NI Power Spectrum IP by NI - Toolkit for LabVIEW Download

This IP provides building blocks for creating overlapped FFTs. It leverages LabVIEW FPGA 2014s wide data path FFT to provide support for instruments that process up to 8 samples per cycle.

Included blocks:
Configurable Window
RMS Magnitude
FFT Transpose
FFT Shift

Delayed copies of the FFT are leveraged to create up to 75% FFT overlap. The FFT length is fixed at 1024, but the IP is written such that it can be modified with relative ease to create longer or shorter FFTs.