Coding and rate matching designs for uhr enhanced long range wi-fi
Patent Information
- Authority / Receiving Office
- EP · EP
- Patent Type
- Applications
- Current Assignee / Owner
- MEDIATEK INC
- Filing Date
- 2025-08-26
- Publication Date
- 2026-06-17
Smart Images

Figure CN2025117079_05032026_PF_FP_ABST
Abstract
Description
CODING AND RATE MATCHING DESIGNS FOR UHR ENHANCED LONG RANGE WI-FICROSS REFERENCE TO RELATED PATENT APPLICATION
[0001] The present disclosure is part of a non-provisional patent application claiming the priority benefit of U.S. Provisional Patent Application No. 63 / 686,891, filed 26 August 2024, the content of which herein being incorporated by reference in its entirety.TECHNICAL FIELD
[0002] The present disclosure is generally related to wireless communications and, more particularly, to coding and rate matching designs for Ultra-High-Reliability (UHR) enhanced long range (ELR) Wi-Fi.BACKGROUND
[0003] 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.
[0004] With respect to wireless communications, such as in accordance with the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standards, ELR is one of the physical-layer (PHY) features in IEEE 802.11bn to improve system performance at different signal-to-interference-and-noise ratio (SINR) levels. Data transmission with a 52-tone regular resource unit (RRU52) with four times (4x) duplication in the frequency domain may be utilized for ELR. However, at the time of the present disclosure, how to simplify ELR signaling has yet to be defined. Therefore, there is a need for a solution of coding and rate matching designs for UHR ELR Wi-Fi.SUMMARY
[0005] 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.
[0006] An objective of the present disclosure is to provide schemes, concepts, designs, techniques, methods and apparatuses pertaining to coding and rate matching designs for UHR ELR Wi-Fi. It is believed that implementations of one or more of the various proposed schemes in accordance with the present disclosure may address or otherwise alleviate the issue (s) described above. That is, under the proposed schemes, low-density parity-check (LDPC) and binary convolutional coding (BCC) coding and rate matching may be simplified. For instance, a fixed pre-forward error correction (pre-FEC) padding factor may be set a 4 (e.g., pre-FEC padding boundary may be always at the end of the last orthogonal frequency-division multiplexing (OFDM) symbol. Additionally, a LDPC extra symbol segment may be always forced to 0 or 1. Alternatively, or additionally, the LDPC extra symbol segment for an ELR physical-layer protocol data unit (PPDU) may be redefined as in IEEE 802.11ac (e.g., by adding one extra OFDM symbol instead of one extra segment) .
[0007] In one aspect, a method may involve an apparatus generating an ELR PPDU comprising a plurality of OFDM symbols. The method may also involve the apparatus transmitting the ELR PPDU in a wireless communication. In generating the ELR PPDU, the method may involve the apparatus generating the ELR PPDU with simplified coding and rate matching.
[0008] In another aspect, an apparatus may include a transceiver configured to communicate wirelessly and a processor coupled to the transceiver. The processor may generate an ELR PPDU comprising a plurality of OFDM symbols. The processor may also transmit, via the transceiver, the ELR PPDU in a wireless communication. In generating the ELR PPDU, the processor may generate the ELR PPDU with simplified coding and rate matching.
[0009] 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
[0010] 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.
[0011] 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.
[0012] FIG. 2 is a diagram of an example design under a proposed scheme in accordance with the present disclosure.
[0013] FIG. 3 is a diagram of an example design under a proposed scheme in accordance with the present disclosure.
[0014] FIG. 4 is a diagram of an example design under a proposed scheme in accordance with the present disclosure.
[0015] FIG. 5 is a diagram of an example design under a proposed scheme in accordance with the present disclosure.
[0016] FIG. 6 is a diagram of an example design under a proposed scheme in accordance with the present disclosure.
[0017] FIG. 7 is a diagram of an example design under a proposed scheme in accordance with the present disclosure.
[0018] FIG. 8 is a block diagram of an example communication system in accordance with an implementation of the present disclosure.
