5G • RAN
DFT-s-OFDM
Discrete Fourier Transform Spread OFDM
Optional uplink single-carrier waveform (transform precoding) providing low Peak-to-Average Power Ratio (PAPR).
Technical Explanation
DFT-s-OFDM applies a DFT precoding operation prior to subcarrier mapping. This preserves single-carrier waveform properties, resulting in a significantly lower PAPR (1.5 to 2.5 dB lower than CP-OFDM). It allows power amplifiers on cell-edge UEs to transmit closer to maximum power without distortion, extending uplink coverage.
Key Functions
- Lowers Peak-to-Average Power Ratio (PAPR) for uplink transmissions
- Maximizes uplink power amplifier efficiency at cell edge
- Configurable per UE for PUSCH and PUCCH
Specifications
3GPP TS 38.211
Interfaces
Uu
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