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US-12621200-B2 - Signaling and padding methods for probabilistic shaping QAM transmission in wireless communications

US12621200B2US 12621200 B2US12621200 B2US 12621200B2US-12621200-B2

Abstract

Techniques pertaining to signaling and padding methods for probabilistic shaping quadrature amplitude modulation (QAM) transmission in wireless communications are described. An apparatus (e.g., station (STA)) generates a packet using a probabilistic shaping (PS) 4096 quadrature amplitude modulation (4096QAM) such that a length of the packet is extended. The apparatus then transmits the packet in a wireless communication.

Inventors

  • Shengquan Hu
  • Jianhan Liu
  • Thomas Edward Pare, Jr.

Assignees

  • MEDIATEK INC.

Dates

Publication Date
20260505
Application Date
20230920

Claims (15)

  1. 1 . A method, comprising: generating, by a processor of an apparatus, a packet using probabilistic shaping (PS) 4096 quadrature amplitude modulation (4096QAM) such that a length of the packet is extended from an original length to an extended length; and transmitting, by the processor, the packet in a wireless communication, wherein the generating of the packet comprises determining a parameter by which the length of the packet is to be extended, wherein the parameter represents a percentage of an increase in a length of a bit sequence being output by a PS mapper compared to a length of a bit sequence input to the PS mapper, wherein a value of the parameter is fixed or configurable, wherein the packet comprises a physical layer convergence protocol (PLCP) service data unit (PSDU), wherein the generating of the packet further comprises calculating the extended length of the packet by: exPSDU_LENGTH=[(PSDU_LENGTH+2)*(1+α)]−2 wherein: exPSDU_LENGTH denotes the extended length of the packet, PSDU_LENGTH denotes an original length of the packet, and α denotes the parameter in terms of a percentage of an increase in the length of the packet.
  2. 2 . The method of claim 1 , wherein a value of the parameter is in a range of 9%˜12% of an original length of the packet.
  3. 3 . The method of claim 1 , wherein the generating of the packet further comprises performing, based on the extended length of the packet, pre-forward error correction (pre-FEC) padding and post-FEC padding after the PS mapping.
  4. 4 . The method of claim 1 , wherein the transmitting of the packet comprises transmitting the packet with one or more bits added in a ultra-high reliability (UHR) signal (UHR_SIG) field of the packet to indicate the parameter which represents the increase in the length of the packet.
  5. 5 . The method of claim 1 , wherein the transmitting of the packet comprises calculating a number of symbols, a transmission time and a total length using the extended length of the packet, and wherein the transmitting of the packet comprises indicating the total length of the packet in a legacy signal (L_SIG) field of the packet.
  6. 6 . The method of claim 1 , wherein the generating of the packet further comprises choosing either or both of regular 4096QAM and PS-4096QAM for modulation based on a regular 4096QAM capability and a PS-4096QAM capability of the processor.
  7. 7 . The method of claim 6 , wherein the transmitting of the packet comprises transmitting the packet with modulation and coding scheme (MCS) subfields in a ultra-high reliability (UHR) signal (UHR_SIG) field of the packet indicating either or both of the regular 4096QAM and the PS-4096QAM which corresponding to different MCSs.
  8. 8 . A method, comprising: receiving, by a processor of an apparatus, a packet in a wireless communication; and processing, by the processor, the packet which was generated using probabilistic shaping (PS) 4096 quadrature amplitude modulation (4096QAM) such that a length of the packet is extended from an original length to an extended length, wherein the processing of the packet comprises decoding a legacy signal (L_SIG) field and an ultra-high reliability (UHR) signal (UHR SIG) field of the packet to determine the extended length of the packet.
  9. 9 . The method of claim 8 , wherein the packet comprises a physical layer convergence protocol (PLCP) service data unit (PSDU), and wherein the determining of the extended length of the packet comprises calculating the extended length of the packet by: exPSDU_LENGTH=[(PSDU_LENGTH+2)*(1+α)]−2 wherein: exPSDU_LENGTH denotes the extended length of the packet, PSDU_LENGTH denotes an original length of the packet, and α denotes a parameter in terms of a percentage of an increase in the length of the packet.
  10. 10 . The method of claim 9 , wherein the parameter represents a percentage of an increase in the length of the packet after PS mapping is performed at a transmitter side relative to a length of an input sequence to the PS mapping.
  11. 11 . The method of claim 9 , wherein a value of the parameter is fixed or configurable.
  12. 12 . The method of claim 9 , wherein a value of the parameter is in a range of 9%˜12% of an original length of the packet.
  13. 13 . An apparatus, comprising: a transceiver configured to communicate wirelessly; and a processor coupled to the transceiver and configured to perform operations comprising: generating a packet using probabilistic shaping (PS) 4096 quadrature amplitude modulation (4096QAM) such that a length of the packet is extended; and transmitting, via the transceiver, the packet in a wireless communication, wherein the generating of the packet comprises determining a parameter by which the length of the packet is to be extended, wherein the parameter represents a percentage of an increase in a length of a bit sequence being output by a PS mapper compared to a length of a bit sequence input to the PS mapper, wherein a value of the parameter is fixed or configurable, wherein the packet comprises a physical layer convergence protocol (PLCP) service data unit (PSDU), wherein the generating of the packet further comprises calculating the extended length of the packet by: exPSDU_LENGTH=[(PSDU_LENGTH+2)*(1+α)]−2 wherein: exPSDU_LENGTH denotes the extended length of the packet, PSDU_LENGTH denotes an original length of the packet, and α denotes the parameter in terms of a percentage of an increase in the length of the packet.
  14. 14 . The apparatus of claim 4 , wherein a value of the parameter is in a range of 9%˜12% of an original length of the packet.
  15. 15 . The apparatus of claim 14 , wherein the generating of the packet further comprises performing, based on the extended length of the packet, pre-forward error correction (pre-FEC) padding and post-FEC padding after the PS mapping, and wherein the transmitting of the packet comprises transmitting the packet with one or more bits added in a ultra-high reliability (UHR) signal (UHR_SIG) field of the packet to indicate the parameter which represents the increase in the length of the packet.

