Modulation schemes used in wireless technologies

This document discusses various modulation schemes used in different wireless technologies. It describes technologies like Bluetooth, Zigbee, Wi-Fi, UWB, and provides details on their modulation techniques. For Bluetooth, it explains that GFSK is used in basic rate mode while variants of GFSK and PSK are used in enhanced data rate mode. For Zigbee, it states that BPSK and OQPSK/MSK are used depending on frequency. It also discusses modulation schemes like OFDM, QAM used in Wi-Fi and their advantages. For UWB, it describes modulation techniques like PPM, PAM, OOK used.