Cascaded Form Sparse FIR Filter Design

Cascaded Form Sparse FIR Filter Design
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级联形式稀疏 FIR 滤波器设计

DOI:
10.1109/tcsi.2020.2964568
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发表时间:
2020-01
期刊:
IEEE Transactions on Circuits and Systems I: Regular Papers
影响因子:
--
通讯作者:
Xin Lou
Xin Lou
中科院分区:
其他
文献类型:
--
作者:
Wangqian Chen;Mo Huang;Wenbin Ye;Xin Lou

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提出了一种级联型稀疏有限冲激响应(FIR)滤波器设计算法。通过将一个滤波器分解为两个子滤波器,将稀疏滤波器设计问题转化为一个二次约束的${L}{0}$范数最小化问题,并通过引入一个二进制掩蔽向量将其转化为一个凸问题。提出了一种具有序列方向和误差方向控制的迭代前后搜索算法,通过最小化极小极大逼近误差与指定上界之间的距离来优化二进制掩蔽向量。实验结果表明,所提出的设计算法可以在相当甚至更低的有效滤波阶数下提高稀疏性。
In this paper, a cascaded form sparse finite impulse response (FIR) filter design algorithm is proposed. By decomposing a filter into two subfilters, the sparse filter design problem is reformulated as a quadratic constrained ${l} _{0}$ -norm minimization problem, which is further transformed to a convex problem through the introduction of a binary masking vector. An iterative forth-and-back search with sequence direction and error direction control is proposed to optimize the binary masking vector by minimizing the distance between the minimax approximation error and the specified upper bound. Experimental results show that the proposed design algorithm can improve the sparsity with comparable or even lower effective filter order.
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