StationaryWaveletPacketTransform
StationaryWaveletPacketTransform[data] gives the stationary wavelet packet transform (SWPT) of an array of data.
StationaryWaveletPacketTransform[data,wave] gives the stationary wavelet packet transform using the wavelet wave.
StationaryWaveletPacketTransform[data,wave,r] gives the stationary wavelet packet transform using r levels of refinement.
Please visit the official Wolfram Language Reference for more details and examples on core symbols.