WO2017069580A1 - Livre de codes de pré-codeur pour des systèmes de communication sans fil évolués - Google Patents

Livre de codes de pré-codeur pour des systèmes de communication sans fil évolués Download PDF

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Publication number
WO2017069580A1
WO2017069580A1 PCT/KR2016/011926 KR2016011926W WO2017069580A1 WO 2017069580 A1 WO2017069580 A1 WO 2017069580A1 KR 2016011926 W KR2016011926 W KR 2016011926W WO 2017069580 A1 WO2017069580 A1 WO 2017069580A1
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WIPO (PCT)
Prior art keywords
codebook
precoder
rank
dimension
configuration
Prior art date
Application number
PCT/KR2016/011926
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English (en)
Other versions
WO2017069580A9 (fr
Inventor
Md. Saifur RAHMAN
Young-Han Nam
Original Assignee
Samsung Electronics Co., Ltd.
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 US15/246,502 external-priority patent/US10439690B2/en
Application filed by Samsung Electronics Co., Ltd. filed Critical Samsung Electronics Co., Ltd.
Priority to CN201680061960.6A priority Critical patent/CN108604915B/zh
Priority to EP16857837.5A priority patent/EP3365982A4/fr
Publication of WO2017069580A1 publication Critical patent/WO2017069580A1/fr
Publication of WO2017069580A9 publication Critical patent/WO2017069580A9/fr

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    • 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
    • H04B7/0478—Special codebook structures directed to feedback optimisation
    • 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
    • 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
    • H04B7/0478—Special codebook structures directed to feedback optimisation
    • H04B7/0479—Special codebook structures directed to feedback optimisation for multi-dimensional arrays, e.g. horizontal or vertical pre-distortion matrix index [PMI]
    • 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
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station

Definitions

  • the present application relates generally to codebook design and codebook structure for advanced wireless communication systems. More specifically, this disclosure relates to an efficient precoder codebook for advanced wireless communication systems.
  • the 5G or pre-5G communication system is also called a 'Beyond 4G Network' or a 'Post LTE System'.
  • the 5G communication system is considered to be implemented in higher frequency (mmWave) bands, e.g., 60GHz bands, so as to accomplish higher data rates.
  • mmWave e.g., 60GHz bands
  • MIMO massive multiple-input multiple-output
  • FD-MIMO Full Dimensional MIMO
  • array antenna an analog beam forming, large scale antenna techniques are discussed in 5G communication systems.
  • RANs Cloud Radio Access Networks
  • D2D device-to-device
  • wireless backhaul moving network
  • cooperative communication Coordinated Multi-Points (CoMP), reception-end interference cancellation and the like.
  • CoMP Coordinated Multi-Points
  • FQAM Hybrid Frequency Shift Keying and Quadrature Amplitude Modulation
  • SWSC sliding window superposition coding
  • ACM advanced coding modulation
  • FBMC filter bank multi carrier
  • NOMA non-orthogonal multiple access
  • SCMA sparse code multiple access
  • the UE will feedback information about channel measurement, e.g., channel state information (CSI), to the eNB.
  • CSI channel state information
  • the eNB is able to select appropriate communication parameters to efficiently and effectively perform wireless data communication with the UE.
  • This additionally-desired channel feedback may create additional overheads, thus reducing the efficiency of the wireless communication, for example, decrease the data rate.
  • the efficient feedback scheme is required.
  • Embodiments of the present disclosure provide a precoder codebook for advanced wireless communication systems.
  • an apparatus of a user equipment includes a transceiver configured to receive, from an eNodeB (eNB), downlink signals for indicating parameters of a precoder codebook that include a first number of antenna ports (N 1 ) for a first dimension, a second number of antenna ports (N 2 ) for a second dimension, and a codebook configuration.
  • the UE further includes at least one processor configured to determine a precoder by swapping a first index associated with the first dimension and a second index associated with the second dimension, determined based on the N 1 and N 2 , wherein the transceiver is further configured to transmit, to the eNB, channel state information (CSI) including information for indicating the precoder.
  • CSI channel state information
  • an apparatus of an eNodeB includes a transceiver configured to transmit downlink signals, to a user equipment (UE), indicating parameters of a precoder codebook that include a first number of antenna ports (N 1 ) for a first dimension, a second number of antenna ports (N 2 ) for a second dimension, and a codebook configuration, and receive, from the UE, channel state information (CSI) including information for indicating a precoder.
  • the apparatus further includes at least one processor configured to determine the precoder by swapping a first index associated with the first dimension and a second index associated with the second dimension determined based on the N 1 and N 2 based on the received channel state information.
  • a method for operating user equipment (UE) in an advanced wireless communication network comprises receiving, from an eNodeB (eNB), downlink signals for indicating parameters for a precoder codebook that include a first number of antenna ports (N 1 ) for a first dimension, a second number of antenna ports (N 2 ) for a second dimension, and a codebook configuration, determining a precoder by swapping a first index associated with the first dimension and a second index associated with the second dimension based on the N 1 and N 2 , and transmitting, to the eNB, channel state information (CSI) including information for indicating the precoder.
  • CSI channel state information
  • a method for operating an eNodeB (eNB) in an advanced wireless communication network comprises transmiting downlink signals, to a user equipment (UE), indicating parameters of a precoder codebook that include a first number of antenna ports (N 1 ) for a first dimension, a second number of antenna ports (N 2 ) for a second dimension, and a codebook configuration; receiving, from the UE, channel state information (CSI) including information for indicating a precoder, and determining the precoder by swapping a first index associated with the first dimension and a second index associated with the second dimension determined based on the N 1 and N 2 based on the received channel state information.
  • CSI channel state information
  • FIGURE 1 illustrates an example wireless network according to embodiments of the present disclosure
  • FIGURE 2 illustrates an example eNB according to embodiments of the present disclosure
  • FIGURE 3 illustrates an example UE according to embodiments of the present disclosure
  • FIGURE 4A illustrates a high-level diagram of an orthogonal frequency division multiple access transmit path according to embodiments of the present disclosure
  • FIGURE 4B illustrates a high-level diagram of an orthogonal frequency division multiple access receive path according to embodiments of the present disclosure
  • FIGURE 5 illustrates an example structure for a downlink (DL) subframe according to embodiments of the present disclosure
  • FIGURE 6 illustrates an example antenna configurations and numbering according to embodiments of the present disclosure
  • FIGURE 7 illustrates an example precoding weight application to antenna configurations according to embodiments of the present disclosure
  • FIGURE 8 illustrates an example antenna element (or transmit resource unit (TXRU)) numbering according to embodiments of the present disclosure
  • FIGURE 9 illustrates an example rank 3-4 orthogonal beam pair construction according to embodiments of the present disclosure
  • FIGURE 10 illustrates an example orthogonal beams for rank 3-4 according to embodiments of the present disclosure
  • FIGURE 11 illustrates an example orthogonal beam grouping for rank 5-8 according to embodiments of the present disclosure
  • FIGURE 12 illustrates another example orthogonal beam grouping for rank 5-8 according to embodiments of the present disclosure
  • FIGURE 13 illustrates yet another example orthogonal beam grouping for rank 5-8 according to embodiments of the present disclosure
  • FIGURE 14 illustrates yet another example orthogonal beam grouping for rank 5-8 according to embodiments of the present disclosure.
