WO2015149225A1 - 极化码的混合自动重传方法及装置、无线通信装置 - Google Patents
极化码的混合自动重传方法及装置、无线通信装置 Download PDFInfo
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- WO2015149225A1 WO2015149225A1 PCT/CN2014/074398 CN2014074398W WO2015149225A1 WO 2015149225 A1 WO2015149225 A1 WO 2015149225A1 CN 2014074398 W CN2014074398 W CN 2014074398W WO 2015149225 A1 WO2015149225 A1 WO 2015149225A1
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- 230000015654 memory Effects 0.000 claims description 28
- 230000010287 polarization Effects 0.000 description 94
- 238000010586 diagram Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
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- 101000741965 Homo sapiens Inactive tyrosine-protein kinase PRAG1 Proteins 0.000 description 3
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
- H03M13/63—Joint error correction and other techniques
- H03M13/6306—Error control coding in combination with Automatic Repeat reQuest [ARQ] and diversity transmission, e.g. coding schemes for the multiple transmission of the same information or the transmission of incremental redundancy
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
- H03M13/03—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words
- H03M13/05—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using block codes, i.e. a predetermined number of check bits joined to a predetermined number of information bits
- H03M13/13—Linear codes
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
- H03M13/63—Joint error correction and other techniques
- H03M13/635—Error control coding in combination with rate matching
- H03M13/6362—Error control coding in combination with rate matching by puncturing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0061—Error detection codes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0067—Rate matching
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
- H04L1/1819—Hybrid protocols; Hybrid automatic repeat request [HARQ] with retransmission of additional or different redundancy
Definitions
- the present invention relates to the field of communication technologies, and more particularly to a hybrid automatic retransmission method and apparatus for a polarization code, and a wireless communication apparatus. Background technique
- Hybrid Automatic Repeat Request can be used in the communication system for error control.
- polar codes can be used as the mother code.
- the actual code rate of the first transmission may be different due to the channel condition and the condition of the radio resources that can be allocated, etc., but the polarization codes used are the same. Then, when the actual first code rate and the target code rate corresponding to the polarization code are too different, the performance of the first transmission may be lost.
- an object of the embodiments of the present invention is to provide a hybrid automatic retransmission method and apparatus for a polarization code, and a wireless communication apparatus, to solve the problem that the target code rate corresponding to the actual first transmission rate and the polarization code is too large. When the performance of the first transmission is lost, there is a problem.
- the embodiment of the present invention provides the following technical solutions:
- a hybrid automatic retransmission HARQ method for a polarization code is provided, which is based on M polarization codes having the same code length and code rate, and the M is greater than or equal to 2;
- the method includes:
- Rate matching the encoded bits to generate bits to be transmitted Rate matching the encoded bits to generate bits to be transmitted.
- a hybrid automatic retransmission HARQ device for a polarization code including: The coding unit is configured to select a polarization code corresponding to the actual first transmission rate from the M polarization codes having the same code length and the code rate, and perform polarization coding on the information bit sequence to obtain the coded Bit; the M is greater than or equal to 2;
- a rate matching unit configured to perform rate matching on the encoded bits to generate a bit to be transmitted.
- a wireless communication apparatus includes a processor and a memory, the processor operating at least a software program stored in the memory and calling data stored in the memory Perform the following steps:
- Rate matching the encoded bits to generate bits to be transmitted is used.
- M (more than one) polarization codes are preset.
- a polarization code corresponding to the actual first transmission rate is selected from the above M polarization codes, so that different polarization codes can be adaptively selected according to the actual first transmission rate.
- the selected polarization code corresponds to the actual first transmission rate, the actual first-time transmission rate and the target code rate of the polarization code are prevented from being excessively different, thereby avoiding the actual first transmission.
- the problem that the target transmission rate corresponding to the code rate and the polarization code is excessively large causes the first transmission performance to be impaired.
- FIG. 1 is a schematic diagram of an application scenario of a hybrid automatic retransmission method according to an embodiment of the present invention
- FIG. 2 is a schematic flowchart of a hybrid automatic retransmission scenario according to an embodiment of the present invention
- FIG. 3 is a schematic flowchart of a hybrid automatic retransmission method according to an embodiment of the present invention
- FIG. 4 is another schematic flowchart of a hybrid automatic retransmission method according to an embodiment of the present invention
- Block diagram of the hybrid automatic repeater
- FIG. 6 is another structural block diagram of a hybrid automatic repeater according to an embodiment of the present invention.
