WO2015149250A1 - Dispositif de détermination de tables de codes, dispositif de renvoi d'informations et système de communication - Google Patents

Dispositif de détermination de tables de codes, dispositif de renvoi d'informations et système de communication Download PDF

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Publication number
WO2015149250A1
WO2015149250A1 PCT/CN2014/074457 CN2014074457W WO2015149250A1 WO 2015149250 A1 WO2015149250 A1 WO 2015149250A1 CN 2014074457 W CN2014074457 W CN 2014074457W WO 2015149250 A1 WO2015149250 A1 WO 2015149250A1
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WIPO (PCT)
Prior art keywords
antenna
codebook
weighting
antenna port
particles
Prior art date
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PCT/CN2014/074457
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English (en)
Chinese (zh)
Inventor
宋磊
张翼
朱晨曦
周华
Original Assignee
富士通株式会社
宋磊
张翼
朱晨曦
周华
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
Application filed by 富士通株式会社, 宋磊, 张翼, 朱晨曦, 周华 filed Critical 富士通株式会社
Priority to CN201480065359.5A priority Critical patent/CN105794041B/zh
Priority to PCT/CN2014/074457 priority patent/WO2015149250A1/fr
Publication of WO2015149250A1 publication Critical patent/WO2015149250A1/fr

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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
    • H04B7/0478—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
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting

Definitions

  • Codebook determining device information feedback device and communication system
  • the present invention relates to the field of communications, and in particular, to a codebook determining apparatus, an information feedback apparatus, and a communication system. Background technique
  • MIMO Multiple Input Multiple Output
  • LTE-Advanced Enhanced Long Term Evolution
  • MIMO technology uses a horizontally placed one-dimensional (1D) linear array with adaptive capability on a horizontal plane, namely two-dimensional (2D) MIMO technology.
  • 2D MIMO technology uses a 2D planar array with the Active Antenna System (AAS) technology, to provide adaptive control in both horizontal and elevation dimensions to improve system performance.
  • AAS Active Antenna System
  • Figure 1 and Figure 2 show two common planar array structures.
  • Figure 1 is a schematic diagram of a cross-polarized two-dimensional planar array.
  • Figure 2 is a schematic diagram of a uniform linear two-dimensional planar array.
  • M cross-polarized antenna pairs are placed in each column in the vertical direction, and N columns of cross-polarized antenna pairs are placed in the horizontal direction.
  • M antenna arrays of the same polarization direction (such as the vertically polarized antenna in Fig. 2) are placed in each column in the vertical direction, and N columns are placed in the horizontal direction.
  • the overhead of the reference signal also increases.
  • multiple antenna elements in the vertical direction can be virtualized into one antenna port to transmit the same reference signal.
  • the beam direction in the vertical direction is adjusted by weighting a plurality of antenna particles.
  • the weighting of the antenna port is a precoding operation in the conventional sense.
  • the 3D MIMO system is degraded into a 1D horizontal array system, so that the LTE system can use an existing codebook (such as a horizontal codebook of the previous version protocol).
  • an existing codebook such as a horizontal codebook of the previous version protocol.
  • the existing codebook will not be used directly, and the codebook suitable for the antenna configuration needs to be re-determined.
  • Embodiments of the present invention provide a codebook determining apparatus, an information feedback apparatus, and a communication system, and a codebook determined by the apparatus is suitable for a two-dimensional planar antenna array having any plurality of antenna ports including antenna elements.
  • a codebook determining apparatus including:
  • a codebook determining unit configured to determine a first codebook set formed by antenna particle weighting, and/or a second codebook set formed by antenna port weighting
  • the first codebook set is determined by the following formula (1):
  • the second codebook set is determined using the following formula (2):
  • the wavelength of the electromagnetic wave is expressed; the pitch of the antenna particles in the vertical direction; the number of antenna particles of one antenna port formed in the vertical direction, which is a positive integer greater than zero;
  • an information feedback apparatus comprising:
  • An information determining unit configured to determine, according to the predicted number of antenna particles of each antenna port, the first codebook set formed by weighting the antenna particles, and/or the second codebook set formed by antenna port weighting Antenna particle weighted information and/or antenna port weighted information fed back to the base station;
  • a feedback unit configured to feed back information of antenna particle weighting and/or antenna port weighting to the base station.
  • a communication system including a base station, where the communication
  • the system further includes a user equipment, the user equipment, according to the predicted number of antenna particles of each antenna port, the first codebook set formed by weighting the antenna particles, and/or the second codebook set by the antenna port weighting, to the base station Feedback antenna particle weighted information and/or antenna port weighted information.
  • an advantageous effect of embodiments of the present invention is that the codebook determined by the above embodiment is suitable for a two-dimensional planar antenna array having any plurality of antenna ports including antenna elements.
  • Figure 1 is a schematic diagram of a cross-polarized two-dimensional planar array structure
  • FIG. 2 is a schematic diagram of a uniform linear two-dimensional planar array structure
  • FIG. 3 is a schematic diagram of a phase shift vector, antenna particle weighting, and antenna port weighting caused by a position in the case where two antenna ports are vertically arranged;
  • Figure 5 is a block diagram showing the structure of a codebook determining apparatus according to Embodiment 4 of the present invention.
  • FIG. 6 is a schematic diagram showing the structure of a base station according to Embodiment 5 of the present invention.
