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Optimized reconfigurable fast convolution based transmultiplexers for flexible radio access

Research output: Contribution to journalArticleScientificpeer-review


Original languageEnglish
Pages (from-to)130-134
JournalIEEE Transactions on Circuits and Systems, Part 2: Express Briefs
Issue number1
Early online date2017
Publication statusPublished - Jan 2018
Publication typeA1 Journal article-refereed


Multirate fast-convolution (FC) processing can be used for realizing low-complexity filter banks (FBs) and transmultiplexers (TMUXs). The main advantage of the FC based realizations when compared with the polyphase FBs is the increased configurability, that is, the number of subchannels, their bandwidths, and the center frequencies can be adjusted independently. In general, FC based FBs are linear periodically shift-variant systems. In this paper, novel matrix representations for the FC synthesis and analysis FBs are first derived. These representations give all the shift-variant impulse responses of the FC based FBs. Then the TMUX optimization criteria are expressed using these representations. Two examples are included to demonstrate the performance of the optimized designs as well as to illustrate the flexibility of the resulting FC based TMUXs.

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