Description

CROSS REFERENCE TO RELATED PATENT APPLICATION The present disclosure is part of a non-provisional patent application claiming the priority benefit of U.S. Provisional Patent Application No. 63/376,630, filed 22 Sep. 2022, the content of which herein being incorporated by reference in its entirety. TECHNICAL FIELD The present disclosure is generally related to wireless communications and, more particularly, to signaling and padding methods for probabilistic shaping quadrature amplitude modulation (QAM) transmission in wireless communications. BACKGROUND Unless otherwise indicated herein, approaches described in this section are not prior art to the claims listed below and are not admitted as prior art by inclusion in this section. In wireless communications such as Wi-Fi (or WiFi) in accordance with the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standards, 4096QAM has been adopted in IEEE 802.11 be and is designed to increase about 20% in data rate compared to 1024QAM. Probabilistic shaping (PS) type 4096QAM can provide about 1.5 dB to 2 dB gain compared with the regular, uniformly-distributed 4096QAM under the same effective data rate consideration. However, PS mapper tends to result in varying lengths of output bits sequence, and the issue of varying lengths causes difficulties in at least signaling and padding. Therefore, there is a need for a solution of signaling and padding methods for probabilistic shaping QAM transmission in wireless communications. SUMMARY The following summary is illustrative only and is not intended to be limiting in any way. That is, the following summary is provided to introduce concepts, highlights, benefits and advantages of the novel and non-obvious techniques described herein. Select implementations are further described below in the detailed description. Thus, the following summary is not intended to identify essential features of the claimed subject matter, nor is it intended for use in determining the scope of the claimed subject matter. An objective of the present disclosure is to provide schemes, concepts, designs, techniques, methods and apparatuses pertaining to signaling and padding methods for probabilistic shaping QAM transmission in wireless communications. It is believed that implementations of various proposed schemes in accordance with the present disclosure may alleviate or otherwise address the issue(s) described herein. Signaling and padding mechanisms under the proposed schemes may be able to handle the issue of varying lengths of PS-4096QAM (hereinafter interchangeably referred to as “PS-4KQAM”). Moreover, modulation and coding scheme (MCS) options under the proposed schemes may support both regular 4096QAM and PS-4096QAM, thereby offering flexibilities in implementation-friendly solutions and performance-oriented solutions. In one aspect, a method may involve generating a packet using PS-4096QAM such that a length of the packet is extended. The method may also involve transmitting the packet in a wireless communication. In another aspect, a method may involve receiving a packet in a wireless communication. The method may also involve processing the packet which was generated using PS-4096QAM such that a length of the packet is extended. In yet another aspect, an apparatus may include a transceiver configured to communicate wirelessly and a processor coupled to the transceiver. The processor may generate a packet using PS-4096QAM such that a length of the packet is extended. The processor may also transmit the packet in a wireless communication. It is noteworthy that, although description provided herein may be in the context of certain radio access technologies, networks and network topologies such as, Wi-Fi, the proposed concepts, schemes and any variation(s)/derivative(s) thereof may be implemented in, for and by other types of radio access technologies, networks and network topologies such as, for example and without limitation, Bluetooth, ZigBee, 5th Generation (5G)/New Radio (NR), Long-Term Evolution (LTE), LTE-Advanced, LTE-Advanced Pro, Internet-of-Things (IoT), Industrial IoT (IIoT) and narrowband IoT (NB-IoT). Thus, the scope of the present disclosure is not limited to the examples described herein. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of the present disclosure. The drawings illustrate implementations of the disclosure and, together with the description, serve to explain the principles of the disclosure. It is appreciable that the drawings are not necessarily in scale as some components may be shown to be out of proportion than the size in actual implementation to clearly illustrate the concept of the present disclosure. FIG. 1 is a diagram of an example network environment in which various solutions and schemes in accordance with the present disclosure may be implemented. FIG. 2 is a diagram