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US 11,777,566 B2Granted
Orthogonal time frequency space precoding of sounding reference signals
AssigneeQUALCOMM Incorporated
InventorsRaviteja Patchava, Jun Ma, Morteza Soltani, Xiaoxia Zhang
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Abstract
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may precode a sounding reference signal (SRS) transmission using a delay-Doppler precoder. The UE may transmit, after precoding the SRS transmission using the delay-Doppler precoder, the SRS transmission in an SRS symbol in a slot. Numerous other aspects are described.
Claims23
A method of wireless communication performed by a user equipment (UE), comprising:
- precoding a sounding reference signal (SRS) transmission using a delay-Doppler precoder;
- and
- transmitting, after precoding the SRS transmission using the delay-Doppler precoder, the SRS transmission in an SRS symbol in a slot,
- wherein precoding the SRS transmission using the delay-Doppler precoder comprises precoding the SRS transmission in a first subset of delay resources for the SRS symbol, and
- wherein the first subset of delay resources are orthogonal to a second subset of the delay resources for the SRS symbol.
2 more elements
A method of wireless communication performed by a user equipment (UE), comprising:
- precoding a sounding reference signal (SRS) transmission using a delay-Doppler precoder;
- and
- transmitting, after precoding the SRS transmission using the delay-Doppler precoder, the SRS transmission in an SRS symbol in a slot,
- wherein precoding the SRS transmission using the delay-Doppler precoder comprises precoding the SRS transmission in a plurality of delay resources, for the SRS symbol, in which the SRS transmission is code division multiplexed with another SRS transmission.
1 more element
A method of wireless communication performed by a base station, comprising:
- receiving, from a user equipment (UE), a sounding reference signal (SRS) transmission in an SRS symbol in a slot;
- decoding the SRS transmission using a delay-Doppler decoder;
- receiving, from another UE, another SRS transmission in the SRS symbol in the slot and
- decoding the other SRS transmission using another delay-Doppler decoder,
- wherein decoding the SRS transmission using the delay-Doppler decoder comprises decoding the SRS transmission into a first subset of delay resources for the SRS symbol,
- wherein decoding the other SRS transmission using the other delay-Doppler decoder comprises decoding the other SRS transmission into a second subset of delay resources for the SRS symbol, and
- wherein the first subset of delay resources and the second subset of delay resources are orthogonal in a first Doppler column for the SRS symbol.
4 more elements
A method of wireless communication performed by a base station, comprising:
- receiving, from a user equipment (UE), a sounding reference signal (SRS) transmission in an SRS symbol in a slot
- decoding the SRS transmission using a delay-Doppler decoder;
- receiving, from another UE, another SRS transmission in the SRS symbol in the slot and
- decoding the other SRS transmission using another delay-Doppler decoder, wherein decoding the SRS transmission using the delay-Doppler decoder comprises:
- decoding the SRS transmission into a plurality of delay resources for the SRS symbol;
- and
- wherein decoding the other SRS transmission using the other delay-Doppler decoder comprises:
- decoding the other SRS transmission into the plurality of delay resources for the SRS symbol, wherein the SRS transmission is cyclic shifted relative to the other SRS transmission.
5 more elements
A method of wireless communication performed by a base station, comprising:
- receiving, from a user equipment (UE), a sounding reference signal (SRS) transmission in an SRS symbol in a slot
- decoding the SRS transmission using a delay-Doppler decoder;
- receiving, from the UE or from another UE, another SRS transmission in another SRS symbol in the slot, wherein the SRS symbol and the other SRS symbol are adjacent symbols in the slot;
- and
- decoding the other SRS transmission using another delay-Doppler decoder.
2 more elements
A method of wireless communication performed by a base station, comprising:
- receiving, from a user equipment (UE), a sounding reference signal (SRS) transmission in an SRS symbol in a slot and
- decoding the SRS transmission using a delay-Doppler decoder, wherein the delay-Doppler decoder comprises a symplectic finite Fourier transform (SFFT) decoder.
A user equipment (UE) for wireless communication, comprising:
- a memory;
- and
- one or more processors, coupled to the memory, configured to:
- precode a sounding reference signal (SRS) transmission using a delay-Doppler precoder;
- transmit, after precoding the SRS transmission using the delay-Doppler precoder, the SRS transmission in an SRS symbol in a slot;
- precode another SRS transmission using another delay-Doppler precoder;
- and
- transmit, after precoding the other SRS transmission using the other delay-Doppler precoder, the other SRS transmission in another SRS symbol in the slot,
- wherein the SRS symbol and the other SRS symbol are adjacent SRS symbols in the slot.
6 more elements
A user equipment (UE) for wireless communication, comprising:
- a memory;
- and
- one or more processors, coupled to the memory, configured to:
- precode a sounding reference signal (SRS) transmission using a delay-Doppler precoder;
- and
- transmit, after precoding the SRS transmission using the delay-Doppler precoder, the SRS transmission in an SRS symbol in a slot using a first antenna port;
- precode another SRS transmission using another delay-Doppler precoder;
- and
- transmit, after precoding the other SRS transmission using the other delay-Doppler precoder, the other SRS transmission in another SRS symbol in the slot using a second antenna port,
- wherein the SRS symbol and the other SRS symbol are adjacent SRS symbols in the slot.
7 more elements
A base station for wireless communication, comprising:
- a memory;
- and
- one or more processors, coupled to the memory, configured to:
- receive, from a user equipment (UE), a sounding reference signal (SRS) transmission in an SRS symbol in a slot;
- decode the SRS transmission using a delay-Doppler decoder;
- receive, from the UE, another SRS transmission in the SRS symbol in the slot;
- and
- decode the other SRS transmission using another delay-Doppler decoder, wherein the SRS transmission is associated with a first antenna port of the UE, and wherein the other SRS transmission is associated with a second antenna port of the UE.
5 more elements
A base station for wireless communication, comprising:
- a memory;
- and
- one or more processors, coupled to the memory, configured to:
- transmit, to the UE, an orthogonal time frequency space (OTFS) precoding configuration, wherein the OTFS precoding configuration comprises a semi-static configuration or a dynamic configuration
- receive, from a user equipment (UE), a sounding reference signal (SRS) transmission in an SRS symbol in a slot and
- decode the SRS transmission using a delay-Doppler decoder,
- wherein the OTFS precoding configuration indicates at least one of:
- a delay resource usage technique for precoding the SRS transmission, or
- a delay resource allocation for the SRS transmission, and
- wherein the delay resource allocation is based at least in part on at least one of:
- a channel delay spread, or
- a quantity of resource elements allocated for the SRS symbol.
9 more elements
Dependencies are inferred from the claim text.