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首页> 外文期刊>Circuits and Systems I: Regular Papers, IEEE Transactions on >Reconfigurable Nonuniform Transmultiplexers Using Uniform Modulated Filter Banks
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Reconfigurable Nonuniform Transmultiplexers Using Uniform Modulated Filter Banks

机译：使用统一调制滤波器组的可重构非均匀多路复用器

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摘要

This paper introduces reconfigurable nonuniform transmultiplexers (TMUXs) based on fixed uniform modulated filter banks (FBs). The TMUXs use parallel processing where polyphase components, of any user, are processed by a number of synthesis FB and analysis FB branches. One branch represents one granularity band, and any user can occupy integer multiples of a granularity band. The proposed TMUX also requires adjustable commutators so that any user occupies any portion of the frequency spectrum. The location and width of this portion can be modified without additional arithmetic complexity or filter redesign. This paper considers both cosine modulated and modified discrete Fourier transform FBs. It discusses the filter design, TMUX realization, and the parameter selection. It is shown that one can indeed decrease the arithmetic complexity by proper choice of system parameters. For the critically sampled case and if the number of channels is higher than necessary, we can reduce the arithmetic complexity. In case of an oversampled system, the arithmetic complexity can be reduced by proper choice of the number of channels and the roll-off factor of the prototype filter. The proposed TMUX is compared to existing reconfigurable TMUXs, and examples are provided for illustration.
机译：本文介绍了基于固定均匀调制滤波器组（FB）的可重构非均匀多路复用器（TMUX）。 TMUX使用并行处理，其中，任何用户的多相组件都由许多合成FB和分析FB分支进行处理。一个分支代表一个粒度带，任何用户都可以占用粒度带的整数倍。提出的TMUX还需要可调节的换向器，以使任何用户都占据频谱的任何部分。该部分的位置和宽度可以修改，而无需额外的算术复杂性或重新设计滤波器。本文考虑了余弦调制和改进的离散傅立叶变换FB。它讨论了滤波器设计，TMUX实现和参数选择。结果表明，通过适当选择系统参数，确实可以降低算术复杂度。对于临界采样的情况，并且如果通道数大于必要数量，则可以降低算术复杂度。在过采样系统的情况下，可以通过适当选择通道数量和原型滤波器的滚降系数来降低算术复杂度。将拟议的TMUX与现有的可重新配置TMUX进行比较，并提供示例进行说明。

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