  • Figure 7 is a block diagram showing the structure of a communication system according to Embodiment 6 of the present invention.
  • FIG. 8 is a schematic structural diagram of a user equipment according to Embodiment 6 of the present invention.
  • FIG. 9 is a flowchart of an information feedback method according to Embodiment 7 of the present invention.
  • Figure 10 is a block diagram showing the structure of an information feedback apparatus according to Embodiment 8 of the present invention.
  • FIG. 11 is a schematic structural diagram of a user equipment according to Embodiment 9 of the present invention.
  • Figure 12 is a block diagram showing the structure of an information feedback apparatus according to Embodiment 10 of the present invention.
  • Figure 13 is a block diagram showing the structure of a base station according to Embodiment 11 of the present invention. detailed description
  • embodiments of the present invention provide a codebook determining method, a device thereof, an information feedback method, a device thereof, and a communication system.
  • the code determined by the codebook determining method of the embodiment of the present invention can be applied to a two-dimensional planar antenna array having any number of antenna ports including a plurality of antenna elements.
  • Fig. 4 is a flow chart showing the method of determining a codebook according to the first embodiment of the present invention. As shown in FIG. 4, the method includes: Step 401: The base station determines a first codebook set formed by antenna particle weighting, and/or a second codebook set formed by antenna port weighting.
  • the first codebook set can be determined by using the following formula (1):
  • the second codebook ⁇ A formed by the weight of the antenna port can be determined by the following formula (2).
  • the wavelength of the electromagnetic wave is expressed; the pitch of the antenna particles in the vertical direction; the number of antenna particles of one antenna port formed in the vertical direction, which is a positive integer greater than zero;
  • the index of the antenna particle that constitutes an antenna port in the vertical direction is [1, K], which is the size of the codebook formed by weighting the antenna particles, indicating that the codeword used is at the antenna.
  • the polarization directions of the same column antenna particles may be the same or different.
  • the formula (1) can determine a set of codebooks, that is, each value corresponds to a set of codebooks.
  • the codebook sizes corresponding to each value may be the same or different.
  • the formula ( 2 ) can determine a set of codebook sets, that is, each M value corresponds to a set of codebooks.
  • the codebook sizes ⁇ corresponding to each M value may be the same or different.
  • the formula (2) can determine a set of codebooks, that is, each value corresponds to a set of codebooks.
  • the corresponding second codebook set is:
  • the codebook sizes corresponding to each threshold may be the same or different.
  • both the first codebook set and the second codebook set are related to the number of antenna particles, and weighting the antenna particles affects the number of vectors in the first codebook set, and for the second codebook set. , affects the specific value in the ⁇ expression.
  • the antenna particle weighting and the antenna port weighted codebook have the same fineness, when 2 , the antenna particle weighting can be
  • the codebook weighted by the antenna port is divided more finely, and V l 2 can be divided, that is, the antenna port weight is more finely divided than the antenna particle weighted codebook.
  • the codebook of any antenna port of the planar antenna array can be determined by the foregoing method, which solves the problems in the prior art, and can also be applied to various situations, such as the same polarization, different polarizations, and multiple Rank transmission, multi-column antenna, etc.
  • the foregoing codebook set may be generated by the base station and may be stored, and may further notify the user equipment, so that the user equipment feeds back relevant information to the base station according to the foregoing codebook set.
  • the method may further include: Step 402: Notify the user equipment of the determined first codebook set and/or the second codebook set.
  • the foregoing codebook set may be transmitted through any existing signaling or newly established signaling.
  • the user equipment may be notified by dynamic signaling or semi-static manner.
  • the step 402 is an optional step.
  • the value of the pitch of the antenna particles may be small, such as
  • the beamforming technique can be used to concentrate the energy of the transmitted signal at a specific position, but the pitch of the antenna particles is not limited to the above values.
  • the adjustment factor "in the formula (2) may be equal to 1, But not limited to the value.
  • the adjustment factor is the first phase shift factor
  • the adjustment factor when the rank is equal to 1, for one or more antenna arrays in the vertical direction, for the first column antenna, the adjustment factor is a first adjustment factor, and when the same column antenna particles have the same polarization direction, The first adjustment factor may be 1; when the same column of antenna particles has different polarization directions, the first adjustment factor may be the first phase shift factor; for other column antennas other than the first column antenna, the adjustment factor is a second adjustment factor, when each column of antenna particles has the same polarization direction, the second adjustment factor may be a second phase shift factor or a complex number; when each column of antenna particles has different polarization directions, the second adjustment factor may be The product of the first phase shift factor and the second phase shift factor or complex.
  • the second phase shift factor or complex may be weighted for the antenna port in the horizontal direction, but is not limited to this case.
  • the second adjustment factors of the different column antennas may be the same or different.
  • the codebook set by the antenna port weight obtained when the rank is equal to 1 can be used to determine the code formed by the antenna port weight when the rank is greater than 1.
  • the book set for example, may be pre-coded with a rank of 2 or more in a manner determined by a householder transform or an eight-antenna pre-coded multi-rank transport codeword in LTE Release 10.
  • the codebook set formed by the antenna packet weighting and the antenna port weighting can be determined by the above method, and the codebook set can be applied to any antenna port having any antenna particles.
  • Two-dimensional planar antenna array such as one or more antenna ports, a column of co-polarized antenna configurations in the vertical direction, and a cross-polarized antenna configuration in the same column of antenna particles with different polarization directions, vertical
  • a multi-column antenna array of directions is also applicable to the case where the transmission rank is equal to 1 or greater than 1.
