+

WO2019068264A1 - Nouvelles conceptions de livre-code pour supporter des scénarios ula et non ula - Google Patents

Nouvelles conceptions de livre-code pour supporter des scénarios ula et non ula Download PDF

Info

Publication number
WO2019068264A1
WO2019068264A1 PCT/CN2018/109344 CN2018109344W WO2019068264A1 WO 2019068264 A1 WO2019068264 A1 WO 2019068264A1 CN 2018109344 W CN2018109344 W CN 2018109344W WO 2019068264 A1 WO2019068264 A1 WO 2019068264A1
Authority
WO
WIPO (PCT)
Prior art keywords
codebook
permutation
processor
candidate precoder
selecting
Prior art date
Application number
PCT/CN2018/109344
Other languages
English (en)
Inventor
Weidong Yang
Original Assignee
Mediatek Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US16/149,004 external-priority patent/US20190103903A1/en
Application filed by Mediatek Inc. filed Critical Mediatek Inc.
Priority to CN201880004883.XA priority Critical patent/CN110063032A/zh
Publication of WO2019068264A1 publication Critical patent/WO2019068264A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H04B7/046—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting taking physical layer constraints into account
    • H04B7/0469—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting taking physical layer constraints into account taking special antenna structures, e.g. cross polarized antennas into account
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H04B7/0486—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting taking channel rank into account

