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首页> 外文期刊>IEEE transactions on circuits and systems . I , Regular papers >Optimal Design of Frequency-Response Masking Filters With Reduced Group Delays
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Optimal Design of Frequency-Response Masking Filters With Reduced Group Delays

机译：减少群时延的频响掩蔽滤波器的优化设计

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摘要

In this paper, a new method for the design of optimal finite-impulse response frequency-response masking (FRM) filters with reduced passband group delays is proposed. To meet the prescribed magnitude response and group delay, the proposed design method takes into account both the magnitude error and the group delay error. The key step is the derivation of the group delay and its gradient with respect to the filter coefficients, based on which an explicit group delay constraint is formulated. By incorporating the group delay constraint into the overall optimization, FRM filters with better approximation to the prescribed reduced group delay can be obtained in comparison with a recent method by Lu and Hinamoto in 2003, as illustrated by two design examples.
机译：提出了一种减少通带群时延的最优有限冲激响应频率响应屏蔽（FRM）滤波器的设计新方法。为了满足规定的幅度响应和群时延，提出的设计方法同时考虑了幅度误差和群时延误差。关键步骤是推导群延迟及其相对于滤波器系数的梯度，在此基础上制定明确的群延迟约束。通过将群延迟约束纳入整体优化中，与两个设计示例所示的Lu和Hinamoto在2003年的最新方法相比，可以获得与规定的减小的群延迟更好近似的FRM滤波器。

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