WO2019095970A1 - 一种用户设备、接入设备和预编码方法 - Google Patents

一种用户设备、接入设备和预编码方法 Download PDF

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Publication number
WO2019095970A1
WO2019095970A1 PCT/CN2018/112259 CN2018112259W WO2019095970A1 WO 2019095970 A1 WO2019095970 A1 WO 2019095970A1 CN 2018112259 W CN2018112259 W CN 2018112259W WO 2019095970 A1 WO2019095970 A1 WO 2019095970A1
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Prior art keywords
precoding
vectors
type
vector
precoding vectors
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PCT/CN2018/112259
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English (en)
French (fr)
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王潇涵
金黄平
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华为技术有限公司
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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path

Definitions

  • the embodiments of the present invention relate to a precoding technology, and in particular, to a user equipment, an access device, and a precoding method.
  • MIMO Multiple Input Multiple Output
  • precoding treats the transmitted signal by means of a precoding matrix that matches the channel properties, so that the precoded signal to be transmitted is adapted to the channel, so the transmission process is optimized and received.
  • Signal quality eg SINR
  • precoding techniques have been adopted by a variety of wireless communication standards, such as, but not limited to, LTE.
  • the precoding matrix usually includes at least one column vector, which may be referred to as a precoding vector, and each column vector is used to precode a layer, which may also be referred to as a data layer or a spatial stream.
  • the codebook is usually a set of candidate matrices, wherein the candidate matrices that best match the channel can be selected as the precoding matrix.
  • the candidate matrix that best matches the channel may be determined based on various principles such as, but not limited to, maximizing channel capacity, maximizing channel throughput, or closest to an ideal precoding matrix, where the above ideal is determined.
  • the precoding matrix may be a conjugate transposed matrix of a right ⁇ matrix obtained by performing a Singular Value Decomposition (SVD) on the channel matrix, and the column vector of the conjugate transposed matrix may be referred to as an ideal precoding vector.
  • Singular Value Decomposition Singular Value Decomposition
  • the actual effect of performing precoding usually depends on the degree of matching between the precoding matrix and the channel.
  • the more the precoding matrix matches the channel the better the actual effect of performing precoding.
  • the beam selection method selects a candidate matrix as a precoding matrix in the codebook. Therefore, the more candidate matrices in the codebook, the more channels that can be matched.
  • the capacity of existing codebooks is usually very limited, and the purpose is to reduce the complexity of the specific implementation process, such as, but not limited to, determining the computational complexity in the precoding matrix process.
  • the limitation of the codebook capacity necessarily affects the degree of matching between the precoding matrix and the channel.
  • the limited codebook is not sufficient to match a variety of channels, and the actual effect of precoding is very limited.
  • the prior art introduces a beam combination technique to determine a precoding matrix.
  • the beam combining technique constructs a precoding vector by selecting a plurality of candidate vectors as component vectors in the codebook for weighted combination.
  • a codebook is typically a collection of candidate vectors, where a plurality of candidate vectors that best match the channel can be selected as component vectors. For example, the candidate vector in the codebook that is closest to the ideal precoding vector can be selected as the component vector.
  • the beam combining technique can improve the accuracy of the precoding vector, it also increases the overhead caused by indicating the precoding vector.
  • the beam combining technique when indicating a precoding vector, it is necessary to indicate not only a plurality of component vectors constructing the precoding vector but also weighting coefficients of the component vectors.
  • the precoding matrix contains multiple precoding vectors, or when multiple narrowband precoding vectors need to be fed back, the overhead incurred will become larger.
  • an access device which helps to effectively limit the overhead caused by indicating the precoding vector while improving the accuracy of the precoding vector.
  • a precoding method which helps to effectively limit the overhead caused by indicating the precoding vector while improving the precision of the precoding vector.
  • a user equipment including:
  • a processing module configured to generate indication information
  • the indication information is used to indicate a plurality of precoding vectors, where the plurality of precoding vectors comprise j first class precoding vectors and k second class precoding vectors, where j ⁇ 1, k ⁇ 1, each First type of precoding vector Expressed as:
  • Second class precoding vector Phase parameter 1 ⁇ n ⁇ k
  • the indication information is used to indicate a plurality of precoding vectors, where the plurality of precoding vectors include j first type precoding vectors and k groups second type precoding vectors, where j ⁇ 1, k ⁇ 1, each First type of precoding vector Expressed as:
  • each set of second type precoding vectors contains v second type precoding vectors, each of the second type of precoding vectors of the group Second type of precoding vector Expressed as:
  • Second class precoding vector Used to construct a second type of precoding vector Component vector, Second class precoding vector
  • the phase parameter, 1 ⁇ n ⁇ v, v ⁇ 1; the transceiver module is configured to send the indication information.
  • an access device including:
  • a transceiver module configured to receive indication information
  • the indication information is used to indicate a plurality of precoding vectors, where the plurality of precoding vectors comprise j first class precoding vectors and k second class precoding vectors, where j ⁇ 1, k ⁇ 1, each First type of precoding vector Expressed as:
  • Second class precoding vector Phase parameter 1 ⁇ n ⁇ k
  • the indication information is used to indicate a plurality of precoding vectors, where the plurality of precoding vectors include j first type precoding vectors and k groups second type precoding vectors, where j ⁇ 1, k ⁇ 1, each First type of precoding vector Expressed as:
  • each set of second type precoding vectors contains v second type precoding vectors, each of the second type of precoding vectors of the group Second type of precoding vector Expressed as:
  • Second class precoding vector Phase parameter 1 ⁇ n ⁇ v, v ⁇ 1;
  • a processing module configured to determine the multiple precoding vectors according to the indication information.