Definitions

  • the present disclosure is generally related to wireless communications and, more particularly, to codebook-based uplink (UL) transmission in wireless communications.
  • UL uplink
  • the present disclosure proposes a number of solutions, schemes, methods and apparatus pertaining to codebook-based uplink transmission in wireless communications.
  • a codebook may be designed to be robust for diverse scenarios.
  • the codebook may cover a number of targeted codebooks which were optimized for specific antenna configurations and/or scenarios (e.g., Rel-8 DL 4Tx rank 2 codebook, rank 2 mutually unbiased bases (MUB) extension from Rel-10 UL 4Tx rank 1 codebook and Rel-15 DL NR 4Tx rank 2 codebook) . It is believed that the proposed solutions, schemes, methods and apparatus may reduce transmission overhead, improve system performance, and reduce power consumption by UEs.
  • MUB mutually unbiased bases
  • a method may involve a processor of a user equipment (UE) constructing a codebook comprising a plurality of precoders.
  • the method may also involve the processor processing information using the codebook.
  • the method may further involve the processor transmitting the processed information to a network node of a wireless network.
  • the method may involve the processor selecting a candidate precoder from a single-stage codebook or a dual-stage codebook and performing a permutation on the candidate precoder.
  • an apparatus may include a transceiver and a processor coupled to the transceiver.
  • the transceiver may be capable of wirelessly communicating with a network node of a wireless network.
  • the processor may be capable of: (a) constructing a codebook comprising a plurality of precoders; (b) processing information using the codebook; and (c) transmitting, via the transceiver, the processed information to a network node of a wireless network.
  • the processor may be capable of selecting a candidate precoder from a single-stage codebook or a dual-stage codebook and performing a permutation on the candidate precoder.
  • radio access technologies such as5G/NR mobile communications
  • 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 wherever applicable such as, for example and without limitation, LTE, LTE-Advanced, LTE-Advanced Pro, Internet-of-Things (IoT) and Narrow Band Internet of Things (NB-IoT) .
  • LTE Long Term Evolution
  • LTE-Advanced Long Term Evolution-Advanced
  • LTE-Advanced Pro Internet-of-Things
  • NB-IoT Narrow Band Internet of Things
  • FIG. 1 is a diagram of example scenarios in accordance with the present disclosure.
  • FIG. 2 is a diagram of an example scenario in accordance with the present disclosure.
  • FIG. 3 is a diagram of an example scenario in accordance with the present disclosure.
  • FIG. 4 is a diagram of an example scenario in accordance with the present disclosure.
  • FIG. 5 is a diagram of an example wireless communication environment in accordance with an implementation of the present disclosure.
  • FIG. 6 is a flowchart of an example process in accordance with an implementation of the present disclosure.
  • FIG. 7A, FIG. 7B, FIG. 7C and FIG. 7D shows example rank 1 codewords in accordance with an implementation of the present disclosure.
  • FIG. 8A, FIG. 8B, FIG. 8C, FIG. 8D, FIG. 8E, FIG. 8F, FIG. 8G and FIG. 8H shows example rank 2 codewords in accordance with an implementation of the present disclosure.
  • Implementations in accordance with the present disclosure relate to various techniques, methods, schemes and/or solutions pertaining to codebook-based uplink transmission in wireless communications.
  • 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.
  • a codebook may be constructed by selecting a candidate precoder from a single-stage codebook or a dual-stage codebook and then performing one or more permutations on the candidate precoder.
  • multiple permutations that cover a plurality of mutually unbiased bases (MUBs) , a plurality of codebooks specified in 3 rd -Generation Partnership Project (3GPP) specifications, or a combination thereof, may be utilized.
  • a dual-stage codebook structure may be adopted with the codebook having codewords from LTE Rel-10 UL four-transmitter (4Tx) codebook and NR Rel-15 DL 4Tx codebook.
  • the allowed range for each parameter can be restricted with codebook subset restriction (CSR) .
  • CSR codebook subset restriction
  • a CSR may be taken.
  • beam selection (i, j) may be limited to (1, 1) , (2, 2) .
  • (1, 2) and (2, 1) may not be allowed.
  • FIG. 7A, FIG. 7B, FIG. 7C and FIG. 7D shows example rank 1 codewords in accordance with an implementation of the present disclosure.
  • chordal distance between two precoders A and B is given by the norm of the matrix AA H -BB H , where the subscript H is for the Hermitian operator.
  • the phrase “chordal-distance equivalent” is used to refer to two codewords in an event that their chordal distance is 0.
  • a first codebook (codebook 1) may be deemed to “cover” a second codebook (codebook 2) in an event that, for any codeword in codebook 2, there is a chordal-distance equivalent codeword in codebook 1.
