Signal generation for OFDM-based systems

An apparatus for wireless communications, comprising:

• a processor,
• memory in electronic communication with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• identify, at a first wireless device, a first signal in a time domain, the first signal comprising a plurality of sequences spanning a bandwidth for a plurality of symbol periods;
• segment the first signal into a plurality of signal segments, wherein each signal segment corresponds to a respective symbol period of the plurality of symbol periods;
• apply a first transform operation to each signal segment of the plurality of signal segments to obtain a plurality of transformed signal segments;
• restrict frequency components of the plurality of transformed signal segments to the bandwidth;
• apply a second transform operation different from the first transform operation to each transformed signal segment to obtain a plurality of output signal segments;
• generate a second signal in the time domain based at least in part on obtaining the plurality of the output signal segments;
• and
• transmit the second signal to a second wireless device.

An apparatus for wireless communications, comprising:

• means for identifying, at a first wireless device, a first signal in a time domain, the first signal comprising a plurality of sequences spanning a bandwidth for a plurality of symbol periods;
• means for segmenting the first signal into a plurality of signal segments, wherein each signal segment corresponds to a respective symbol period of the plurality of symbol periods;
• means for applying a first transform operation to each signal segment of the plurality of signal segments to obtain a plurality of transformed signal segments;
• means for restricting frequency components of the plurality of transformed signal segments to the bandwidth;
• means for applying a second transform operation different from the first transform operation to each transformed signal segment to obtain a plurality of output signal segments;
• means for generating a second signal in the time domain based at least in part on obtaining the plurality of the output signal segments;
• and
• means for transmitting the second signal to a second wireless device.

A non-transitory computer-readable medium storing code for wireless communications, the code comprising instructions executable by a processor to:

• identify, at a first wireless device, a first signal in a time domain, the first signal comprising a plurality of sequences spanning a bandwidth for a plurality of symbol periods;
• segment the first signal into a plurality of signal segments, wherein each signal segment corresponds to a respective symbol period of the plurality of symbol periods;
• apply a first transform operation to each signal segment of the plurality of signal segments to obtain a plurality of transformed signal segments;
• restrict frequency components of the plurality of transformed signal segments to the bandwidth;
• apply a second transform operation different from the first transform operation to each transformed signal segment to obtain a plurality of output signal segments;
• generate a second signal in the time domain based at least in part on obtaining the plurality of the output signal segments;
• and
• transmit the second signal to a second wireless device.