  • a plurality of antenna elements in the vertical direction can be virtualized into one antenna port.
  • antenna particles in the same polarization direction form an antenna port, and there are a total of M antenna ports in the vertical direction, and a total of N antenna ports in the horizontal direction.
  • phase shift vectors of the MK antenna particles in the same polarization direction due to the placement position are:
  • the vector of all antenna particle weightings is:
  • W-[w 1 , v 2 ,---, v / ,---, v Mf f , w,(l 1,2,- --,MK); where W/ denotes the antenna element Antenna particle weighting vector;
  • the antenna port weighting that is, the precoding vector when the rank is 1:
  • the weighting vectors composed of the antenna elements of the respective antenna ports may be the same, that is,
  • FIG. 3 shows the phase shift vector and the antenna particle weight vector caused by the position of the antenna particles in the case of two antenna ports in the vertical direction.
  • phase shift vector of each antenna particle due to the placement position can be expressed as: In equation (3), the angle of departure from the elevation angle, the meaning of the same symbols as in equations (1) and (2) is not explained here.
  • ⁇ represents an electronic downtilt angle
  • 0 represents a vertical angle to the antenna array; wherein, in the art, an angle at which the antenna is physically tilted is referred to as a mechanical downtilt angle, and the weight can also be adjusted.
  • the mechanical downtilt is similar in effect and, therefore, is referred to as the electronic downtilt.
  • the antenna particle weighting with the above form is matched with the position vector in the form of a Discrete Fourier Transform (DFT) vector, and the formula (4) can also be expressed as:
  • DFT Discrete Fourier Transform
  • the set of codebooks formed by the weighting of the antenna particles can be obtained by the formula (4) or (5).
  • the size of the codebook formed by weighting the antenna particles "1 indicates the index of the codeword used in the antenna particle codebook set.
  • a series of codebook sets determined by equation (5) The codebook sizes corresponding to each possible threshold may be the same or different.
  • the adjustment factor in equation (2) is equal to 1.
  • the antenna array factor is: AF
  • the phase shift vector is an exponential form, and therefore, further, /: - two, using the above relationship, the array According to the above matrix factor, the antenna particle weighting and the antenna port weighting are both the phase shifting direction of the antenna particles.
  • the DFT form is used to represent antenna port weighting (precoding).
  • the codebook set formed by the antenna port weighting can be obtained by the formula (8) or (9).
  • ⁇ is the size of the codebook formed by weighting the antenna port
  • 2 represents the index of the codeword used in the codebook set.
  • the codebook sizes corresponding to each possible M value may be the same or different.
  • N n N 2 may be a power of 2, 8, 16, 64, 64, 128, or a power of 2.
  • the process of obtaining the first codebook set and the second codebook set is as follows, the first codebook and the second codebook are both related to a position vector, and an elevation angle in the position vector is from 0- 2 Uniform quantization, using 2 ⁇ 3 ⁇ 4/ ⁇ 1 or 2 ⁇ 2 / ⁇ to represent the quantized value, where the value is 0 to ⁇ 1 _ 1, " The value of 2 is
  • the weight vectors composed of the antenna elements of the respective antenna ports are the same, but the application of the first codebook set and the second codebook set determined by the above method is not limited by this assumption.
  • the case where the weighting vectors composed of the antenna elements of the respective antenna ports are different, and the case of the multi-column vertical antennas and the different polarization directions can be determined by the adjustment factor based on the above results.
  • Example 3 The above description is made by taking the weight of the vertical antenna port in the same polarization direction as an example, and is applied to the transmission case where the rank is equal to 1. The following describes the case of multi-column vertical antennas, different polarization directions in the same column, and multi-rank transmission.
  • Example 3 The above description is made by taking the weight of the vertical antenna port in the same polarization direction as an example, and is applied to the transmission case where the rank is equal to 1. The following describes the case of multi-column vertical antennas, different polarization directions in the same column, and multi-rank transmission. Example 3
  • the adjustment factor is the first phase shift factor
  • the first phase shift factor can be: Value can be arbitrary, for example, take The power of 2, such as 2, 4, 8, 16, 32, 64, etc., but may not be a power of 2.
  • the introduction of the first phase shift factor may cause the above formula (2) to have different representations.
  • the antenna port weight composed of two cross-polarization direction antennas in the same column may be represented as a single codebook structure. , such as Lu u ' eu ”; can also be expressed as a dual codebook structure, similar to the eight-antenna precoded dual codebook structure in LTE Release 10; for example,
  • the unit of dimension of 0 is listed as: 2.
  • the polarization directions of the antenna elements of each column may be the same or different.
  • the antenna port weighting may be determined by using the method described in Embodiment 2; for other column antennas, an adjustment factor may be multiplied by the weight of the first column antenna port as a whole; wherein, the adjustment The factor may be a second phase shift factor or a complex number, for example, the second phase shift factor or complex number may be an antenna port weight in the horizontal direction, such as a weight value of a current 2 antenna, 4 antenna or 8 antenna codebook that can be used by the LTE system. .
  • the antenna port weighting may be determined by using the method in the above “1” in the embodiment; for other column antennas, an adjustment factor may be obtained by multiplying the first column antenna port weighting by the whole.
  • the adjustment factor may be obtained by multiplying the second phase shift factor or the complex number by the first phase shift factor.
