Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

Diff b/w single carrier and multicarrier comm.?

Status
Not open for further replies.

bee

Full Member level 2
Joined
Nov 29, 2003
Messages
135
Helped
7
Reputation
14
Reaction score
5
Trophy points
1,298
Activity points
883
can anyone tell me the Diff b/w single carrier and multicarrier communications?

wating....
 

goosecool

Junior Member level 3
Joined
Jul 29, 2005
Messages
28
Helped
2
Reputation
4
Reaction score
1
Trophy points
1,283
Activity points
1,484
Traditional communication systems like AM and FM were essentially single carrier systems because the information modulated just one carrier and was transmitted. There was just one oscilator which fed the carrier signal.

In multicarrier systems there are oscilator banks (eg. fdm very old way, collins radio kineplex system I think used this) where different signals modulated different carrier frequencies and then were transmitted by one transmitter. On the receiver side there was another oscilator bank to demodulate the signal and separate them. Ofcourse the carriers were spaced apart enough in frequency to reduce or prevent ICI.

Nowadays, OFDM and MC-CDMA are multiple carrier systems. OFDM uses IFFT to cleverly convert a single carrier system to a multiple carrier which ofcourse is a different story.
 

Status
Not open for further replies.
Toggle Sidebar

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top