A 470µW −92.5dBm OOK/FSK Receiver for IEEE 802.11 WiFi LP-WUR

Abstract

An IEEE 802.11 WiFi LP-WUR receiver in 40nm CMOS technology is presented. The direct down-conversion receiver improves sensitivity by allocating single sidebands above the flicker noise corner for received signals. The receiver demodulates wideband FSK/OOK modulated wake-up messages generated by an 802.11 OFDM WiFi transmitter operating at 5.8GHz. The receiver achieves a sensitivity of −92.5dBm while consuming 470µW in OOK demodulation, and sensitivity of −90dBm while consuming 490µW in FSK demodulation at a BER of 10−3 and data-rate of 62.5kb/s. The radio uses an external clock as external component for baseband demodulation, and frequency calibration.