this document describes techniques and devices for radar - based gesture sensing and data transmission . the techniques enable , through a radar system , seamless and intuitive control of , and data transmission between , computing devices . this radar system can both transmit data and sense gestures , thereby performing with a single system , control of many devices and data transmission with those devices . not only can this provide control of many devices , from refrigerators to laptops , this radar system also allows high - bandwidth data transmission between devices .