  • a precoding method including:
  • the indication information is used to indicate a plurality of precoding vectors, where the plurality of precoding vectors comprise j first class precoding vectors and k second class precoding vectors, where j ⁇ 1, k ⁇ 1, each First type of precoding vector Expressed as:
  • Second class precoding vector Phase parameter 1 ⁇ n ⁇ k
  • the indication information is used to indicate a plurality of precoding vectors, where the plurality of precoding vectors include j first type precoding vectors and k groups second type precoding vectors, where j ⁇ 1, k ⁇ 1, each First type of precoding vector Expressed as:
  • each set of second type precoding vectors contains v second type precoding vectors, each of the second type of precoding vectors of the group Second type of precoding vector Expressed as:
  • Second class precoding vector Phase parameter 1 ⁇ n ⁇ v, v ⁇ 1;
  • a precoding method including:
  • the indication information is used to indicate a plurality of precoding vectors, where the plurality of precoding vectors comprise j first class precoding vectors and k second class precoding vectors, where j ⁇ 1, k ⁇ 1, each First type of precoding vector Expressed as:
  • Second class precoding vector Phase parameter 1 ⁇ n ⁇ k
  • the indication information is used to indicate a plurality of precoding vectors, where the plurality of precoding vectors include j first type precoding vectors and k groups second type precoding vectors, where j ⁇ 1, k ⁇ 1, each First type of precoding vector Expressed as:
  • each set of second type precoding vectors contains v second type precoding vectors, each of the second type of precoding vectors of the group Second type of precoding vector Expressed as:
  • Second class precoding vector Phase parameter 1 ⁇ n ⁇ v, v ⁇ 1;
  • a user equipment including:
  • a processor configured to generate indication information, wherein
  • the indication information is used to indicate a plurality of precoding vectors, where the plurality of precoding vectors comprise j first class precoding vectors and k second class precoding vectors, where j ⁇ 1, k ⁇ 1, each First type of precoding vector Expressed as:
  • Second class precoding vector Phase parameter 1 ⁇ n ⁇ k
  • the indication information is used to indicate a plurality of precoding vectors, where the plurality of precoding vectors include j first type precoding vectors and k groups second type precoding vectors, where j ⁇ 1, k ⁇ 1, each First type of precoding vector Expressed as:
  • each set of second type precoding vectors contains v second type precoding vectors, each of the second type of precoding vectors of the group Second type of precoding vector Expressed as:
  • Second class precoding vector Phase parameter 1 ⁇ n ⁇ v, v ⁇ 1;
  • a transceiver configured to send the indication information.
  • an access device including:
  • the indication information is used to indicate a plurality of precoding vectors, where the plurality of precoding vectors comprise j first class precoding vectors and k second class precoding vectors, where j ⁇ 1, k ⁇ 1, each First type of precoding vector Expressed as:
  • Second class precoding vector Phase parameter 1 ⁇ n ⁇ k
  • the indication information is used to indicate a plurality of precoding vectors, where the plurality of precoding vectors include j first type precoding vectors and k groups second type precoding vectors, where j ⁇ 1, k ⁇ 1, each First type of precoding vector Expressed as:
  • each set of second type precoding vectors contains v second type precoding vectors, each of the second type of precoding vectors of the group Second type of precoding vector Expressed as:
  • Second class precoding vector Phase parameter 1 ⁇ n ⁇ v, v ⁇ 1;
  • a processor configured to determine the multiple precoding vectors according to the indication information.
  • the processor can be used to perform, for example, without limitation, baseband related processing, and the transceiver can be used to perform, for example, without limitation, radio frequency transceiving.
  • the above devices may be respectively disposed on chips independent of each other, or may be disposed at least partially or entirely on the same chip.
  • the transceiver may be disposed on the transceiver chip.
  • the processor can be further divided into an analog baseband processor and a digital baseband processor, wherein the analog baseband processor can be integrated on the same chip as the transceiver, and the digital baseband processor can be disposed on a separate chip. With the continuous development of integrated circuit technology, more and more devices can be integrated on the same chip.
  • a digital baseband processor can be combined with a variety of application processors (such as but not limited to graphics processors, multimedia processors, etc.) Integrated on the same chip.
  • application processors such as but not limited to graphics processors, multimedia processors, etc.
  • Such a chip can be referred to as a system on chip. Separate devices on different chips or integrated on one or more chips often depends on the specific needs of the product design. The specific implementation form of the above device is not limited in the embodiment of the present invention.
  • a user equipment including:
  • a processing module configured to generate indication information, where the indication information is used to indicate the quantity used, when the plurality of precoding vectors that need to be fed back include the first type of precoding vector and the second type of precoding, The number of first type of precoding vectors in the plurality of precoding vectors;
  • transceiver module configured to send the indication information.
  • an access device including:
  • a transceiver module configured to receive indication information, where the indication information is used to indicate the quantity used, when the plurality of precoding vectors that need to be fed back include the first type of precoding vector and the second type of precoding, The number of first type of precoding vectors in the plurality of precoding vectors;
  • a processing module configured to determine the quantity according to the indication information.
  • an indication method including:
  • the user equipment generates indication information, where the indication information is used to indicate the quantity used, when the plurality of precoding vectors that need to be fed back include the first type of precoding vector and the second type of precoding, the foregoing multiple pre The number of first type of precoding vectors in the coding vector;
  • the user equipment sends the indication information.
  • an indication method including:
  • the access device receives the indication information, where the indication information is used to indicate the quantity used, when the plurality of precoding vectors that need to be fed back include the first type of precoding vector and the second type of precoding, the multiple The number of first type of precoding vectors in the precoding vector;
  • the access device determines the quantity according to the indication information.
  • an access device including:
  • a processing module configured to generate indication information, where the indication information is used to indicate the quantity used, when the plurality of precoding vectors that need to be fed back include the first type of precoding vector and the second type of precoding, The number of first type of precoding vectors in the plurality of precoding vectors;
  • transceiver module configured to send the indication information.
  • a user equipment including:
  • a transceiver module configured to receive indication information, where the indication information is used to indicate the quantity used, when the plurality of precoding vectors that need to be fed back include the first type of precoding vector and the second type of precoding, The number of first type of precoding vectors in the plurality of precoding vectors;
  • a processing module configured to determine the quantity according to the indication information.
  • an indication method including:
  • the access device generates indication information, where the indication information is used to indicate the quantity used, when the plurality of precoding vectors that need to be fed back include the first type of precoding vector and the second type of precoding, the multiple The number of first type of precoding vectors in the precoding vector;
  • the access device sends the indication information.
  • an indication method including:
  • the user equipment receives the indication information, where the indication information is used to indicate the quantity used, when the plurality of precoding vectors that need to be fed back include the first type of precoding vector and the second type of precoding, the foregoing multiple pre The number of first type of precoding vectors in the coding vector;
  • the user equipment determines the quantity according to the indication information.
  • a user equipment including:
  • a processing module configured to generate configuration information, where the configuration information is used to configure multiple quantities, where each quantity is, when multiple precoding vectors that need to be fed back include a first type of precoding vector and a second type of precoding, The number of first type of precoding vectors in the plurality of precoding vectors;
  • a transceiver module for transmitting configuration information.
  • an access device including:
  • a transceiver module configured to receive configuration information, where the configuration information is used to configure multiple quantities, where each quantity is, when multiple precoding vectors that need to be fed back include a first type of precoding vector and a second type of precoding, The number of first type of precoding vectors in the plurality of precoding vectors;
  • a processing module configured to configure multiple quantities according to the configuration information.
  • a configuration method including:
  • the user equipment generates configuration information, where the configuration information is used to configure multiple quantities, each quantity being, when the plurality of precoding vectors that need to be fed back include the first type of precoding vector and the second type of precoding, the foregoing multiple pre The number of first type of precoding vectors in the coding vector;
  • the user equipment sends configuration information.
