Techniques for input formatting and coefficient selection for sample rate converter in parallel implementation scheme
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United States of America Patent
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Jul 21, 2020
Grant Date -
May 14, 2020
app pub date -
Nov 12, 2018
filing date -
Nov 12, 2018
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Abstract
A sample rate converter (“SRC”) for implementing a rate conversion L/M is described wherein data is input to the SRC at an input rate (“Fin”) and output from the SRC at an output rate (“Fout”) equal to Fin*L/M. The SRC includes a low pass filter (“LPF”) including P multiply-add instances, wherein P is a parallelization factor of the SRC; an input formatter for arranging samples received at the SRC in accordance with the rate conversion L/M and providing P*Tpp input samples to the filter at a given time, wherein Tpp is a number of taps per phase of the LPF; and a coefficient bank for storing a plurality of coefficients and for providing P*Tpp of the coefficients to the LPF at a given time.
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