Difference between OFDM, OFDMA, SS-OFDM, MC-CDMA, GMC-CDMA

Status
Not open for further replies.
S

saeddawoud

Full Member level 3
Joined
Apr 27, 2007
Messages
153
Helped
6
Reputation
12
Reaction score
1
Trophy points
1,298
Activity points
2,144
Hello

Can anybody tell me briefly the difference between the followings:

1- OFDM
2- OFDMA
3- SS-OFDM
4- MC-CDMA
5- GMC-CDMA

Thank in advance
 

Re: I need answers

1- OFDM : orthogonal frequency division multiplexing... the data is transmitted using a set of frequencies which are orthogonal

2- OFDMA... MA is multiple access technique for orthognal frequency division
3- SS-OFDM: is a hybrid technique using spread spectrum and OFDM
4- MC-CDMA : MCcdma is multi- carrier code division multiple access ... multiple carriers are transmitted from the same tx which are cdma-ed
 
Re: I need answers

Ok, thanks
but can you expalin with little more detail about how using the subcarriers, i.e.: number of subcarriers/user, symbol? for example: in conventional OFDM we use N subcarriers to transmit N symbols for the same user. what about the others?
Thanks in advance
 

Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…