Three-Dimensional Microwave Holographic Imaging Employing Forward-Scattered Waves Only

Table 1

Details of computational complexity of the proposed image reconstruction process.

Operation	Number of flops
FT of the scattered fields	5𝑁𝑥′𝑁𝑦′log𝑁𝑥′𝑁𝑦′
Computing functions 𝑎𝑘	5𝑁𝑥𝑁𝑦
FT of functions 𝑎𝑘	5𝑁𝑥𝑁𝑦log𝑁𝑥𝑁𝑦
Solving the systems of equations in all combinations of 𝑘𝑥 and 𝑘𝑦	𝑁𝑘𝑥𝑁𝑘𝑦10𝑁𝜔𝑁^2𝑧+10𝑁𝜔𝑁𝑧+𝑁^2𝑧
Inverse FT of the contrast function	5𝑁𝑥𝑁𝑦log𝑁𝑥𝑁𝑦