This disclosure describes techniques for dynamic adjustment of output power index of a wireless remote controller device based on a detected battery level of the device. The battery voltage level of the device is periodically measured. When the level falls below a predetermined threshold, the output power index is adjusted to ensure that the total transmit power from the controller device lies within a specified range. Dynamic adjustment of transmit power via the power index adjustment enables the controller device to have a transmit power that lies between the power spectral distribution (PSD) target and the PSD limit (maximum) over a range of battery voltage values.
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Lee, Chien-Hsien; Huang, Wei-Ning; and Lin, Po-Han, "Dynamic Power Index Adjustment Based On Battery Level", Technical Disclosure Commons, (October 13, 2020)