Sounding reference signal (SRS) frequency hopping for distributed antenna port mapping
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive configuration information indicating a sounding reference signal (SRS) resource set that includes an SRS resource, the SRS resource associated with multiple antenna ports having a distributed mapping to multiple orthogonal frequency division multiplexing (OFDM) symbols of the SRS resource. The UE may transmit a plurality of SRSs on the multiple antenna ports in the multiple OFDM symbols of the SRS resource using a frequency hopping pattern that is a function of a count of a quantity of SRS transmissions, and the count of the quantity of SRS transmissions is scaled by a quantity of the multiple OFDM symbols. Numerous other aspects are described.
1 . An apparatus for wireless communication at a user equipment (UE), comprising:
a memory; and
one or more processors, coupled to the memory, configured to:
receive configuration information indicating a sounding reference signal (SRS) resource set that includes an SRS resource, the SRS resource associated with multiple antenna ports and the multiple antenna ports having a distributed mapping to multiple orthogonal frequency division multiplexing (OFDM) symbols of the SRS resource; and
transmit a plurality of SRSs on the multiple antenna ports in the multiple OFDM symbols of the SRS resource using a frequency hopping pattern that is a function of a count of a quantity of SRS transmissions, wherein the count of the quantity of SRS transmissions is based at least in part on the multiple OFDM symbols being counted as a single OFDM symbol, and the count of the quantity of SRS transmissions is scaled by a quantity of the multiple OFDM symbols.
2 . The apparatus of claim 1 , wherein the plurality of SRSs in the multiple OFDM symbols are counted as a single SRS transmission.
3 . The apparatus of claim 1 , wherein a repetition factor for the SRS resource is applicable to the multiple OFDM symbols as a single unit.
4 . The apparatus of claim 1 , wherein the one or more processors, to transmit the plurality of SRSs, are configured to:
transmit, in a single frequency hop of the frequency hopping pattern, the plurality of SRSs and one or more repetitions of the plurality of SRSs in the SRS resource.
5 . The apparatus of claim 4 , wherein the plurality of SRSs and the one or more repetitions of the plurality of SRSs are counted as a single SRS transmission.
6 . The apparatus of claim 1 , wherein the one or more processors, to transmit the plurality of SRSs, are configured to:
transmit, in a first frequency hop of the frequency hopping pattern, the plurality of SRSs on the multiple antenna ports in first multiple OFDM symbols of the SRS resource, and
wherein the one or more processors are further configured to:
transmit, in a second frequency hop of the frequency hopping pattern, additional SRSs on the multiple antenna ports in second OFDM symbols of the SRS resource.
7 . The apparatus of claim 1 , wherein the one or more processors, to transmit the plurality of SRSs, are configured to:
transmit, in a first frequency hop of the frequency hopping pattern, the plurality of SRSs on the multiple antenna ports in first multiple OFDM symbols of a first occasion of the SRS resource, and
wherein the one or more processors are further configured to:
transmit, in a second frequency hop of the frequency hopping pattern, the plurality of SRSs on the multiple antenna ports in second multiple OFDM symbols of a second occasion of the SRS resource.
8 . An apparatus for wireless communication at a network node, comprising:
a memory; and
one or more processors, coupled to the memory, configured to:
transmit configuration information indicating a sounding reference signal (SRS) resource set that includes an SRS resource, the SRS resource associated with multiple antenna ports and the multiple antenna ports having a distributed mapping to multiple orthogonal frequency division multiplexing (OFDM) symbols of the SRS resource; and
receive a plurality of SRSs on the multiple antenna ports in the multiple OFDM symbols of the SRS resource using a frequency hopping pattern that is a function of a count of a quantity of SRS transmissions, wherein the count of the quantity of SRS transmissions is based at least in part on the multiple OFDM symbols being counted as a single OFDM symbol, and the count of the quantity of SRS transmissions is scaled by a quantity of the multiple OFDM symbols.
9 . The apparatus of claim 8 , wherein the plurality of SRSs in the multiple OFDM symbols are counted as a single SRS transmission.
10 . The apparatus of claim 8 , wherein a repetition factor for the SRS resource is applicable to the multiple OFDM symbols as a single unit.
11 . The apparatus of claim 8 , wherein the one or more processors, to receive the plurality of SRSs, are configured to:
receive, in a single frequency hop of the frequency hopping pattern, the plurality of SRSs and one or more repetitions of the plurality of SRSs in the SRS resource.
12 . The apparatus of claim 11 , wherein the plurality of SRSs and the one or more repetitions of the plurality of SRSs are counted as a single SRS transmission.
13 . The apparatus of claim 8 , wherein the one or more processors, to receive the plurality of SRSs, are configured to:
receive, in a first frequency hop of the frequency hopping pattern, the plurality of SRSs on the multiple antenna ports in first multiple OFDM symbols of the SRS resource, and
wherein the one or more processors are further configured to:
receive, in a second frequency hop of the frequency hopping pattern, the plurality of SRSs on the multiple antenna ports in second multiple OFDM symbols of the SRS resource.