  • FIGURE 15 illustrates yet another example orthogonal beam grouping for rank 5-8 according to embodiments of the present disclosure.
  • Couple and its derivatives refer to any direct or indirect communication between two or more elements, whether or not those elements are in physical contact with one another.
  • transmit and “communicate,” as well as derivatives thereof, encompass both direct and indirect communication.
  • the term “or” is inclusive, meaning and/or.
  • controller means any device, system or part thereof that controls at least one operation. Such a controller may be implemented in hardware or a combination of hardware and software and/or firmware. The functionality associated with any particular controller may be centralized or distributed, whether locally or remotely.
  • phrases "at least one of,” when used with a list of items, means that different combinations of one or more of the listed items may be used, and only one item in the list may be needed.
  • “at least one of: A, B, and C” includes any of the following combinations: A, B, C, A and B, A and C, B and C, and A and B and C.
  • various functions described below can be implemented or supported by one or more computer programs, each of which is formed from computer readable program code and embodied in a computer readable medium.
  • application and “program” refer to one or more computer programs, software components, sets of instructions, procedures, functions, objects, classes, instances, related data, or a portion thereof adapted for implementation in a suitable computer readable program code.
  • computer readable program code includes any type of computer code, including source code, object code, and executable code.
  • computer readable medium includes any type of medium capable of being accessed by a computer, such as read only memory (ROM), random access memory (RAM), a hard disk drive, a compact disc (CD), a digital video disc (DVD), or any other type of memory.
  • ROM read only memory
  • RAM random access memory
  • CD compact disc
  • DVD digital video disc
  • a "non-transitory” computer readable medium excludes wired, wireless, optical, or other communication links that transport transitory electrical or other signals.
  • a non-transitory computer readable medium includes media where data can be permanently stored and media where data can be stored and later overwritten, such as a rewritable optical disc or an erasable memory device.
  • FIGURES 1 through FIGURE 15, discussed below, and the various embodiments used to describe the principles of the present disclosure in this patent document are by way of illustration only and should not be construed in any way to limit the scope of the disclosure. Those skilled in the art will understand that the principles of the present disclosure may be implemented in any suitably arranged system or device.
  • FIGURES 1-4B below describe various embodiments implemented in wireless communications systems and with the use of OFDM or OFDMA communication techniques.
  • the descriptions of FIGURES 1-3 are not meant to imply physical or architectural limitations to the manner in which different embodiments may be implemented. Different embodiments of the present disclosure may be implemented in any suitably-arranged communications system.
  • FIGURE 1 illustrates an example wireless network 100 according to embodiments of the present disclosure.
  • the embodiment of the wireless network 100 shown in FIGURE 1 is for illustration only. Other embodiments of the wireless network 100 could be used without departing from the scope of this disclosure.
  • the wireless network 100 includes an eNB 101, an eNB 102, and an eNB 103.
  • the eNB 101 communicates with the eNB 102 and the eNB 103.
  • the eNB 101 also communicates with at least one network 130, such as the Internet, a proprietary Internet Protocol (IP) network, or other data network.
  • IP Internet Protocol
  • the eNB 102 provides wireless broadband access to the network 130 for a first plurality of user equipments (UEs) within a coverage area 120 of the eNB 102.
  • the first plurality of UEs includes a UE 111, which may be located in a small business (SB); a UE 112, which may be located in an enterprise (E); a UE 113, which may be located in a WiFi hotspot (HS); a UE 114, which may be located in a first residence (R); a UE 115, which may be located in a second residence (R); and a UE 116, which may be a mobile device (M), such as a cell phone, a wireless laptop, a wireless PDA, or the like.
  • M mobile device
  • the eNB 103 provides wireless broadband access to the network 130 for a second plurality of UEs within a coverage area 125 of the eNB 103.
  • the second plurality of UEs includes the UE 115 and the UE 116.
  • one or more of the eNBs 101-103 may communicate with each other and with the UEs 111-116 using 5G, LTE, LTE-A, WiMAX, WiFi, or other wireless communication techniques.
  • eNodeB eNodeB
  • base station eNodeB
  • access point eNodeB
  • eNodeB and eNB are used in this patent document to refer to network infrastructure components that provide wireless access to remote terminals.
  • UE user equipment
  • mobile station such as a mobile telephone or smartphone
  • remote wireless equipment such as a wireless personal area network
  • stationary device such as a desktop computer or vending machine
  • Dotted lines show the approximate extents of the coverage areas 120 and 125, which are shown as approximately circular for the purposes of illustration and explanation only. It should be clearly understood that the coverage areas associated with eNBs, such as the coverage areas 120 and 125, may have other shapes, including irregular shapes, depending upon the configuration of the eNBs and variations in the radio environment associated with natural and man-made obstructions.
  • one or more of the UEs 111-116 include circuitry, programing, or a combination thereof, for precoder codebook processing.
  • one or more of the eNBs 101-103 includes circuitry, programing, or a combination thereof, for processing of channel state information (CSI) received from the UEs 111-116 in accordance with a first number of antenna ports (N 1 ) for a first dimension and a second number of antenna ports (N 2 ) for a second dimension.
  • CSI channel state information
  • FIGURE 1 illustrates one example of a wireless network 100
  • the wireless network 100 could include any number of eNBs and any number of UEs in any suitable arrangement.
  • the eNB 101 could communicate directly with any number of UEs and provide those UEs with wireless broadband access to the network 130.
  • each eNB 102-103 could communicate directly with the network 130 and provide UEs with direct wireless broadband access to the network 130.
  • the eNBs 101, 102, and/or 103 could provide access to other or additional external networks, such as external telephone networks or other types of data networks.
  • FIGURE 2 illustrates an example eNB 102 according to embodiments of the present disclosure.
  • the embodiment of the eNB 102 illustrated in FIGURE 2 is for illustration only, and the eNBs 101 and 103 of FIGURE 1 could have the same or similar configuration.
  • eNBs come in a wide variety of configurations, and FIGURE 2 does not limit the scope of this disclosure to any particular implementation of an eNB.
  • the eNB 102 includes multiple antennas 205a-205n, multiple RF transceivers 210a-210n, transmit (TX) processing circuitry 215, and receive (RX) processing circuitry 220.
  • the eNB 102 also includes a controller/processor 225, a memory 230, and a backhaul or network interface 235.
  • the RF transceivers 210a-210n receive, from the antennas 205a-205n, incoming RF signals, such as signals transmitted by UEs in the wireless network 100.
  • the RF transceivers 210a-210n down-convert the incoming RF signals to generate IF or baseband signals.
  • the IF or baseband signals are sent to the RX processing circuitry 220, which generates processed baseband signals by filtering, decoding, and/or digitizing the baseband or IF signals.
  • the RX processing circuitry 220 transmits the processed baseband signals to the controller/processor 225 for further processing.
  • the RF transceiver 210a-210n is also capable of transmitting downlink signals, to a user equipment (UE), including the single precoder codebook parameters, wherein a precoder matrix indicator (PMI) expression based on a codebook configuration in accordance with the single precoder codebook parameters is swapped at the UE.
  • the RF transceiver 210a-210n is also capable of receiving, from the UE, a reporting message including channel state information (CSI) based on the N 1 and N 2 .