  • a configuration method including:
  • the access device receives configuration information, where the configuration information is used to configure multiple quantities, each quantity being, when the multiple precoding vectors that need to be fed back include the first type of precoding vector and the second type of precoding, the multiple The number of first type of precoding vectors in the precoding vector;
  • the access device configures a plurality of quantities according to the configuration information.
  • an access device including:
  • a processing module configured to generate configuration information, where the configuration information is used to configure multiple quantities, where each quantity is, when multiple precoding vectors that need to be fed back include a first type of precoding vector and a second type of precoding, The number of first type of precoding vectors in the plurality of precoding vectors;
  • a transceiver module for transmitting configuration information.
  • a user equipment including:
  • a transceiver module configured to receive configuration information, where the configuration information is used to configure multiple quantities, where each quantity is, when multiple precoding vectors that need to be fed back include a first type of precoding vector and a second type of precoding, The number of first type of precoding vectors in the plurality of precoding vectors;
  • a processing module configured to configure multiple quantities according to the configuration information.
  • a configuration method including:
  • the access device generates configuration information, where the configuration information is used to configure multiple quantities, each quantity being, when the plurality of precoding vectors that need to be fed back include the first type of precoding vector and the second type of precoding, the multiple The number of first type of precoding vectors in the precoding vector;
  • the access device sends configuration information.
  • a configuration method including:
  • the user equipment receives configuration information, where the configuration information is used to configure multiple quantities, each quantity being, when the plurality of precoding vectors that need to be fed back include the first type of precoding vector and the second type of precoding, the foregoing multiple pre The number of first type of precoding vectors in the coding vector;
  • the user equipment configures a plurality of quantities according to the configuration information.
  • a processor for performing the various methods described above.
  • the process of transmitting the above information and receiving the above information in the above method may be understood as a process of outputting the above information by the processor, and a process of receiving the input information by the processor.
  • the processor when outputting the above information, the processor outputs the above information to the transceiver for transmission by the transceiver. Further, after the above information is output by the processor, other processing may be required before reaching the transceiver.
  • the processor receives the above input information
  • the transceiver receives the above information and inputs it to the processor. Further, after the transceiver receives the above information, the above information may need to be processed before being input to the processor.
  • receiving the indication information mentioned in the foregoing method may be understood as the indication information that the processor receives the input.
  • transmitting the indication information may be understood as the processor outputting the indication information.
  • the foregoing processor may be a processor dedicated to executing the methods, or may be a processor executing computer instructions in the memory to execute the methods, such as a general-purpose processor, in this case, a processor and a memory. It is attributed to a communication device, for example included in the communication device.
  • the above memory may be a non-transitory memory, such as a read only memory (ROM), which may be integrated on the same chip as the processor, or may be separately disposed on different chips.
  • ROM read only memory
  • the embodiment does not limit the type of the memory and the manner in which the memory and the processor are arranged.
  • a computer readable storage medium comprising instructions which, when executed on a computer, cause the computer to perform any of the methods described above.
  • the computer readable storage medium described above is non-transitory.
  • a computer program product comprising instructions which, when run on a computer, cause the computer to perform any of the methods described above.
  • each of the second types of precoding vectors are orthogonal to each other and any of the second type of precoding vectors and any of the first types of precoding The vectors are orthogonal to each other.
  • the component vector with Each is selected from the same set of vectors in which any two vectors are orthogonal to each other.
  • the indication information when the indication information is used to indicate a plurality of precoding vectors and the plurality of precoding vectors comprise j first class precoding vectors and k second classes When precoding a vector, the indication information is used to indicate a component vector Phase parameter And superposition coefficients ⁇ m,i,r ;
  • the indication information is used to indicate a plurality of precoding vectors and the plurality of precoding vectors include j first type precoding vectors and k groups of second type precoding vectors
  • the indication information is specifically used to indicate components.
  • vector The superposition coefficients ⁇ m, i, r and k are the second type of precoding vectors.
  • precoding vectors of partial layers may be constructed according to beam combining techniques, and precoding vectors of other layers may be constructed according to beam selection techniques.
  • the technical solution provided by the embodiment of the present invention helps to effectively limit the overhead caused by indicating the precoding vector while improving the accuracy of the precoding vector.
  • FIG. 1 is an exemplary schematic diagram of a wireless communication network in accordance with an embodiment of the present invention
  • FIG. 2 is a schematic diagram showing an exemplary logical structure of a user equipment according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram showing an exemplary logical structure of an access device according to an embodiment of the invention.
  • FIG. 4 is a schematic diagram showing an exemplary hardware structure of a communication device according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of an exemplary interaction process of a precoding method in accordance with an embodiment of the present invention.
  • the beam combining technique can improve the accuracy of the precoding vector, but also greatly increases the indication overhead.
  • the beam selection technique only reports the index of the selected candidate matrix when indicating the precoding matrix, which can greatly reduce the indication overhead, but the precision of the precoding matrix is not high.
  • next-generation wireless communication system currently under development is also known as the New Radio (NR) system or the 5G system.
  • NR New Radio
  • 5G 5th Generation
  • a beam combining technique is used to determine the precoding vector.
  • beam selection techniques are used to determine the precoding matrix. Therefore, for example, when the number of layers is 2, the precoding vectors of each layer will be constructed according to the beam combining technique; when the number of layers is 3, the precoding including 3 precoding vectors will be selected according to the beam selection technique. Encoding matrix.
  • the embodiment of the present invention provides a technical solution for constructing precoding vectors of partial layers according to beam combining techniques for multiple layers simultaneously transmitted, and constructing precoding vectors of other layers according to beam selection techniques.
  • the transmission process of the above layer will use two precoding techniques at the same time, so that the respective advantages of the two precoding techniques can be fully utilized.
  • the technical solution provided by the embodiment of the present invention helps to effectively limit the overhead caused by indicating the precoding vector while improving the precision of the precoding vector.
  • the technical solutions provided by the embodiments of the present invention are described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, for convenience of description, the technical solution to be described below is described by taking a feedback downlink precoding vector as an example.
  • the user equipment receives the reference signal sent by the access device, determines and indicates the precoding vector to the access device. It should be understood by those skilled in the art after reading the technical solutions described below that the technical solution provided by the embodiments of the present invention is also applicable to the feedback uplink precoding vector.
  • the access device receives the reference signal sent by the user equipment, determines and indicates the precoding vector to the user equipment.
  • the wireless communication network 100 includes base stations 102-106 and terminal devices 108-122, wherein the base stations 102-106 can pass backhaul links with each other (e.g., lines between base stations 102-106) Communication is shown, which may be a wired backhaul link (eg, fiber optic, copper) or a wireless backhaul link (eg, microwave).