- FIG. 7 is a structural diagram of a general-purpose computer system of a wireless communication device according to an embodiment of the present invention
- FIG. 8 is another schematic structural diagram of a wireless communication device according to an embodiment of the present invention.
- the hybrid automatic retransmission method can be applied to a base station, a terminal, an AP (Access Point, a wireless node), a Wifi terminal, a relay station, etc. (but not limited to) a wireless communication device.
- AP Access Point, a wireless node
- Wifi terminal a Wifi terminal
- relay station etc. (but not limited to) a wireless communication device.
- information bit sequences can be encoded using polar codes as the mother code.
- FIG. 1 An application scenario of the hybrid automatic retransmission method described above is shown in Figure 1: Applied to base station 101 to communicate with any number of terminals similar to access terminal 102, access terminal 104.
- Access terminals 102 and 104 can be, for example, cellular telephones, smart phones, portable computers, handheld communication devices, handheld computing devices, satellite radios, global positioning systems, PDAs, and/or any other suitable device.
- Step 101 The sending end (base station) sends a certain data
- Step 102 The receiving end (terminal) decodes the received data, and if the decoding is correct, the ACK signal is fed back to the transmitting end, and if the decoding fails, the NACK signal is fed back to the transmitting end;
- Step 103 If the received signal is an ACK signal, the transmitting end continues to transmit the next data.
- Step 104 If the received signal is a NACK signal (and the maximum number of retransmissions is not reached), the transmitting end continues to transmit data according to the redundancy version.
- information bit sequences can be encoded using polar codes as mother codes.
- the actual first transmission (initial transmission) code rate may be different, so the number of bits punched in the first transmission is different.
- the actual Polar code the actual The corresponding channel at the time of initial transmission is also different.
- the polarization code as the mother code is designed for a non-punctured Polar code with a target code rate of 0.5.
- the actual transmission rate of the first transmission may be 0.5, 0.6, 0.8, etc., and HARQ is required by rate matching.
- the embodiment of the present invention provides a hybrid automatic retransmission mode (> 2 ) based on M polarization codes.
- the code rate and code length of the M polarization codes are given.
- the M polarization codes may each have a code rate of 0.5, and the code length may be 2048.
- FIG. 3 is a schematic flowchart of a hybrid automatic retransmission method according to an embodiment of the present invention. Based on the foregoing M polarization codes, the foregoing method may include the following steps:
- S1 Select a polarization code corresponding to the actual first transmission rate from the M polarization codes, and perform polarization code encoding on the information bit sequence to obtain the encoded bit.
- S2 Perform rate matching on the encoded bit to generate a bit to be transmitted.
- the conventional processing such as modulation may be performed later, and finally, and will not be described herein.
- M more than one polarization codes are preset.
- a polarization code corresponding to the actual first transmission rate is selected from the above M polarization codes, so that different polarization codes can be adaptively selected according to the actual first transmission rate.
- the selected polarization code corresponds to the actual first transmission rate, the actual first-time transmission rate and the target code rate of the polarization code are prevented from being excessively different, thereby avoiding the actual first transmission.
- the problem that the target transmission rate corresponding to the code rate and the polarization code is excessively large causes the first transmission performance to be impaired.
- the foregoing embodiment may further include the following steps:
- the to-be-sent bit that receives the hybrid automatic repeat request (that is, the NACK signal) and does not reach the maximum re-send, and transmits.
- the existing generation mode can be used, for example, the coded bits can be rate matched, and will not be described here.
- next data can continue to be transmitted.
- the polarization code used in step 1 can be directly used.
- the polarization code can also be reselected. Those skilled in the art can design according to the needs, and no further description is provided herein. .
- the M polarization codes in all of the above embodiments are designed for different target code rates.
- step S1 may specifically include:
- the polarization code includes olar codesl, polar codes2, polar codes3.
- the polar codesl-polar codes3 code rate is 0.5, but the olar codesl are designed for the target code rate of 0.5 (constructed), the olar codes2 are designed for the target bit rate of 0.6, and the polar codes2 are for the target code of 0.8. Rate design.
- polar codes3 When the actual first transmission rate is 0.75, among the above three polarization codes, polar codes3 The corresponding target bit rate is closest to 0.75, so that polar codes3 can be selected to encode the information bit sequence.
- the target code rate corresponding to polar codes1 is closest to 0.45, so that polar codesl can be selected to encode the information bit sequence.
- target bit rate may specifically refer to a target initial transmission (first transmission) code rate.