  • the adjustment factors used may be the same or different for the other column antennas other than the first column. 3. Perform multi-rank transmission, ie rank greater than 1:
  • the codebook set formed by the antenna port weights obtained when the rank is equal to 1 can be used to determine the codebook set formed by the antenna port weights when the rank is greater than 1.
  • the rank determined by the equation (11) of Embodiment 2 and/or the "1" and/or "2" of the present embodiment can be utilized.
  • the antenna port weighting codeword of 1 obtains a precoding codebook of rank 2 or more by a householder transform or an eight antenna precoding multi-rank transmission codeword determining method in LTE Rel-10.
  • Fig. 5 is a block diagram showing the structure of a codebook determining apparatus according to a fourth embodiment of the present invention.
  • the apparatus 500 includes: a codebook determining unit 501, which is configured to determine a first codebook set formed by antenna particle weighting, and/or a second codebook set formed by antenna port weighting.
  • the first codebook set and the second codebook set are determined by using equations (1) and (2) described in Embodiment 1, respectively.
  • the apparatus 500 may further include a notification unit 502, and the notification unit 502 is configured to notify the user equipment of the determined first codebook set and the second codebook set.
  • the specific notification manner is as described in Embodiment 1, and details are not described herein again.
  • the component notification unit 502 is an optional component.
  • the first codebook set and the second codebook set may be determined by the codebook determining unit 501, and the codebook set may be separately determined by different components, such that the codebook determining unit 501 may include And a first determining unit and a second determining unit (not shown), wherein the first determining unit is configured to determine the first codebook set; the second determining unit is configured to determine the second codebook set.
  • the specific determination method is as in Embodiment 1 and 3, the contents of which are incorporated herein, and will not be described again here.
  • the codebook set formed by the weight of the antenna particles determined by the device 500 and the codebook set formed by the weight of the antenna port are applicable to a two-dimensional planar antenna array having any number of antenna ports, such as one or one.
  • the above antenna port, one column of the same-polarized antenna configuration in the vertical direction, and the multi-column antenna array of the same column antenna particle with different polarization directions and vertical directions in the cross-polarized antenna configuration are also applicable to the transmission rank equal to 1 or greater than 1.
  • the fifth embodiment of the present invention provides a base station, where the base station includes the codebook determining apparatus according to the fourth embodiment, and the codebook set formed by the weighting of the antenna particles and the codebook set by the antenna port weighting.
  • the base station includes the codebook determining apparatus according to the fourth embodiment, and the codebook set formed by the weighting of the antenna particles and the codebook set by the antenna port weighting.
  • Fig. 6 is a block diagram showing the configuration of a base station according to a fifth embodiment of the present invention.
  • base station 600 can include: a central processing unit (CPU) 601 and memory 602; and memory 602 is coupled to central processing unit 601.
  • the memory 602 can store various data; further storing a program for determining the code book and the determined code book set, and executing the program under the control of the central processing unit 601 to determine the first codebook set formed by the antenna particle weighting, A second set of codebooks formed by antenna port weighting.
  • the functionality of the codebook determining device can be integrated into the central processor 601.
  • the central processing unit 601 can be configured to: determine a first codebook set formed by antenna particle weighting, and/or a second codebook set formed by weighting of an antenna port;
  • the formula (1) and the formula (2) of the first embodiment are used to determine the first codebook set by the antenna particle weighting, and/or the second codebook set formed by the antenna port weighting.
  • the adjustment factor is equal to 1; for the cross-polarized antenna configuration and the same column of antenna particles have different polarization directions, when the rank is equal to 1, the adjustment The factor "is the first phase shift factor.
  • the adjustment factor is a first adjustment factor; the other column antennas other than the first column antenna, the adjustment factor is a second adjustment factor, the second adjustment
  • the value of the factor is as described in Embodiment 3, and details are not described herein again.
  • the codebook set formed by the antenna port weighting when the rank is greater than 1 is determined by using the codebook set formed by the antenna port weighting when the rank determined by the second determining unit is equal to 1.
  • the size of the first codebook set by the antenna particle weighting and the codebook in the second codebook set by the antenna port weighting are the same or different.
  • the first codebook set formed by the weighting of the antenna particles and the size of the codebook in the second codebook set formed by the antenna port weighting and the index of the adopted codeword satisfy the following relationship: ⁇ /N or approximately equal.
  • the central processing unit 601 is configured to notify the user equipment of the determined first codebook set formed by the antenna particle weighting and the second codebook set formed by the antenna port weighting.
  • the codebook determining device may be configured separately from the central processing unit.
  • the codebook determining device may be configured as a chip connected to the central processing unit 601, and the codebook is implemented by the control of the central processing unit 601.
  • the function of the device is determined, such as the codebook determining device 605 shown in FIG.
  • the base station 600 may further include: a transceiver 603, an antenna 604, and the like; wherein the functions of the foregoing components are similar to the prior art, and details are not described herein again.
  • the base station 600 also does not have to include all the components shown in FIG. 6; in addition, the base station 600 may further include components not shown in FIG. 6, and reference may be made to the prior art.
  • Fig. 7 is a block diagram showing the configuration of a communication system according to a sixth embodiment of the present invention.
  • the communication system 700 includes a base station 701.
  • the base station 701 is configured to determine a first codebook set formed by antenna particle weighting, and a second codebook set formed by antenna port weighting.