[0019] FIG. 9 is a flowchart of an example process in accordance with an implementation of the present disclosure. DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
[0020] Detailed embodiments and implementations of the claimed subject matters are disclosed herein. However, it shall be understood that the disclosed embodiments and implementations are merely illustrative of the claimed subject matters which may be embodied in various forms. The present disclosure may, however, be embodied in many different forms and should not be construed as limited to the exemplary embodiments and implementations set forth herein. Rather, these exemplary embodiments and implementations are provided so that description of the present disclosure is thorough and complete and will fully convey the scope of the present disclosure to those skilled in the art. In the description below, details of well-known features and techniques may be omitted to avoid unnecessarily obscuring the presented embodiments and implementations. Overview
[0021] Implementations in accordance with the present disclosure relate to various techniques, methods, schemes and / or solutions pertaining to coding and rate matching designs for UHR ELR Wi-Fi. According to the present disclosure, a number of possible solutions may be implemented separately or jointly. That is, although these possible solutions may be described below separately, two or more of these possible solutions may be implemented in one combination or another.
[0022] FIG. 1 illustrates an example network environment 100 in which various solutions and schemes in accordance with the present disclosure may be implemented. FIG. 2 ~ FIG. 9 illustrate examples of implementation of various proposed schemes in network environment 100 in accordance with the present disclosure. The following description of various proposed schemes is provided with reference to FIG. 1 ~ FIG. 9.
[0023] Referring to FIG. 1, network environment 100 may involve at least a station (STA) 110 communicating wirelessly with a STA 120. Either of STA 110 and STA 120 may function as an access point (AP) STA or a non-AP STA. In some cases, STA 110 and STA 120 may be associated with a basic service set (BSS) in accordance with one or more IEEE 802.11 standards (e.g., IEEE 802.11be and future-developed standards) . Each of STA 110 and STA 120 may be configured to communicate with each other by utilizing the coding and rate matching designs for UHR ELR Wi-Fi in accordance with various proposed schemes described below. That is, either or both of STA 110 and STA 120 may function as a “user” in the proposed schemes and examples described below. It is noteworthy that, while the various proposed schemes may be individually or separately described below, in actual implementations some or all of the proposed schemes may be utilized or otherwise implemented jointly. Of course, each of the proposed schemes may be utilized or otherwise implemented individually or separately.
[0024] FIG. 2 illustrates an example design 200 under a proposed scheme in accordance with the present disclosure. Design 200 pertains to BCC coding for ELR PPDUs. Referring to FIG. 2, the same BCC pre-FEC padding and encoding process as defined in IEEE 802.11ax / be may be followed with some minor modifications to the IEEE 802.11ax / be specifications shown in FIG. 2. For instance, the pre-FEC padding boundary may be always at the end of the last OFDM symbol (e.g., basically the same as in IEEE 802.11ac) .
[0025] With respect to LDPC coding for ELR PPDUs, in IEEE 802.11ac, the number of data carrying subcarriers, Nsd, is 52 for bandwidth 20MHz (BW20) . The pre-FEC padding boundary is at the end of the last OFDM symbol. The LDPC extra symbol is either 0 or 1. For ELR PPDUs, data transmission may use RRU52 with four times duplication in the frequency domain, with Nsd = 48. Under a proposed scheme in accordance with the present disclosure, to simplify the signaling, the pre-FEC padding factor may be fixed at a predefined value (e.g., pre-FEC padding factor = 4) , with the pre-FEC padding boundary being at the end of the last OFDM symbol, with no post-FEC padding. However, in IEEE 802.11ax / be, the parameter a-factor (the pre-FEC padding factor a_init) and the number of symbols, Nsym, may be determined by both the initial value of the a_init and LDPC extra symbol segment.
[0026] FIG. 3 illustrates an example design 300 under a proposed scheme in accordance with the present disclosure. FIG. 4 illustrates an example design 400 under Option-1. Design 300 pertains to a first option (Option-1) of LDPC coding for ELR PPDUs. Under the proposed scheme, consistent with BCC coding, the pre-FEC padding factor may be fixed at a predefined value (e.g., a_init = 4) such that the pre-FEC padding boundary may be always at the boundary of the last OFDM symbol. Additionally, the LDPC extra symbol may be always forced to 1 (e.g., LDPC extra symbol = 1) or with the LDPC extra symbol segment redefined as in IEEE 802.11ac (e.g., by adding one more OFDM symbol instead of one segment) . Basically, in Option-1, LDPC coding for ELR PPDUs may be the same as IEEE 802.11ac by forcing LDPC extra symbol = 1. Referring to FIG. 4, some modifications may be made to the IEEE 802.11ax / be specification for LDPC coding for ELR PPDUs under Option-1.
