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US-20260128766-A1 - FEEDBACK TRANSMISSIONS FOR SPATIALLY COUPLED MULTIPLE-INPUT MULTIPLE-OUTPUT COMMUNICATIONS

US20260128766A1US 20260128766 A1US20260128766 A1US 20260128766A1US-20260128766-A1

Abstract

Aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for multiple-input multiple-output (MIMO) communications. One example method generally includes: receiving a signal using a MIMO receiver, wherein the signal includes a plurality of code blocks (CBs), each of the plurality of CBs including a first part received via a first layer of the MIMO receiver and a second part received via a second layer of the MIMO receiver, wherein the second part of each of the plurality of CBs is shifted within a spectrum by at least one resource position with respect to the first part of each of the plurality of CBs; transmitting an indication of one or more CBs of the plurality of CBs that have failed decoding at the UE; and receiving a retransmission signal including at least the one or more CBs that have failed the decoding at the UE.

Inventors

  • Kirill IVANOV
  • Wei Yang
  • Jing Jiang
  • Jing Sun
  • Hari Sankar

Assignees

  • QUALCOMM INCORPORATED

Dates

Publication Date
20260507
Application Date
20241104

Claims (20)

  1. 1 . An apparatus for wireless communication at a user equipment (UE), comprising: at least one memory comprising computer-executable instructions; and one or more processors configured to execute the computer-executable instructions and cause the apparatus to: receive a signal using a multiple-input multiple-output (MIMO) receiver, wherein the signal includes a plurality of code blocks (CBs), each of the plurality of CBs including a first part received via a first layer of the MIMO receiver and a second part received via a second layer of the MIMO receiver, wherein the second part of each of the plurality of CBs is shifted within a spectrum by at least one resource position with respect to the first part of each of the plurality of CBs; transmit an indication of one or more CBs of the plurality of CBs that have failed decoding at the UE; and receive a retransmission signal including at least the one or more CBs that have failed the decoding at the UE.
  2. 2 . The apparatus of claim 1 , wherein the one or more processors are further configured to cause the apparatus to: decode the one or more CBs included in the retransmission signal; perform interference cancellation for one or more other CBs of the plurality of CBs based on the decoding of the one or more CBs included in the retransmission signal; and decode the one or more other CBs after performing the interference cancellation.
  3. 3 . The apparatus of claim 1 , wherein the retransmission signal includes only the one or more CBs that have failed the decoding.
  4. 4 . The apparatus of claim 1 , wherein the retransmission signal includes the one or more CBs that have failed the decoding and one or more other CBs of the plurality of CBs to be decoded using interference cancellation at the UE after the one or more CBs in the retransmission signal are decoded.
  5. 5 . The apparatus of claim 1 , wherein the one or more processors are further configured to cause the apparatus to receive a grant for reception of the retransmission signal, wherein the grant includes an indication of the one or more CBs to be included in the retransmission signal.
  6. 6 . The apparatus of claim 1 , wherein the one or more processors are configured to cause the apparatus to receive the retransmission signal using the MIMO receiver without shifting the second part of each CB of the one or more CBs within the spectrum with respect to the first part of the CB.
  7. 7 . The apparatus of claim 1 , wherein: each of the one or more CBs in the retransmission signal includes a first part received via the first layer of the MIMO receiver and a second part received via the second layer of the MIMO receiver; and the second part of each of the one or more CBs in the retransmission signal is shifted within the spectrum by at least one resource position with respect to the first part of each of the one or more CBs in the retransmission signal.
  8. 8 . The apparatus of claim 7 , wherein the retransmission signal further comprises at least a head CB received via the second layer of the MIMO receiver, the head CB including data associated with the one or more CBs that have failed the decoding, no data, or data that is different than any data included in the plurality of CBs.
  9. 9 . The apparatus of claim 8 , wherein the one or more processors are further configured to cause the apparatus to receive an indication of whether the head CB includes data associated with the one or more CBs that have failed the decoding, no data, or data that is different than any data included in the plurality of CBs.
  10. 10 . The apparatus of claim 1 , wherein the one or more processors are further configured to cause the apparatus to: store, in memory, at least a portion of the received signal; and retrieve at least the portion of the received signal from the memory; and decode at least the portion of the received signal as retrieved from the memory based on the one or more CBs included in the retransmission signal.
  11. 11 . The apparatus of claim 10 , wherein at least the portion of the received signal that is stored comprises one or more other CBs of the plurality of CBs to be decoded using interference cancellation at the UE after the one or more CBs in the retransmission signal are decoded.
  12. 12 . The apparatus of claim 1 , wherein the one or more processors are further configured to cause the apparatus to: generate log-likelihood ratios (LLRs) for one or more subsequent CBs after the decoding for the one or more CBs has failed; and perform decoding for the retransmission signal using linear minimum mean square error (LMMSE) or non-linear demodulation, the decoding for the retransmission signal being performed based on the LLRs.
  13. 13 . The apparatus of claim 1 , wherein the one or more processors are further configured to cause the apparatus to: generate LLRs for one or more subsequent CBs after the decoding for the one or more CBs has failed; and perform decoding for the retransmission signal using interference cancellation, the decoding for the retransmission signal being performed based on the LLRs.
  14. 14 . The apparatus of claim 13 , wherein the one or more processors are configured to cause the apparatus to perform the interference cancellation using hard decisions associated with the LLRs.
  15. 15 . The apparatus of claim 1 , wherein the one or more processors are further configured to cause the apparatus to transmit capability information indicating at least one of: whether the UE is capable of storing at least one of the received signal or LLRs associated with the received signal; one or more parameters indicating a buffering capability of the UE; whether the UE supports continuing decoding one or more other CBs of the received signal after the one or more CBs have failed decoding; a layer mapping scheme supported by the UE for reception of the retransmission signal; or whether the UE is capable of performing decoding of the plurality of CBs from both sides of the spectrum.
  16. 16 . An apparatus for wireless communication, comprising: at least one memory comprising computer-executable instructions; and one or more processors configured to execute the computer-executable instructions and cause the apparatus to: transmit, to a user equipment (UE) a signal using a multiple-input multiple-output (MIMO) transmitter, wherein the signal includes a plurality of code blocks (CBs), each of the plurality of CBs including a first part transmitted via a first layer of the MIMO transmitter and a second part transmitted via a second layer of the MIMO transmitter, wherein the second part of each of the plurality of CBs is shifted within a spectrum by at least one resource position with respect to the first part of each of the plurality of CBs; receive an indication of one or more CBs of the plurality of CBs that have failed decoding; and transmit a retransmission signal including at least the one or more CBs that have failed the decoding.
  17. 17 . The apparatus of claim 16 , wherein the retransmission signal includes only the one or more CBs that have failed the decoding.
  18. 18 . The apparatus of claim 16 , wherein the retransmission signal includes the one or more CBs that have failed the decoding and one or more other CBs of the plurality of CBs.
  19. 19 . The apparatus of claim 16 , wherein the one or more processors are further configured to cause the apparatus to transmit a grant for reception of the retransmission signal, wherein the grant includes an indication of the one or more CBs to be included in the retransmission signal.
  20. 20 . The apparatus of claim 16 , wherein the one or more processors are configured to cause the apparatus to transmit the retransmission signal using the MIMO transmitter without shifting the second part of each CB of the one or more CBs within the spectrum with respect to the first part of the CB.