14 . The apparatus of claim 8 , wherein the one or more processors, to receive the plurality of SRSs, are configured to:
receive, in a first frequency hop of the frequency hopping pattern, the plurality of SRSs on the multiple antenna ports in first multiple OFDM symbols of a first occasion of the SRS resource, and
wherein the one or more processors are further configured to:
receive, in a second frequency hop of the frequency hopping pattern, the plurality of SRSs on the multiple antenna ports in second multiple OFDM symbols of a second occasion of the SRS resource.
15 . A method of wireless communication performed by a user equipment (UE), comprising:
receiving configuration information indicating a sounding reference signal (SRS) resource set that includes an SRS resource, the SRS resource associated with multiple antenna ports and the multiple antenna ports having a distributed mapping to multiple orthogonal frequency division multiplexing (OFDM) symbols of the SRS resource; and
transmitting a plurality of SRSs on the multiple antenna ports in the multiple OFDM symbols of the SRS resource using a frequency hopping pattern that is a function of a count of a quantity of SRS transmissions, wherein the count of the quantity of SRS transmissions is based at least in part on the multiple OFDM symbols being counted as a single OFDM symbol, and the count of the quantity of SRS transmissions is scaled by a quantity of the multiple OFDM symbols.
16 . The method of claim 15 , wherein the plurality of SRSs in the multiple OFDM symbols are counted as a single SRS transmission.
17 . The method of claim 15 , wherein a repetition factor for the SRS resource is applicable to the multiple OFDM symbols as a single unit.
18 . The method of claim 15 , wherein transmitting the plurality of SRSs comprises:
transmitting, in a single frequency hop of the frequency hopping pattern, the plurality of SRSs and one or more repetitions of the plurality of SRSs in the SRS resource.
19 . The method of claim 18 , wherein the plurality of SRSs and the one or more repetitions of the plurality of SRSs are counted as a single SRS transmission.
20 . The method of claim 15 , wherein transmitting the plurality of SRSs comprises:
transmitting, in a first frequency hop of the frequency hopping pattern, the plurality of SRSs on the multiple antenna ports in first multiple OFDM symbols of the SRS resource, and
wherein the method further comprises:
transmitting, in a second frequency hop of the frequency hopping pattern, additional SRSs on the multiple antenna ports in second OFDM symbols of the SRS resource.
21 . The method of claim 15 , wherein transmitting the plurality of SRSs comprises:
transmitting, in a first frequency hop of the frequency hopping pattern, the plurality of SRSs on the multiple antenna ports in first multiple OFDM symbols of a first occasion of the SRS resource, and
wherein the method further comprises:
transmitting, in a second frequency hop of the frequency hopping pattern, the plurality of SRSs on the multiple antenna ports in second multiple OFDM symbols of a second occasion of the SRS resource.
22 . A method of wireless communication performed by a network node, comprising:
transmitting configuration information indicating a sounding reference signal (SRS) resource set that includes an SRS resource, the SRS resource associated with multiple antenna ports and the multiple antenna ports having a distributed mapping to multiple orthogonal frequency division multiplexing (OFDM) symbols of the SRS resource; and
receiving a plurality of SRSs on the multiple antenna ports in the multiple OFDM symbols of the SRS resource using a frequency hopping pattern that is a function of a count of a quantity of SRS transmissions, wherein the count of the quantity of SRS transmissions is based at least in part on the multiple OFDM symbols being counted as a single OFDM symbol, and the count of the quantity of SRS transmissions is scaled by a quantity of the multiple OFDM symbols.
23 . The method of claim 22 , wherein the plurality of SRSs in the multiple OFDM symbols are counted as a single SRS transmission.
24 . The method of claim 22 , wherein a repetition factor for the SRS resource is applicable to the multiple OFDM symbols as a single unit.
25 . The method of claim 22 , wherein receiving the plurality of SRSs comprises:
receiving, in a single frequency hop of the frequency hopping pattern, the plurality of SRSs and one or more repetitions of the plurality of SRSs in the SRS resource.
26 . The method of claim 25 , wherein the plurality of SRSs and the one or more repetitions of the plurality of SRSs are counted as a single SRS transmission.
27 . The method of claim 22 , wherein receiving the plurality of SRSs comprises receiving, in a first frequency hop of the frequency hopping pattern, the plurality of SRSs on the multiple antenna ports in first multiple OFDM symbols of the SRS resource.
28 . The method of claim 27 , further comprising receiving, in a second frequency hop of the frequency hopping pattern, the plurality of SRSs on the multiple antenna ports in second multiple OFDM symbols of the SRS resource.
29 . The method of claim 22 , wherein receiving the plurality of SRSs comprises receiving, in a first frequency hop of the frequency hopping pattern, the plurality of SRSs on the multiple antenna ports in first multiple OFDM symbols of a first occasion of the SRS resource.
30 . The method of claim 29 , further comprising receiving, in a second frequency hop of the frequency hopping pattern, the plurality of SRSs on the multiple antenna ports in second multiple OFDM symbols of a second occasion of the SRS resource.