[0027] FIG. 5 illustrates an example design 500 under a proposed scheme in accordance with the present disclosure. Design 500 pertains to a second option (Option-2) of LDPC coding for ELR PPDUs. Under the proposed scheme, consistent with BCC coding, the pre-FEC padding factor may be fixed at a predefined value (e.g., a_init = 4) such that the pre-FEC padding boundary may be always at the boundary of the last OFDM symbol. Additionally, the LDPC extra symbol may be always forced to 0 (e.g., LDPC extra symbol = 0) . Basically, in Option-1, LDPC coding for ELR PPDUs may be the same as IEEE 802.11ac by forcing LDPC extra symbol = 0.
[0028] FIG. 6 illustrates an example design 600 under a proposed scheme in accordance with the present disclosure. Design 600 pertains to a third option (Option-3) of LDPC coding for ELR PPDUs. Under the proposed scheme, the pre-FEC padding factor may be fixed at a predefined value (e.g., a_init = 3) . Additionally, the LDPC extra symbol may be always forced to 1 (e.g., LDPC extra symbol = 1) .
[0029] FIG. 7 illustrates an example design 700 under a proposed scheme in accordance with the present disclosure. Design 700 pertains to a fourth option (Option-4) of LDPC coding for ELR PPDUs. Under the proposed scheme, the pre-FEC padding factor may be fixed at a predefined value (e.g., a_init = 2) . Additionally, the LDPC extra symbol may be always forced to 1 (e.g., LDPC extra symbol = 1) and be redefined by adding two extra segments. Illustrative Implementations
[0030] FIG. 8 illustrates an example system 800 having at least an example apparatus 810 and an example apparatus 820 in accordance with an implementation of the present disclosure. Each of apparatus 810 and apparatus 820 may perform various functions to implement schemes, techniques, processes and methods described herein pertaining to coding and rate matching designs for UHR ELR Wi-Fi, including the various schemes described above with respect to various proposed designs, concepts, schemes, systems and methods described above as well as processes described below. For instance, apparatus 810 may be implemented in STA 110 and apparatus 820 may be implemented in STA 120, or vice versa.
[0031] Each of apparatus 810 and apparatus 820 may be a part of an electronic apparatus, which may be a non-AP STA or an AP STA, such as a portable or mobile apparatus, a wearable apparatus, a wireless communication apparatus or a computing apparatus. When implemented in a STA, each of apparatus 810 and apparatus 820 may be implemented in a smartphone, a smart watch, a personal digital assistant, a digital camera, or a computing equipment such as a tablet computer, a laptop computer or a notebook computer. Each of apparatus 810 and apparatus 820 may also be a part of a machine type apparatus, which may be an IoT apparatus such as an immobile or a stationary apparatus, a home apparatus, a wire communication apparatus or a computing apparatus. For instance, each of apparatus 810 and apparatus 820 may be implemented in a smart thermostat, a smart fridge, a smart door lock, a wireless speaker or a home control center. When implemented in or as a network apparatus, apparatus 810 and / or apparatus 820 may be implemented in a network node, such as an AP in a WLAN.
[0032] In some implementations, each of apparatus 810 and apparatus 820 may be implemented in the form of one or more integrated-circuit (IC) chips such as, for example and without limitation, one or more single-core processors, one or more multi-core processors, one or more reduced-instruction set computing (RISC) processors, or one or more complex-instruction-set-computing (CISC) processors. In the various schemes described above, each of apparatus 810 and apparatus 820 may be implemented in or as a STA or an AP. Each of apparatus 810 and apparatus 820 may include at least some of those components shown in FIG. 8 such as a processor 812 and a processor 822, respectively, for example. Each of apparatus 810 and apparatus 820 may further include one or more other components not pertinent to the proposed scheme of the present disclosure (e.g., internal power supply, display device and / or user interface device) , and, thus, such component (s) of apparatus 810 and apparatus 820 are neither shown in FIG. 8 nor described below in the interest of simplicity and brevity.
[0033] In one aspect, each of processor 812 and processor 822 may be implemented in the form of one or more single-core processors, one or more multi-core processors, one or more RISC processors or one or more CISC processors. That is, even though a singular term “aprocessor” is used herein to refer to processor 812 and processor 822, each of processor 812 and processor 822 may include multiple processors in some implementations and a single processor in other implementations in accordance with the present disclosure. In another aspect, each of processor 812 and processor 822 may be implemented in the form of hardware (and, optionally, firmware) with electronic components including, for example and without limitation, one or more transistors, one or more diodes, one or more capacitors, one or more resistors, one or more inductors, one or more memristors and / or one or more varactors that are configured and arranged to achieve specific purposes in accordance with the present disclosure. In other words, in at least some implementations, each of processor 812 and processor 822 is a special-purpose machine specifically designed, arranged and configured to perform specific tasks including those pertaining to coding and rate matching designs for UHR ELR Wi-Fi in accordance with various implementations of the present disclosure.
