Real-time specific absorption rate implementation in wireless devices
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United States of America Patent
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Apr 11, 2017
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N/A
app pub date -
Feb 24, 2016
filing date -
Aug 26, 2015
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Abstract
Embodiments disclosed herein provide a method and apparatus for optimizing time-averaged transmitter power of a communications device. A time-averaged SAR is computed over a predefined time window using past transmitter power levels with minimum transmitter power equal to reserve transmitter power for any time interval. Based on the time-averaged SAR a maximum allowable transmitter power for a future fixed time interval is determined. The communication device then transmits at a power equal to or less than the maximum allowable transmitter power. The communication device may back off from high transmitter power to a reserve transmitter power when calculated time-averaged SAR approaches the SAR limit. When old high power transmissions expire, the communication device gains SAR margin and may then transmit at high power. The apparatus comprises: at least one antenna, a transmitter in communication with a power supply, a receiver, a timer in communication with a processor, and a memory.
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