Adaptive power reconfigurability for preventing excessive power dissipation in wireless receivers

This paper investigates the effect of using adaptive power reconfigurability method for preventing power over-usage when the operating conditions are less demanding than the worst case in wireless receivers. The analysis is limited to the baseband block, and the target standard is selected as ZigBee. Optimal distribution of the dynamic range requirement among the baseband filter and the ADC showed that enhancing the filter with adaptive power reconfigurability feature can lead to significant power savings. A sample operating schedule is derived to quantify the power saving performance. It is found that using adaptive power reconfigurability method in the baseband filter of a ZigBee receiver can decrease the average power dissipation of the baseband block from 4.197 mW to 115.87 μW, which corresponds to a reduction by a factor of 36.2 (15.59 dB).