[0034] In some implementations, apparatus 810 may also include a transceiver 816 coupled to processor 812. Transceiver 816 may include a transmitter capable of wirelessly transmitting and a receiver capable of wirelessly receiving data. In some implementations, apparatus 820 may also include a transceiver 826 coupled to processor 822. Transceiver 826 may include a transmitter capable of wirelessly transmitting and a receiver capable of wirelessly receiving data. It is noteworthy that, although transceiver 816 and transceiver 826 are illustrated as being external to and separate from processor 812 and processor 822, respectively, in some implementations, transceiver 816 may be an integral part of processor 812 as a system on chip (SoC) , and transceiver 826 may be an integral part of processor 822 as a SoC.
[0035] In some implementations, apparatus 810 may further include a memory 814 coupled to processor 812 and capable of being accessed by processor 812 and storing data therein. In some implementations, apparatus 820 may further include a memory 824 coupled to processor 822 and capable of being accessed by processor 822 and storing data therein. Each of memory 814 and memory 824 may include a type of random-access memory (RAM) such as dynamic RAM (DRAM) , static RAM (SRAM) , thyristor RAM (T-RAM) and / or zero-capacitor RAM (Z-RAM) . Alternatively, or additionally, each of memory 814 and memory 824 may include a type of read-only memory (ROM) such as mask ROM, programmable ROM (PROM) , erasable programmable ROM (EPROM) and / or electrically erasable programmable ROM (EEPROM) . Alternatively, or additionally, each of memory 814 and memory 824 may include a type of non-volatile random-access memory (NVRAM) such as flash memory, solid-state memory, ferroelectric RAM (FeRAM) , magnetoresistive RAM (MRAM) and / or phase-change memory.
[0036] Each of apparatus 810 and apparatus 820 may be a communication entity capable of communicating with each other using various proposed schemes in accordance with the present disclosure. For illustrative purposes and without limitation, a description of the capabilities of apparatus 810 and apparatus 820, each functioning as an AP or an associated non-AP STA, respectively, is provided below in the context of example process 900. It is noteworthy that, although a detailed description of capabilities, functionalities and / or technical features of either of apparatus 810 and apparatus 820 is provided below, the same may be applied to the other of apparatus 810 and apparatus 820 although a detailed description thereof is not provided solely in the interest of brevity. It is also noteworthy that, although the example implementations described below are provided in the context of WLAN, the same may be implemented in other types of networks. Illustrative Processes
[0037] FIG. 9 illustrates an example process 900 in accordance with an implementation of the present disclosure. Process 900 may represent an aspect of implementing various proposed designs, concepts, schemes, systems and methods described above. More specifically, process 900 may represent an aspect of the proposed concepts and schemes pertaining to coding and rate matching designs for UHR ELR Wi-Fi in accordance with the present disclosure. Process 900 may include one or more operations, actions, or functions as illustrated by one or more of blocks as well as subblocks. Although illustrated as discrete blocks, various blocks of process 900 may be divided into additional blocks, combined into fewer blocks, or eliminated, depending on the desired implementation. Moreover, the blocks / sub-blocks of process 900 may be executed in the order shown in FIG. 9 or, alternatively, in a different order. Furthermore, one or more of the blocks / sub-blocks of process 900 may be executed repeatedly or iteratively. Process 900 may be implemented by or in apparatus 810 and apparatus 820 as well as any variations thereof. Solely for illustrative purposes and without limiting the scope, process 900 is described below in the context of apparatus 810 implemented in or as STA 110 and apparatus 820 implemented in or as STA 120 of a wireless network such as a WLAN in network environment 100 in accordance with one or more of IEEE 802.11 standards. Process 900 may begin at block 910.
[0038] At 910, process 900 may involve processor 812 of apparatus 810 generating an ELR PPDU comprising a plurality of OFDM symbols by generating the ELR PPDU with simplified coding and rate matching. Process 900 may proceed from 910 to 920.
[0039] At 920, process 900 may involve processor 812 transmitting, via transceiver 816, the ELR PPDU in a wireless communication.
[0040] In some implementations, in generating the ELR PPDU with simplified coding and rate matching, process 900 may involve processor 812 generating the ELR PPDU with LDPC coding with a fixed pre-FEC padding factor.
[0041] In some implementations, the pre-FEC padding factor may be 4.
