Method and apparatus for downlink multi-user with DFT-s-OFDM waveform
AssigneeRakuten Symphony, Inc.
InventorErdem Bala
Life of this patent
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Abstract
A method performed by at least one processor of a network node operating in a wireless communication network includes receiving data associated with a plurality of users. The method further includes performing, by a discrete Fourier transform (DFT) coder, a DFT transformation on the data associated with the plurality of users. The method further includes 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. The method further includes performing an inverse DFT (IDFT) on the output of the subcarrier mapper. The method further includes transmitting, over the wireless communication network, the output of the IDFT as a DFT spread optical frequency division multiplexing (DFT-s-OFDM) signal.
Claims18
A method performed by at least one processor of a network node operating in a wireless communication network, the 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;
- adding a cyclic prefix (CP) to the output of the IDFT;
- transmitting, over the wireless communication network, the output of the IDFT with the added CP as a DFT spread optical frequency division multiplexing (DFT-s-OFDM) signal;
- and
- mapping, by the DFT coder, one or more control channel elements (CCEs) of a physical downlink control channel (PDCCH) to a plurality of DFT inputs corresponding to a DFT-s-OFDM block, wherein the CCEs comprise 72 resources divided equally over 3 DFT-s-OFDM symbols.
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;
- fourth performing code configured to cause the at least one processor to perform an addition of a cyclic prefix (CP) to the output of the IDFT;
- transmitting code configured to cause the at least one processor to transmit, over the wireless communication network, the output of the IDFT with the added CP as a DFT spread optical frequency division multiplexing (DFT-s-OFDM) signal;
- and
- mapping code configured to cause the at least one processor to map, by the DFT coder, one or more control channel elements (CCEs) of a physical downlink control channel (PDCCH) to a plurality of DFT inputs corresponding to a DFT-s-OFDM block, wherein the CCEs comprise 72 resources divided equally over 3 DFT-s-OFDM symbols.
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;
- adding a cyclic prefix (CP) to the output of the IDFT;
- transmitting, over the wireless communication network, the output of the IDFT with the added CP as a DFT spread optical frequency division multiplexing (DFT-s-OFDM) signal;
- and
- mapping, by the DFT coder, one or more control channel elements (CCEs) of a physical downlink control channel (PDCCH) to a plurality of DFT inputs corresponding to a DFT-s-OFDM block, wherein the CCEs comprise 72 resources divided equally over 3 DFT-s-OFDM symbols.
Dependencies are inferred from the claim text.