Time-domain dmrs pattern for single-carrier communication waveform

A method for wireless communication at a wireless device, comprising:

• receiving, over a wireless channel via a single-carrier waveform, a burst comprising a plurality of symbols, wherein each symbol of the plurality of symbols comprises a first portion comprising data and a second portion comprising a demodulation reference signal (DMRS) sequence, wherein the second portion of each symbol is positioned at the end of the respective symbol;
• identifying, at a beginning of each symbol in the plurality of symbols, a cyclic prefix comprising a repetition of the DMRS sequence in the second portion of the respective symbol;
• and
• performing a channel estimation of the wireless channel based at least in part on the DMRS sequence.

An apparatus for wireless communication at a wireless device, comprising:

• a processor,
• memory coupled with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• generate a plurality of symbols, wherein each symbol of the plurality of symbols comprises a first portion comprising data and a second portion comprising a demodulation reference signal (DMRS) sequence, wherein the second portion of each symbol is positioned at the end of the respective symbol;
• add, to a beginning of each symbol in the plurality of symbols, a cyclic prefix comprising a repetition of the DMRS sequence in the second portion of the respective symbol;
• and
• transmit the plurality of symbols, including the cyclic prefix at the beginning of each respective symbol, in a burst over a wireless channel using a single-carrier waveform.

An apparatus for wireless communication at a wireless device, comprising:

• a processor,
• memory coupled with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• receive, over a wireless channel via a single-carrier waveform, a burst comprising a plurality of symbols, wherein each symbol of the plurality of symbols comprises a first portion comprising data and a second portion comprising a demodulation reference signal (DMRS) sequence, wherein the second portion of each symbol is positioned at the end of the respective symbol;
• identify, at a beginning of each symbol in the plurality of symbols, a cyclic prefix comprising a repetition of the DMRS sequence in the second portion of the respective symbol;
• and
• perform a channel estimation of the wireless channel based at least in part on the DMRS sequence.