- the main parameters of the polarization code may include, where N represents the code length; represents the information bit length (or called the number); represents the information bit index set; is a frozen bit, and the number of frozen bits is a frozen bit is a known bit ; For simplicity, the freeze bit can be set to zero. Therefore, the main parameters of the polarization code can also be considered to include (N, , ).
- the information bit lengths of the M polarization codes are also the same (that is, the parameters are the same).
- the information bit index sets of the above M polarization codes are different but similar, that is, the above M polarization codes are different but similar.
- 4 represents the information bit index set of the i-th polarization code
- 4: 4 - represents the information bit index set of each of the other M-1 polarization codes.
- 4 denotes a set of elements that are removed by constructing 4 (the elements removed in 4), and SA X denotes a set of elements obtained by constructing 4 plus.
- SA X denotes a set of elements obtained by constructing 4 plus.
- a Polar code 1 information bit index set 4 can be generated using a conventional polarization code construction algorithm.
- M-1 polarization codes can be constructed for a number of typical initial transmitted target code rates. It is assumed that the mth polarization code (Polar code m) is designed for a target code rate of 0.8, and the corresponding information bit index set is A m . Table 1 below shows the set removed for the construction sau, and the following table 2 gives the set ⁇ added for the construction. It can be seen that ⁇ and set 4 have only 26 elements (also called bit index). Different, and 4 contain 1024 bit indexes respectively.
- the mth polarization code of the above M polarization codes can be generated as follows:
- the error probabilities of all the bit channels are sorted, and the bit index corresponding to the K bit channels with the smallest bit error probability is selected as the information bit set of the mth polarization code.
- the decoding of the Polar code can be decoded by SC (successive-cancellation). The process is as follows:
- yi N is the received signal vector (yl, y2, ..., yN), u; - 1 is the bit vector (ul, u2, ..., ui-l). W is the transition probability and L is the log likelihood ratio.
- ⁇ represents the decision value of bit ⁇ .
- the corresponding log likelihood ratio is initialized for each code symbol position in the Polar code, and the log likelihood ratio mean value of each code symbol position is obtained.
- puncturing means punching
- Nopuncturing means non-punching.
- the nodes are subjected to the calculation and update of the log likelihood ratio mean according to the same factor graph of the SC decoding.
- the formulas used include: , L (1 )
- Formula 2 is defined for 73 ⁇ 41 y , ⁇ : ten : 1 and t
- Equation 3 involves - '(x) , and ⁇ X) can be expressed as:
- the error probability of the i-th bit channel of the punctured Polar code is obtained.
- A represents the error probability of the i-th bit channel
- Q (*) represents the Q commonly used in communication.
- the Q function is defined as id y .
- FIG. 5 is a structural block diagram of a hybrid automatic repeater 500 according to an embodiment of the present invention, which may include at least:
- the coding unit 1 is configured to select a polarization code corresponding to an actual first transmission rate from a plurality of polarization codes having the same code length and code rate, and perform polarization coding on the information bit sequence to obtain an encoded code. Bit; the above ⁇ is greater than or equal to 2;
- the rate matching unit 2 is configured to perform rate matching on the encoded bit to generate a bit to be transmitted.
- the hybrid automatic repeater 500 described above may further include the following devices:
- the generating unit 3 is configured to generate an ith polarization code of the above one of the polarization codes; ⁇ i ⁇ M.
- the generating unit is specifically configured to calculate an error probability of transmitting each bit channel in the ith polarization code
- the error probabilities of all the bit channels are sorted, and the bit index corresponding to the K bit channels with the smallest error probability is selected as the information bit set of the i-th polarized code, and the above information indicates the bit length.
- the above selection coding unit 1 may be specifically configured to: select a polarization code whose target code rate is closest to the actual first transmission rate.
- FIG. 7 shows a general computer system structure of the wireless communication device 700 described above.
- the above computer system may include a bus, a processor 701, a memory 702, a communication interface 703, an input device 704, and an output device 705.
- the processor 701, the memory 702, the communication interface 703, the input device 704, and the output device 705 are connected to each other through a bus. among them:
- the bus can include a path for communicating information between various components of the computer system.
- the processor 701 may be a general-purpose processor, such as a general-purpose central processing unit (CPU), a network processor (NP), a microprocessor, etc., or may be an application-specific integrated circuit.
- a general-purpose processor such as a general-purpose central processing unit (CPU), a network processor (NP), a microprocessor, etc.
