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No Strings Attached
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(Complete Item Description)
- Abstract:
FFT structures with different memory layout and interconnection patterns are occasionally useful for certain applications. These alternate structures include decimation-in-frequency FFTs with in-order outputs, decimation-in-time FFTs with in-order inputs, structures with both in-order inputs and outputs, and constant-geometry structures with the same connection pattern in every stage.
- Subject:
- Science and Technology
- Grade Level:
- Post-secondary
- Collection:
-
Connexions
No Strings Attached
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(Complete Item Description)
- Abstract:
The radix-2 algorithms are the simplest FFT algorithms. The decimation-in-time (DIT) radix-2 FFT recursively partitions a DFT into two half-length DFTs of the even-indexed and odd-indexed time samples.
- Subject:
- Science and Technology
- Grade Level:
- Post-secondary
- Collection:
-
Connexions
No Strings Attached
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(Complete Item Description)
- Abstract:
The decimation-in-time (DIT) radix-4 FFT recursively partitions a DFT into four quarter-length DFTs of groups of every fourth time sample. The outputs of these shorter FFTs are reused to compute many outputs, thus greatly reducing the total computational cost. The radix-4 decimation-in-frequency FFT groups every fourth output sample into shorter-length DFTs to save computations. The radix-4 FFTs require only 75% as many complex multiplies as the radix-2 FFTs.
- Subject:
- Science and Technology
- Grade Level:
- Post-secondary
- Collection:
-
Connexions
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