RF tomography in free space: Experimental validation of the forward model and of a Conjugate Gradient inversion algorithm

Experimental data are used to validate a novel inversion scheme, based on a Conjugate Gradient algorithm. The proposed inversion provides actionable reconstruction results at a fraction of the computational effort needed by classical regularization techniques. Additionally, Conjugate Gradient allows us to introduce physical bounds on the solution returned, if a re-orthogonalization technique is also applied. Experimental case studies are presented and discussed.