Low peak-to-average power ratio waveform generation
Aspects presented herein provide a low PAPR waveform design based on resource spreading, pulse shaping, and/or dynamic MCS configuration, such that a transmitting wireless device may set IBO of its PA closer to the saturation point of the PA to enhance the PA efficiency. In one aspect, a first network node receives waveform information from a second network node, where the waveform information includes at least one of: one or more first parameters associated with a first waveform type or one or more second parameters associated with a second waveform type. The first network node processes data based on the one or more first parameters associated with the first waveform type or the one or more second parameters associated with the second waveform type. The first network node transmits a waveform based on the processed data, where the waveform is the first waveform type or the second waveform type.
1. A first network node for wireless communication, comprising:
memory; and
at least one processor coupled to the memory, wherein the at least one processor is configured to:
receive, from a second network node, waveform information for a waveform, wherein the waveform information includes at least one of: one or more first parameters associated with a first waveform type or one or more second parameters associated with a second waveform type, wherein the waveform information includes a spreading factor (SF) value, wherein the one or more first parameters or the one or more second parameters include the SF value associated with at least one of: a modulation and coding scheme (MCS) index value, a target code rate, or a spectral efficiency;
process data based on the one or more first parameters associated with the first waveform type or the one or more second parameters associated with the second waveform type; and
transmit the waveform based on the processed data, wherein the waveform is the first waveform type or the second waveform type and includes an SF based on the SF value indicated in the waveform information from the second network node.
2. The first network node of claim 1 , wherein the one or more first parameters or the one or more second parameters includes spreading information.
3. The first network node of claim 2 , wherein the spreading information is associated with at least one of: one or more filters to be applied to the data, a number of filters to be applied on the data, one or more filter taps to be applied to the data, one or more coefficient values for the one or more filter taps, or an amplitude.
4. The first network node of claim 1 , wherein, to process the data based on the one or more first parameters associated with the first waveform type or the one or more second parameters associated with the second waveform type, the at least one processor is configured to:
apply spreading to the data based on the SF value.
5. The first network node of claim 4 , wherein the spreading applied to the data corresponds to a set of resources, and wherein, to transmit the waveform based on the processed data, the at least one processor is configured to transmit the waveform on one or more subcarriers of the set of resources, wherein an amount of the one or more subcarriers is based on the SF value.
6. The first network node of claim 1 , wherein the MCS index value, the target code rate, or the spectral efficiency is based on the SF value.
7. The first network node of claim 1 , wherein, to transmit the waveform based on the processed data, the at least one processor is configured to transmit the waveform on physical channels in uplink, downlink, or sidelink.
8. The first network node of claim 1 , wherein the one or more first parameters or the one or more second parameters include pulse shaping information.
9. The first network node of claim 8 , wherein, to process the data based on the one or more first parameters associated with the first waveform type or the one or more second parameters associated with the second waveform type, the at least one processor is configured to:
apply pulse shaping to the data based on the pulse shaping information.
10. The first network node of claim 1 , wherein, to receive the waveform information from the second network node, the at least one processor is configured to receive the waveform in at least one of: downlink control information (DCI), radio resource control (RRC) signaling, or a medium access control (MAC) control element (CE) (MAC-CE).
11. The first network node of claim 1 , wherein the at least one processor is further configured to:
transmit capability information of the first network node to the second network node, wherein the waveform information is based on the capability information of the first network node.
12. The first network node of claim 1 , wherein the first network node corresponds to a user equipment (UE) or a component of the UE, and the second network node corresponds to a base station or one or more components of the base station.
13. The first network node of claim 1 , wherein the data includes data symbols, demodulation reference signal (DMRS) symbols, or a combination thereof.
14. The first network node of claim 1 , wherein the SF value is associated with at least the MCS index value.
15. The first network node of claim 14 , wherein the MCS index value is based on the SF value.
16. The first network node of claim 1 , wherein the SF value is further associated with at least a modulation order.
17. The first network node of claim 16 , wherein the modulation order is based on the SF value.
18. The first network node of claim 1 , wherein the SF value is associated with at least the target code rate.
19. The first network node of claim 18 , wherein the target code rate is based on the SF value.
20. The first network node of claim 1 , wherein the SF value is associated with at least the spectral efficiency.
21. The first network node of claim 20 , wherein the spectral efficiency is based on the SF value.
22. The first network node of claim 1 , wherein the at least one processor is further configured to:
receive a parameter setting that adjusts a switching point between different modulation orders of an MCS table, wherein the MCS index is interpreted based on the MCS table having the switching point indicated by the parameter setting.
23. The first network node of claim 1 , wherein the at least one processor is further configured to:
receive a configuration for multiple MCS tables, each table of the multiple MCS tables having a different switching point between different modulation orders; and
receive an indication to use an MCS table from the multiple MCS tables, wherein the MCS index is interpreted based on the MCS table that the first network node is indicated to use.
