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A 1.3 nJ/b IEEE 802.11ah TX for IoT applications is presented. A fully-digital polar architecture consisting of an all-digital PLL-based frequency modulator and an AM-retiming $\Delta \Sigma $ switched-capacitor PA (SC-PA) achieves more than $10\times $ power reduction than state-of-the-art OFDM TXs. Several circuit-design techniques such as LSB truncation error feedback are proposed to efficiently...
This paper presents an ultra-low-power (ULP) IEEE 802.11ah fully-digital polar transmitter (TX). IEEE 802.11ah is a new Wi-Fi protocol optimized for Internet-of-Everything (IoE) applications. Compared to other IoE standards like Bluetooth or ZigBee, its sub-GHz carrier frequency and mandatory modes with 1MHz/2MHz channel bandwidths allow devices to operate in a longer range with scalable data-rates...
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