Open AccessDiscrete Fourier transform spreading‐based generalised frequency division multiplexing
Author(s) -
Das S. S.,
Tiwari S.
Publication year - 2015
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2014.3833
Subject(s) - subcarrier , orthogonal frequency division multiplexing , discrete fourier transform (general) , electronic engineering , transmission (telecommunications) , fading , transmitter , bit error rate , fast fourier transform , interference (communication) , computer science , signal to noise ratio (imaging) , frequency division multiplexing , channel (broadcasting) , fourier transform , algorithm , telecommunications , engineering , mathematics , fractional fourier transform , fourier analysis , mathematical analysis
Generalised frequency division multiplexing (GFDM) has gained significant importance as a contender for the fifth generation (5G) air interface. The peak‐to‐average power ratio (PAPR) of GFDM is high due to the use of a same pulse shaping filter per subcarrier and the addition of different subcarriers at the transmitter. Proposed is the use of discrete Fourier transform (DFT) spreading‐based GFDM transmission to reduce the PAPR. It is found that DFT spreading helps to reduce the PAPR of GFDM significantly. It is also seen that the bit error rate performance, which is computed through simulation and using an analytical expression of the signal‐to‐interference‐plus noise ratio, is not compromised by DFT spreading but rather is improved in the frequency selective fading channel.