  • chordal-distance equivalent is used to refer to two codebooks in an event that, for any codeword in either of the two codebooks, there is a chordal-distance equivalent codeword in another codebook. In other words, they may cover each other.
  • Rel-8 DL 4Tx rank 2 codebook, the rank 2 MUB extension from Rel-10 UL 4Tx rank 1 codebook and the Rel-15 DL NR 4Tx rank 2 codebook are completely covered by the designed codebook in accordance with the present disclosure described herein.
  • FD-MIMO frequency division multiple-input-and-multiple-output
  • FIG. 1 illustrates example scenarios 100A and 100B in accordance with the present disclosure.
  • scenario 100A depicts an example ULA response, where a signal emitting from a signal source impinges a uniform linear array.
  • the signal model is formulated for receive as often used in array signal processing.
  • the signal model for transmit can be formulated similarly.
  • the phase difference among receivers x i , 1 ⁇ i ⁇ N, may be determined by the projections d i of antenna positions to the wave propagation direction.
  • the array response vector may be determined by the phase profile d 1 , d 2 , ...and d N :
  • the phase difference is also uniform.
  • DFT beams may be used to match the phase difference.
  • high-gain coherent transmissions and receptions may be achieved.
  • an irregular antenna placement may arise as shown in scenario 100B.
  • the differences between neighboring projections d i may be non-uniform, and it may be difficult to use any DFT beam to approximate P (d 1 , d 2 , ..., d N ) directly.
  • the phase profile may be better approximated by re-arranging d 1 , d 2 , ...and d N .
  • P (d N , d 1 , d 2 , ..., d N-1 ) well with a DFT beam while P (d 1 , d 2 , ..., d N ) is not well approximated by any DFT beam.
  • a premutation of the antenna ports in this case may be helpful.
  • phase rotation may be considered, as described below.
  • ⁇ k denotes a permutation matrix
  • r k, n 1, 1 ⁇ n ⁇ N specifies a phase rotation for antenna ports.
  • This consideration provides motivation to define a larger codebook by permuting the codewords from a first codebook in multiple ways. For any type of a first codebook, such a construction may be conducted.
  • a second and larger codebook may be constructed through where 1 ⁇ p 1 ⁇ P.
  • ⁇ k denotes a permutation matrix
  • the second codebook has P times as many codewords as the first codebook.
  • shuffling herein refers to the procedure of generating a second codebook from a first codebook, and the procedure includes permutation and/or phase rotation of antenna ports.
  • the criterion may be that the resulted larger (second) codebook includes as many entries as possible from the MUB design or Rel-8 DL codebook design, where the Rel-8 DL codebook is a robust codebook in terms of antenna spacing.
  • the resultant second and enlarged codebook covers all except four codebooks from Rel-8 DL 4Tx codebook.
  • the resultant second and enlarged codebook has 128 codewords.
  • the constructed codebook covers all codewords from Rel-15 4Tx DL codebook, Rel-8 4Tx codebook as well as Rel-10 UL 4Tx codebook.
  • the first codebook may be based on beam vector combination design, and the enlarged codebook may be based on the use of permutation matrices.
  • SRS resources 1, 2, 3 and 4 may be aggregated to be used together with a 4Tx codebook.
  • a single implicit mapping from those SRS resources to codebook antenna ports may be assumed. In view of the above, it may not be sufficient to assume a single order for SRS resources to provide good support to diverse antenna placement scenarios.
  • the network node e.g., gNB
  • the network node may indicate that SRS resources 1, 2, 3 and 4 are used for a signaled PMI.
  • the network node may signal that SRS resources 1, 2, 3 and 4 are mapped to ports 1, 2 3 and 4 (e.g., through the signaling of a list of SRS resource indicators (SRIs) or index to that list: (1, 2, 3, 4) ) .
  • SRIs SRS resource indicators
  • the network node may signal that SRS resources 1, 3, 2 and 4 are mapped to ports 1, 2, 3 and 4 (e.g., through the signaling of a list of SRIs or index to that list: (1, 3, 2, 4) ) .
  • FIG. 2 illustrates an example scenario 200 of port permutation (1234) indication from SRI signaling.
  • FIG. 3 illustrates an example scenario 300 of port permutation (1324) indication from SRI signaling.
  • the network node e.g., gNB
  • the network node may indicate that SRS resources 1, 2, 3 and 4 are used for the signaled PMI.
  • the network node may signal the permutation of SRS resources (e.g., (1, 2, 3, 4) or (1, 3, 2, 4) to the UE) , and the PMI may be for the first codebook.
  • the permutation may be integrated in the PMI definition, and the PMI may be for the second codebook.
  • FIG. 4 illustrates an example scenario 400 of port permutation as an integral part of the codebook definition.
  • the network node e.g., gNB
  • the network node may indicate an SRS resource with ports 1, 2, 3 and 4 for a signaled PMI.
  • the network node may signal the permutation of SRS ports (e.g., (1, 2, 3, 4) or (1, 3, 2, 4) to the UE) , and the PMI may be for the first codebook.
  • the permutation of SRS ports may be integrated in the PMI definition, and the PMI may be for the second codebook.
