Wireless communication with non-punctured symbols
A transmitting device maps complex valued symbols in sequence to physical resource blocks for a sidelink transmission. The transmitting device reserves a first symbol of a subframe, where resource elements in the first symbol of the subframe are not considered in mapping the complex valued symbols to the physical resource blocks for the sidelink transmission. The transmitting device transmits the sidelink transmission after mapping the complex valued symbols to the physical resource blocks. A receiving device receives the sidelink transmission and decodes the sidelink transmission to determine complex valued symbols that are mapped in sequence to physical resource blocks of the sidelink transmission, where the complex valued symbols are not mapped to resource elements in a first symbol of a subframe.
1. A method of wireless communication at a transmitting device, comprising:
mapping complex valued symbols in sequence in an order of generation to physical resource blocks for a sidelink transmission;
reserving an entire first symbol of a subframe, wherein resource elements in the entire first symbol of the subframe are not considered in mapping the complex valued symbols to the physical resource blocks for the sidelink transmission;
transmitting a pilot signal or a demodulation reference signal (DM-RS) that spans the entire first symbol of the subframe, a placement of the pilot signal or the DM-RS to span the entire first symbol enabling reception of the DM-RS when automatic gain control converges prior to an end of the first symbol; and
transmitting the sidelink transmission after mapping the complex valued symbols to the physical resource blocks.
2. The method of claim 1 , further comprising:
reserving a last symbol of the subframe, wherein resource elements in the last symbol of the subframe are not considered in mapping the complex valued symbols to the physical resource blocks for the sidelink transmission.
3. The method of claim 2 , wherein mapping the complex valued symbols to the physical resource blocks for the sidelink transmission includes rate matching around the entire first symbol of the subframe and the last symbol of the subframe.
4. The method of claim 1 , wherein the subframe comprises a single carrier frequency division multiple access (SC-FDMA) subframe and the sidelink transmission comprises at least one of a physical sidelink shared channel (PSSCH) or a physical sidelink control channel (PSCCH).
5. The method of claim 1 , wherein the pilot signal or the DM-RS comprises a quasi-constant envelope in a time domain.
6. An apparatus for wireless communication at a transmitting device, comprising:
a memory; and
at least one processor coupled to the memory and configured to:
map complex valued symbols in sequence to physical resource blocks for a sidelink transmission;
reserve an entire first symbol of a subframe, wherein resource elements in the entire first symbol of the subframe are not considered in mapping the complex valued symbols to the physical resource blocks for the sidelink transmission;
transmit a pilot signal or a demodulation reference signal (DM-RS) that spans the entire first symbol of the subframe, a placement of the pilot signal or the DM-RS to span the entire first symbol enabling reception of the DM-RS when automatic gain control converges prior to an end of the first symbol; and
transmit the sidelink transmission after mapping the complex valued symbols to the physical resource blocks.
7. The apparatus of claim 6 , wherein the at least one processor is further configured to:
reserve a last symbol of the subframe, wherein resource elements in the last symbol of the subframe are not considered in mapping the complex valued symbols to the physical resource blocks for the sidelink transmission.
8. The apparatus of claim 7 , wherein mapping the complex valued symbols to the physical resource blocks for the sidelink transmission includes rate matching around the entire first symbol of the subframe and the last symbol of the subframe.
9. The apparatus of claim 6 , wherein the subframe comprises a single carrier frequency division multiple access (SC-FDMA) subframe and the sidelink transmission comprises at least one of a physical sidelink shared channel (PSSCH) or a physical sidelink control channel (PSCCH).
10. The apparatus of claim 6 , wherein the pilot signal or the DM-RS comprises a quasi-constant envelope in a time domain.