  • the specific structure, function, and implementation of the second codebook set. Example 5 is similar and will not be described here.
  • the communication system 700 further includes a user equipment 702, configured to receive a first codebook set formed by weighting of antenna particles notified by the base station 701, and a second codebook set formed by weighting of antenna ports.
  • the user equipment can also store the received set of codebooks.
  • the user equipment can use the stored codebook set to perform information feedback, data or signal transmission, and the like.
  • FIG. 8 is a block diagram showing the structure of a user equipment according to Embodiment 7 of the present invention.
  • the user equipment 800 may include: a receiving unit 801 and a storage unit 802.
  • the receiving unit 801 is configured to receive a first codebook set and antenna port weighting formed by weighting antenna particles notified by the base station 701.
  • the second code book collection is configured to store the received set of codebooks.
  • Example 7
  • Step 901 A user equipment weights a first codebook set and/or an antenna port formed by using antenna particle weighting according to a predetermined antenna number of an antenna port and/or an antenna port number. Forming a second set of codebooks to determine antenna particle weighted information and/or antenna port weighted information;
  • Step 902 feedback the determined antenna particle weighting information and/or antenna port weighting information to the base station.
  • the number of antenna particles and the number of antenna ports M may be notified by the base station to the user equipment, where the user equipment may be configured or notified by any existing signaling or by newly established signaling, or may be semi-statically configured or notified.
  • the dynamic notification may also be pre-stored on the user equipment end; the foregoing codebook set may be determined by the base station, and the user equipment is notified and stored by the user equipment.
  • the method for determining the set of the foregoing codebooks by the base station is as described in Embodiment 3 of the embodiment, and the content thereof is incorporated herein, and details are not described herein again.
  • the antenna particle weighting information includes a first codeword index used by the antenna particle weighting, and the information indicating that the antenna port weighting includes a second codeword index used by the antenna port weighting, and is represented as “ 2 .
  • Step 901 includes:
  • the user equipment searches for a corresponding antenna particle weighted codebook set in the first codebook set formed by the antenna particle weight according to the number of antenna particles of each antenna port; and then, according to the estimated channel information, the searched codebook set. Determining, by the first codeword index, the antenna particle weighting fed back to the base station;
  • each codeword w in the codebook may be utilized according to the estimated channel information.
  • channel information H to do some operations, according to the pre-set criteria to select the most suitable codeword, such as the criteria can be 11 ⁇ ⁇ 11 ⁇ ⁇ or other, and then by polling all the codewords in the codebook to get the most Excellent ⁇ This determines the index corresponding to the optimal codeword.
  • Step 901 includes: the user The device may search for a codebook set corresponding to the number of antenna particles in the second codebook set formed by the antenna port weighting according to the predicted number of antenna particles used by each antenna port and the number of antenna ports M; Determining the second codeword index " 2 in the codebook set;
  • the method for determining the index of the second codeword may be similar to the method for determining the first codeword index, and is not described herein again.
  • the antenna particle weighted information is determined by the base station based on the location information of the user equipment, such as vertical direction angle information, etc., and the base station notifies the user equipment of the antenna particle weighting information.
  • Step 901 The user equipment searches for a corresponding antenna particle weighted codebook set in the first codebook set formed by the antenna particle weighting according to the predicted antenna particle number K of each antenna port; and learns according to the selected codebook set.
  • the size of the code book N ; the user equipment searches for the corresponding antenna port in the second codebook set formed by the antenna port weighting according to the predicted number of antenna particles ⁇ of each antenna port and the number of antenna ports M.
  • the user equipment and the base station store the first codebook set and the second codebook set. Therefore, the user equipment can learn the codebook according to the predicted number of antenna particles, or the number of antenna particles and the number of antenna ports M. Any information, including the size of the code book, N
  • the second codeword index can also be obtained by polling according to the antenna particle weighting.
  • Step 901 includes:
  • the user equipment searches for a corresponding antenna particle weighted codebook set in the first codebook set formed by the antenna particle weight according to the predicted number of antenna particles of each antenna port; the user equipment according to the predicted antenna of each antenna port Finding the corresponding antenna port weighted codebook set in the second codebook set formed by the antenna port weighting by the number of particles K and the number of antenna ports M;
  • the determined codebook set can feed back corresponding information to the base station when the two-dimensional planar antenna array of any antenna port is used.
  • FIG. 10 is a block diagram showing the construction of an information feedback apparatus according to Embodiment 8 of the present invention.
  • the apparatus 1000 includes: an information determining unit 1001 and a feedback unit 1002.
  • the information determining unit 1001 is configured to use antenna particle weighting according to the number of antenna particles and/or the number of antenna ports of the predicted antenna port.
  • a second codebook set formed by the first codebook set and/or antenna port weighting, determining antenna particle weighted information and/or antenna port weighted information fed back to the base station; and feedback unit 1002 for feeding back antenna particle weighting to the base station Information and/or antenna port weighting information.
  • the first codebook set formed by the antenna particle weighting and the second codebook set formed by the antenna port weighting are as shown in the formulas (1) and (2), and are not described herein again.
  • the antenna particle weighting information includes a first codeword index used by the antenna particle weighting; the antenna port weighting information includes a second codeword index used by the antenna port weighting.
