3 pipelined fft core, 1 data format, 2 fft block diagram – Sundance FC100 User Manual
Page 7: 3 description, Pipelined fft core, Data format, Fft block diagram, Description
4.3 Pipelined FFT core
4.3.1 Data format
This core is compliant to the IEEE-754 standard.
4.3.2 FFT block diagram
4.3.3 Description
Frame:
the frame blocks use control signalling to delimit discrete data frames per the
selected transform length.
Bit-reverse:
the bit-reverse block converts natural-order inputs to bit-reversed order as
required by the FFT engine.
Pipelined ranks:
the pipelined rank blocks daisy-chain the FFT processing from input to
output. Each rank is optimized to contain the proper radix-2 butterfly math elements, twiddle
factor ROMs, and local datapath memories for efficient continuous processing.
Variable length select:
the variable length select block multiplexes the rank outputs for
variable transform length support.
User Manual FC100
Page 7 of 12
Last Edited: 25/11/2008 15:00:00