Rules for redundant subcarrier collision with reference signal for UW-OFDM

A method of wireless communication at a user equipment (UE), comprising:

• identifying a first subcarrier mapping associated with one or more redundant subcarriers, the one or more redundant subcarriers corresponding to one or more unique words (UWs) in a UW—orthogonal frequency-division multiplexing (OFDM) (UW-OFDM) waveform;
• identifying a second subcarrier mapping associated with one or more reference signals, a simultaneous application of the first subcarrier mapping and the second subcarrier mapping being associated with one or more collisions, each collision in the one or more collisions corresponding to a mapping of a redundant subcarrier of the one or more redundant subcarriers to a corresponding resource element based on the first subcarrier mapping and a mapping of a reference signal of the one or more reference signals to the corresponding resource element based on the second subcarrier mapping;
• modifying at least one of the first subcarrier mapping or the second subcarrier mapping to eliminate the one or more collisions;
• generating the UW-OFDM waveform based on the modified at least one of the first subcarrier mapping or the second subcarrier mapping;
• and
• transmitting a signal based on the generated UW-OFDM waveform.

An apparatus for wireless communication at a base station, comprising:

• a memory;
• and
• at least one processor coupled to the memory and configured to:
• identify a first subcarrier mapping associated with one or more redundant subcarriers, the one or more redundant subcarriers corresponding to one or more unique words (UWs) in a UW—orthogonal frequency-division multiplexing (OFDM) (UW-OFDM) waveform;
• identify a second subcarrier mapping associated with one or more reference signals, a simultaneous application of the first subcarrier mapping and the second subcarrier mapping being associated with one or more collisions, each collision in the one or more collisions corresponding to a mapping of a redundant subcarrier of the one or more redundant subcarriers to a corresponding resource element based on the first subcarrier mapping and a mapping of a reference signal of the one or more reference signals to the corresponding resource element based on the second subcarrier mapping;
• modify at least one of the first subcarrier mapping or the second subcarrier mapping to eliminate the one or more collisions;
• generate the UW-OFDM waveform based on the modified at least one of the first subcarrier mapping or the second subcarrier mapping;
• and
• transmit a signal based on the generated UW-OFDM waveform.

A method of wireless communication at a base station, comprising:

• identifying a first subcarrier mapping associated with one or more redundant subcarriers, the one or more redundant subcarriers corresponding to one or more unique words (UWs) in a UW—orthogonal frequency-division multiplexing (OFDM) (UW-OFDM) waveform;
• identifying a second subcarrier mapping associated with one or more reference signals, a simultaneous application of the first subcarrier mapping and the second subcarrier mapping being associated with one or more collisions, each collision in the one or more collisions corresponding to a mapping of a redundant subcarrier of the one or more redundant subcarriers to a corresponding resource element based on the first subcarrier mapping and a mapping of a reference signal of the one or more reference signals to the corresponding resource element based on the second subcarrier mapping;
• modifying at least one of the first subcarrier mapping or the second subcarrier mapping to eliminate the one or more collisions;
• generating the UW-OFDM waveform based on the modified at least one of the first subcarrier mapping or the second subcarrier mapping;
• and
• transmitting a signal based on the generated UW-OFDM waveform.