How to find out the efficiency factor for a OFDM system?

[kingmakerbull]

Effeciency of OFDM

Can anyone tell me how to find out the efficiency factor for a OFDM system. I read somewhere that the efficiency of OFDM varies with different systems. Pls throw light on this matter


Thanks

 

[milkdragon]

Re: Effeciency of OFDM

Since OFDM is a multicarrier system. The efficiency depends on how the signal is modulated for each subcarrier and also the signal bandwidth. That's why efficiency of OFDM varies with different system. For example, the spectral efficiency for 802.11a system is ~0.3-2.7. But for DVB-T, the spectral efficiency can be up to 4

 

[alzomor]

Re: Effeciency of OFDM

Hi

The efficiency of OFDM depends on the under layer modulation
you can use any Digital modulation as an under layer modulation BPSK QPSK 16 QPSK QAM
and that's why the efficiency varies.
also you should take care of the GP it could vary which affects also the spectral effiniency
That's all

Salam
Hossam Alzomor
www(.)i-g(.)org