  • the permutation of SRS resources/SRS ports may be indicated through radio resource control (RRC) signaling or media access control (MAC) control element (CE) .
  • RRC radio resource control
  • MAC media access control
  • CE media access control
  • Such indication may be provided along with other precoding matrix indicator (PMI) parameters such as those for W 1 .
  • PMI precoding matrix indicator
  • a beam group may be determined by k and the permutation matrix index p 1 .
  • the permutation matrix index may be determined in a long-term basis (e.g., through RRC signaling and/or MAC CE as part of CSR or independent of CSR) , so the feedback overhead of the enlarged codebook remain unchanged compared to the original codebook (e.g., NR DL 4Tx codebook) .
  • the original codebook e.g., NR DL 4Tx codebook
  • the Rel-8 rank 2 4Tx codebook and Rel-15 NR rank 2 4Tx codebook are covered by the proposed design.
  • permutation matrices may be identified.
  • using permutation matrices to an existing or a first codebook to obtain an enlarged codebook may be treated as a generic way to handle irregular antenna configurations.
  • a number of permutation matrices may be used to obtain an enlarged codebook, with for illustrative purposes and without limiting scope of the present disclosure, three example constructions (Construction A, Construction B and Construction C) are provided below.
  • permutation (1423)
  • orthogonal beam groups are used to construct codewords for ranks higher than rank 1.
  • the same beam vector is used for both polarizations subject to possible phase adjustment.
  • different beam vectors may be used for different polarizations for each layer.
  • chordal-distance equivalent codewords are unnecessary and for as they generate chordal-distance equivalent codewords and either one is sufficient. Additionally, it is unnecessary to include both and for as they generate chordal-distance equivalent codewords. They may also be included for generation of a uniform formulation of as follows:
  • FIG. 8A, FIG. 8B, FIG. 8C, FIG. 8D, FIG. 8E, FIG. 8F, FIG. 8G and FIG. 8H shows example rank 2 codewords with Alt 2 of Construction Bin accordance with an implementation of the present disclosure.
  • FIG. 5 illustrates an example wireless communication environment 500 in accordance with an implementation of the present disclosure.
  • Wireless communication environment 500 may involve a communication apparatus 510 and a network apparatus 520 in wireless communication with each other.
  • Each of communication apparatus 510 and network apparatus 520 may perform various functions to implement procedures, schemes, techniques, processes and methods described herein pertaining to codebook-based uplink transmission in wireless communications, including the various procedures, scenarios, schemes, solutions, concepts and techniques described above as well as process 600 described below.
  • Communication apparatus 510 may be a part of an electronic apparatus, which may be a UE such as a portable or mobile apparatus, a wearable apparatus, a wireless communication apparatus or a computing apparatus.
  • communication apparatus 510 may be implemented in a smartphone, a smartwatch, a personal digital assistant, a digital camera, or a computing equipment such as a tablet computer, a laptop computer or a notebook computer.
  • communication apparatus 510 may also be a part of a machine type apparatus, which may be an IoT or NB-IoT apparatus such as an immobile or a stationary apparatus, a home apparatus, a wire communication apparatus or a computing apparatus.
  • communication apparatus 510 may be implemented in a smart thermostat, a smart fridge, a smart door lock, a wireless speaker or a home control center.
  • communication apparatus 510 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.
  • IC integrated-circuit
  • Communication apparatus 510 may include at least some of those components shown in FIG. 5 such as a processor 512, for example.
  • Communication apparatus 510 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 communication apparatus 510 are neither shown in FIG. 5 nor described below in the interest of simplicity and brevity.
  • Network apparatus 520 may be a part of an electronic apparatus, which may be a network node such as a TRP, a base station, a small cell, a router or a gateway.
  • network apparatus 520 may be implemented in an eNodeB in an LTE, LTE-Advanced or LTE- Advanced Pro network or in a gNB in a 5G, NR, IoT or NB-IoT network.
  • network apparatus 520 may be implemented in the form of one or more IC chips such as, for example and without limitation, one or more single-core processors, one or more multi-core processors, one or more RISC processors, or one or more CISC processors.
  • Network apparatus 520 may include at least some of those components shown in FIG. 5 such as a processor 522, for example.
  • Network apparatus 520 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 network apparatus 520 are neither shown in FIG. 5 nor described below in the interest of simplicity and brevity.