  • the information determining unit 1001 includes a first searching unit and a first determining unit (not shown); wherein the first searching unit is configured to use the first code formed by weighting the antenna particles according to the number of antenna particles of each antenna port. Searching for a corresponding set of antenna particle weighted codebooks in the book set; the second determining unit is configured to determine, according to the estimated channel information, the first codeword used for weighting the antenna particles fed back to the base station in the searched codebook set Index
  • the antenna particle weighting information is not known in advance, and the antenna particle weighting information is determined by the base station according to the location information of the user equipment, such as vertical direction angle information, etc., and the antenna particle weighting information is determined;
  • the information determining unit 1001 includes: a second searching unit and a second determining unit (not shown); wherein the second searching unit is configured to use the number of antenna particles and the number of antenna ports M according to each antenna port that is predicted, Searching, in a second set of codebooks formed by antenna port weighting, a codebook set corresponding to the number of antenna particles; the second determining unit is configured to determine the second codeword index in the found codebook set. .
  • the antenna particle weighted information is determined by the base station based on the location information of the user equipment, such as vertical direction angle information, etc., and the base station notifies the user equipment of the antenna particle weighting information.
  • the information determining unit 1001 includes a third searching unit and a third determining unit (not shown); wherein the third searching unit is configured to perform antenna particle weighting according to the predicted number of antenna particles of each antenna port. Searching for a corresponding set of code-weighted codebooks in a set of codebooks; the user equipment searches for a corresponding second set of codebooks formed by antenna port weighting according to the predicted number of antenna particles per antenna port and the number of antenna ports M The antenna port weighted code book set; the third determining unit is configured to learn the size of the code book according to the selected code book set, obtain the size of the code book according to the selected code book set, and then according to the antenna particle obtained from the base station The weighted information and the size of the codebook, ⁇ determine the antenna port weighting information " 2 .
  • the apparatus 1000 may further include a receiving unit (not shown) for receiving the number of antenna particles configured by the base station, and/or the number of antenna ports, or receiving the base station determination. of The first codeword index. Further, the receiving unit can store the information in the storage unit 1003.
  • the information determining unit 1001 includes a fourth searching unit, a fourth determining unit, and a fifth determining unit (not shown);
  • the fourth searching unit is configured to search for a corresponding antenna particle weighted codebook set in the first codebook set formed by the antenna particle weight according to the predicted number of antenna particles of each antenna port; the user equipment according to each of the predicted The number of antenna particles of the antenna port and the number of antenna ports M are searched for the corresponding antenna port weighted codebook set in the second codebook set formed by the antenna port weighting;
  • the fourth determining unit is configured to learn the size of the code book according to the selected codebook set, and determine, according to the estimated channel information, the first codeword index used to weight the antenna particles fed back to the base station in the searched codebook set.
  • the codebook set determined by the embodiment of the present invention can feed back corresponding information to the base station when the two-dimensional planar antenna array of any antenna port is used.
  • the embodiment of the present invention further provides a user equipment, which includes the information feedback device described in Embodiment 9, and the configuration and functions thereof are as described in Embodiment 8, and details are not described herein again.
  • Figure 11 is a block diagram showing the structure of a user equipment according to Embodiment 9 of the present invention.
  • the user equipment 1100 includes: a central processing unit 1101 and a memory 1105; and a memory 1105 coupled to the central processing unit 1101.
  • the figure is exemplary; other types of structures may be used in addition to or in place of the structure to implement telecommunications functions or other functions.
  • the functionality of the information feedback device can be integrated into the central processor 1101.
  • the central processing unit 1101 may be configured to: use the first codebook set and/or the antenna port weighting formed by the antenna particle weight according to the number of antenna particles of the predicted antenna port and/or the number of antenna ports.
  • the codebook set determines antenna particle weighting information and/or antenna port weighting information fed back to the base station; and feeds back antenna particle weighting information and/or antenna port weighting information to the base station.
  • the information feedback device may be configured separately from the central processing unit 1101.
  • the information feedback device may be configured as a chip connected to the central processing unit 1101, and the function of the information feedback device is implemented by control of the central processing unit.
  • the user equipment 1100 may further include: an input unit 1103, an audio processing unit 1104, a display 1106, a power supply 1107, and a communication module 1108. It is noted that the user equipment 1100 is not necessarily included in FIG. All of the components shown; in addition, the user device 1100 may also include components not shown in FIG. 11, and reference may be made to the prior art.
  • central processor 1101 which is sometimes also referred to as a controller or operational control, may include a microprocessor or other processor device and/or logic device that receives input and controls each of user devices 1100. The operation of the part.
  • the memory 1140 may be, for example, one or more of a buffer, a flash memory, a hard drive, a removable medium, a volatile memory, a non-volatile memory, or other suitable device.
  • the above-mentioned information related to the failure can be stored, and a program for performing feedback on the information can be stored.
  • the central processing unit 1101 can execute the program stored by the memory 1105 to implement information storage or processing and the like.
  • the functions of other components are similar to those of the existing ones and will not be described here.
  • the various components of user equipment 1100 may be implemented by special purpose hardware, firmware, software or a combination thereof without departing from the scope of the invention.
  • Embodiment 10 of the present invention also provides a communication system.
  • the communication system includes a user equipment and a base station; wherein the user equipment weights according to the number of antenna particles of the predicted antenna port and/or the number of antenna ports M, the first codebook set and/or the antenna port weighted by the antenna particle weighting
  • the second set of codebooks is configured to feed back information of antenna particle weighting and/or antenna port weighting information to the base station.