  • the terminal devices 108-122 can communicate with the corresponding base stations 102-106 via a wireless link (as indicated by the broken line between the base stations 102-106 and the terminal devices 108-122).
  • the base stations 102-106 typically serve as access devices to provide wireless access services for the terminal devices 108-122 that are typically user equipment.
  • each base station corresponds to a service coverage area (also referred to as a cell, as shown in each ellipse area in FIG. 1), and the terminal device entering the area can communicate with the base station by using a wireless signal to receive the base station.
  • Wireless access service provided.
  • multiple base stations may use Coordinated Multipoint (CoMP) technology to provide services for terminal devices in the overlapping area.
  • CoMP Coordinated Multipoint
  • the base station 102 overlaps with the service coverage area of the base station 104, and the terminal device 112 is within the overlapping area, so the terminal device 112 can receive the wireless signals from the base station 102 and the base station 104.
  • the base station 102 and the base station 104 can cooperate with each other to provide services to the terminal device 112.
  • the service coverage areas of the base station 102, the base station 104, and the base station 106 have a common overlapping area, and the terminal device 120 is within the overlapping area, so the terminal device 120 can receive the base station.
  • the wireless signals 102, 104, and 106, the base stations 102, 104, and 106 can cooperate with each other to provide services to the terminal device 120.
  • the base station may be referred to as a Node B (NodeB), an evolved Node B (eNodeB), and an Access Point (AP), etc., depending on the wireless communication technology used.
  • NodeB Node B
  • eNodeB evolved Node B
  • AP Access Point
  • the base station can be further divided into a macro base station for providing a macro cell, a micro base station for providing a pico cell, and a femtocell for providing Femto cell) Femto base station, etc.
  • future base stations may use other names.
  • the terminal devices 108-122 may be various wireless communication devices having wireless communication functions, such as but not limited to mobile cellular phones, cordless phones, personal digital assistants (PDAs), smart phones, notebook computers, tablets, wireless devices.
  • a data card a modem (Modulator demodulator, Modem), or a wearable device such as a smart watch.
  • IOT Internet of Things
  • V2X vehicle-to-everything
  • Such devices have wireless communication functions because they are equipped with wireless communication units, and therefore belong to the category of wireless communication devices.
  • the terminal devices 108-122 may also be referred to as mobile stations, mobile devices, mobile terminals, wireless terminals, handheld devices, clients, and the like.
  • the base stations 102-106 and the terminal devices 108-122 can be configured with multiple antennas to support MIMO (Multiple Input Multiple Output) technology. Further, the base stations 102-106 and the terminal devices 108-122 can support single-user MIMO (SU-MIMO) technology or multi-user MIMO (Multi-User MIMO, MU-MIMO). MU-MIMO can be implemented based on Space Division Multiple Access (SDMA) technology. Due to the configuration of multiple antennas, the base stations 102-106 and the terminal devices 108-122 can also flexibly support Single Input Single Output (SISO) technology, Single Input Multiple Output (SIMO) and multiple input.
  • SISO Single Input Single Output
  • SIMO Single Input Multiple Output
  • the multiplexing technology can be a spatial multiplexing (Spatial Multiplexing) technology.
  • the transmit diversity technology may include: Space-Time Transmit Diversity (STTD), Space-Frequency Transmit Diversity (SFTD), and time switching. Time Switched Transmit Diversity (TSTD), Frequency Switching Transmit Diversity (FSTD), Orthogonal Transmit Diversity (OTD), Cyclic Delay Diversity (CDD), etc.
  • the current LTE (Long Term Evolution) standard adopts a transmit diversity method such as Space Time Block Coding (STBC), Space Frequency Block Coding (SFBC), and CDD.
  • STBC Space Time Block Coding
  • SFBC Space Frequency Block Coding
  • CDD Code Division Multiple Access
  • the base stations 102-106 and the terminal devices 108-122 can communicate using various wireless communication technologies, such as, but not limited to, Time Division Multiple Access (TDMA) technology, Frequency Division Multiple Access (Frequency Division Multiple Access, FDMA) technology, Code Division Multiple Access (CDMA) technology, Time Division-Synchronous Code Division Multiple Access (TD-SCDMA), Orthogonal Frequency Division Multiple Access (OFDMA) Technology, Single Carrier FDMA (SC-FDMA) technology, Space Division Multiple Access (SDMA) technology, and evolution and derivative technologies of these technologies.
  • TDMA Time Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • CDMA Code Division Multiple Access
  • TD-SCDMA Time Division-Synchronous Code Division Multiple Access
  • OFDMA Orthogonal Frequency Division Multiple Access
  • SC-FDMA Single Carrier FDMA
  • SDMA Space Division Multiple Access
  • the above wireless communication technology is adopted as a radio access technology (RAT) by many wireless communication standards, thereby constructing various wireless communication systems (or networks) well known today, including but not limited to Global System for Mobile Communications (GSM), CDMA2000, Wideband CDMA (WCDMA), WiFi defined by the 802.11 family of standards, Worldwide Interoperability for Microwave Access (WiMAX), Long Term Evolution (Long Term Evolution, LTE), LTE-Advanced (LTE-A), and an evolution system of these wireless communication systems.
  • GSM Global System for Mobile Communications
  • WCDMA Wideband CDMA
  • WiFi defined by the 802.11 family of standards
  • WiMAX Worldwide Interoperability for Microwave Access
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • the wireless communication network 100 shown in FIG. 1 is for example only and is not intended to limit the technical solution of the present invention. It should be understood by those skilled in the art that in a specific implementation process, the wireless communication network 100 may also include other devices, and the number of base stations and terminal devices may also be configured according to specific needs.
  • the user equipment 200 includes a processing module 202 and a transceiver module 204.
  • the processing module 202 is configured to generate indication information, where the indication information is used to indicate a plurality of precoding vectors, where the plurality of precoding vectors include j first type precoding vectors and k second type precoding vectors, where J ⁇ 1, k ⁇ 1, each first type of precoding vector Expressed as:
  • Second class precoding vector Phase parameter 1 ⁇ n ⁇ k.
  • the transceiver module 204 is configured to send the indication information.
  • the indicated precoding vector includes a first type of precoding vector and a second type of precoding vector, where the first type of precoding vector is based on beam combining technology.
  • the constructed precoding vector, the second type of precoding vector is a precoding vector constructed based on the beam selection technique.
  • the precoding matrix corresponding to the four precoding vectors can be expressed as follows:
  • each precoding vector contains two subvectors, for example, each first type of precoding vector. It can contain two subvectors x m,1 and x m,2 .
  • each second type of precoding vector Can contain with Two subvectors.
  • Each sub-vector can act on a set of antenna ports corresponding to the antenna array of the access device.
  • a cross-polarized antenna array typically corresponds to two sets of antenna ports, each set of antenna ports corresponding to one polarization direction.