  • CSI channel state information
  • the RF transceiver 210a-210n is also capable of transmitting downlink signals, to the UE, including the single precoder codebook parameters, wherein the PMI expression based on the codebook configuration in accordance with the precoder codebook parameter is parameterized based on a pair of parameters comprising (d 1 , d 2 ) in accordance with the N 1 and N 2 .
  • the TX processing circuitry 215 receives analog or digital data (such as voice data, web data, e-mail, or interactive video game data) from the controller/processor 225.
  • the TX processing circuitry 215 encodes, multiplexes, and/or digitizes the outgoing baseband data to generate processed baseband or IF signals.
  • the RF transceivers 210a-210n receive the outgoing processed baseband or IF signals from the TX processing circuitry 215 and up-converts the baseband or IF signals to RF signals that are transmitted via the antennas 205a-205n.
  • the controller/processor 225 can include one or more processors or other processing devices that control the overall operation of the eNB 102.
  • the controller/processor 225 could control the reception of forward channel signals and the transmission of reverse channel signals by the RF transceivers 210a-210n, the RX processing circuitry 220, and the TX processing circuitry 215 in accordance with well-known principles.
  • the controller/processor 225 could support additional functions as well, such as more advanced wireless communication functions.
  • the controller/processor 225 could support beam forming or directional routing operations in which outgoing signals from multiple antennas 205a-205n are weighted differently to effectively steer the outgoing signals in a desired direction.
  • the controller/processor 225 includes at least one microprocessor or microcontroller.
  • the eNB 102 may include circuitry, programing, or a combination thereof for processing of CSI received from the UE 111-116 in accordance with a first number of antenna ports (N 1 ) for a first dimension and a second number of antenna ports (N 2 ) for a second dimension.
  • controller/processor 225 can be configured to execute one or more instructions, stored in memory 230, that are configured to cause the controller/processor to process CSI received from the UE 111-116 in accordance with a first number of antenna ports (N 1 ) for a first dimension and a second number of antenna ports (N 2 ) for a second dimension.
  • the controller/processor 225 is also capable of executing programs and other processes resident in the memory 230, such as an OS.
  • the controller/processor 225 can move data into or out of the memory 230 as required by an executing process.
  • the controller/processor 225 is also coupled to the backhaul or network interface 235.
  • the backhaul or network interface 235 allows the eNB 102 to communicate with other devices or systems over a backhaul connection or over a network.
  • the interface 235 could support communications over any suitable wired or wireless connection(s). For example, when the eNB 102 is implemented as part of a cellular communication system (such as one supporting 5G, LTE, or LTE-A), the interface 235 could allow the eNB 102 to communicate with other eNBs over a wired or wireless backhaul connection.
  • the interface 235 could allow the eNB 102 to communicate over a wired or wireless local area network or over a wired or wireless connection to a larger network (such as the Internet).
  • the interface 235 includes any suitable structure supporting communications over a wired or wireless connection, such as an Ethernet or RF transceiver.
  • the memory 230 is coupled to the controller/processor 225. Part of the memory 230 could include a RAM, and another part of the memory 230 could include a Flash memory or other ROM.
  • FIGURE 2 illustrates one example of eNB 102
  • the eNB 102 could include any number of each component shown in FIGURE 2.
  • an access point could include a number of interfaces 235, and the controller/processor 225 could support routing functions to route data between different network addresses.
  • the eNB 102 while shown as including a single instance of TX processing circuitry 215 and a single instance of RX processing circuitry 220, the eNB 102 could include multiple instances of each (such as one per RF transceiver).
  • various components in FIGURE 2 could be combined, further subdivided, or omitted and additional components could be added according to particular needs.
  • FIGURE 3 illustrates an example UE 116 according to embodiments of the present disclosure.
  • the embodiment of the UE 116 illustrated in FIGURE 3 is for illustration only, and the UEs 111-115 of FIGURE 1 could have the same or similar configuration.
  • UEs come in a wide variety of configurations, and FIGURE 3 does not limit the scope of this disclosure to any particular implementation of a UE.
  • the UE 116 includes a plurality of antennas 305, a radio frequency (RF) transceiver 310, TX processing circuitry 315, a microphone 320, and receive (RX) processing circuitry 325.
  • the UE 116 also includes a speaker 330, a processor 340, an input/output (I/O) interface (IF) 345, a touchscreen 350, a display 355, and a memory 360.
  • the memory 360 includes an operating system (OS) 361 and one or more applications 362.
  • the RF transceiver 310 receives, from the plurality of antennas 305, an incoming RF signal transmitted by an eNB of the wireless network 100.
  • the RF transceiver 310 down-converts the incoming RF signal to generate an intermediate frequency (IF) or baseband signal.
  • the IF or baseband signal is sent to the RX processing circuitry 325, which generates a processed baseband signal by filtering, decoding, and/or digitizing the baseband or IF signal.
  • the RX processing circuitry 325 transmits the processed baseband signal to the speaker 330 (such as for voice data) or to the processor 340 for further processing (such as for web browsing data).
  • the RF transceiver 310 is also capable of receiving, from an eNodeB (eNB), downlink signals indicating precoder codebook parameters that comprise a first number of antenna ports (N 1 ) for a first dimension and a second number of antenna ports (N 2 ) for a second dimension
  • eNB eNodeB
  • downlink signals indicating precoder codebook parameters that comprise a first number of antenna ports (N 1 ) for a first dimension and a second number of antenna ports (N 2 ) for a second dimension
  • the TX processing circuitry 315 receives analog or digital voice data from the microphone 320 or other outgoing baseband data (such as web data, e-mail, or interactive video game data) from the processor 340.
  • the TX processing circuitry 315 encodes, multiplexes, and/or digitizes the outgoing baseband data to generate a processed baseband or IF signal.
  • the RF transceiver 310 receives the outgoing processed baseband or IF signal from the TX processing circuitry 315 and up-converts the baseband or IF signal to an RF signal that is transmitted via the plurality of antennas 305.
  • the processor 340 can include one or more processors or other processing devices and execute the OS 361 stored in the memory 360 in order to control the overall operation of the UE 116.
  • the processor 340 could control the reception of forward channel signals and the transmission of reverse channel signals by the RF transceiver 310, the RX processing circuitry 325, and the TX processing circuitry 315 in accordance with well-known principles.
  • the processor 340 includes at least one microprocessor or microcontroller.
  • the UE reports Channel State Information (CSI) to the eNB.
  • the CSI indicates information associated with a quality of a wireless link or a wireless channel formed between the UE and the base station.
  • the CSI may comprise a rank indicator (RI), a precoding matrix indicator (PMI), a channel quality indicator (CQI).
  • the RI indicates information associated with a rank for channel, and represents the number of streams received by the UE through a resource.
  • the PMI is a value reflected spatial characteristic for the channel, and indicates an index of precoder that the UE prefers.
  • the CQI is a value indicating a strength of the channel.
  • the CQI may be represent Signal-to-Interference plus Noise Ratio (SINR) of received signals when the eNB uses the PMI.
