Distortion probing reference signal configuration
Methods, systems, and devices for wireless communications are described. A configuration for a reference signal used to determine a non-linear behavior of transmission components at a transmitting device may be determined. The configuration for the reference signal may be determined based on signaling transmitted by the transmitting device, signaling transmitted by a device that receives the reference signal, or both. Additionally, or alternatively, the configuration for the reference signal may be determined based on a configuration of other signals transmitted by the transmitting device prior to or concurrently with the transmission of the reference signal. The determined configuration may be used to generate and transmit the reference signal or to determine a configuration of a received reference signal. In both cases, a non-linear response of transmission components at the transmitting device may be determined based on the reference signal.
1. An apparatus for wireless communication at a receiving 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:
determine a configuration for a distortion probing reference signal;
receive, based at least in part on the configuration, the distortion probing reference signal from a transmitting device, the distortion probing reference signal comprising a peak-to-average power ratio associated with a non-linear operating region of a transmitting component; and
determine a non-linear response of a transmission component of the transmitting device based at least in part on the distortion probing reference signal.
2. The apparatus of claim 1 , wherein the instructions are further executable by the processor to cause the apparatus to:
transmit an indication of a waveform type for the distortion probing reference signal, wherein the configuration for the distortion probing reference signal is based at least in part on the waveform type.
3. The apparatus of claim 1 , wherein the instructions are further executable by the processor to cause the apparatus to:
receive an indication of a waveform type for the distortion probing reference signal, wherein the configuration for the distortion probing reference signal is based at least in part on the waveform type.
4. The apparatus of claim 1 , wherein the instructions are further executable by the processor to cause the apparatus to:
determine a first waveform type for signals transmitted using a data channel, a second waveform type for signals transmitted using a control channel, or both, wherein the configuration for the distortion probing reference signal is based at least in part on the first waveform type or the second waveform type.
5. The apparatus of claim 1 , wherein the instructions are further executable by the processor to cause the apparatus to:
determine a first numerology for signals transmitted using a data channel in a bandwidth part, a second numerology for signals transmitted using a control channel in the bandwidth part, a third numerology for reference signals transmitted in the bandwidth part, or any combination thereof,
wherein the configuration for the distortion probing reference signal is based at least in part on the first numerology, the second numerology, or the third numerology.
6. The apparatus of claim 1 , wherein the instructions are further executable by the processor to cause the apparatus to:
activate a first bandwidth part and a second bandwidth part for communications; and
determine a first numerology for signals transmitted using a data channel in the first bandwidth part, a second numerology for signals transmitted using a control channel in the first bandwidth part, a third numerology for reference signals transmitted in the first bandwidth part, or any combination thereof, wherein:
the configuration for the distortion probing reference signal is based at least in part on the first numerology, the second numerology, or the third numerology, and
the distortion probing reference signal is received in the first bandwidth part.
7. The apparatus of claim 1 , wherein the instructions are further executable by the processor to cause the apparatus to:
activate a first bandwidth part and a second bandwidth part for communications;
determine a first numerology for signals transmitted using a data channel in the first bandwidth part, a second numerology for signals transmitted using a control channel in the first bandwidth part, a third numerology for reference signals transmitted in the first bandwidth part, or any combination thereof; and
determine a fourth numerology for signals transmitted using the data channel in the second bandwidth part, a fifth numerology for signals transmitted using the control channel in the second bandwidth part, a sixth numerology for reference signals transmitted in the second bandwidth part, or any combination thereof,
wherein the configuration for the distortion probing reference signal is based at least in part on the first numerology, the second numerology, the third numerology, the fourth numerology, the fifth numerology, or the sixth numerology.
8. The apparatus of claim 1 , wherein the instructions are further executable by the processor to cause the apparatus to:
identify a synchronization signal block index corresponding to a transmission spatial domain filter;
wherein the distortion probing reference signal is received based at least in part on a quasi-colocation between signals transmitted during the synchronization signal block index and the distortion probing reference signal.
9. The apparatus of claim 1 , wherein the instructions are further executable by the processor to cause the apparatus to:
determine a first correspondence between a control channel and a first reference signal, a second correspondence between a data channel and a second reference signal, or both based at least in part on a transmission configuration indicator.
10. The apparatus of claim 1 , wherein the instructions are further executable by the processor to cause the apparatus to:
determine a first set of spatial filtering coefficients for signals transmitted using a data channel, a second set of spatial filtering coefficients for signals transmitted using a control channel, a third set of spatial filtering coefficients for signal transmitted using a random access channel, or any combination thereof,
wherein the configuration for the distortion probing reference signal is based at least in part on the first set of spatial filtering coefficients, the second set of spatial filtering coefficients, or the third set of spatial filtering coefficients.
11. The apparatus of claim 1 , wherein the instructions are further executable by the processor to cause the apparatus to:
indicate a set of one or more spatial filtering coefficients for the distortion probing reference signal, wherein the configuration for the distortion probing reference signal is based at least in part on the set of one or more spatial filtering coefficients.
12. A method for wireless communication at a receiving device, comprising:
determining a configuration for a distortion probing reference signal;
receiving, based at least in part on the configuration, the distortion probing reference signal from a transmitting device, the distortion probing reference signal comprising a peak-to-average power ratio associated with a non-linear operating region of a transmitting component; and
determining a non-linear response of a transmission component of the transmitting device based at least in part on the distortion probing reference signal.