  • one sub-vector can act on one set of antenna ports corresponding to one polarization direction in the antenna array, and the other sub-vector can act on another polarization direction in the antenna array.
  • each second type of precoding vector Phase parameter Can be understood as the second type of precoding vector
  • the polarization phase difference between the two sub-vectors can also be understood as the polarization phase difference between the two sets of antenna ports corresponding to the two sub-vectors.
  • the second type of precoding vectors may be designed to be orthogonal to each other, and any second type of precoding vectors and any first type of precoding vectors are mutually Orthogonal.
  • a component vector is also required Superposition coefficient ⁇ m,i,r and phase parameters The selection of at least one of the characteristics is further defined. For example, you can limit your choice Time requirement Different from each other, and versus There is no identical vector. On the basis of the above conditions, the superposition coefficient ⁇ m,i,r and phase parameters can be set reasonably.
  • the values are such that the second type of precoding vectors are orthogonal to each other and any of the second type of precoding vectors is orthogonal to any of the first type of precoding vectors.
  • the superposition coefficients of the respective first type of precoding vector component vectors may be first calculated, and based on this, the second type of precoding vectors are orthogonal to each other and any second type of precoding vectors are combined with any first type of precoding.
  • the vectors are orthogonal to each other as required, and the phase parameters of each second type of precoding vector are sequentially calculated.
  • any second type of precoding vectors and any first type of precoding vectors are orthogonal to each other, and therefore, in a specific implementation
  • at least two precoding vectors of the plurality of precoding vectors may not need to be orthogonal to each other, for example, at least two precoding vectors of the second type of precoding vectors need not be orthogonal, and/or at least one The second type of precoding vector does not need to be orthogonal to at least one first type of precoding vector.
  • the above indication information is used to indicate a plurality of precoding vectors.
  • the indication information is specifically used to indicate a component vector Phase parameter And superimposing the coefficients ⁇ m, i, r , to indicate the above plurality of precoding vectors by indicating these information.
  • there are many indication manners such as, but not limited to, directly indicating the information to be indicated, such as the information to be indicated itself or the index of the information to be indicated, and the like, and indirectly indicating the indication to be indicated by indicating other information.
  • the specific indication manner is further It may be various combinations of the above-described pointing methods and the like.
  • the required indication manner may be selected according to specific needs.
  • the embodiment of the present invention does not limit the indication manner of the selection. Therefore, the indication manner involved in the embodiment of the present invention should be understood as The indicator party learns various methods of the information to be instructed.
  • the information to be instructed may be sent together as a whole, or may be separately transmitted into multiple sub-information, and the transmission period and/or the transmission timing of the sub-information may be the same or different.
  • the specific transmission method reference may be made to the prior art, which is not limited by the present invention.
  • the frequency band carrying the wireless communication may be divided into a plurality of narrower frequency bands according to a certain granularity.
  • bands of different widths may be described by means of, for example, but not limited to, wideband and narrowband.
  • the so-called broadband can refer to the system bandwidth, such as the bandwidth corresponding to a radio frequency carrier, such as 20M (megabytes).
  • Broadband can be divided into multiple narrowbands, which can be understood as the bandwidth allocated to the terminal device or a portion of the bandwidth divided from the broadband according to other requirements.
  • the above definitions of broadband and narrowband are for illustrative purposes only and are intended to be understood by the reader. Further definitions of broadband and narrowband in the specific implementation process can refer to the prior art.
  • the applicable bandwidth of the above information may be further specified.
  • the above component vector with Applicable to broadband that is, the first type of precoding vector and the second type of precoding vector of each narrow band in the entire broadband are based on with These component vectors are constructed instead of determining the respective component vectors for each of the narrowband's first type of precoding vector and the second type of precoding vector for each narrowband.
  • Suitable for broadband ie, the second type of precoding vectors for each narrowband in the entire wideband is based on phase parameters
  • phase parameters rather than determine the respective phase parameters for each narrowband's second type of precoding vector for the narrowband
  • the superposition coefficients ⁇ m,i,r can be further decomposed into three parts: wide-band amplitude coefficient, narrow-band amplitude coefficient and narrow-band phase coefficient. It is easy to see that the wide-band amplitude coefficient is suitable for wideband, narrow-band amplitude coefficient and narrow-band phase coefficient are suitable for narrow-band, That is, the respective narrowband amplitude coefficients and narrowband phase coefficients can be determined for each narrow band. Since the partial vectors and/or parameters are applicable to the broadband, the indication can be performed only for the broadband without separately indicating for each narrowband, so that the signaling overhead caused by the indication process can be reduced.
  • a vector set can be designed, the vectors in the vector set are orthogonal to each other, and the component vector with All are selected from this vector set.
  • a corresponding set may be respectively set for the wideband amplitude coefficient, the narrowband amplitude coefficient, and the narrowband phase coefficient further decomposed by the superposition coefficients ⁇ m, i, r , in which case the three coefficients may be respectively selected from corresponding sets. .
  • Simultaneous phase parameter And one or more of the wideband amplitude coefficient, the narrowband amplitude coefficient, and the narrowband phase coefficient constituting the superposition coefficient ⁇ m,i,r may further perform normalization processing, and related content may refer to the prior art, The embodiments of the invention will not be described again.
  • the first type of precoding vector and the second type of precoding vector may be determined in various manners, and the specific manner of the embodiment of the present invention is not limited.
  • each phase value in the phase parameter set can be determined Multiply, and select the vector that best matches the channel from the vector obtained after multiplication, and determine the phase value corresponding to the vector as the phase parameter.
  • the k sets of second type precoding vectors may be used instead of the k second type precoding vectors, wherein each set of second type precoding vectors includes at least one second type precoding vector. And k ⁇ 1.
  • the indication information is used to indicate a plurality of precoding vectors, where the plurality of precoding vectors include j first class precoding vectors and k groups second class precoding vectors, where j ⁇ 1 , k ⁇ 1, the definition of the first type of precoding vector and the second type of precoding vector is as described above, that is, each first type of precoding vector Expressed as:
  • each set of second type precoding vectors contains v second type precoding vectors, each of the second type of precoding vectors of the group Second type of precoding vector Expressed as:
  • Second class precoding vector Used to construct a second type of precoding vector Component vector, Second class precoding vector
  • the phase parameter 1 ⁇ n ⁇ v, v ⁇ 1.
  • the k-group second-type precoding vector at least two sets of second-type precoding vectors include different numbers of second-type precoding vectors.
  • the foregoing multiple precoding vectors may include one first type precoding vector and two second type precoding vectors, wherein one set of second type precoding vectors includes three second type precoding vectors, and the other group
  • the second type of precoding vector contains two second type precoding vectors.
  • at least part or all of the k-type second-type precoding vectors include the same number of second type precoding vectors.
