Method and apparatus for downlink multi-user with dft-s-ofdm waveform

A network node operating in a wireless communication network, the network node comprising:

• at least one memory configured to store computer program code;
• and
• at least one processor configured to access said at least one memory and operate as instructed by said computer program code, said computer program code including:
• receiving code configured to cause the at least one processor to receive data associated with a plurality of users;
• first performing code configured to cause the at least one processor to perform, by a discrete Fourier transform (DFT) coder, a DFT transformation on the data associated with the plurality of users;
• second performing code configured to cause the at least one processor to perform, on the output of the DFT coder by a subcarrier mapper, subcarrier mapping that maps the output of the DFT coder to a set of subcarriers;
• third performing code configured to cause the at least one processor to perform an inverse DFT (IDFT) on the output of the subcarrier mapper;
• and
• transmitting code configured to cause the at least one processor to transmit, over the wireless communication network, the output of the IDFT as a DFT spread optical frequency division multiplexing (DFT-s-OFDM) signal.

A non-transitory computer readable medium having instructions stored therein, which when executed by a processor in a network node operating in a wireless communication network cause the network node to execute a method comprising:

• receiving data associated with a plurality of users;
• performing, by a discrete Fourier transform (DFT) coder, a DFT transformation on the data associated with the plurality of users;
• performing, on the output of the DFT coder by a subcarrier mapper, subcarrier mapping that maps the output of the DFT coder to a set of subcarriers;
• performing an inverse DFT (IDFT) on the output of the subcarrier mapper;
• and
• transmitting, over the wireless communication network, the output of the IDFT as a DFT spread optical frequency division multiplexing (DFT-s-OFDM) signal.