  • each of processor 512 and processor 522 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 “a processor” is used herein to refer to processor 512 and processor 522, each of processor 512 and processor 522 may include multiple processors in some implementations and a single processor in other implementations in accordance with the present disclosure.
  • each of processor 512 and processor 522 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.
  • each of processor 512 and processor 522 is a special-purpose machine specifically designed, arranged and configured to perform specific tasks pertaining to codebook-based uplink transmission in wireless communications in accordance with various implementations of the present disclosure.
  • communication apparatus 510 may also include a transceiver 516 coupled to processor 512 and capable of wirelessly transmitting and receiving data, signals and information.
  • transceiver 516 may be equipped with a plurality of antenna ports (not shown) such as, for example, four antenna ports.
  • communication apparatus 510 may further include a memory 514 coupled to processor 512 and capable of being accessed by processor 512 and storing data therein.
  • network apparatus 520 may also include a transceiver 526 coupled to processor 522 and capable of wirelessly transmitting and receiving data, signals and information.
  • network apparatus 520 may further include a memory 524 coupled to processor 522 and capable of being accessed by processor 522 and storing data therein. Accordingly, communication apparatus 510 and network apparatus 520 may wirelessly communicate with each other via transceiver 516 and transceiver 526, respectively.
  • each of communication apparatus 510 and network apparatus 520 is provided in the context of a mobile communication environment in which communication apparatus 510 is implemented in or as a communication apparatus or a UE and network apparatus 520 is implemented in or as a network node (e.g., gNB or TRP) of a wireless network (e.g., 5G/NR mobile network) .
  • a network node e.g., gNB or TRP
  • a wireless network e.g., 5G/NR mobile network
  • processor 512 of communication apparatus 510 may construct a codebook that includes a plurality of precoders. Additionally, processor 512 may process information using the codebook. Moreover, processor 512 may transmit, via transceiver 516, the processed information to network apparatus 520. In some implementations, in constructing the codebook, processor 512 may select a candidate precoder from a single-stage codebook or a dual-stage codebook. Furthermore, processor 512 may perform a permutation on the candidate precoder.
  • processor 512 may perform a plurality of permutations on the candidate precoder to construct the codebook.
  • the plurality of permutations may cover a plurality of mutually unbiased bases, a plurality of codebooks specified in 3GPP specifications, or a combination thereof.
  • processor 512 may perform numerous operations. For instance, processor 512 may select an original codebook from a plurality of codebooks specified in 3GPP specifications. Additionally, processor 512 may enlarge the original codebook by performing one or more permutations on the original codebook with one or more permutation matrices to obtain the codebook. In some implementations, a feedback overhead of the codebook may remain unchanged compared to a feedback overhead of the original codebook.
  • processor 512 may perform numerous operations. For instance, processor 512 may select a permutation matrix from a plurality of permutation matrices. Moreover, processor 512 may apply the permutation matrix to the candidate precoder to enlarge the candidate precoder.
  • processor 512 may dynamically or semi-statically receive, via transceiver 516, signaling from network apparatus 520 indicating selection of the permutation matrix for constructing the codebook. In some implementations, in receiving the signaling, processor 512 may receive RRC signaling or an MAC CE as part of codebook subset restriction (CSR) or independent of the CSR.
  • CSR codebook subset restriction
  • each of the plurality of permutation matrices may correspond to respective one or more antenna placement scenarios or one or more codewords.
  • the candidate precoder may include a rank 2 precoder.
  • the codebook may include a rank 1 codebook with a structure of:
  • ⁇ n takes a value from 1, j, -1, -j,
  • e i is a L ⁇ 1 vector with 1 at element i and zero elsewhere, and
  • processor 512 may select an NR DL 4Tx codebook. In some implementations, in performing the permutation on the candidate precoder, processor 512 may apply to the NR DL 4Tx codebook a plurality of permutation matrices comprising:
  • the codebook may include a rank 2 codebook with a structure of:
  • Alt 1 a first alternative
  • Alt 2 a second alternative
  • the codebook may include a rank 2 codebook with a structure of:
  • FIG. 6 illustrates an example process 600 in accordance with an implementation of the present disclosure.
  • Process 600 may be an example implementation of the various procedures, scenarios, schemes, solutions, concepts and techniques, or a combination thereof, whether partially or completely, with respect to codebook-based uplink transmission in wireless communications in accordance with the present disclosure.
