A system for hypoglossal nerve stimulation (HNS) includes a wearable device comprising at least one sensor, at least one wirelessly powered stimulator, and a controller device. The wearable device is configured to receive a control input describing stimulation data, provide a radio frequency (RF) signal to the at least one wirelessly powered stimulator, and monitor at least one physiological signal of a subject. Each wirelessly powered stimulator comprises an implantable pulse generator comprising a rectifier, a rechargeable battery configured to be charged by the rectifier using energy from the RF signal, a demodulator, and an output voltage regulator. Each implantable pulse generator is configured to receive the RF signal, charge the rechargeable battery, and output a stimulation using stored energy in an output pulse having characteristics based on the received RF signal.