Apparatus and method for performing FFT operation
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United States of America Patent
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Issued Date -
Nov 30, 2006
app pub date -
Aug 26, 2005
filing date -
May 27, 2005
priority date (Note) -
Abandoned
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Abstract
An FFT operation apparatus performs the real number FFT operation in real time for an extremely large number of data using a cache memory. The cache memory stores a part of data to be operated through the real number FFT. An FFT operation unit performs the real number FFT operation for the data stored in the cache memory. The FFT operation unit performs the data transfer between the cache memory and the external memory at least once after any of the stages in the first butterfly operation of multiple stages to read data to be required in subsequent butterfly operation in the first butterfly operation and the second butterfly operation for acquiring the transform results into the cache memory, performs the subsequent butterfly operation using the read data, and performs the second butterfly operation directly using the data stored in the cache memory after the first butterfly operation.
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