  • the base station is configured to determine a first codebook set formed by weighting the antenna particles and/or an antenna port weight by using a phase shift vector caused by the position of the antenna particles in the two-dimensional planar antenna array.
  • the second codebook set wherein, the formulas (1) and (2) can be determined, as described in the embodiments 1 to 3, and are not described herein again.
  • FIG. 12 is a schematic structural diagram of an information feedback apparatus according to Embodiment 10 of the present invention.
  • the information feedback apparatus 1200 includes: an information receiving unit 1201, and the information receiving unit 1201 is configured to receive Antenna particle weighted information and/or antenna port weighted information fed back by the user equipment.
  • the information feedback apparatus 1200 may further include a codebook determining unit 1202, where the codebook determining unit 1202 is configured to determine a first codebook set and/or an antenna port weighting formed by antenna particle weighting.
  • the specific method for determining the second set of codebooks is as shown in Embodiment 1-3, and details are not described herein again.
  • the component codebook determining unit 1202 is an optional component, and the present embodiment can also predetermine the codebook set and store it in the storage unit.
  • the information feedback apparatus 1200 may further include a storage unit 1203 for storing information received by the information receiving unit 1201 and a codebook set determined by the codebook determining unit 1202.
  • the information feedback device 1200 may further include an information configuration unit 1204 and an information sending unit 1205.
  • the information configuration unit 1204 is configured to configure the number of antenna particles used by each antenna port and/or Or the number of antenna ports; the information sending unit 1205 is configured to notify the user equipment of the configured number of antenna particles. In this way, after obtaining the number of the antenna particles, the user equipment can search for the corresponding codebook according to the information, and finally select the weight information of the antenna port.
  • the component information configuration unit 1204 and the information transmitting unit 1205 are optional components.
  • the information feedback apparatus 1200 may further include an information determining unit 1205, configured to determine antenna particle weighting information according to location information of the user equipment, and the information transmitting unit 1205 determines the determined antenna particle.
  • the weighted information informs the user device.
  • the user equipment can directly determine the information of the antenna port weighting according to the information of the antenna particle weighting.
  • the antenna particle weighting information is as described in Embodiments 7, 8 and the component is an optional component.
  • a base station is further provided, where the base station includes the information feedback device of FIG. 12, and is configured to receive antenna particle weighting information and/or antenna port weighting information fed back by the user equipment.
  • the base station determines antenna particle weighting and/or antenna port weighting based on the above information, and applies antenna particle weighting and/or antenna port weighting to the precoding operation in information transmission to the user equipment.
  • FIG. 13 is a schematic structural diagram of a base station in this embodiment.
  • the base station 1300 includes the above information feedback means.
  • base station 1300 can include: a central processing unit (CPU) 1301 and a memory 1302; and a memory 1302 coupled to central processing unit 1301.
  • the memory 1302 can store various data; further storing a program for information feedback, and/or a codebook determined program and a determined codebook set, and also storing the received information; executing the control under the control of the central processing unit 1301
  • the program receives information fed back by the user equipment.
  • the functionality of the information feedback device can be integrated into the central processor 1301. Its The central processing unit 1201 may be configured to: receive antenna particle weighting information and/or antenna port weighting information fed back by the user equipment.
  • the central processing unit 1301 is configured to: determine a codebook set formed by antenna chip weighting and/or an antenna port weighting, and the specific determining method is as shown in Embodiment 1-3. Narration.
  • the central processing unit 1301 is configured to: configure the number of antenna particles used by each antenna port; notify the user equipment of the number of configured antenna particles.
  • the central processing unit 1301 is configured to: determine antenna particle weighted information based on location information of the user equipment, and notify the user equipment of the determined antenna particle weighting information.
  • the information feedback device 1304 can be configured separately from the central processing unit 1301.
  • the information feedback device can be configured as a chip connected to the central processing unit 1301, and the information feedback device can be implemented by the control of the central processing unit 1301. The function is as shown in FIG. 13 by the information feedback device 1305.
  • the base station 1300 may further include: a transceiver 1303, an antenna 1304, and the like; wherein the functions of the foregoing components are similar to the prior art, and details are not described herein again. It should be noted that the base station 1300 does not have to include all the components shown in FIG. 13; in addition, the base station 1300 may further include components not shown in FIG. 13, and reference may be made to the prior art.
  • the user equipment is also used to perform antenna particle weighting in the frequency domain when transmitting data channels, and/or common channels or signals. Therefore, based on the above embodiment, the user equipment further includes an information processing unit (not shown) for performing antenna particle weighting in the frequency domain when transmitting the data channel, and/or the common channel or signal.
  • an information processing unit not shown
  • antenna elements used by different user equipments are weighted differently, so that each user equipment can adaptively adjust the pointing of the vertical direction beam.
  • a common channel or signal such as a physical broadcast channel (PBCH), a physical downlink control channel (PDCCH), a physical downlink data channel (PDSCH) that does not use demodulation reference signal (DMRS) demodulation, a cell-specific reference signal (CRS)
  • PBCH physical broadcast channel
  • PDCCH physical downlink control channel
  • PDSCH physical downlink data channel
  • DMRS demodulation reference signal
  • CRS cell-specific reference signal
  • the following antenna particle weighting vector or the following antenna particle weighting vector weighting can be used.
  • the vector formed by cyclic shifting of the values performs antenna particle weighting; the values are the same as before, and are the number of antenna particles in one antenna port, that is, the dimension of the antenna particle weight vector.
