Dear all, I am new to this group.I am bit confise about orthogonality in OFDM. I want to know what is orthogonal. Any help regarding this is greatly appreciate. Regards Lau
OFDM simulation
Started by ●May 8, 2005
Reply by ●May 8, 20052005-05-08
Lau wrote:> Dear all, > I am new to this group.I am bit confise about orthogonality in OFDM. I > want to know what is orthogonal. > Any help regarding this is greatly appreciate. > Regards > Lau >OFDM is arranged so that each subcarrier's contribution demodulates to zero on every other subcarrier's channel (bin? I'm not up on OFDM terminology). The "orthogonal" in this case is in the sense that if f(t) and g(t) both have nonzero content over the interval (A, B) then if you integrate f(t) * g(t) from A to B and get a zero result then f(t) and g(t) are orthogonal. OFDM chooses an interval and a bunch of sinusoidal frequencies that generate this result in an easily-demodulated form. -- Tim Wescott Wescott Design Services http://www.wescottdesign.com
Reply by ●May 9, 20052005-05-09
Hi, Read the tuorial at http://complextoreal.com/chapters/ofdm1.pdf. This should clear your doubts about orthogonality between subcarriers in OFDM systems. Vijay Lau wrote:> Dear all, > I am new to this group.I am bit confise about orthogonality in OFDM.I> want to know what is orthogonal. > Any help regarding this is greatly appreciate. > Regards > Lau