  • the foregoing multiple precoding vectors may include two first precoding vectors and three second precoding vectors, wherein two sets of second precoding vectors include two second precoding vectors, and another A set of second type precoding vectors contains three second class precoding vectors.
  • the foregoing multiple precoding vectors may include two first precoding vectors and three second precoding vectors, wherein each second precoding vector includes two second precoding vectors.
  • the k-group second type precoding vector may be selected from a vector group set, and the vector group set includes a plurality of sets of second type precoding vectors. Further, the number of the second type of precoding vectors included in the second type of precoding vectors of the groups is partially or completely the same.
  • the indication information is specifically used to indicate a component vector Superimposing coefficients ⁇ m, i, r and k sets of second type precoding vectors to indicate the above plurality of precoding vectors by indicating such information.
  • each second type of precoding vector within the same set of second type precoding vectors can be designed to be orthogonal to each other.
  • the second class of precoding vectors may be caused to each other Orthogonal and any second type of precoding vector and any first type of precoding vector are orthogonal to each other in order to reduce interference and improve transmission effect.
  • the second type of precoding vectors are orthogonal to each other not only requiring any two second type precoding vectors in the same group of second type precoding vectors to be orthogonal to each other, but also requiring different types of second type precoding vectors from the second group.
  • the second type of precoding is orthogonal to each other.
  • the above object can be achieved by setting a corresponding definition of the component vector and the superposition coefficient and selecting a k-type second-class precoding vector conforming to a specific definition. It is not difficult to understand that the above specific limitation is used to limit each group. Selection of component vectors and phase parameters in a class II precoding vector. For example, it may be further defined that, in the foregoing plurality of precoding vectors, whether it is a component vector of any first type precoding vector, or a component vector of any second precoding vector included in the k group second class precoding vector, Both may be selected from the same set of vectors within which any two vectors are orthogonal to each other.
  • any component vector in each first class precoding vector, and component vectors of any second class precoding vector in each group of second class precoding vectors are from the same set described above.
  • further definitions can be added to achieve the purpose of making the second type of precoding vectors orthogonal to each other and any of the second type of precoding vectors and any of the first type of precoding vectors being orthogonal to each other.
  • other related technical details may refer to the related description above, and details are not described herein again.
  • the indication information indicates k sets of the second type of precoding vectors
  • details of other technical features may refer to related descriptions in the scheme in which the indication information indicates k second types of precoding vectors.
  • precoding vectors of partial layers may be constructed according to beam combining techniques, and precoding vectors of other layers may be constructed according to beam selection techniques.
  • the technical solution provided by the embodiment of the present invention helps to effectively limit the overhead caused by indicating the precoding vector while improving the accuracy of the precoding vector.
  • FIG. 3 is a schematic diagram showing an exemplary logical structure of an access device 300 according to an embodiment of the invention.
  • the access device 300 includes a processing module 302 and a transceiver module 304.
  • the transceiver module 304 is configured to receive indication information, where the indication information is used to indicate a plurality of precoding vectors, where the plurality of precoding vectors include j first type precoding vectors and k second type precoding vectors, where J ⁇ 1, k ⁇ 1, each first type of precoding vector Expressed as:
  • Second class precoding vector Phase parameter 1 ⁇ n ⁇ k.
  • the plurality of precoding vectors indicated by the indication information may further include j first type precoding vectors and k groups second type precoding vectors, and related content has been described in detail above, and thus I won't go into details here.
  • the processing module 302 is configured to determine the multiple precoding vectors according to the indication information.
  • FIG. 4 is a schematic diagram showing an exemplary hardware structure of a communication device 400 in accordance with an embodiment of the present invention.
  • the communications device may be used to implement the foregoing user equipment, and may also be used to implement the foregoing access device.
  • user equipment 400 includes a processor 402, a transceiver 404, a plurality of antennas 406, a memory 408, an I/O (Input/Output) interface 410, and a bus 412.
  • Memory 408 is further used to store instructions 4082 and data 4084.
  • processor 402, transceiver 404, memory 408, and I/O interface 410 are communicatively coupled to one another via a bus 412, and a plurality of antennas 406 are coupled to transceiver 404.
  • the processor 402, the transceiver 404, the memory 408, and the I/O interface 410 may also be communicatively coupled to each other by using other connections than the bus 412.
  • the processor 402 can be a general-purpose processor, such as, but not limited to, a central processing unit (CPU), or a dedicated processor such as, but not limited to, a digital signal processor (DSP), an application. Application Specific Integrated Circuit (ASIC) and Field Programmable Gate Array (FPGA). Moreover, processor 402 can also be a combination of multiple processors. In particular, in the technical solution provided by the embodiment of the present invention, the processor 402 may be configured to perform, for example, the operation performed by the processing module 202 in the user equipment 200 shown in FIG. 2, or the access device shown in FIG. The operations performed by the processing module 302 in 300.
  • the processor 402 may be a processor specifically designed to perform the above operations, or may be a processor that performs the above operations by reading and executing the instructions 4082 stored in the memory 408, and the processor 402 may perform the above operations. Data 4084 is required.
  • the transceiver 404 is configured to transmit signals through at least one of the plurality of antennas 406 and to receive signals through at least one of the plurality of antennas 406.
  • the transceiver 404 may be specifically configured to be executed by at least one of the plurality of antennas 406.
  • the transceiver module 204 of the user equipment 200 shown in FIG. The operations performed, or the operations performed by the transceiver module 304 in the access device 300 shown in FIG.
  • the memory 408 can be various types of storage media, such as random access memory (RAM), read only memory (ROM), non-volatile RAM (Non-Volatile RAM, NVRAM), Programmable ROM (PROM), Erasable PROM (EPROM), Electrically Erasable PROM (EEPROM), flash memory, optical memory, and registers.
  • RAM random access memory
  • ROM read only memory
  • NVRAM non-volatile RAM
  • PROM Programmable ROM
  • EPROM Erasable PROM
  • EEPROM Electrically Erasable PROM
  • the I/O interface 410 is for receiving instructions and/or data from peripheral devices and outputting instructions and/or data to peripheral devices.
  • the user equipment 400 may also include other hardware devices, which are not enumerated herein.
  • FIG. 5 is a schematic diagram of an exemplary interaction process of a precoding method 500, in accordance with an embodiment of the present invention.
  • Step 502 The user equipment generates indication information, where the indication information is used to indicate a plurality of precoding vectors, where the plurality of precoding vectors include j first type precoding vectors and k second type precoding vectors, where J ⁇ 1, k ⁇ 1, each first type of precoding vector Expressed as:
  • Second class precoding vector Phase parameter 1 ⁇ n ⁇ k.