24. A method of wireless communication performed by a first network node, comprising:
receiving, from a second network node, waveform information for a waveform, wherein the waveform information includes at least one of: one or more first parameters associated with a first waveform type or one or more second parameters associated with a second waveform type, wherein the waveform information includes a spreading factor (SF) value, wherein the one or more first parameters or the one or more second parameters include the SF value associated with at least one of: a modulation and coding scheme (MCS) index value, a target code rate, or a spectral efficiency;
processing data based on the one or more first parameters associated with the first waveform type or the one or more second parameters associated with the second waveform type; and
transmitting the waveform based on the processed data, wherein the waveform is the first waveform type or the second waveform type and includes an SF based on the SF value indicated in the waveform information from the second network node.
25. A second network node for wireless communication, comprising:
memory; and
at least one processor coupled to the memory, wherein the at least one processor is configured to:
transmit, to at least one first network node, waveform information for a waveform, wherein the waveform information includes at least one of: one or more first parameters associated with a first waveform type or one or more second parameters associated with a second waveform type, wherein the waveform information includes a spreading factor (SF) value, wherein the one or more first parameters or the one or more second parameters include the SF value associated with at least one of: a modulation and coding scheme (MCS) index value, a target code rate, or a spectral efficiency; and
receive the waveform that includes data from the at least one first network node, wherein the data is processed based on the one or more first parameters associated with the first waveform type or the one or more second parameters associated with the second waveform type and includes an SF based on the SF value indicated in the waveform information from the second network node.
26. The second network node of claim 25 , wherein the one or more first parameters or the one or more second parameters includes spreading information.
27. The second network node of claim 26 , wherein the spreading information is associated with at least one of: one or more filters to be applied to the data, one or more filter taps to be applied to the data, one or more coefficient values for the one or more filter taps, or an amplitude.
28. The second network node of claim 25 , wherein the MCS index value, the target code rate, or the spectral efficiency is based on the SF value.
29. The second network node of claim 25 , wherein the data is received via physical channels in uplink, downlink, or sidelink.
30. The second network node of claim 25 , wherein the one or more first parameters or the one or more second parameters include pulse shaping information.
31. The second network node of claim 25 , wherein the waveform information is transmitted via at least one of: downlink control information (DCI), radio resource control (RRC) signaling, or a medium access control (MAC) control element (CE) (MAC-CE).
32. The second network node of claim 25 , wherein the at least one processor is further configured to:
receive capability information from the at least one first network node, wherein the waveform information is based on the capability information of the at least one first network node.
33. The second network node of claim 25 , wherein each first network node of the at least one first network node corresponds to a user equipment (UE) or a component of the UE, and the second network node corresponds to a base station or one or more components of the base station.
34. The second network node of claim 25 , wherein
the waveform is the first waveform type or the second waveform type.
35. The second network node of claim 25 , wherein the at least one first network node includes at least a first user equipment (UE) and a second UE, and wherein to receive the data from the at least one first network node, the at least one processor is configured to:
receive a first transmission from the first UE, the first transmission being processed in accordance with the waveform information, wherein the first transmission is received on a first plurality of subcarriers; and
receive a second transmission from the second UE, the second transmission being processed in accordance with the waveform information, wherein the second transmission is received on a second plurality of subcarriers, wherein the first plurality of subcarriers partially overlaps with the second plurality of subcarriers.
36. The second network node of claim 25 , wherein the at least one processor is further configured to:
transmit a parameter setting that adjusts a switching point between different modulation orders of an MCS table, wherein the MCS index is based on the MCS table having the switching point indicated by the parameter setting.
37. The second network node of claim 25 , wherein the at least one processor is further configured to:
configure multiple MCS tables, each MSC table of the multiple MCS tables having a different switching point between different modulation orders; and
transmit an indication to use an MCS table from the multiple MCS tables, wherein the MCS index is based on the MCS table indicated by the indication.
38. A method of wireless communication performed by a second network node, comprising:
transmitting, to at least one first network node, waveform information for a waveform, wherein the waveform information includes at least one of: one or more first parameters associated with a first waveform type or one or more second parameters associated with a second waveform type, wherein the waveform information includes a spreading factor (SF) value, wherein the one or more first parameters or the one or more second parameters include the SF value associated with at least one of: a modulation and coding scheme (MCS) index value, a target code rate, or a spectral efficiency; and
receiving the waveform that includes data from the at least one first network node, wherein the data is processed based on the one or more first parameters associated with the first waveform type or the one or more second parameters associated with the second waveform type and includes an SF based on the SF value indicated in the waveform information from the second network node.