Configuration and indication of resources for partial frequency sounding

1 . A method for wireless communications at a user equipment (UE), comprising:

receiving an indication of a configuration identifying a set of time and frequency resources for transmission of sounding reference signals, the set of time and frequency resources comprising a plurality of subsets of time and frequency resources, wherein each subset of time and frequency resources of the plurality of subsets of time and frequency resources is associated with a corresponding value of a plurality of values of a partial frequency parameter, wherein each value of the partial frequency parameter indicates a proportion of the set of time and frequency resources to be used for partial frequency sounding;

receiving control signaling indicating a value of the partial frequency parameter of the plurality of values; and

transmitting a sounding reference signal on a subset of time and frequency resources of the plurality of subsets of time and frequency resources that corresponds to the value of the partial frequency parameter indicated by the received control signaling, wherein a length of the sounding reference signal is scaled based on the value of the partial frequency parameter indicated by the control signaling.

2 . The method of claim 1 , wherein:

receiving control signaling indicating the value of the partial frequency parameter comprises receiving a value of the partial frequency parameter of the plurality of values of the partial frequency parameter for each time resource of the subset of time and frequency resources on which the sounding reference signal is transmitted; and

transmitting the sounding reference signal is based at least in part on the received value of the partial frequency parameter for each time resource.

3 . The method of claim 1 , further comprising:

receiving an indication of the length of the sounding reference signal.

4 . The method of claim 1 , further comprising:

receiving an indication of a frequency offset associated with the subset of time and frequency resources that corresponds to the value of the partial frequency parameter indicated by the received control signaling;

wherein transmitting the sounding reference signal is based at least in part on the indicated frequency offset.

5 . The method of claim 4 , wherein receiving an indication of the frequency offset further comprises:

receiving an indication of a frequency offset for each symbol of the transmitted sounding reference signal.

6 . The method of claim 4 , wherein receiving an indication of the frequency offset further comprises:

receiving an indication of a frequency offset for each time resource slot at least partially occupied by the transmitted sounding reference signal.

7 . The method of claim 4 , further comprising:

receiving control signaling indicating a frequency offset pattern for each value of the partial frequency parameter;

wherein receiving the indication of the frequency offset further comprises receiving an indication of a frequency offset pattern, the frequency offset pattern based at least in part on the indicated value of the partial frequency parameter, a number of symbols of the sounding resource signal, and the control signaling indicating a frequency offset pattern for each value of the partial frequency parameter.

8 . The method of claim 4 , further comprising:

receiving control signaling indicating a plurality of frequency offset patterns for each value of the partial frequency parameter;

wherein receiving the indication of the frequency offset further comprises receiving an indication of a frequency offset pattern, the frequency offset pattern based at least in part on the indicated value of the partial frequency parameter and receiving control signaling indicating a frequency offset pattern of the plurality of frequency offset patterns corresponding to the indicated value of the partial frequency parameter.

9 . The method of claim 4 , wherein receiving the indication of the frequency offset further comprises:

receiving an indication of a single frequency offset for the subset of time and frequency resources on which the sounding reference signal is transmitted.

10 . The method of claim 9 , wherein receiving the indication of the single frequency offset further comprises:

receiving an indication of a frequency resource configuration value indicating a frequency domain shift in the subset of time and frequency resources on which the sounding reference signal is transmitted.

11 . The method of claim 4 , wherein receiving the indication of the frequency offset further comprises:

receiving an indication of a frequency offset for each time resource of the subset of time and frequency resources on which the sounding reference signal is transmitted.

12 . The method of claim 11 , wherein receiving the indication of the frequency offset for each time resource further comprises:

receiving an indication of a frequency resource configuration value for each time resource indicating a frequency domain shift in the subset of time and frequency resources on which the sounding reference signal is transmitted.

13 . The method of claim 4 , further comprising:

receiving an indication of a frequency offset pattern, the frequency offset pattern being based at least in part on the indicated value of the partial frequency parameter, a number of physical resource blocks, a sounding reference signal counter, a symbol index, a slot index, a number of sounding reference signal symbols, or a combination thereof.

14 . The method of claim 1 , further comprising:

receiving control signaling indicating a frequency resource configuration value indicating a frequency domain shift in the subset of time and frequency resources on which the sounding reference signal is transmitted or a frequency domain position reference point in the subset of time and frequency resources on which the sounding reference signal is transmitted.

15 . A method for wireless communications at a base station, comprising:

transmitting, to a user equipment (UE), an indication of a configuration identifying a set of time and frequency resources for the UE to use to transmit sounding reference signals, the set of time and frequency resources comprising a plurality of subsets of time and frequency resources, wherein each subset of time and frequency resources of the plurality of subsets of time and frequency resources is associated with a corresponding value of a plurality of values of a partial frequency parameter, wherein each value of the partial frequency parameter indicates a proportion of the set of time and frequency resources to be used for partial frequency sounding;

transmitting control signaling indicating a value of the partial frequency parameter of the plurality of values; and

receiving a sounding reference signal on a subset of time and frequency resources of the plurality of subsets of time and frequency resources that corresponds to the value of the partial frequency parameter indicated by the received control signaling, wherein a length of the sounding reference signal is scaled based on the value of the partial frequency parameter indicated by the control signaling.