  • the plurality of precoding vectors indicated by the indication information may further include j first type precoding vectors and k groups second type precoding vectors, and related content has been described in detail above, and thus I won't go into details here.
  • Step 504 The user equipment sends the indication information.
  • Step 506 The access device receives the indication information.
  • Step 508 The access device determines the multiple precoding vectors according to the indication information.
  • the various embodiments described above are described by taking a feedback downlink precoding vector as an example.
  • the technical solution provided by the foregoing embodiment can also be applied to the feedback uplink precoding vector.
  • the operations performed by the user equipment and the access device will change. Specifically, in this case, the operations performed by the user equipment or specific modules or devices in the user equipment in the above embodiments will be converted into corresponding modules or devices in the access device or the access device.
  • the operations performed by the access device or a specific module or device in the access device in the above embodiments are converted to be performed by the user device or a corresponding module or device in the user device.
  • the number of the first type of precoding vectors in the feedback precoding vector may be configured in advance.
  • the appropriate configuration scheme may be selected according to specific needs to configure the number, such as, but not limited to, pre-defined and dynamic indication in the communication standard, etc., and some common setting methods are described below.
  • the configuration or the predefined number in various manners means that when a plurality of precoding vectors that need to be fed back include both the first type of precoding vectors and the second type of precoding, the plurality of pre-codings The number of first type of precoding vectors in the code vector.
  • the first way is to pre-define a unique number in the communication standard, in which case the user equipment and the access device can communicate based on the number. It is not difficult to understand that this method is generally applicable to situations where the number does not change frequently as soon as it is set.
  • the user equipment and the access equipment are usually written to the corresponding quantity before leaving the factory, and the modification of the quantity usually occurs during the system upgrade process.
  • the second way is to pre-define a plurality of quantities in the communication standard, in which case one of the user equipment and the access device determines which number to use and indicates the amount used to the other party.
  • the user equipment and the access equipment usually write the above multiple quantities before leaving the factory, and the modification of these quantities usually occurs during the system upgrade process.
  • the indication of the number used can usually be sent by, for example but not limited to, one of the following signaling:
  • L1 signaling is also referred to as Layer 1 (L1) signaling, which can typically be carried by a control portion in a physical layer frame.
  • L1 signaling is the Downlink Control Information (DCI) and the Physical Uplink Control Channel (PUCCH) carried in the physical downlink control channel (PDCCH) defined in the LTE standard.
  • Uplink Control Information (UCI) carried in the middle.
  • L1 signaling may also be carried by a data part in a physical layer frame.
  • UCI may also be carried by a Physical Uplink Shared Channel (PUSCH). It is not difficult to see that the transmission period or signaling period of L1 signaling is usually the period of the physical layer frame. Therefore, such signaling is usually used to implement some dynamic control to transmit some frequently changing information, for example, through the physical layer. Signaling resource allocation information.
  • Media Access Control (MAC) layer signaling belongs to Layer 2 signaling, which can typically be carried by, for example, but not limited to, a frame header of a Layer 2 frame.
  • the foregoing frame header may also carry information such as, but not limited to, a source address and a destination address.
  • the second layer of frames usually also contains the frame body.
  • L2 signaling may also be carried by the frame body of the second layer frame.
  • a typical example of Layer 2 signaling is the signaling carried in the Frame Control field in the frame header of the MAC frame in the 802.11 series of standards, or the Control Entity (MAC-CE) defined in some protocols.
  • the second layer frame can usually be carried in the data portion of the physical layer frame. The above number may also be sent through other Layer 2 signaling other than media access control layer signaling.
  • Radio Resource Control (RRC) signaling belongs to Layer 3 signaling, which is usually some control message, and L3 signaling can usually be carried in the frame body of the second layer frame.
  • the transmission period or control period of the L3 signaling is usually long, and is suitable for transmitting information that does not change frequently.
  • L3 signaling is usually used to carry some configuration information.
  • the above number can also be sent through other layer 3 signaling other than RRC signaling.
  • the above indication process may be as follows.
  • the user equipment On the user equipment side, the user equipment generates the indication information, where the indication information is used to indicate the quantity used, and the operation may be specifically performed by a processing module in the user equipment; subsequently, the user equipment sends the generated indication information, specifically In this case, the user equipment sends the indication information to the access device, and the operation may be performed by the transceiver module in the user equipment.
  • the access device receives the indication information.
  • the indication information is used to indicate the foregoing quantity used, and the operation may be specifically performed by a transceiver module in the access device; subsequently, The access device determines the quantity according to the indication information, and the operation may be specifically performed by a processing module in the access device.
  • the instruction flow of the above quantity may be as follows.
  • the access device On the access device side, the access device generates indication information, where the indication information is used to indicate the foregoing quantity used, and the operation may be specifically performed by a processing module in the access device; subsequently, the access device sends the generated information.
  • the indication information in particular, the access device sends the indication information to the user equipment, and the operation may be performed by the transceiver module in the access device.
  • the user equipment receives the indication information.
  • the indication information is used to indicate the foregoing quantity used, and the operation may be specifically performed by a transceiver module in the user equipment; subsequently, the user equipment is configured according to The indication information determines the quantity, and the operation may be performed by a processing module in the user equipment.
  • one of the user equipment and the access device configures the foregoing multiple quantities in advance to the other party.
  • the plurality of the foregoing quantities are not in the user equipment and access as described in the second manner.
  • the device is written before leaving the factory, but is configured during the communication between the user device and the access device.
  • one of the user equipment and the access device determines which of the above-mentioned quantities to use, and indicates the above-mentioned quantity to the other party, wherein the above-mentioned number can be determined and indicated. Two ways.
  • a plurality of the foregoing quantities may be configured by, for example, but not limited to, one of the following signaling:
  • the foregoing number of configuration processes may be as follows.
  • the user equipment On the user equipment side, the user equipment generates configuration information, where the configuration information is used to configure the multiple quantities, and the operation may be specifically performed by a processing module in the user equipment; subsequently, the user equipment sends the generated configuration information, specifically The user equipment sends the configuration information to the access device, and the operation may be performed by the transceiver module in the user equipment.
  • the access device receives the configuration information.
  • the configuration information is used to configure the multiple quantities, and the operation may be specifically performed by a transceiver module in the access device; subsequently, The access device configures the multiple quantities according to the configuration information, and the operation may be specifically performed by a processing module in the access device.
  • the foregoing number of configuration processes may be as follows.
  • the access device On the access device side, the access device generates configuration information, where the configuration information is used to configure the multiple quantities, and the operation may be specifically performed by a processing module in the access device; subsequently, the access device sends the generated information.
  • the configuration information is specifically sent by the access device to the user equipment, and the operation may be performed by the transceiver module in the access device.
  • the user equipment receives the configuration information.
  • the configuration information is used to configure the multiple quantities.