  • Process 600 may represent an aspect of implementation of features of communication apparatus 510.
  • Process 600 may include one or more operations, actions, or functions as illustrated by one or more of blocks 610, 620 and 630 as well as sub-blocks 612 and 614. Although illustrated as discrete blocks, various blocks of process 600 may be divided into additional blocks, combined into fewer blocks, or eliminated, depending on the desired implementation. Moreover, the blocks of process 600 may executed in the order shown in FIG.
  • Process 600 may be implemented by communication apparatus 510 or any suitable UE or machine type devices. Solely for illustrative purposes and without limitation, process 600 is described below in the context of communication apparatus 510 as a UE and network apparatus 520 as a network node (e.g., gNB) of a wireless network. Process 600 may begin at block 610.
  • a network node e.g., gNB
  • process 600 may involve processor 512 ofcommunication apparatus 510constructing a codebook that includes a plurality of precoders. Process 600 may proceed from 610 to 620.
  • process 600 may involve processor 512 processing information using the codebook. Process 600 may proceed from 620 to 630.
  • process 600 may involve processor 512transmitting, via transceiver 516, the processed information to network apparatus 520.
  • process 600 may involve processor 512 performing a number of operations as represented by sub-blocks 612 and 614.
  • process 600 may involve processor 512 selecting a candidate precoder from a single-stage codebook or a dual-stage codebook. Process 600 may proceed from 612 to 614.
  • process 600 may involve processor 512 performing a permutation on the candidate precoder.
  • process 600 may involve processor 512 performing a plurality of permutations on the candidate precoder to construct the codebook.
  • the plurality of permutations may cover a plurality of mutually unbiased bases, a plurality of codebooks specified in 3GPP specifications, or a combination thereof.
  • process 600 may involve processor 512 performing numerous operations. For instance, process 600 may involve processor 512 selecting an original codebook from a plurality of codebooks specified in 3GPP specifications. Additionally, process 600 may involve processor 512 enlarging the original codebook by performing one or more permutations on the original codebook with one or more permutation matrices to obtain the codebook. In some implementations, a feedback overhead of the codebook may remain unchanged compared to a feedback overhead of the original codebook.
  • process 600 may involve processor 512 performing numerous operations. For instance, process 600 may involve processor 512 selecting a permutation matrix from a plurality of permutation matrices. Moreover, process 600 may involve processor 512 applying the permutation matrix to the candidate precoder to enlarge the candidate precoder.
  • process 600 may involve processor 512 dynamically or semi-statically receiving, via transceiver 516, signaling from network apparatus 520 indicating selection of the permutation matrix for constructing the codebook.
  • process 600 in receiving the signaling, may involve processor 512 receiving RRC signaling or an MAC CE as part of codebook subset restriction (CSR) or independent of the CSR.
  • CSR codebook subset restriction
  • each of the plurality of permutation matrices may correspond to respective one or more antenna placement scenarios or one or more codewords.
  • the candidate precoder may include a rank 2 precoder.
  • the codebook may include a rank 1 codebook with a structure of:
  • ⁇ n takes a value from 1, j, -1, -j,
  • e i is a L ⁇ 1 vector with 1 at element i and zero elsewhere, and
  • process 600 may involve processor 512 selecting an NR DL 4Tx codebook. In some implementations, in performing the permutation on the candidate precoder, process 600 may involve processor 512 applying to the NR DL 4Tx codebook a plurality of permutation matrices comprising:
  • the codebook may include a rank 2 codebook with a structure of:
  • Alt 1 a first alternative
  • Alt 2 a second alternative
  • the codebook may include a rank 2 codebook with a structure of:
  • 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.
  • 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne diverses solutions se rapportant à une transmission de liaison montante basée sur un livre-code dans des communications sans fil. Un équipement d'utilisateur (UE) génère un livre-code comprenant une pluralité de précodeurs. L'UE traite des informations à l'aide du livre-code, et transmet les informations traitées à un nœud de réseau d'un réseau sans fil. Lors de la génération du livre-code, l'UE sélectionne un précodeur candidat à partir d'un livre-code à un seul étage ou d'un livre-code à deux étages, et exécute une permutation sur le précodeur candidat.
PCT/CN2018/109344 2017-10-02 2018-10-08 Nouvelles conceptions de livre-code pour supporter des scénarios ula et non ula WO2019068264A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201880004883.XA CN110063032A (zh) 2017-10-02 2018-10-08 支持ula和非ula场景的新码本设计