16 . The method of claim 15 , wherein:

transmitting control signaling indicating the value of the partial frequency parameter comprises transmitting a value of the partial frequency parameter of the plurality of values of the partial frequency parameter for each time resource of the subset of time and frequency resources on which the sounding reference signal is transmitted; and

receiving the sounding reference signal is based at least in part on the transmitted value of the partial frequency parameter for each time resource.

17 . The method of claim 15 , further comprising:

transmitting an indication of the length of the sounding reference signal.

18 . The method of claim 15 , further comprising:

transmitting an indication of a frequency offset associated with the subset of time and frequency resources that corresponds to the value of the partial frequency parameter indicated by the transmitted control signaling;

wherein receiving the sounding reference signal is based at least in part on the indicated frequency offset.

19 . The method of claim 18 , wherein transmitting an indication of the frequency offset further comprises:

transmitting an indication of a frequency offset for each symbol of the received sounding reference signal.

20 . The method of claim 18 , wherein transmitting an indication of the frequency offset further comprises:

transmitting an indication of a frequency offset for each time resource slot at least partially occupied by the received sounding reference signal.

21 . The method of claim 18 , further comprising:

transmitting control signaling indicating a frequency offset pattern for each value of the partial frequency parameter;

wherein transmitting the indication of the frequency offset further comprises transmitting an indication of a frequency offset pattern, the frequency offset pattern based at least in part on the indicated value of the partial frequency parameter, a number of symbols of the sounding resource signal, and the control signaling indicating a frequency offset pattern for each value of the partial frequency parameter.

22 . The method of claim 18 , further comprising:

transmitting control signaling indicating a plurality of frequency offset patterns for each value of the partial frequency parameter;

wherein transmitting the indication of the frequency offset further comprises transmitting an indication of a frequency offset pattern, the frequency offset pattern based at least in part on the indicated value of the partial frequency parameter and transmitting control signaling indicating a frequency offset pattern of the plurality of frequency offset patterns corresponding to the indicated value of the partial frequency parameter.

23 . The method of claim 18 , wherein transmitting the indication of the frequency offset further comprises:

transmitting an indication of a single frequency offset for the subset of time and frequency resources on which the sounding reference signal is received.

24 . The method of claim 18 , wherein transmitting the indication of the frequency offset further comprises:

transmitting an indication of a frequency offset for each time resource of the subset of time and frequency resources on which the sounding reference signal is transmitted.

25 . The method of claim 18 , further comprising:

transmitting an indication of a frequency offset pattern, the frequency offset pattern being based at least in part on the indicated value of the partial frequency parameter, a number of physical resource blocks, a sounding reference signal counter, a symbol index, a slot index, a number of sounding reference signal symbols, or a combination thereof.

26 . The method of claim 15 , further comprising:

transmitting control signaling indicating, in the subset of time and frequency resources on which the sounding reference signal is received, a frequency resource configuration value indicating a frequency domain or a frequency domain position reference point.

27 . An apparatus for wireless communications at a user equipment (UE), 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 an indication of a configuration identifying a set of time and frequency resources for transmission of sounding reference signals, the set of time and frequency resources comprising a plurality of subsets of time and frequency resources, wherein each subset of time and frequency resources of the plurality of subsets of time and frequency resources is associated with a corresponding value of a plurality of values of a partial frequency parameter, wherein each value of the partial frequency parameter indicates a proportion of the set of time and frequency resources to be used for partial frequency sounding;

receive control signaling indicating a value of the partial frequency parameter of the plurality of values; and

transmit a sounding reference signal on a subset of time and frequency resources of the plurality of subsets of time and frequency resources that corresponds to the value of the partial frequency parameter indicated by the received control signaling, wherein a length of the sounding reference signal is scaled based on the value of the partial frequency parameter indicated by the control signaling.

28 . The apparatus of claim 27 , wherein the instructions are further executable by the processor to cause the apparatus to:

receive control signaling indicating the value of the partial frequency parameter comprises receiving a value of the partial frequency parameter of the plurality of values of the partial frequency parameter for each time resource of the subset of time and frequency resources on which the sounding reference signal is transmitted; and

transmit the sounding reference signal is based at least in part on the received value of the partial frequency parameter for each time resource.

29 . The apparatus of claim 27 , wherein the instructions are further executable by the processor to cause the apparatus to:

receive an indication of the length of the sounding reference signal.

30 . An apparatus for wireless communications at a base station, comprising:

a processor;

memory coupled with the processor; and

instructions stored in the memory and executable by the processor to cause the apparatus to:

transmit, to a user equipment (UE), an indication of a configuration identifying a set of time and frequency resources for the UE to use to transmit sounding reference signals, the set of time and frequency resources comprising a plurality of subsets of time and frequency resources, wherein each subset of time and frequency resources of the plurality of subsets of time and frequency resources is associated with a corresponding value of a plurality of values of a partial frequency parameter, wherein each value of the partial frequency parameter indicates a proportion of the set of time and frequency resources to be used for partial frequency sounding;

transmit control signaling indicating a value of the partial frequency parameter of the plurality of values; and

receive a sounding reference signal on a subset of time and frequency resources of the plurality of subsets of time and frequency resources that corresponds to the value of the partial frequency parameter indicated by the received control signaling, wherein a length of the sounding reference signal is scaled based on the value of the partial frequency parameter indicated by the control signaling.