Description

FIELD OF THE DISCLOSURE Aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for multiple-input multiple-output (MIMO) communications. DESCRIPTION OF RELATED ART Wireless communications systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, broadcasts, or other similar types of services. These wireless communications systems may employ multiple-access technologies capable of supporting communications with multiple users by sharing available wireless communications system resources with those users. Although wireless communications systems have made great technological advancements over many years, challenges still exist. For example, complex and dynamic environments can still attenuate or block signals between wireless transmitters and wireless receivers. Accordingly, there is a continuous desire to improve the technical performance of wireless communications systems, including, for example: improving speed and data carrying capacity of communications, improving efficiency of the use of shared communications mediums, reducing power used by transmitters and receivers while performing communications, improving reliability of wireless communications, avoiding redundant transmissions and/or receptions and related processing, improving the coverage area of wireless communications, increasing the number and types of devices that can access wireless communications systems, increasing the ability for different types of devices to intercommunicate, increasing the number and type of wireless communications mediums available for use, and the like. Consequently, there exists a need for further improvements in wireless communications systems to overcome the aforementioned technical challenges and others. SUMMARY One aspect provides a method for wireless communication at a user equipment (UE). The method includes receiving a signal using a multiple-input multiple-output (MIMO) receiver, wherein the signal includes a plurality of code blocks (CBs), each of the plurality of CBs including a first part received via a first layer of the MIMO receiver and a second part received via a second layer of the MIMO receiver, wherein the second part of each of the plurality of CBs is shifted within a spectrum by at least one resource position with respect to the first part of each of the plurality of CBs; transmitting an indication of one or more CBs of the plurality of CBs that have failed decoding at the UE; and receiving a retransmission signal including at least the one or more CBs that have failed the decoding at the UE. Another aspect provides a method for wireless communication at a network entity. The method includes transmitting, to a UE a signal using a MIMO transmitter, wherein the signal includes a plurality of CBs, each of the plurality of CBs including a first part transmitted via a first layer of the MIMO transmitter and a second part transmitted via a second layer of the MIMO transmitter, wherein the second part of each of the plurality of CBs is shifted within a spectrum by at least one resource position with respect to the first part of each of the plurality of CBs; receiving an indication of one or more CBs of the plurality of CBs that have failed decoding; and transmitting a retransmission signal including at least the one or more CBs that have failed the decoding. Other aspects provide: an apparatus operable, configured, or otherwise adapted to perform any one or more of the aforementioned methods and/or those described elsewhere herein; a non-transitory, computer-readable media comprising instructions that, when executed (e.g., directly, indirectly, after pre-processing, without pre-processing) by one or more processors of an apparatus, cause the apparatus to perform the aforementioned methods as well as those described elsewhere herein; a computer program product embodied on a computer-readable storage medium comprising code for performing the aforementioned methods as well as those described elsewhere herein; and/or an apparatus comprising means for performing the aforementioned methods as well as those described elsewhere herein. By way of example, an apparatus may comprise a processing system, a device with a processing system, or processing systems cooperating over one or more networks. The following description and the appended figures set forth certain features for purposes of illustration. BRIEF DESCRIPTION OF DRAWINGS The appended figures depict certain features of the various aspects described herein and are not to be considered limiting of the scope of this disclosure. FIG. 1 depicts an example wireless communications network. FIG. 2 depicts an example disaggregated base station architecture. FIG. 3 depicts aspects of an example base station and an example user equipment. FIGS. 4A, 4B, 4C, and 4D depict various example aspects of data structures for a wireless communications network. FIG.