Electronic Devices with Time Domain Radio-Frequency Exposure Averaging

An electronic device subject to a regulatory limit on transmitted power over an averaging period, the electronic device comprising:

• a radio;
• and
• one or more antennas communicably coupled to the radio, wherein the radio is configured to use the one or more antennas to
• transmit radio-frequency signals at a first transmit power level during a first subperiod of the averaging period when the external object is at a first distance from the electronic device, and
• transmit the radio-frequency signals at a second transmit power level during a second subperiod of the averaging period when the external object is at a second distance from the electronic device, the first transmit power level being greater than the first transmit power level, and the second distance being less than the first distance.

An electronic device comprising:

• an antenna;
• and
• a radio communicably coupled to the antenna, the radio being configured to
• transmit first radio-frequency signals using the antenna during a first subperiod of an averaging period, the radio being subject to a first maximum transmit power level during the first subperiod that is based on a radio-frequency exposure (RFE) budget, and
• transmit second radio-frequency signals using the antenna during a second subperiod of the averaging period subsequent to the first subperiod, the radio being subject to a second maximum transmit power level during the second subperiod that is based on a remaining amount of the RFE budget.