Discrete Fourier transform size decomposition

A user equipment (UE) for wireless communication, comprising:

• a memory;
• and
• one or more processors operatively coupled to the memory, the memory and the one or more processors configured to:
• determine, based at least in part on a decomposition rule for a discrete Fourier transform (DFT) block, a plurality of decomposition groups for tones, corresponding to a plurality of antenna ports of the UE, of a transmission,
• wherein respective sizes of the plurality of decomposition groups are selected such that a total size of the plurality of decomposition groups is equivalent to a size of the DFT block, the respective sizes of the plurality of decomposition groups and the size of the DFT block each satisfy a size constraint, and the respective sizes of the plurality of decomposition groups each satisfy a size balancing criterion;
• map the tones to the plurality of decomposition groups for transmission processing;
• and
• transmit, using the plurality of antenna ports, the transmission based at least in part on transmission processing.

A non-transitory computer-readable medium storing one or more instructions for wireless communication, the one or more instructions comprising:

• one or more instructions that, when executed by one or more processors of a user equipment (UE), cause the one or more processors to:
• determine, based at least in part on a decomposition rule for a discrete Fourier transform (DFT) block, a plurality of decomposition groups for tones, corresponding to a plurality of antenna ports of the UE, of a transmission,
• wherein respective sizes of the plurality of decomposition groups are selected such that a total size of the plurality of decomposition groups is equivalent to a size of the DFT block, the respective sizes of the plurality of decomposition groups and the size of the DFT block each satisfy a size constraint, and the respective sizes of the plurality of decomposition groups each satisfy a size balancing criterion;
• map the tones to the plurality of decomposition groups for transmission processing;
• and
• transmit, using the plurality of antenna ports, the transmission based at least in part on transmission processing.

An apparatus for wireless communication, comprising:

• means for determining, based at least in part on a decomposition rule for a discrete Fourier transform (DFT) block, a plurality of decomposition groups for tones, corresponding to a plurality of antenna ports of a user equipment (UE), of a transmission,
• wherein respective sizes of the plurality of decomposition groups are selected such that a total size of the plurality of decomposition groups is equivalent to a size of the DFT block, the respective sizes of the plurality of decomposition groups and the size of the DFT block each satisfy a size constraint, and the respective sizes of the plurality of decomposition groups each satisfy a size balancing criterion;
• means for mapping the tones to the plurality of decomposition groups for transmission processing;
• and
• means for transmitting, using the plurality of antenna ports, the transmission based at least in part on transmission processing.