better far-end attenuation which suppresses the undesired inter-ferences occur in the filterbank. A linear optimization is used to minimize the error parameters. Design ex-amples have been included to illustrate the effectiveness of the proposed technique over the earlier reported work. 展开更多
关键词 Combinational WINDOW Functions slfor Far-End ATTENUATION STOPBAND Energy
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