- CPU central processing unit
- NP network processor
- microprocessor microprocessor
- An application-specific integrated circuit or one or more integrated circuits for controlling the execution of the program of the present invention. It can also be a digital signal processor (DSP), an ASIC
- ASIC application-the-shelf programmable gate array
- FPGA field-programmable gate array
- a program for executing the technical solution of the present invention is stored in the memory 702, and an operating system and other applications can also be stored.
- the program can include program code, the program code including computer operating instructions.
- the memory 702 may be a read-only memory (ROM), other types of static storage devices that can store static information and instructions, a random access memory (RAM), and can store information and Other types of dynamic storage devices, disk storage, and so on.
- Input device 704 can include means for receiving data and information input by a user, such as a keyboard, mouse, camera, scanner, light pen, voice input device, touch screen, and the like.
- Output device 705 can include devices that allow output of information to the user, such as a display screen, printer, speaker, and the like.
- Communication interface 703 may include the use of devices such as any transceiver to communicate with other devices or communication networks, such as Ethernet, Radio Access Network (RAN), Wireless Local Area Network (WLAN), and the like.
- devices such as any transceiver to communicate with other devices or communication networks, such as Ethernet, Radio Access Network (RAN), Wireless Local Area Network (WLAN), and the like.
- RAN Radio Access Network
- WLAN Wireless Local Area Network
- the processor 701 executes the program stored in the memory 702, and can be used to implement the hybrid automatic retransmission method provided by the embodiment of the present invention, which may include the following steps:
- FIG. 8 shows another schematic structural diagram of the above wireless communication device 700.
- the wireless communication device 700 described above can include a receiver 802 for receiving signals from, for example, a receiving antenna (not shown) and performing typical actions (e.g., filtering, amplifying, downconverting, etc.) on the received signals, and The conditioned signal is digitized to obtain a sample.
- Receiver 802 can be, for example, an MMSE (Minimum Mean-Squared Error) receiver.
- Hybrid automatic repeater 800 can also include a demodulator 804 that can be used to demodulate the received signals and provide them to processor 806.
- Processor 806 can be a processor dedicated to analyzing information received by receiver 802 and/or generating information transmitted by transmitter 816, a processor for controlling one or more components of hybrid automatic repeater 800, and / or a controller for analyzing signals received by the receiver 802, generating information transmitted by the transmitter 816, and controlling one or more components of the hybrid automatic repeater 800.
- the wireless communication device 700 can additionally include a memory 808 operatively coupled to the processor 806 and storing the following data: data to be transmitted, received data, and any other related to performing various actions and functions described herein. Suitable for information.
- Memory 808 can additionally store associated protocols and/or algorithms for polarization code processing.
- non-volatile memory may include: ROM (Read-Only Memory), PROM (Programmable ROM), EPROM (Erasable PROM, Erasable Programmable) Read only memory), EEPROM (Electrically EEPROM) or flash memory.
- Volatile memory can include: RAM (Random Access Memory), which acts as an external cache.
- RAM Random Access Memory
- SRAM Static RAM, Static Random Access Memory
- DRAM Dynamic RAM
- SDRAM Synchronous DRAM
- Synchronous Dynamic Random Access Memory DDR SDRAM (Double Data Rate SDRAM)
- ESDRAM Enhanced SDRAM
- Strong Synchronous Dynamic Random Access Memory SLDRAM (Synchlink DRAM, Synchronous Connection Dynamic Random Access Memory) and DR RAM (Direct Rambus RAM).
- the memory 808 of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.
- the foregoing wireless communication apparatus 700 may further include: actually transmitting a polarization code corresponding to a code rate for the first time, and performing polarization code encoding on the information bit sequence to obtain an encoded bit; M is greater than or equal to 2;
- the rate matching device 810 is configured to perform rate matching on the encoded bit to generate a bit to be transmitted.
- receiver 802 can also be coupled to rate matching device 810.
- the olar code encoder 812 can also be used to generate M polarization codes.
- the above M polarization codes are also generated by other devices or newly added devices.
- the information bit index sets of the above M polarization codes are different but similar.
- 4 represents the information bit index set of the i-th polarization code
- 4:4 - represents the information bit index set of each of the other M-1 polarization codes.
- 4 denotes a set of elements that are removed by constructing 4 (the elements removed in 4), and SA X denotes a set of elements obtained by constructing 4 plus.
- SA X denotes a set of elements obtained by constructing 4 plus.
