EP-4736353-A1 - SHAPING BITS FOR POLAR CODING

EP4736353A1EP 4736353 A1EP4736353 A1EP 4736353A1EP-4736353-A1

Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless communication device may encode one or more information bits into a plurality of polar code sub-block outputs, identify one or more shaping bits for a first polar code sub-block output of the plurality of polar code sub-block outputs, and transmit a polar-coded codeword derived from at least the first polar code sub-block output and the second polar code sub-block output. In some aspects, a wireless communication device may identify one or more shaping bit subchannels, identify one or more information bit subchannels, and transmit one or more shaping bits in the one or more shaping bit subchannels and one or more information bits in the one or more information bit subchannels. Numerous other aspects are described.

Inventors

WU, Liangming
LIU, WEI
LI, JIAN
IVANOV, KIRILL
YANG, WEI
XIAO, Kexin
XU, CHANGLONG
JIANG, JING
XU, HAO

Assignees

Qualcomm Incorporated

Dates

Publication Date: 20260506
Application Date: 20230630

Claims (20)

A wireless communication device for wireless communication, comprising: one or more memories; and one or more processors, coupled to the one or more memories, configured to: identify one or more shaping bit subchannels of a mother code sequence, wherein the one or more shaping bit subchannels are associated with a first polar code sub-block output; identify one or more information bit subchannels of the mother code sequence; and transmit one or more shaping bits in the one or more shaping bit subchannels and one or more information bits in the one or more information bit subchannels.
The wireless communication device of claim 1, wherein the one or more processors, to identify the one or more shaping bit subchannels, are configured to: identify the one or more shaping bit subchannels based at least in part on first reliability metrics of subchannels associated with at least the first polar code sub-block output and second reliability metrics of subchannels associated with at least a second polar code sub-block output.
The wireless communication device of claim 1, wherein the one or more processors, to identify the one or more shaping bit subchannels, are configured to: identify the one or more shaping bit subchannels based at least in part on first reliability metrics of subchannels associated with the first polar code sub-block output independent of any second reliability metric of subchannels associated with any second polar code sub-block output.
The wireless communication device of claim 3, wherein the one or more processors are further configured to: replace one or more candidate shaping bit subchannels with the one or more shaping bit subchannels based at least in part on the first reliability metrics.
The wireless communication device of claim 1, wherein the one or more processors, to identify the one or more shaping bit subchannels, are configured to perform a combination of: identify the one or more shaping bit subchannels based at least in part on first reliability metrics of subchannels associated with at least the first polar code sub-block output and second reliability metrics of subchannels associated with at least a second polar code sub-block output; and identify the one or more shaping bit subchannels based at least in part on the first reliability metrics independent of the second reliability metrics.
The wireless communication device of claim 1, wherein the one or more processors, to identify the one or more shaping bit subchannels, are configured to: recompute the one or more shaping bit subchannels according to a probability associated with one or more shaped symbols.
The wireless communication device of claim 1, wherein the wireless communication device is a user equipment (UE) .
The wireless communication device of claim 1, wherein the wireless communication device is a network node.
A method of wireless communication performed by a wireless communication device, comprising: identifying one or more shaping bit subchannels of a mother code sequence, wherein the one or more shaping bit subchannels are associated with a first polar code sub-block output; identifying one or more information bit subchannels of the mother code sequence; and transmitting one or more shaping bits in the one or more shaping bit subchannels and one or more information bits in the one or more information bit subchannels.
The method of claim 9, wherein identifying the one or more shaping bit subchannels includes: identifying the one or more shaping bit subchannels based at least in part on first reliability metrics of subchannels associated with at least the first polar code sub-block output and second reliability metrics of subchannels associated with at least a second polar code sub-block output.
The method of claim 9, wherein identifying the one or more shaping bit subchannels includes: identifying the one or more shaping bit subchannels based at least in part on first reliability metrics of subchannels associated with the first polar code sub-block output independent of any second reliability metric of subchannels associated with any second polar code sub-block output.
The method of claim 11, further comprising: replacing one or more candidate shaping bit subchannels with the one or more shaping bit subchannels based at least in part on the first reliability metrics.
The method of claim 9, wherein identifying the one or more shaping bit subchannels includes a combination of: identifying the one or more shaping bit subchannels based at least in part on first reliability metrics of subchannels associated with at least the first polar code sub-block output and second reliability metrics of subchannels associated with at least a second polar code sub-block output; and identifying the one or more shaping bit subchannels based at least in part on the first reliability metrics independent of the second reliability metrics.
The method of claim 9, wherein identifying the one or more shaping bit subchannels includes: recomputing the one or more shaping bit subchannels according to a probability associated with one or more shaped symbols.
The method of claim 9, wherein the wireless communication device is a user equipment (UE) .
The method of claim 9, wherein the wireless communication device is a network node.
A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising: one or more instructions that, when executed by one or more processors of a wireless communication device, cause the wireless communication device to: identify one or more shaping bit subchannels of a mother code sequence, wherein the one or more shaping bit subchannels are associated with a first polar code sub-block output; identify one or more information bit subchannels of the mother code sequence; and transmit one or more shaping bits in the one or more shaping bit subchannels and one or more information bits in the one or more information bit subchannels.
The non-transitory computer-readable medium of claim 17, wherein the one or more instructions, that cause the wireless communication device to identify the one or more shaping bit subchannels, cause the wireless communication device to: identify the one or more shaping bit subchannels based at least in part on first reliability metrics of subchannels associated with at least the first polar code sub-block output and second reliability metrics of subchannels associated with at least a second polar code sub-block output.
The non-transitory computer-readable medium of claim 17, wherein the one or more instructions, that cause the wireless communication device to identify the one or more shaping bit subchannels, cause the wireless communication device to: identify the one or more shaping bit subchannels based at least in part on first reliability metrics of subchannels associated with the first polar code sub-block output independent of any second reliability metric of subchannels associated with any second polar code sub-block output.
The non-transitory computer-readable medium of claim 19, wherein the one or more instructions further cause the wireless communication device to: replace one or more candidate shaping bit subchannels with the one or more shaping bit subchannels based at least in part on the first reliability metrics.

