Relation between RLS and ARMA Lattice Filter Realization Algorithm and Its Application (Special Section on Signal Processing and System Theory)
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概要
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In this paper, the relationship between the recursive least square (RLS) method with a U-D decomposition algorithm and ARMA lattice filter realization algorithm is presented. Both the RLS method and the lattice filter realization algorithm are used for the same applications, such as model identification, etc, therefore, it is expected that the lattice filter algorithm is in some ways related to the RLS. Though some of the proposed lattice filter algorithms have been derived by the RLS method, they do not express the relationship between RLS and ARMA lattice filter realization algorithm. In order to describe the relation clearly, a new structure of ARMA lattice filter is proposed. Further, based on the relationship, a method of model identification with frequency weighting (MIFW), which is different from a previous method, is derived. The new MIFW method modifies the lattice parameters which are acquired without a frequency weighting and obtain the parameters of an ARMA model, which is identified with frequency weighting. The proposed MIFW method has the following restrictions: (1) The used frequency weighting is FIR filter with a low order. (2) By using the parameters of the ARMA lattice filter with ARMA (N,M) order and the frequency weighting with L order, the new ARMA parameter with the frequency weighting is with ARMA (N-L, M-L) order. By using the proposed MIFW method, the ARMA parameters estimated with the frequency weighting can be obtained without starting the computation again.
- 社団法人電子情報通信学会の論文
- 1994-05-25
著者
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Nagai N
Hokkaido Univ. Sapporo‐shi Jpn
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Kitajima Hideo
School of Engineering, Hokkaido University
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Kitajima H
School Of Engineering Hokkaido University
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Haseyama Miki
Faculty of Engineering, Hokkaido University
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Kitajima Hideo
Faculty of Engineering, Hokkaido University
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Nagai Nobuo
Research Institute for Electronic Science, Hokkaido University
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Nagai Nobuo
Research Institute For Electronic Science Hokkaido University
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Haseyama Miki
Faculty Of Engineering Hokkaido University
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