  • SINR Signal-to-Interference plus Noise Ratio
  • the processor 340 is also capable of executing other processes and programs resident in the memory 360, such as processes for identifying a codebook configuration based on a single precoder codebook in accordance with the N 1 and N 2 and swapping precoder matrix indicator (PMI) expressions based on the identified codebook configuration, wherein the transceiver is further configured to transmit, to the eNB, a reporting message including channel state information (CSI) based on the N 1 and N 2 .
  • CSI channel state information
  • RI included in CSI may be a recommended value of a rank for transmission.
  • the RI may indicate a number of layers to be used to downlink transmission.
  • the rank may mean a maximum number of streams that can be sent as different information in a given channel .
  • PMI may indicate precoder matrix recommended to the eNB when the number of layers indicated by the RI is used.
  • a number of rank associated with a codebook correspond to a number of layers for CSI reporting.
  • a rank-1 codebook indicates a codebook for 1-layer CSI reporting.
  • a rank-2 codebook indicates a codebook for 2-layer CSI reporting.
  • the processor 340 is also capable of identifying a pair of parameters comprising (d 1 , d 2 ) based on the N 1 and N 2 and parameterizing a codebook table based on the identified pair of parameters (d 1 , d 2 ).
  • a master codebook for a 1 layer CSI reporting is determined.
  • the master codebook for the 1 layer CSI reporting is determined.
  • the processor 340 is also capable of determining a first discrete fourier transform (DFT) vector (v m ) representing a vertical beam for the first dimension and a second DFT vector (u n ) representing a horizontal DFT beam for the second dimension; and swapping the PMI expressions in a rank 1 codebook and a rank 2 codebook for a codebook configuration 3 and a codebook configuration 4 based on the determined first and second DFT vectors.
  • the swapped PMI expressions comprise an order of (m 1 , m 2 ) based on the N 1 and N 2 .
  • a rank 1 precoder based on the swapped PMI expressions is determined as , where is .
  • the rank 1 precoder based on the swapped PMI expression is determined as where is .
  • the processor 340 can move data into or out of the memory 360 as required by an executing process.
  • the processor 340 is configured to execute the applications 362 based on the OS 361 or in response to signals received from eNBs or an operator.
  • the processor 340 is also coupled to the I/O interface 345, which provides the UE 116 with the ability to connect to other devices, such as laptop computers and handheld computers.
  • the I/O interface 345 is the communication path between these accessories and the processor 340.
  • the processor 340 is also coupled to the touchscreen 350 and the display 355.
  • the operator of the UE 116 can use the touchscreen 350 to enter data into the UE 116.
  • the display 355 may be a liquid crystal display, light emitting diode display, or other display capable of rendering text and/or at least limited graphics, such as from web sites.
  • the memory 360 is coupled to the processor 340.
  • Part of the memory 360 could include a random access memory (RAM), and another part of the memory 360 could include a Flash memory or other read-only memory (ROM).
  • RAM random access memory
  • ROM read-only memory
  • FIGURE 3 illustrates one example of UE 116
  • various changes may be made to FIGURE 3.
  • various components in FIGURE 3 could be combined, further subdivided, or omitted and additional components could be added according to particular needs.
  • the processor 340 could be divided into multiple processors, such as one or more central processing units (CPUs) and one or more graphics processing units (GPUs).
  • FIGURE 3 illustrates the UE 116 configured as a mobile telephone or smartphone, UEs could be configured to operate as other types of mobile or stationary devices.
  • FIGURE 4A is a high-level diagram of transmit path circuitry 400.
  • the transmit path circuitry 400 may be used for an orthogonal frequency division multiple access (OFDMA) communication.
  • FIGURE 4B is a high-level diagram of receive path circuitry 450.
  • the receive path circuitry 450 may be used for an orthogonal frequency division multiple access (OFDMA) communication.
  • the transmit path circuitry 400 may be implemented in a base station (eNB) 102 or a relay station, and the receive path circuitry 450 may be implemented in a user equipment (e.g. user equipment 116 of FIGURE 1).
  • eNB base station
  • the receive path circuitry 450 may be implemented in a user equipment (e.g. user equipment 116 of FIGURE 1).
  • the receive path circuitry 450 may be implemented in a base station (e.g. eNB 102 of FIGURE 1) or a relay station, and the transmit path circuitry 400 may be implemented in a user equipment (e.g. user equipment 116 of FIGURE 1).
  • a base station e.g. eNB 102 of FIGURE 1
  • the transmit path circuitry 400 may be implemented in a user equipment (e.g. user equipment 116 of FIGURE 1).
  • Transmit path circuitry 400 comprises channel coding and modulation block 405, serial-to-parallel (S-to-P) block 410, Size N Inverse Fast Fourier Transform (IFFT) block 415, parallel-to-serial (P-to-S) block 420, add cyclic prefix block 425, and up-converter (UC) 430.
  • Receive path circuitry 450 comprises down-converter (DC) 455, remove cyclic prefix block 460, serial-to-parallel (S-to-P) block 465, Size N Fast Fourier Transform (FFT) block 470, parallel-to-serial (P-to-S) block 475, and channel decoding and demodulation block 480.
  • DC down-converter
  • FFT Fast Fourier Transform
  • FIGURES 4A and 4B may be implemented in software, while other components may be implemented by configurable hardware or a mixture of software and configurable hardware.
  • the FFT blocks and the IFFT blocks described in this disclosure document may be implemented as configurable software algorithms, where the value of Size N may be modified according to the implementation.
  • the value of the N variable may be any integer number (i.e., 1, 4, 3, 4, etc.), while for FFT and IFFT functions, the value of the N variable may be any integer number that is a power of two (i.e., 1, 2, 4, 8, 16, etc.).
  • channel coding and modulation block 405 receives a set of information bits, applies coding (e.g., LDPC coding) and modulates (e.g., Quadrature Phase Shift Keying (QPSK) or Quadrature Amplitude Modulation (QAM)) the input bits to produce a sequence of frequency-domain modulation symbols.
  • Serial-to-parallel block 410 converts (i.e., de-multiplexes) the serial modulated symbols to parallel data to produce N parallel symbol streams where N is the IFFT/FFT size used in BS 102 and UE 116.
  • Size N IFFT block 415 then performs an IFFT operation on the N parallel symbol streams to produce time-domain output signals.
  • Parallel-to-serial block 420 converts (i.e., multiplexes) the parallel time-domain output symbols from Size N IFFT block 415 to produce a serial time-domain signal.
  • Add cyclic prefix block 425 then inserts a cyclic prefix to the time-domain signal.
  • up-converter 430 modulates (i.e., up-converts) the output of add cyclic prefix block 425 to RF frequency for transmission via a wireless channel.
  • the signal may also be filtered at baseband before conversion to RF frequency.
  • the transmitted RF signal arrives at UE 116 after passing through the wireless channel, and reverse operations to those at eNB 102 are performed.
  • Down-converter 455 down-converts the received signal to baseband frequency
  • remove cyclic prefix block 460 removes the cyclic prefix to produce the serial time-domain baseband signal.
  • Serial-to-parallel block 465 converts the time-domain baseband signal to parallel time-domain signals.
  • Size N FFT block 470 then performs an FFT algorithm to produce N parallel frequency-domain signals.
  • Parallel-to-serial block 475 converts the parallel frequency-domain signals to a sequence of modulated data symbols.
  • Channel decoding and demodulation block 480 demodulates and then decodes the modulated symbols to recover the original input data stream.