  • the vector is:
  • 6 is the number of 1s in the weight vector, and 6 is A positive integer that can be divisible.
  • the antenna particle weighting vector is or ; l/V2 [l, 0, 0, - - -, 0,1,0,0, ⁇ ⁇ ⁇ ,, Of
  • the antenna particle weight vector is ;
  • the antenna particle weight vector is ⁇ , ⁇ ,...
  • the embodiment of the present invention further provides a computer readable program, wherein the program causes a computer to execute Embodiments 1 to 3 in the codebook determining apparatus or a base station when the program is executed in a codebook determining apparatus or a base station The codebook determination method.
  • the embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes the computer to execute the codebook determining method described in Embodiments 1 to 3 in a codebook determining device or a base station.
  • the embodiment of the present invention further provides a computer readable program, wherein when the program is executed in an information device or a user equipment, the program causes the computer to execute the method described in Embodiment 7 in the information feedback device or the user equipment.
  • Information feedback method when the program is executed in an information device or a user equipment, the program causes the computer to execute the method described in Embodiment 7 in the information feedback device or the user equipment.
  • the embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes the computer to execute the information feedback method described in Embodiment 7 in the information feedback device or the user equipment.
  • the above apparatus and method of the present invention may be implemented by hardware, or may be implemented by hardware in combination with software.
  • the present invention relates to a computer readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to cause the logic component to implement the various methods described above Or steps.
  • Logic components such as field programmable logic components, microprocessors, processors used in computers, and the like.
  • the present invention also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, or the like.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Radio Transmission System (AREA)

Abstract

L'invention concerne un dispositif de détermination de tables de codes, une station de base et un système de communication, le dispositif de détermination de tables de codes comprenant une unité de détermination de tables de codes utilisée pour déterminer un premier ensemble de tables de codes formé par pondération de particules d'antenne et/ou un second ensemble de tables de codes formé par pondération de ports d'antenne ; ladite unité de détermination utilisant les formules (1) et (2) afin de déterminer le premier ensemble de tables de codes et le second ensemble de tables de codes. Les tables de codes déterminés par le mode de réalisation de la présente invention sont appropriés pour un réseau d'antennes plan bidimensionnel ayant un nombre quelconque de ports d'antenne contenant K particules de port d'antenne.
PCT/CN2014/074457 2014-03-31 2014-03-31 Dispositif de détermination de tables de codes, dispositif de renvoi d'informations et système de communication WO2015149250A1 (fr)

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CN201480065359.5A CN105794041B (zh) 2014-03-31 2014-03-31 码书确定装置、信息反馈装置和通信系统
PCT/CN2014/074457 WO2015149250A1 (fr) 2014-03-31 2014-03-31 Dispositif de détermination de tables de codes, dispositif de renvoi d'informations et système de communication

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102412885A (zh) * 2011-11-25 2012-04-11 西安电子科技大学 Lte中的三维波束赋形方法
WO2013024853A1 (fr) * 2011-08-15 2013-02-21 株式会社エヌ・ティ・ティ・ドコモ Système de communication sans fil, dispositif station de base sans fil, terminal utilisateur et procédé de communication sans fil
CN103684657A (zh) * 2012-09-03 2014-03-26 夏普株式会社 预编码矩阵构造和索引值反馈方法及相关通信设备

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20080073624A (ko) * 2007-02-06 2008-08-11 삼성전자주식회사 다중 편파 다중 입출력 시스템을 위한 코드북 생성 방법 및그 장치
CN102461000B (zh) * 2009-04-28 2015-04-08 诺基亚公司 信道状态信息反馈的方法及设备
KR101817724B1 (ko) * 2010-04-30 2018-02-21 삼성전자주식회사 각 리포팅 모드에 대응하는 코드북을 사용하는 다중 입출력 통신 시스템
US8509338B2 (en) * 2010-05-05 2013-08-13 Motorola Mobility Llc Method and precoder information feedback in multi-antenna wireless communication systems
CN103220090B (zh) * 2012-01-19 2017-03-22 中国移动通信集团公司 码本反馈方法及信号接收装置、信号发送方法及装置
CN103220026B (zh) * 2012-01-19 2016-06-29 中国移动通信集团公司 码本反馈方法及信号接收装置、信号发送方法及装置
CN103780347B (zh) * 2014-01-23 2016-10-26 东南大学 一种基于3d-mimo码本设计的多用户调度传输方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013024853A1 (fr) * 2011-08-15 2013-02-21 株式会社エヌ・ティ・ティ・ドコモ Système de communication sans fil, dispositif station de base sans fil, terminal utilisateur et procédé de communication sans fil
CN102412885A (zh) * 2011-11-25 2012-04-11 西安电子科技大学 Lte中的三维波束赋形方法
CN103684657A (zh) * 2012-09-03 2014-03-26 夏普株式会社 预编码矩阵构造和索引值反馈方法及相关通信设备

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
HUAWEI: "Discussion on 3D antenna model with 2D antenna array", 3GPP TSG RAN WG1 MEETING #72 RL-130026, 1 February 2014 (2014-02-01), XP050663507 *
LG ELECTRONICS: "Antenna modeling for 3D channel studies", 3GPP TSG RAN WG1 MEETING #73 RL-132243, 24 May 2014 (2014-05-24), XP050698015 *

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