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What's the difference between OFDM and OFDMA?

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crenyen

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I am confused with OFDM and OFDMA.
Can anyone tell me how distinguish them?
Thanks
 

ofdma vs ofdm

Hi,


OFDM vs. OFDMA
IEEE 802.16 will specify two flavors of OFDM systems: one simply identified as OFDM, the other OFDMA.

Orthogonal frequency division multiplexing (OFDM) is a multi-carrier transmission technique that has
been recently recognized as an excellent method for high speed bi-directional wireless data
communication.

Orthogonal frequency division multiple access (OFDMA) allows some sub-carriers to be assigned to
different users.
see the attached document or download @ the following web site
**broken link removed**

also you can find additional info @ the following site

https://www.ieee802.org/22/Meeting_...-00-0000_OFDMA_Tutorial_IEEE802-22_Jan 05.ppt

Hope this helps you...
 

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