[0042] In some implementations, a pre-FEC padding boundary may be at an end of a last OFDM symbol of the plurality of OFDM symbols.
[0043] In some implementations, in generating the ELR PPDU with simplified coding and rate matching, process 900 may further involve processor 812 generating the ELR PPDU with an LDPC extra symbol being 1.
[0044] In some implementations, in generating the ELR PPDU with simplified coding and rate matching, process 900 may further involve processor 812 generating the ELR PPDU with one more OFDM symbol instead of one extra segment.
[0045] In some implementations, a pre-FEC padding boundary may be at a boundary of a last OFDM symbol of the plurality of OFDM symbols.
[0046] In some implementations, in generating the ELR PPDU with simplified coding and rate matching, process 900 may further involve processor 812 generating the ELR PPDU with an LDPC extra symbol being 0.
[0047] In some implementations, in generating the ELR PPDU with simplified coding and rate matching, process 900 may involve processor 812 generating the ELR PPDU with BCC with a fixed pre-FEC padding boundary being at an end of a last OFDM symbol of the plurality of OFDM symbols.
[0048] In some implementations, in transmitting the ELR PPDU, process 900 may involve processor 812 transmitting the ELR PPDU with a RRU52 with 4x duplication in a frequency domain with a number of data carrying subcarriers, Nsd, being 48. Additional Notes
[0049] The herein-described subject matter sometimes illustrates different components contained within, or connected with, different other components. It is to be understood that such depicted architectures are merely examples, and that in fact many other architectures can be implemented which achieve the same functionality. In a conceptual sense, any arrangement of components to achieve the same functionality is effectively "associated" such that the desired functionality is achieved. Hence, any two components herein combined to achieve a particular functionality can be seen as "associated with" each other such that the desired functionality is achieved, irrespective of architectures or intermedial components. Likewise, any two components so associated can also be viewed as being "operably connected" , or "operably coupled" , to each other to achieve the desired functionality, and any two components capable of being so associated can also be viewed as being "operably couplable" , to each other to achieve the desired functionality. Specific examples of operably couplable include but are not limited to physically mateable and / or physically interacting components and / or wirelessly interactable and / or wirelessly interacting components and / or logically interacting and / or logically interactable components.
[0050] Further, with respect to the use of substantially any plural and / or singular terms herein, those having skill in the art can translate from the plural to the singular and / or from the singular to the plural as is appropriate to the context and / or application. The various singular / plural permutations may be expressly set forth herein for sake of clarity.
[0051] Moreover, it will be understood by those skilled in the art that, in general, terms used herein, and especially in the appended claims, e.g., bodies of the appended claims, are generally intended as “open” terms, e.g., the term “including” should be interpreted as “including but not limited to, ” the term “having” should be interpreted as “having at least, ” the term “includes” should be interpreted as “includes but is not limited to, ” etc. It will be further understood by those within the art that if a specific number of an introduced claim recitation is intended, such an intent will be explicitly recited in the claim, and in the absence of such recitation no such intent is present. For example, as an aid to understanding, the following appended claims may contain usage of the introductory phrases "at least one" and "one or more" to introduce claim recitations. However, the use of such phrases should not be construed to imply that the introduction of a claim recitation by the indefinite articles "a" or "an" limits any particular claim containing such introduced claim recitation to implementations containing only one such recitation, even when the same claim includes the introductory phrases "one or more" or "at least one" and indefinite articles such as "a" or "an, " e.g., “a” and / or “an” should be interpreted to mean “at least one” or “one or more; ” the same holds true for the use of definite articles used to introduce claim recitations. In addition, even if a specific number of an introduced claim recitation is explicitly recited, those skilled in the art will recognize that such recitation should be interpreted to mean at least the recited number, e.g., the bare recitation of "two recitations, " without other modifiers, means at least two recitations, or two or more recitations. Furthermore, in those instances where a convention analogous to “at least one of A, B, and C, etc. ” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention, e.g., “a system having at least one of A, B, and C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and / or A, B, and C together, etc. In those instances where a convention analogous to “at least one of A, B, or C, etc. ” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention, e.g., “a system having at least one of A, B, or C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and / or A, B, and C together, etc. It will be further understood by those within the art that virtually any disjunctive word and / or phrase presenting two or more alternative terms, whether in the description, claims, or drawings, should be understood to contemplate the possibilities of including one of the terms, either of the terms, or both terms. For example, the phrase “A or B” will be understood to include the possibilities of “A” or “B” or “A and B. ”
[0052] From the foregoing, it will be appreciated that various implementations of the present disclosure have been described herein for purposes of illustration, and that various modifications may be made without departing from the scope and spirit of the present disclosure. Accordingly, the various implementations disclosed herein are not intended to be limiting, with the true scope and spirit being indicated by the following claims.
