Sardar, Mishra, and Khan Figure 10. Multiple channel estimates with and without a human target in an indoor environment. The top row represents channel estimates with the human target in the indoor environment, and the bottom row corresponds to channel estimates without the human target in the indoor environment. Figure 11. FrFT representations of channel estimates for with (row 1) and without (row 2) human-target cases for different rotation angles (a radian). JULY 2018 IEEE A&E SYSTEMS MAGAZINE 55