Code-division multiplexing and frequency-division multiplexing for nonlinear inverse scattering

This paper presented a new scheme for nonlinear inverse scattering. We have applied the code-division multiplexing (CDM) and frequency-division multiplexing (FDM) schemes to reduce the CPU run time and memory requirement of the time-domain nonlinear inverse scattering solvers, the distorted Born iterative method (DBIM) and LSF, by a factor proportional to the number of transmitters. This novel approach for inverse scattering is a major advancement because of the large reduction of the memory requirement and the computational time of the nonlinear inverse scattering.