  • Each of eNBs 101-103 may implement a transmit path that is analogous to transmitting in the downlink to user equipment 111-116 and may implement a receive path that is analogous to receiving in the uplink from user equipment 111-116.
  • each one of user equipment 111-116 may implement a transmit path corresponding to the architecture for transmitting in the uplink to eNBs 101-103 and may implement a receive path corresponding to the architecture for receiving in the downlink from eNBs 101-103.
  • FIGURE 5 illustrates an example structure for a DL subframe 500 according to embodiments of the present disclosure.
  • An embodiment of the DL subframe structure 500 shown in FIGURE 1 is for illustration only. Other embodiments may be used without departing from the scope of the present disclosure.
  • the downlink subframe (DL SF) 510 includes two slots 520 and a total of symbols for transmitting of data information and downlink control information (DCI).
  • the first SF symbols are used to transmit PDCCHs and other control channels 530 (not shown in FIGURE 5).
  • the remaining - SF symbols are primarily used to transmit physical downlink shared channels (PDSCHs) 540, 542, 544, 546, and 548 or enhanced physical downlink control channels (EPDCCHs) 550, 552, 554, and 556.
  • PDSCHs physical downlink shared channels
  • EPDCCHs enhanced physical downlink control channels
  • a transmission bandwidth comprises frequency resource units referred to as resource blocks (RBs). Each RB comprises either sub-carriers or resource elements (REs) (such as 12 Res). A unit of one RB over one subframe is referred to as a physical RB (PRB). A UE is allocated to M PDSCH RBs for a total of REs for a PDSCH transmission BW. An EPDCCH transmission is achieved in either one RB or multiple of RBs.
  • RBs resource blocks
  • Each RB comprises either sub-carriers or resource elements (REs) (such as 12 Res).
  • a unit of one RB over one subframe is referred to as a physical RB (PRB).
  • a UE is allocated to M PDSCH RBs for a total of REs for a PDSCH transmission BW.
  • An EPDCCH transmission is achieved in either one RB or multiple of RBs.
  • a wireless environment for a Multiple-Input Multiple-Output (MIMO) system For supporting a MIMO system, a user equipment (UE) and an eNB in the present disclosure may use a precoding scheme which divides uplink information and downlink information to each of antennas appropriately according to channel state.
  • MIMO Multiple-Input Multiple-Output
  • the UE and the eNB may use a precoding scheme based on codebook information for precoding.
  • the UE and the eNB may determine beforehand a set of precoding matrices.
  • the UE may determine a precoding matrix indicator (PMI) indicating a certain precoding matrix in the set of precoding matrices by using information associated with channel state between the eNB.
  • the UE may transmit the PMI to the eNB. In this way, the eNB may share the certain precoding matrix with the UE.
  • the UE has been described as a receiver, and the eNB has been described as a transmitter, but it is not limited to such description. So, the UE may be described as a transmitter, and the eNB may be described as a receiver.
  • a codebook for two, four, or eight antenna ports or a codebook for a one-dimensional layout may share a codebook for eight, twelve, and sixteen antenna ports in full dimensional MIMO (FD-MIMO) with each other.
  • FD-MIMO full dimensional MIMO
  • FIGURE 6 illustrates an example antenna configurations and numbering 600 according to embodiments of the present disclosure.
  • An embodiment of the antenna configurations and numbering 600 shown in FIGURE 6 is for illustration only. Other embodiments may be used without departing from the scope of the present disclosure.
  • the antenna configurations and numbering 600 comprise a 16 port configuration A 605, a 12 port configuration A 610, a 16 port configuration B 615, and a 12 port configuration B 620.
  • a cross pol (or X-pol) antenna array is considered, in which a pair of antenna elements in the same physical location is polarized in two distinct angles (e.g., +45 degrees and -45 degrees).
  • the 16 port configuration A 605 and the 16 port configuration B 615 are antenna configurations with 16 CSI-RS ports comprising 8 pairs of x-pol antenna elements placed in a 2D antenna panel. The 8 pairs can be placed in 2x4 (e.g., 605) or 4x2 manner (e.g., 615) on horizontal and vertical dimensions.
  • the 12 port configuration 610 and the 12 port configuration B 620 are antenna configurations with 12 CSI-RS ports comprising 6 pairs of x-pol antenna elements placed in a 2D antenna panel.
  • the 6 pairs can be placed in 2x3 (e.g., 610) or 3x2 manner (e.g., 620) on horizontal and vertical dimensions.
  • antennas are indexed with integer numbers, 0, 1, ..., 15 for 16-port configurations (e.g., 605, 610), and 0, ..., 11 for 12-port configurations (e.g., 610, 620).
  • antenna numbers are assigned such that consecutive numbers are assigned for all the antenna elements for a first polarization and proceed to a second polarization.
  • antenna numbers 0-7 are assigned for a first polarization and 8-15 are assigned for a second polarization, and antenna numbers 0-3 are assigned for a first row and 4-7 are assigned for a second row.
  • Antenna numbers in tall arrays are obtained by simply rotating the fat antenna arrays (such as the 12-port configuration A 610 and 16-port configuration A 605) by 90 degrees.
  • a UE when a UE is configured with 12 or 16 port CSI-RS for a CSI-RS resource, the UE is configured to report a PMI feedback precoder according to the antenna numbers as shown FIGURE 6.
  • a rank-1 precoder, W m,n,p which is an N CSIRS x1 vector, to be reported by the UE is given by:
  • N CSIRS number of configured CSI-RS ports in the CSI-RS resource (e.g., 12, 16, etc.)
  • u n is a Nx1 oversampled DFT vector for a second dimension, whose oversampling factor is S N
  • An oversampling factor may be referred as an oversampling rate.
  • the oversampling factor is an oversampling factor for DFT.
  • W m,n,p may represent Kronecker product.
  • the equation may be expressed by using v m,n , instead of in the equation.
  • the equation for W m,n,p is expressed as following:
  • the dimension assignment can be done with N ⁇ M according to the numbering scheme 1 as shown in FIGURE 6, with (N,M) ⁇ ⁇ (4,2),(4,3),(2,2) ⁇ ; alternatively, the dimension assignment can be done with N ⁇ M with swapping the role of columns and rows, with (N,M) ⁇ ⁇ (2,4),(3,4),(2,2) ⁇ according to the numbering scheme 2 as shown in FIGURE 6.
  • a set of oversampling factors that can be configured for S N and S M are ⁇ 2, 4, 8 ⁇ ; and m, m' ⁇ ⁇ 0, 1,..., S M M ⁇ , and n, n' ⁇ ⁇ 0,1,..., S N N ⁇ .
  • a submatrix of W m,n,p corresponds to a precoder applied on 8 co-pol elements, whose antenna numbers are 0 through 7.
  • u n is a 4x1 vector representing a horizontal DFT beam and v m is a 2x1 vector representing a vertical DFT beam.
  • v m is a 2x1 vector representing a horizontal DFT beam.
  • v m can be written as: .
  • u n can be written as: .
  • u n can be written as: .
  • FIGURE 7 illustrates an example precoding weight application 700 to antenna configurations according to embodiments of the present disclosure.
  • An embodiment of the precoding weight application 700 to antenna configurations shown in FIGURE 7 is for illustration only. Other embodiments may be used without departing from the scope of the present disclosure.
