What this video (or even the paper) doesn't show is the large antenna arrays that are used to capture the heatmaps. A previous paper called "Capturing the human

What this video (or even the paper) doesn't show is the large antenna arrays that are used to capture the heatmaps. A previous paper called "Capturing the human figure through a wall" [1] shows the type of antenna array used and in this paper they use two such antenna arrays to capture two planes to increase the accuracy. [1] https://www.semanticscholar.org/paper/Capturing-the-human-figure-through-a-wall-Adib-Hsu/2b2d03f8b96aa1e306fb941e0318d403efbde4be https://www.semanticscholar.org/paper/Capturing-the-human-fi...