Description

SHAPING BITS FOR POLAR CODING FIELD OF THE DISCLOSURE Aspects of the present disclosure generally relate to wireless communication and to techniques and apparatuses for shaping bits for polar coding. BACKGROUND Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts. Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, or the like) . Examples of such multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and Long Term Evolution (LTE) . LTE/LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP) . A wireless network may include one or more network nodes that support communication for wireless communication devices, such as a user equipment (UE) or multiple UEs. A UE may communicate with a network node via downlink communications and uplink communications. “Downlink” (or “DL” ) refers to a communication link from the network node to the UE, and “uplink” (or “UL” ) refers to a communication link from the UE to the network node. Some wireless networks may support device-to-device communication, such as via a local link (e.g., a sidelink (SL) , a wireless local area network (WLAN) link, and/or a wireless personal area network (WPAN) link, among other examples) . The above multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different UEs to communicate on a municipal, national, regional, and/or global level. New Radio (NR) , which may be referred to as 5G, is a set of enhancements to the LTE mobile standard promulgated by the 3GPP. NR is designed to better support mobile broadband internet access by improving spectral efficiency, lowering costs, improving services, making use of new spectrum, and better integrating with other open standards using orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) (CP-OFDM) on the downlink, using CP-OFDM and/or single-carrier frequency division multiplexing (SC-FDM) (also known as discrete Fourier transform spread OFDM (DFT-s-OFDM) ) on the uplink, as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation. As the demand for mobile broadband access continues to increase, further improvements in LTE, NR, and other radio access technologies remain useful. SUMMARY Some aspects described herein relate to a wireless communication device for wireless communication. The wireless communication device may include one or more memories and one or more processors coupled to the one or more memories. The one or more processors may be configured to encode one or more information bits into a plurality of polar code sub-block outputs. The one or more processors may be configured to identify one or more shaping bits for a first polar code sub-block output of the plurality of polar code sub-block outputs, wherein the first polar code sub-block output is mapped to a first bit level and a second polar code sub-block output of the plurality of the polar code sub-block outputs is mapped to a second bit level, and wherein the second polar code sub-block output is independent from the one or more shaping bits. The one or more processors may be configured to transmit a polar-coded codeword derived from at least the first polar code sub-block output and the second polar code sub-block output. Some aspects described herein relate to a method of wireless communication performed by a wireless communication device. The method may include encoding one or more information bits into a plurality of polar code sub-block outputs. The method may include identifying one or more shaping bits for a first polar code sub-block output of the plurality of polar code sub-block outputs, wherein the first polar code sub-block output is mapped to a first bit level and a second polar code sub-block output of the plurality of the polar code sub-block outputs is mapped to a second bit level, and wherein the second polar code sub-block output is independent from the one or more shaping bits. The method may include transmitting a polar-coded codeword derived from at least the first polar code sub-block output and the second polar code sub-block output. Some aspects described herein relate to a non-transitory computer-readable medium that stores a set of instructions