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digital-signal-processing

Polyphase decomposition and the noble identities

taught

Splitting a filter into M branches by tap index mod M and moving the downsampler ahead of the filtering, an exact reordering, computes the identical output for roughly 1/M the multiplications.

Local knowledge map

Local knowledge map

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Solid arrows are required prerequisites; dashed are recommended or helpful. Lower rows are more foundational. Click any box to jump to that concept.