- the wireless communication device 700 described above can also include a modulator 814 and a transmitter 816 for transmitting signals to, for example, a base station, another terminal, and the like. Although shown separate from processor 806, it will be appreciated that polar code encoder 812, rate matching device 810, and/or modulator 814 can be part of processor 806 or a plurality of processors (not shown). Receiver 802 and transmitter 816 can also be integrated together in a practical application to form a transceiver.
- the wireless communication device 700 described above can transmit or receive data via a channel (e.g., the wireless communication device 700 can transmit and receive data simultaneously, the wireless communication device 700 can transmit and receive data at different times, or a combination thereof, etc.).
- the wireless communication device 700 can be, for example, a base station (e.g., base station 102 of FIG. 1), an access terminal (e.g., access terminal 116 of FIG. 1, access terminal 122 of FIG. 1, etc.), and the like.
- a base station e.g., base station 102 of FIG. 1
- an access terminal e.g., access terminal 116 of FIG. 1, access terminal 122 of FIG. 1, etc.
- the various embodiments in the present specification are described in a progressive manner, and each embodiment focuses on differences from other embodiments, and the same similar parts between the embodiments can be referred to each other.
- the description since it corresponds to the method provided by the embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method part. It should also be noted that, in this context, relational terms such as first and second, etc.
- the present invention can be implemented by means of software plus necessary general hardware including general-purpose integrated circuits, general-purpose CPUs, general-purpose memories, general-purpose components, and the like. , of course, can also be realized by dedicated hardware including ASIC, dedicated CPU, dedicated memory, dedicated components, etc., but in many cases The former is a better implementation.
- the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product, which may be stored in a readable storage medium, such as a USB disk.
- a computer device (which may be a personal computer, server, or network device, etc.) performs the methods of various embodiments of the present invention.
- a computer device which may be a personal computer, server, or network device, etc.) performs the methods of various embodiments of the present invention.
- the above description of the embodiments provided is to enable those skilled in the art to make or use the invention.
- Various modifications to these embodiments are obvious to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but the scope of the invention is to be accorded
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CN201480071656.0A CN105900365B (zh) | 2014-03-31 | 2014-03-31 | 极化码的混合自动重传方法及装置、无线通信装置 |
EP14888008.1A EP3119020B1 (en) | 2014-03-31 | 2014-03-31 | Polar code hybrid automatic repeat request method and device, and radio communication device |
CA2972922A CA2972922C (en) | 2014-03-31 | 2014-03-31 | Polar code hybrid automatic repeat request method and apparatus, and wireless communications apparatus |
RU2017126362A RU2669743C1 (ru) | 2014-03-31 | 2014-03-31 | Способ и устройство гибридного автоматического запроса на повторение с полярным кодом и беспроводное устройство связи |
PCT/CN2014/074398 WO2015149225A1 (zh) | 2014-03-31 | 2014-03-31 | 极化码的混合自动重传方法及装置、无线通信装置 |
US15/280,546 US9973302B2 (en) | 2014-03-31 | 2016-09-29 | Polar code hybrid automatic repeat request method and apparatus, and wireless communications apparatus |
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US15/280,546 Continuation US9973302B2 (en) | 2014-03-31 | 2016-09-29 | Polar code hybrid automatic repeat request method and apparatus, and wireless communications apparatus |
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Cited By (12)
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WO2017156792A1 (en) * | 2016-03-18 | 2017-09-21 | Qualcomm Incorporated | Transmission of new data in a hybrid automatic repeat request (harq) retransmission with polar coded transmissions |
WO2017215382A1 (zh) * | 2016-06-14 | 2017-12-21 | 华为技术有限公司 | 一种数据传输方法、装置和设备 |
WO2018031712A1 (en) * | 2016-08-10 | 2018-02-15 | Idac Holdings, Inc. | Advanced polar codes for next generation wireless communication systems |
WO2018149411A1 (zh) * | 2017-02-15 | 2018-08-23 | 中兴通讯股份有限公司 | 数据处理方法及装置 |
WO2018148963A1 (en) * | 2017-02-20 | 2018-08-23 | Qualcomm Incorporated | Polarization weight calculation for punctured polar code |
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US20170019214A1 (en) | 2017-01-19 |
CA2972922A1 (en) | 2015-10-08 |
US9973302B2 (en) | 2018-05-15 |
CA2972922C (en) | 2019-11-05 |
CN105900365B (zh) | 2019-09-20 |
CN105900365A (zh) | 2016-08-24 |
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