  • the precoding weight application 700 comprises a 16 port configuration A 705 and a 16 port configuration B 710.
  • Precoding weights to be applied to antenna port numbers 0 through 3 in the 16 port configuration A 705 and B 710 are u n
  • the precoding weights to be applied to antenna ports numbers 4 through 7 in the 16 port configuration A 705 and B 710 are with an appropriate power normalization factor.
  • precoding weights to be applied to antenna port numbers 8 through 11 are u n'
  • the precoding weights to be applied to antenna ports 12 through 15 are with an appropriate power normalization factor.
  • the number ring scheme 1 and 2 in FIGURE 6 may be applied to the precoding weight application 700 as shown in FIGURE 7.
  • FIGURE 8 illustrates an example antenna element (or transmit resource unit (TXRU)) numbering 800 according to embodiments of the present disclosure.
  • An embodiment of the antenna element (or transmit resource unit (TXRU)) numbering 800 shown in FIGURE 8 is for illustration only. Other embodiments may be used without departing from the scope of the present disclosure.
  • TXRU 2D rectangular antenna array
  • the TXRU can be associated with multiple antenna elements.
  • an antenna array comprising a column with a same polarization of a 2D rectangular array is partitioned into M groups of consecutive elements, and the M groups correspond to the M TXRUs in a column with a same polarization in the TXRU array as shown in FIGURE 8.
  • REs resource elements
  • a UE is configured with a CSI-RS configuration via higher layer, configuring Q antenna ports - antenna ports A(1) through A(Q).
  • the UE is further configured with CSI reporting configuration via higher layer in association with the CSI-RS configuration.
  • the CSI reporting configuration includes information element (IE) indicating the CSI-RS decomposition information (or component PMI port configuration).
  • the first dimension may correspond to the horizontal direction or columns
  • the first dimension may correspond to the vertical direction or rows
  • N 1 , N 2 a notation (N 1 , N 2 ) will be used in place of (M, N) or (N, M).
  • O 1 , O 2 a notation (O 1 , O 2 ) will be used for the oversampling factors in the two dimensions in place of (S N , S M ) or (S M , S N ).
  • a beam grouping scheme and a codebook can be defined in terms of two groups of parameters and one group per dimension.
  • a group of parameters for dimension d comprises at least one of a number of antenna ports per pol N d , an oversampling factor O d , a skip number (or beam group spacing) s d (e.g., for W1), a beam offset number f d , a beam spacing number p d (e.g., for W2), or a number of beams (in each beam group) L d .
  • the Config is a parameter indicating a subset of a codebook entry, and is referred as a codebook configuration parameter.
  • the N 1 , N 2 , O 1 , O 2 , and the codebook configuration parameter are parameters for configuring a codebook table, and are configured via higher layer signaling.
  • m i is the index for X i and an associated codebook table is defined in terms of i' 2 , i 11 and i 12 .
  • a UE selects 4 or 16 CWs for the second PMI i 2 to be reported on PUSCH, based on Config from Table 3, wherein the corresponding rank 1 precoder is given by:
  • the same codebook table may be used for representing the different pre-coding vectors and matrices in the two layouts.
  • the one codebook table is referred as a master codebook table.
  • two symmetric port configurations may be defined for N 1 ⁇ N 2 (configuration A) and N 1 ⁇ N 2 (configuration B) as shown FIGURE 6.
  • the pre-coder may be derived differently depending on the configured antenna port configuration(i.e. a combination of (N 1 , N 2 )).
  • an order of (m 1 , m 2 ) in expression may be swapped dependent on a configuration.
  • the m 1 is an index indicating a beam for the first dimension
  • the m 2 is an index indicating a beam for the second dimension.
  • the m 1 is an index of a first discrete fourier transform (DFT) vector representing the beam for the first dimension
  • the m 2 is an index of a second discrete fourier transform (DFT) vector representing the beam for the second dimension.
  • DFT discrete fourier transform
  • the UE derives the rank-1 pre-coder as
  • the order is swapped as (m 2 , m 1 )
  • the UE derives the rank-1 pre-coder as .
  • the configuration may be given by:
  • the configuration may be given by:
  • the codebook table of the Table 2 may be represented according to a following Table 4. l and m of the table 4 correspond to the m 1 and the m 2 , as described above, respectively.
  • the codebook table of the Table 2 may be represented according to a following Table 5.
  • l and m of the table 4 correspond to the m 1 and the m 2 , as described above, respectively.
  • the UE and the eNB may identify a precoder codebook for both a case of ( N 1 ⁇ N 2 ) and a case of (N 1 ⁇ N 2 ) from rank-1 codebook table(namely, a codebook for 1 layer CSI reporting) by swapping an index associated with the first dimension (i.e. i 1,1 or l) and an index associated with the second dimension (i.e. i 1,2 or m).
  • rank-1 pre-coder is presented as .
  • the alternate expression for rank-1 pre-coder is given by for (N 1 ⁇ N 2 ) and for (N 1 ⁇ N 2 ).
  • Table 6 shows four configurations for rank-2 and Table 7A and 7B show a master codebook for 2 layers CSI reporting.
  • the rank-2 codebook table may be represented according to a following Table 8. l and m of the table 4 correspond to the m 1 and the m 2 , as described above, respectively.
  • the rank-2 codebook table may be represented according to a following Table 9. l and m of the table 4 correspond to the m 1 and the m 2 , as described above, respectively.
  • the UE and the eNB may identify a precoder codebook for both a case of ( N 1 ⁇ N 2 ) and a case of (N 1 ⁇ N 2 ) from rank-2 codebook table(namely, a codebook for 2 layer CSI reporting) by swapping an index associated with the first dimension (i.e. i 1,1 or l) and an index associated with the second dimension (i.e. i 1,2 or m).
  • a second alternative design for Configuration 3 (described in Table 10 and Table 11) is also considered.
  • Table 10 shows a description of an alternative design for configuration 3 in rank-2 codebook.
  • Table 11 shows a codebook table for alternative design for configuration 3 in rank02 codebook.
  • FIGURE 9 illustrates an example rank 3-4 orthogonal beam pair construction 900 according to embodiments of the present disclosure.
  • An embodiment of the rank 3-4 orthogonal beam pair construction 900 shown in FIGURE 9 is for illustration only. Other embodiments may be used without departing from the scope of the present disclosure.
  • the rank 3-4 orthogonal beam pair construction 900 comprises a leading beam group 905, rank 3-4 orthogonal beams for 2D antenna 910, and rank 3-4 orthogonal beams for 1D antenna 915.
  • the codebook for a given rank value is characterized by four parameters such as ⁇ i 11 ,i 12 ,k,i 2 ⁇ . Different values of parameter k are used to construct different types of orthogonal beam groups for rank 3-4 codebook.
  • An illustration of four orthogonal beam types, indexed by k 0, 1, 2, 3, is shown in FIGURE 9 and a single rank 3-4 codebooks tables are constructed for all orthogonal beam types.
  • Table 12 shows orthogonal beam type to ( ) mapping and Table 13 shows an alternate orthogonal beam type to ( ) mapping.
  • Table 14 shows a codebook for 3 layers CSI reporting and Table 15 shows a codebook for 4 layers CSI reporting.
