4DSP provides highly optimized FFT cores for Xilinx and Altera FPGA devices. The choice between fixed point and floating point cores is not always an easy one. It depends on many factors such as input signal resolution, FFT length, sustained processing bandwidth, etc...
We can help you work out the most optimized solution for your application based on your requirements. Please visit our fixed point and floating point pages and feel free to contact us at tech@4dsp.com or sales@4dsp.com.

Fixed point FFT Any input resolution Up to 2GSPS streaming processing Bit true model

Floating-point FFT 11.4µs 1024-point FFT/IFFT Transform length up to 1Mega points IEEE-754 or 2's complement data formats Up to 4 FFT/IFFT cores in parallel in Virtex-4 and Virtex-5 devices Bit true model

All our FFT cores are delivered with a fully functional VHDL testbench, bit true model and Matlab functions for simulation purposes and specific performance characterization.