Spectral shaping for dft-s-ofdm

A method of operating an apparatus, the method comprising:

• splitting a set of modulated data symbols, based on a phase change between N consecutive modulated data symbols, to produce Q sets of data symbols;
• generating, based on the Q sets of data symbols, Q sets of DFT spread data symbols;
• frequency domain spectrum shaping (FDSS) filtering each set of the Q sets of DFT spread data symbols, via a different FDSS filter, to produce Q sets of FDSS filtered data symbols;
• combining the Q sets of FDSS filtered data symbols;
• performing an inverse fast Fourier transform (IFFT) operation on the combined Q sets of FDSS filtered data symbols to produce a FDSS-discrete Fourier transform-spread-orthogonal frequency division multiplexing (DFT-s-OFDM) signal;
• and
• transmitting the FDSS-DFT-s-OFDM signal.

A user equipment (UE) comprising:

• a processor;
• and
• a transceiver operatively coupled to the processor, the transceiver configured to:
• receive a first message enabling a frequency domain spectral shaping (FDSS)-discrete Fourier transform-spread-orthogonal frequency division multiplexing (DFT-s-OFDM) capability of the UE;
• receive a second message configuring the FDSS-DFT-s-OFDM capability for an uplink transmission;
• and
• in response to receiving the second message:
• split a set of modulated data symbols for the uplink transmission, based on a phase change between N consecutive modulated data symbols, to produce Q sets of data symbols;
• generate, based on the Q sets of data symbols, Q sets of DFT spread data symbols;
• frequency domain spectrum shaping (FDSS) filter each set of the Q sets of DFT spread data symbols, via a different FDSS filter, to produce Q sets of FDSS filtered data symbols;
• combine the Q sets of FDSS filtered data symbols;
• perform an inverse fast Fourier transform (IFFT) operation on the combined Q sets of FDSS filtered data symbols to produce a FDSS-DFT-s-OFDM signal;
• and
• transmit the FDSS-DFT-s-OFDM signal.