Claims
1.A method, comprising:generating, by a processor of an apparatus, an enhanced long range (ELR) physical-layer protocol data unit (PPDU) comprising a plurality of orthogonal frequency-division multiplexing (OFDM) symbols; andtransmitting, by the processor, the ELR PPDU in a wireless communication,wherein the generating of the ELR PPDU comprises generating the ELR PPDU with simplified coding and rate matching.2.The method of Claim 1, wherein the generating of the ELR PPDU with simplified coding and rate matching comprises generating the ELR PPDU with low-density parity-check (LDPC) coding with a fixed pre-forward error correction (pre-FEC) padding factor.3.The method of Claim 2, wherein the pre-FEC padding factor is 4.4.The method of Claim 2, wherein a pre-FEC padding boundary is at an end of a last OFDM symbol of the plurality of OFDM symbols.5.The method of Claim 2, wherein the generating of the ELR PPDU with simplified coding and rate matching further comprises generating the ELR PPDU with an LDPC extra symbol being 1.6.The method of Claim 2, wherein the generating of the ELR PPDU with simplified coding and rate matching further comprises generating the ELR PPDU with one more OFDM symbol instead of one extra segment.7.The method of Claim 2, wherein a pre-FEC padding boundary is at a boundary of a last OFDM symbol of the plurality of OFDM symbols.8.The method of Claim 2, wherein the generating of the ELR PPDU with simplified coding and rate matching further comprises generating the ELR PPDU with an LDPC extra symbol being 0.9.The method of Claim 1, wherein the generating of the ELR PPDU with simplified coding and rate matching comprises generating the ELR PPDU with binary convolutional coding (BCC) with a fixed pre-forward error correction (pre-FEC) padding boundary being at an end of a last OFDM symbol of the plurality of OFDM symbols.10.The method of Claim 1, wherein the transmitting of the ELR PPDU comprises transmitting the ELR PPDU with a 52-tone regular resource unit (RRU52) with four times (4x) duplication in a frequency domain with a number of data carrying subcarriers, Nsd, being 48.11.An apparatus, comprising:a transceiver configured to communicate wirelessly; anda processor coupled to the transceiver and configured to perform operations comprising:generating an enhanced long range (ELR) physical-layer protocol data unit (PPDU) comprising a plurality of orthogonal frequency-division multiplexing (OFDM) symbols; andtransmitting, via the transceiver, the ELR PPDU in a wireless communication,wherein the generating of the ELR PPDU comprises generating the ELR PPDU with simplified coding and rate matching.12.The apparatus of Claim 11, wherein the generating of the ELR PPDU with simplified coding and rate matching comprises generating the ELR PPDU with low-density parity-check (LDPC) coding with a fixed pre-forward error correction (pre-FEC) padding factor.13.The apparatus of Claim 12, wherein the pre-FEC padding factor is 4.14.The apparatus of Claim 12, wherein a pre-FEC padding boundary is at an end of a last OFDM symbol of the plurality of OFDM symbols.15.The apparatus of Claim 12, wherein the generating of the ELR PPDU with simplified coding and rate matching further comprises generating the ELR PPDU with an LDPC extra symbol being 1.16.The apparatus of Claim 12, wherein the generating of the ELR PPDU with simplified coding and rate matching further comprises generating the ELR PPDU with one more OFDM symbol instead of one extra segment.17.The apparatus of Claim 12, wherein a pre-FEC padding boundary is at a boundary of a last OFDM symbol of the plurality of OFDM symbols.18.The apparatus of Claim 12, wherein the generating of the ELR PPDU with simplified coding and rate matching further comprises generating the ELR PPDU with an LDPC extra symbol being 0.19.The apparatus of Claim 11, wherein the generating of the ELR PPDU with simplified coding and rate matching comprises generating the ELR PPDU with binary convolutional coding (BCC) with a fixed pre-forward error correction (pre-FEC) padding boundary being at an end of a last OFDM symbol of the plurality of OFDM symbols.20.The apparatus of Claim 11, wherein the transmitting of the ELR PPDU comprises transmitting the ELR PPDU with a 52-tone regular resource unit (RRU52) with four times (4x) duplication in a frequency domain with a number of data carrying subcarriers, Nsd, being 48.