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Wimax: Worldwide Interoperability for Microwave Access
a Wireless Broadband communication system based on IEEE 802.16 Family Standards
but i need to ask you a question, Why don't you try to do a very simple search to find what you need.
you can use this website to get some info to beggin with www.wikipedia.com and write what you are looking for
for wimax you can find this https://en.wikipedia.org/wiki/Wimax
It's better to read 1st and if you face a problem come here to ask and discuss .