Transform calculation device
AssigneeNXP B.V.
InventorsOlivier Gay-Bellile, Xavier Marchal
Life of this patent
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Abstract
The present invention relates to a discrete transform calculation device (FFTP). The device has control means (CNTRL) which configure first and second memories (RAM1 and RAM2) according to the number of transforms used during a first processing. The device applies in particular to a demodulator which allows management of several Fourier transforms in parallel.
Claims7
A device (FFTP) for calculating discrete transforms having a first memory (RAM1) for storing samples (xi) and a second memory (RAM2) for recording intermediate calculation results, characterized in that it has control means (CNTRL) able to configure the first and second memories as a function of a number of discrete transforms used during a first processing, the transforms having, where applicable, variable sizes.
A discrete transform calculation method able to store samples (xi) in a first memory (RAM1) and to record intermediate calculation results in a second memory (RAM2), characterized in that it includes a step of configuring the first (RAM1) and the second (RAM2) memories as a function of a number of discrete transforms used during a first processing, the transforms having, where applicable, variable sizes.
A calculation method as claimed in claim 6, characterized in that it includes a supplementary step of determining calculation priorities for one type of transform with respect to another type of transform.
A calculation method as claimed in claim 6, characterized in that the first processing is a demodulation processing.
Dependencies are inferred from the claim text.