Comments on: Cylcic prefix in Orthogonal Frequency Division Multiplexing

By: ELIJAH.LEE

ELIJAH.LEE — Sat, 24 Apr 2010 13:29:54 +0000

Thx ur nice work!I like your website very much!

By: Krishna Sankar

Krishna Sankar — Sat, 03 Apr 2010 23:37:09 +0000

@lakshmi: Thanks

By: Krishna Sankar

Krishna Sankar — Mon, 29 Mar 2010 23:37:28 +0000

@sowmia: Sure, please ask questions. I will answer to the best of my knowledge

By: Krishna Sankar

Krishna Sankar — Mon, 29 Mar 2010 23:24:08 +0000

@Eric Cheung: MY replies
a) Yes. No interference between the subcarriers
b) No. Each subcarrier can undergo a different phase and amplitude change.

The logic is that : if sin(wt) and sin(2wt) are orthogonal, then Asin(wt) and Bsin(wt+phi) is also orthogonal.

By: Eric Cheung

Eric Cheung — Sun, 07 Mar 2010 12:07:51 +0000

Hi，
In this article you said’…eventhough the individual subcarriers undergo phase and amplitude change, as the frequency is not affected, there is no interference between the subcarriers.’
a) Do you mean the orthogonality between differenet subcarriers will be kept?
b) And is it because all the other subcarriers in the same signal undergo the same amout change in phase?
If my opinion is not correct,then how does it works in detail?

Thanks for your help!
Eric

By: sowmia

sowmia — Tue, 02 Mar 2010 12:40:58 +0000

very useful site and ur explanations are realy good.Iam working on an project in mimo ofdm i want to design an ofdm and use mimo in it . i would be thankful if u could help me.thanking u in advance.

By: lakshmi

lakshmi — Sat, 30 Jan 2010 09:44:41 +0000

I’m working on ofdm.very useful website.thanks