What is difference between OFDM and GFDM?

It is discussed previously that GFDM transmits data symbols in frequency and time grid which consists of K subcarriers and M time slots but OFDM consists of single time slot and in this case spectral efficiency of GFDM will be higher than OFDM for same no. of subcarriers.

1. How GFDM has advantage compared to OFDM?
2. Why should GFDM be preferred over OFDM in 5G communication?
3. What is GFDM modulation?
4. What is GFDM in 5G?

How GFDM has advantage compared to OFDM?

GFDM has single cyclic prefix (CP) part for the entire block which makes it spectrally more efficient than OFDM as CP has to be inserted after every OFDM symbol. Each block is processed by a digital filters which preserves the circular properties of the signals over time and frequency domains [25].

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.

What is GFDM modulation?

CONCLUSIONS GFDM is a non-orthogonal multi carrier scheme, which provides pulse shaped subcarriers at the cost of self-created interference. The modulation of data can be modeled with the help of a modulation matrix that is computed based on a given pulse shaping filter and data block size.

What is GFDM in 5G?

Generalized frequency division multiplexing (GFDM) is one of the physical layer waveform considered for 5G to overcome the deficiencies of the existing OFDM based 4G cellular systems such as Inter Carrier Interference (ICI) and Inter Symbol Interference (ISI).