A method for initializing free parameters in lattice structure of linear phase perfect reconstruction filter bank

被引：3

作者：

Li, Bodong ^{[1
,2
]}

Gao, Xieping ^{[1
,2
]}

机构：

[1] Xiangtan Univ, MOE Key Lab Intelligent Comp & Informat Proc, Xiangtan 411105, Peoples R China

[2] Xiangtan Univ, Coll Informat Engn, Xiangtan 411105, Peoples R China

来源：

SIGNAL PROCESSING | 2014年 / 98卷

关键词：

Filter bank; Lattice structure; Linear phase; Perfect reconstruction; Free parameter; Initialization; PARAUNITARY FILTERBANKS; DESIGN; FACTORIZATION; TRANSFORM;

D O I：

10.1016/j.sigpro.2013.11.016

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Since the optimization of the free parameters in the lattice structure of linear phase perfect reconstruction filter bank (LPPRFB) is commonly highly nonlinear, the initialization of the free parameters is important before starting the optimization. We systematically study the initialization of the free parameters, following the way that initializes the free parameters in a higher-order LPPRFB by those in a lower-order one. The proposed method is carried out in two steps: formulating the relation between the higher-order and the lower-order LPPRFBs in terms of polyphase matrices, and then implementing the initialization based on the relation. Design examples show that, compared with published LPPRFBs, the filter banks yielded by our method show comparable or even better performance. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：243 / 251

页数：9

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