Orthogonal Frequency Division Multiple Access & SC- FDMA - Singe Carrier Frequency Division Multiple Access
OFDMA is OFDM based Access. Where OFDM is a modulation technique.
OFDM Principle for Wireless:-
Signals are Orthogonal if they don’t interfere with each other. This interference can be avoided by controlling the transmission of the signals in one of the several domains. The most prominent domains are frequency, time and space.
So the OFDM is achieved under following guidelines.
A) Separate the sub-
B) Make sure modulation rate is consistent for all sub-
LTE RF link:
In LTE radio link between transmitter and receiver its done by following approach. Synchronize UE local frequency oscillator with the eNodeB and hence insure Orthogonal relation in-