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US201762566793P 2017-10-02 2017-10-02
US62/566,793 2017-10-02
US16/149,004 2018-10-01
US16/149,004 US20190103903A1 (en) 2017-10-02 2018-10-01 Codebook Designs To Support ULA And Non-ULA Scenarios

Publications (1)

Publication Number Publication Date
WO2019068264A1 true WO2019068264A1 (fr) 2019-04-11

Family

ID=65994280

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/109344 WO2019068264A1 (fr) 2017-10-02 2018-10-08 Nouvelles conceptions de livre-code pour supporter des scénarios ula et non ula

Country Status (3)

Country Link
CN (1) CN110063032A (fr)
TW (1) TW201924245A (fr)
WO (1) WO2019068264A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024077431A1 (fr) * 2022-10-10 2024-04-18 Qualcomm Incorporated Adaptation de livre de codes ul pour pusch

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100284484A1 (en) * 2008-01-14 2010-11-11 Telefonaktiebolaget L M Ericsson (Publ) Open loop precoder cycling in mimo communications
WO2012035425A1 (fr) * 2010-09-16 2012-03-22 Alcatel Lucent Procédé destiné à déterminer une matrice de précodage, procédés et dispositifs de communication correspondants
US20140003395A1 (en) * 2012-07-02 2014-01-02 Industrial Technology Research Institute Method and apparatus for bit-adaptive precoding matrix indicator feedback
WO2015135596A1 (fr) * 2014-03-14 2015-09-17 Telefonaktiebolaget L M Ericsson (Publ) Technique de détermination de précodeur

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100956935B1 (ko) * 2008-06-30 2010-05-11 주식회사 케이티 체계적 일정진폭 프리코딩 장치 및 그 방법과, 그에 따른디코딩 장치 및 그 방법
US8750270B2 (en) * 2010-02-25 2014-06-10 Lg Electronics Inc. Method and apparatus for transmitting feedback request and method and apparatus for receiving feedback request in wireless communication system
US8897382B2 (en) * 2010-08-16 2014-11-25 Telefonaktiebolaget L M Ericsson (Publ) Method for determining precoding weights
US9281881B2 (en) * 2013-02-12 2016-03-08 Texas Instruments Incorporated 4TX codebook enhancement in LTE
US9680535B2 (en) * 2015-01-16 2017-06-13 Samsung Electronics Co., Ltd. Method and apparatus for reduced feedback FD-MIMO
CN104935366B (zh) * 2015-04-21 2018-01-02 北京航空航天大学 毫米波通信中的波束搜索方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100284484A1 (en) * 2008-01-14 2010-11-11 Telefonaktiebolaget L M Ericsson (Publ) Open loop precoder cycling in mimo communications
WO2012035425A1 (fr) * 2010-09-16 2012-03-22 Alcatel Lucent Procédé destiné à déterminer une matrice de précodage, procédés et dispositifs de communication correspondants
US20140003395A1 (en) * 2012-07-02 2014-01-02 Industrial Technology Research Institute Method and apparatus for bit-adaptive precoding matrix indicator feedback
WO2015135596A1 (fr) * 2014-03-14 2015-09-17 Telefonaktiebolaget L M Ericsson (Publ) Technique de détermination de précodeur

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
MEDIATEK INC. ET AL.: "Codebook based transmission for UL", 3GPP TSG RAN WGI MEETING NR#3 R1-1716209, 21 September 2017 (2017-09-21), XP051329831 *

Also Published As

Publication number Publication date
CN110063032A (zh) 2019-07-26
TW201924245A (zh) 2019-06-16

Similar Documents

Publication Publication Date Title
US20190103903A1 (en) Codebook Designs To Support ULA And Non-ULA Scenarios
CN110036570B (zh) 基于码本的上行链路传输方法及用户设备
US10567051B2 (en) Codebook-based uplink transmission in wireless communications
US10707939B2 (en) Codebook-based uplink transmission in wireless communications
US11804885B2 (en) Codebook subset restriction for full-dimension MIMO
WO2019096071A1 (fr) Procédé et appareil de communication, et système
US9391681B2 (en) Method for determining precoding matrix indicator, user equipment, and base station
US10594374B2 (en) Codebook-based uplink transmission in wireless communications
CN112075034B (zh) 高级无线通信系统的预编码
CN110100407B (zh) 无线通信中基于码本的上行链路传输方法
WO2019057094A1 (fr) Transmission de liaison montante basée sur un livre-code dans des communications sans fil
US10469142B2 (en) Advanced CSI reporting for hybrid class A/B operation
WO2019196768A1 (fr) Procédé de communication, et appareil de communication
KR20180129875A (ko) 업링크 mimo를 가능하게 하기 위한 방법 및 장치
EP3332488A1 (fr) Procédé et appareil de rétroaction à court terme dans des communications à entrées multiples et sorties multiples
US10523290B2 (en) Codebook-based uplink transmission in wireless communications
WO2019068264A1 (fr) Nouvelles conceptions de livre-code pour supporter des scénarios ula et non ula
WO2022267972A1 (fr) Précodage mimo à haute résolution spatiale pour communication de liaison montante

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18864287

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18864287

Country of ref document: EP

Kind code of ref document: A1

点击 这是indexloc提供的php浏览器服务，不要输入任何密码和下载