I am doing a project using zigbee protocols but am having trouble in understanding them i have the following queries : 1. What is difference between Xbee and Zigbee,if any? 2. What does Zigbee actually uses ? I have found out that they use DSSS and OQPSK Please do clarify it if true as i could not properly understand the IEEE paper. Plz do help if anybody knows anything about it?