Subband encoding by wavelet filter cascade for band width compression in FDTD simulation

The wavelet filter cascade method for subband encoding of finite-difference time-domain simulation is presented. This method implements computational bandwidth compression via a filter bank comprised of discrete wavelet transforms which maps simulation data or measured data into a compressed representation with little degradation of signal integrity. This letter discusses the use of the WFC technique to augment the FDTD method in particular but may be extended to other time domain methods. Simulation results are compared to standard FDTD results for accuracy and signal fidelity, with reduction in problem size summarized.