Howtosignalprocessing
- What is index modulation in OFDM?
- How bandwidth is increased in OFDM technology?
- What is index modulation?
- Why should GFDM be preferred over OFDM in 5G communication?
What is index modulation in OFDM?
OFDM with index-modulation (OFDM-IM) has been recently proposed by Basar et al. [4]. The essential idea of OFDM-IM is to use the indices of the subcarriers to carry information. Some carriers are set to zero (i.e. inactive); the indices of the active subcarriers carry information.
How bandwidth is increased in OFDM technology?
In OFDM, several bits can be sent in parallel, or at the same time, in separate substream channels. This enables each substream's data rate to be lower than would be required by a single stream of similar bandwidth. This makes the system less susceptible to interference and enables more efficient data bandwidth.
What is index modulation?
Index modulation (IM) is a novel transmission technique that is capable of achieving high spectral efficiency by way of creating an additional dimension in the subcarrier domain compared with the conventional modulation techniques.
Why should GFDM be preferred over OFDM in 5G communication?
GFDM is preferred over OFDM system for 5G communications as they have low out of band emission. Also it is much more efficient than OFDM the cyclic prefix in OFDM, is inserted after every time slot whereas in GFDM it is inserted after every frame.