  • FIGURE 10 illustrates an example orthogonal beam 1000 for rank 3-4 according to embodiments of the present disclosure.
  • An embodiment of the orthogonal beam 1000 for rank 3-4 shown in FIGURE 10 is for illustration only. Other embodiments may be used without departing from the scope of the present disclosure.
  • the orthogonal beam 1000 for rank 3-4 comprises a configuration 1 1005, a configuration 2 1010, a configuration 3 1015, and a configuration 4 1020.
  • a UE is configured with a beam group configuration from four configurations, namely the configuration 1 1005, the configuration 2 1010, the configuration 3 1015, and the configuration 4 1020, for codebook subset selection on mater rank 3-4 codebooks.
  • k 0
  • an illustration of the four configurations is shown FIGURE 10.
  • the UE selects i' 2 indices (in Table 14 and Table 15) according to Table 16 and Table 17 for rank 3 and rank 4, respectively, for PMI reporting.
  • the parameters (s 1 ,s 2 ) and (p 1 ,p 2 ) for the four configurations are shown in Table 16 and Table 17.
  • Table 16 shows selected i' 2 indices for rank-3 CSI reporting and Table 17 shows selected i' 2 indices for rank-4 CSI reporting.
  • a UE is configured with a second alternative design for a configuration 3 in rank 3-4 codebook, which is described in Table 18.
  • Table 18 shows a description of alternative design for the configuration 3 in rank 3-4 codebook.
  • a UE feeds back k in PMI as part of W1 indication.
  • k is jointly encoded with i 1 indication(s) or (i 1,1 , i 1, 2 ) indication.
  • a UE is configured with a k value.
  • a UE may be configured with at least one of examples.
  • a UE is configured with rank 3-4 codebook tables as shown in Table 14 and Table 15 with (s 1 , s 2 ) and (p 1 , p 2 ) parameters according to Table 19.
  • Table 19 is for N 1 ⁇ N 2 case.
  • the parameter table is obtained by swapping the dimension indices (1, 2) with (2, 1) in Table 19.
  • an effective oversampling factor for the parameters in Table 19 is (4, 4), which is the same as the effective oversampling factor in LTE specification codebook.
  • corresponding beam indices are 0, 2, 4, 6, etc. in the two dimensions.
  • beams (0, 2) form one beam group
  • beams (4, 6) form the next beam group, and so on.
  • beams (0, 2, 4, 6) form one beam group, beams (8, 10, 12, 14) form the next beam group, and so on, and in 2nd dimension, beams (0, 2) form one beam group, beams (4, 6) form the next beam group, and so on.
  • beams (0, 2, 4, 6) form one beam group
  • beams (8, 10, 12, 14) form the next beam group, and so on
  • beam 0 forms one beam group
  • beam 2 forms the next beam group, and so on. Note that the effective oversampling factor is maintained at (O 1 , O 2 ) for configuration 1.
  • a UE is configured with rank 3-4 codebook tables as shown in Table 14 and Table 15 with (s 1 , s 2 ) and (p 1 , p 2 ) parameters according to Table 20, which corresponds to effective oversampling factors the same as the configured oversampling factors.
  • Table 20 shows (s 1 ,s 2 ) and (p 1 ,p 2 ) parameters for rank 3-4 codebook for N 1 ⁇ N 2 .
  • a UE is configured with rank 3-4 codebook tables in Table 14 and 15 with (s 1 , s 2 ) and (p 1 , p 2 ) parameters the same as in the rank 1-2 codebook.
  • the parameters are given by Table 21.
  • Table 21 shows (s 1 , s 2 ) and (p 1 , p 2 ) parameters for rank 3-4 codebook for N 1 ⁇ N 2.
  • the proposed codebooks are characterized by two parameters such as ⁇ i 11 ,i 12 ⁇ . Consequently, only W1 feedback applies.
  • the precoding matrices are as in the following, where are determined by the RRC ‘Config’ parameter that can take values 1,2,3,4.
  • FIGURE 11 illustrates an example orthogonal beam grouping 1100 for rank 5-8 according to embodiments of the present disclosure.
  • An embodiment of the orthogonal beam grouping 1100 for rank 5-8 shown in FIGURE 11 is for illustration only. Other embodiments may be used without departing from the scope of the present disclosure.
  • the orthogonal beam grouping 1100 comprises beams in the second dim 1105 and beams in the first dim 1110.
  • FIGURE 12 illustrates another example orthogonal beam grouping 1200 for rank 5-8 according to embodiments of the present disclosure.
  • An embodiment of the orthogonal beam grouping 1200 for rank 5-8 shown in FIGURE 12 is for illustration only. Other embodiments may be used without departing from the scope of the present disclosure.
  • FIGURE 13 illustrates yet another example orthogonal beam grouping 1300 for rank 5-8 according to embodiments of the present disclosure.
  • An embodiment of the orthogonal beam grouping 1300 for rank 5-8 shown in FIGURE 13 is for illustration only. Other embodiments may be used without departing from the scope of the present disclosure.
  • FIGURE 14 illustrates yet another example orthogonal beam grouping 1400 for rank 5-8 according to embodiments of the present disclosure.
  • An embodiment of the orthogonal beam grouping 1400 for rank 5-8 shown in FIGURE 14 is for illustration only. Other embodiments may be used without departing from the scope of the present disclosure.
  • FIGURE 15 illustrates yet another example orthogonal beam grouping 1500 for rank 5-8 according to embodiments of the present disclosure.
  • An embodiment of the orthogonal beam grouping 1500 for rank 5-8 shown in FIGURE 15 is for illustration only. Other embodiments may be used without departing from the scope of the present disclosure.
  • Config 3 There are two alternatives for Config 3, which are shown in FIGURE 12 and FIGURE 13 for 12 ports, and in FIGURE 14, and FIGURE 15 for 16 ports.
  • For 12 ports are defined in Table 23, and for 16 ports they are defined in Table 24.
  • Table 23 shows delta values for 12-port rank 5-8 codebooks.
  • Table 24 shows delta values for 16-port rank 5-8 codebooks
  • (s 1 , s 2 ) values for rank 5-8 codebook is given by Table 25 or Table 26.
  • Table 25 shows (s 1 , s 2 ) parameters for rank 5-8 codebook for N 1 ⁇ N 2 .
  • Table 26 shows (s 1 , s 2 ) parameters for rank 5-8 codebook.
  • the aforementioned examples may be used in future when N 1 (or N 2 ) > 2.
  • Table 27 shows (s 1 , s 2 ) parameters for rank 5-8 codebook for N 1 ⁇ N 2 : 8 ports.
  • a UE is configured with rank 5-8 codebook tables with the same (s 1 , s 2 ) parameters such that the effective oversampling factor is the same as configured oversampling factors, i.e., according to Table 29. Again, two alternatives are allowed for i 1,2 in case of Config 1-3. Table 29 shows (s 1 , s 2 ) parameters for rank 5-8 codebook: N 1 ⁇ N 2 : 12, 16 ports.
  • a leading beam index of orthogonal beam groups depends on the value of N 1 , i.e., it is a multiple of N 1 .
  • N 1 i.e., it is a multiple of 6 .
  • the leading beam index is a multiple of 8.
