UltraLong FFT IP Core for Xilinx FPGAs
Multimillion point FFT processing optimized for Xilinx Virtex-4, -5, -6 and -7 FPGAs with SRAM or DRAM external memory interfaces.
Description
Dillon Engineering's UltraLong FFT IP Core uses an efficient Fast Fourier Transform (FFT) algorithm to provide multimillion-point discrete transforms on data frames or continuous data streams. This structure utilizes state-of-the-art off-chip memory technology and N1- and N2-length pipelined radix-2 FFT engines with an additional rotation stage to perform N=N1xN2 transform lengths, from 1K to 64M points. The core is available with any width fixed or floating point data. The UltraLong IP Core is easily targeted to current Xilinx FPGA devices and various external memory types.
Features
- UltraLong algorithm for performing continuous Fast Fourier Transforms (FFTs)
- For transform lengths that exceed on-FPGA memory capacity
- Up to 4M points using QDR SRAM
- Up to 64M points using DDR SDRAM
- Any-width fixed- or floating-point data
- Run-time selectable length
- Run-time selectable Forward/Inverse transform mode
- Continuous processing at speeds up to Fmax (see table).
- Data rate of 200MSamples/sec in Virtex-5.
- Higher data rates with wider memory paths, up to 800Msps.
- Natural-order inputs and outputs
- Includes C/C++ bit-accurate model and data generator
- Model also usable from MATLAB
- Includes Verilog testbench and run scripts
Block Diagram
UltraLong FFT IP block diagram:
Xilinx FPGA Resource Usage
Example Implementation Statistics for Xilinx Virtex-5 SXT-2 FPGA, Single Precision Floating Point
|
FFT Length |
Fmax (MHz) |
External Memory Type |
# Mem Banks |
Mem Size (ea.) |
Slice FF |
Slice LUT |
IOB |
BUFG |
BRAM |
DSP48E |
|
2M |
200 |
QDRII SRAM |
3 |
4Mx32 |
43,705 |
48,831 |
474 |
5 |
90 |
385 |
|
16M |
175 |
DDR2 SDRAM |
3 |
32Mx64 |
59,430 |
62,434 |
567 |
6 |
459 |
445 |
|
64M |
100 |
DDR2 SDRAM |
3 |
128Mx64 |
63,643 |
66,365 |
567 |
6 |
483 |
485 |
|
64M |
50 |
DDR2 SDRAM |
2 |
128Mx64 |
34,968 |
36,354 |
425 |
6 |
302 |
249 |
|
64M |
50 |
DDR2 SDRAM |
3 |
256Mx32 |
61,161 |
63,716 |
474 |
6 |
282 |
485 |
|
64M |
25 |
DDR2 SDRAM |
2 |
256Mx32 |
33,314 |
34,863 |
316 |
6 |
168 |
249 |
Additional Information
For additional information view the ULFFT Datasheet.
Fill out the ULFFT IP Fit/Information Form to obtain a device usage estimate for another target technology or to obtain additional information about the UltraLong FFT IP Core.
Xilinx site listing for UltraLong FFT Candidate Core.
Fill out the ULFFT IP Fit/Information Form to obtain a device usage estimate for another target technology or to obtain additional information about the UltraLong FFT IP Core.
Xilinx site listing for UltraLong FFT Candidate Core.