  • Table 30 shows (s 1 , s 2 ) parameters for rank 5-8 codebook for N 1 ⁇ N 2 : 12, 16 ports.
  • the KP expressions can be swapped for the two configurations, i.e., if N 1 ⁇ N 2 , ; and if N 1 ⁇ N 2 , .
  • the aforementioned expressions may be applied various embodiments of the present disclosure for other ranks as well.
  • the master rank-1 codebook is given by Table 31A and 31B, where and .
  • Table 31A and 31B show a master codebook for 1 layer CSI reporting (e.g., parameterized).
  • the parameterized master codebook can be constructed similarly.
  • the order in which the Kronecker product is performed is dependent on the configuration. For instance, for the configuration in which N 1 ⁇ N 2 , the UE derives the rank-1 pre-coder as , and for the configuration in which N 1 ⁇ N 2 , the UE derives the rank-1 pre-coder as . Note that the orders in which the Kronecker product is performed in the two expressions are opposite in order to ensure that the dimensions of the two vectors to the left and to the right of Kronecker operator are the same in the two expressions.
  • the KP expressions can be swapped for the two configurations, i.e., if N 1 ⁇ N 2 , and if N 1 ⁇ N 2 , .
  • the aforementioned expression may be applied to various embodiments of the present disclosure for other ranks as well.
  • the pre-coding matrix is given by for N 1 ⁇ N 2 (config A) and for N 1 ⁇ N 2 (config B).
  • rank 3-8 for the two configurations can be expression similarly. Similar to rank-1, for rank 2-8 also, the master rank 2-8 codebooks in this case remain the same as aforementioned earlier in the present disclosure.
  • the beam grouping schemes or (L 1 , L 2 ) configurations or codebook subset selection are applicable straightforwardly to this case once the master table for each of antenna port configurations is implemented.
  • the pre-coder for one of the symmetric port configuration is derived from that for the other symmetric port configuration by applying a fixed mapping on the elements of the pre-coding vector.
  • the UE derives the rank-1 pre-coder as , and for the configuration in which N 1 ⁇ N 2 (config B), the UE derives the rank-1 pre-coder as , where the mapping function is defined as
  • the pre-coder for N 1 ⁇ N 2 can be derived by applying a similar fixed mapping on the pre-coder for N 1 ⁇ N 2 case.
  • the mapping can be constructed similarly.

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Abstract

La présente invention concerne un système de communication de pré-5ième génération (5G) ou 5G pour prendre en charge des débits de données supérieurs dépassant ceux d'un système de communication de 4ième génération (4G), tel qu'un système d'évolution à long terme (LTE). L'invention concerne un équipement utilisateur (UE) dans un réseau de communication sans fil évolué, l'UE comprenant un émetteur-récepteur configuré pour recevoir, d'un nœud B évolué (eNB), des signaux de liaison descendante pour indiquer des paramètres d'un livre de codes de pré-codeur qui comprennent un premier nombre de ports d'antenne (N1) pour une première dimension, un second nombre de ports d'antenne (N2) pour une seconde dimension, et une configuration de livre de codes, et au moins un processeur configuré pour déterminer un pré-codeur par permutation d'un premier indice associé à la première dimension et d'un second indice associé à la seconde dimension, déterminé sur la base de N1 et de N2. L'émetteur-récepteur est en outre configuré pour transmettre, à l'eNB, des informations d'état de canal (CSI) comprenant les informations pour indiquer le pré-codeur.
PCT/KR2016/011926 2015-10-23 2016-10-21 Livre de codes de pré-codeur pour des systèmes de communication sans fil évolués WO2017069580A1 (fr)

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US15/246,502 US10439690B2 (en) 2015-10-23 2016-08-24 Precoder codebook for advanced wireless communication systems
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Cited By (4)

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Publication number Priority date Publication date Assignee Title
WO2019157742A1 (fr) * 2018-02-14 2019-08-22 华为技术有限公司 Procédé de traitement d'informations de matrice d'informations d'état de canal et appareil de communication
CN110999117A (zh) * 2017-08-04 2020-04-10 三星电子株式会社 用于先进无线通信系统中的csi报告的波束选择的方法和装置
CN111869277A (zh) * 2018-03-28 2020-10-30 三星电子株式会社 无线通信系统中参考信号功率增加的装置和方法
EP3952120A4 (fr) * 2019-03-29 2022-06-08 Huawei Technologies Co., Ltd. Procédé et appareil de communication

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130308715A1 (en) * 2012-05-18 2013-11-21 Samsung Electronics Co., Ltd Apparatus and method for channel state information codeword construction for a cellular wireless communication system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130308715A1 (en) * 2012-05-18 2013-11-21 Samsung Electronics Co., Ltd Apparatus and method for channel state information codeword construction for a cellular wireless communication system

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
CMCC: "KP-based 2D codebook and performance evaluations", R1-155793, 3GPP TSG RAN WG1 MEETING #82BIS, 26 September 2015 (2015-09-26), Malm, Sweden, XP051021764 *
ERICSSON: "Comparing non-precoded and beamformed CSI-RS enhancements", RI-153166, 3GPP TSG-RAN WG1#81, 16 May 2015 (2015-05-16), Fukuoka, Japan, XP050973351 *
HUAWEI ET AL.: "Codebook design for 12 and 8 ports 2D antenna arrays", R1-155651, 3GPP TSG RAN WG1 MEETING #82BIS, 26 September 2015 (2015-09-26), Malmo, Sweden, XP051021672 *
SAMSUNG: "Rank 1-2 codebook for Class A CSI reporting", R1-155492, 3GPP TSG RAN WG1 MEETING #82B, 25 September 2015 (2015-09-25), Malmo, Sweden, XP051021367 *
ZTE: "Discussion on precoder and PMI construction for FD-MIMO", RI-155269, 3GPP TSG RAN WG1 MEETING #82BIS, 26 September 2015 (2015-09-26), Malm, Sweden, XP051021501 *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110999117A (zh) * 2017-08-04 2020-04-10 三星电子株式会社 用于先进无线通信系统中的csi报告的波束选择的方法和装置
CN110999117B (zh) * 2017-08-04 2023-11-24 三星电子株式会社 用于先进无线通信系统中csi报告的波束选择的方法和装置
WO2019157742A1 (fr) * 2018-02-14 2019-08-22 华为技术有限公司 Procédé de traitement d'informations de matrice d'informations d'état de canal et appareil de communication
CN111587543A (zh) * 2018-02-14 2020-08-25 华为技术有限公司 信道状态信息矩阵信息处理方法及通信装置
CN111587543B (zh) * 2018-02-14 2021-10-01 华为技术有限公司 信道状态信息矩阵信息处理方法及通信装置
CN111869277A (zh) * 2018-03-28 2020-10-30 三星电子株式会社 无线通信系统中参考信号功率增加的装置和方法
US11902909B2 (en) 2018-03-28 2024-02-13 Samsung Electronics Co., Ltd. Apparatus and method for reference signal power boosting in a wireless communication system
EP3952120A4 (fr) * 2019-03-29 2022-06-08 Huawei Technologies Co., Ltd. Procédé et appareil de communication
US11929799B2 (en) 2019-03-29 2024-03-12 Huawei Technologies Co., Ltd. Communication method and apparatus

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