  • the operation may be specifically performed by a transceiver module in the user equipment.
  • the user equipment is configured according to the user equipment.
  • the configuration information configures the plurality of quantities, and the operation may be specifically performed by a processing module in the user equipment.
  • the foregoing different number of different configuration schemes and the foregoing different indication schemes may be combined according to requirements, such as but not limited to communication standards or overall requirements of communication system design, and embodiments of the present invention are understood to cover Various combinations.
  • the processing module and the transceiver module in the user equipment may be the processing module 202 and the transceiver module 204 in the user equipment 200 respectively; the processing module and the transceiver module in the access device may be the access device 300 respectively.
  • the above embodiments it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • software it may be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions.
  • the computer program instructions When the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present invention are generated in whole or in part.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transfer to another website site, computer, server, or data center by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL), or wireless (eg, infrared, wireless, microwave, etc.).
  • the computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media.
  • the usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (such as a solid state disk (SSD)).

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Abstract

本发明实施例提供了一种用户设备，包括处理模块，用于生成指示多个预编码向量的指示信息，多个预编码向量包括j个第一类预编码向量和k个第二类预编码向量，每个第一类预编码向量表示为：其中为分量向量，且之中的任意两个分量向量彼此正交，αm,i,r为子向量x m,r中分量向量的叠加系数，1≤m≤j，L>1，r＝1或者2；每个第二类预编码向量表示为：其中，为用于构建第二类预编码向量的分量向量，为第二类预编码向量的相位参数，1≤n≤k；收发模块，用于发送指示信息。本发明实施例还提供了一种接入设备和预编码方法。本发明实施例提供的技术方案有助于在提升预编码向量精度的同时有效限制指示预编码向量所带来的开销。

Description

一种用户设备、接入设备和预编码方法
本申请要求于2017年11月17日提交中国国家知识产权局、申请号为201711148851.0、发明名称为“一种用户设备、接入设备和预编码方法”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明实施例涉及预编码技术，尤其涉及一种用户设备、接入设备和预编码方法。
背景技术
多入多出(Multiple Input Multiple Output，MIMO)技术的出现，给无线通信带来了革命性的变化。通过在发射端设备和接收端设备上部署多根天线，MIMO技术可以显著提高无线通信系统的性能。例如，在分集场景下，MIMO技术可有效提升传输可靠性；在复用场景下，MIMO技术可成倍提升传输吞吐量。
MIMO技术的一个重要分支是预编码，该技术借助与信道属性相匹配的预编码矩阵来对待发射信号进行处理，使得经过预编码的待发射信号与信道相适配，因此传输过程得到优化，接收信号质量(例如SINR)得以提升。目前，预编码技术已经被多种无线通信标准采纳，例如但不限于LTE。
早期的预编码技术基于波束选择(beam selection)方式确定预编码矩阵，这种方式在码本中选择合适的矩阵作为预编码矩阵。预编码矩阵通常包含至少一个列向量，这些列向量可以称为预编码向量，每个列向量用于对一个层(Layer)进行预编码，这个层也可以称为数据层或者空间流等。码本通常是一系列候选矩阵的集合，其中，与信道最为匹配的候选矩阵，可以被选中作为预编码矩阵。在具体实现过程中，可以基于，例如但不限于，信道容量最大化、信道吞吐量最大化或者与理想预编码矩阵最为接近等多种原则，来确定与信道最为匹配的候选矩阵，其中上述理想预编码矩阵可以是对信道矩阵进行奇异值分解(Singular Value Decomposition，SVD)而获得的右酉矩阵的共轭转置矩阵，该共轭转置矩阵的列向量可以称为理想预编码向量。
执行预编码的实际效果通常取决于预编码矩阵与信道的匹配程度，预编码矩阵与信道越匹配，执行预编码的实际效果越好。如上文所述，波束选择方式在码本中选择候选矩阵作为预编码矩阵，因此，码本中的候选矩阵越多，可以匹配的信道就越多。然而，现有码本的容量通常是十分有限的，其目的是为了降低具体实现过程的复杂度，例如但不限于，确定预编码矩阵过程中的计算复杂度。然而，不难理解，对码本容量的限制必然影响预编码矩阵与信道的匹配程度，有限的码本不足以匹配多种多样的信道，预编码的实际效果十分有限。
为克服上述问题，现有技术引入波束组合(beam combination)技术来确定预编码矩阵。波束组合技术在码本中选择多个候选向量作为分量向量进行加权组合，以此来构建预编码向量。在波束组合技术中，码本通常是一系列候选向量的集合，其中，与信道最为匹配的多个候选向量，可以被选中作为分量向量。举例来说，码本中与理想预编码向量最为 接近的候选向量，即可被选中作为分量向量。通过选择合适的候选向量作为分量向量进行加权组合，可以提高预编码向量与信道的匹配程度，，进而提高预编码的执行效果。
尽管波束组合技术可以提高预编码向量的精度，但是也会增加指示预编码向量所带来的开销。例如，依照波束组合技术，在指示预编码向量时，不仅需要指示构建该预编码向量的多个分量向量，还要指示这些分量向量的加权系数。当预编码矩阵包含多个预编码向量时，或者需要反馈多个窄带的预编码向量时，产生的开销将变得更大。
因此，需要一种技术方案，可以在提升预编码向量精度的同时，有效限制指示预编码向量所带来的开销。
发明内容
有鉴于此，实有必要提供一种用户设备，有助于在提升预编码向量精度的同时，有效限制指示预编码向量所带来的开销。
同时，提供一种接入设备，有助于在提升预编码向量精度的同时，有效限制指示预编码向量所带来的开销。
同时，提供一种预编码方法，有助于在提升预编码向量精度的同时，有效限制指示预编码向量所带来的开销。
根据本发明实施例的第一方面，提供一种用户设备，包括：
处理模块，用于生成指示信息，其中，
所述指示信息用于指示多个预编码向量，所述多个预编码向量包括j个第一类预编码向量和k个第二类预编码向量，其中，j≥1，k≥1，每个第一类预编码向量
Figure PCTCN2018112259-appb-000001
表示为：
Figure PCTCN2018112259-appb-000002
其中，x m,r为第一类预编码向量
Figure PCTCN2018112259-appb-000003
的子向量且
Figure PCTCN2018112259-appb-000004
其中，
Figure PCTCN2018112259-appb-000005
为用于构建所述j个第一类预编码向量中任一第一类预编码向量中任一子向量的分量向量，且
Figure PCTCN2018112259-appb-000006
之中的任意两个分量向量彼此正交，α m,i,r为子向量x m,r中分量向量
Figure PCTCN2018112259-appb-000007
的叠加系数，1≤m≤j，L>1，r＝1或者2；每个第二类预编码向量
Figure PCTCN2018112259-appb-000008
表示为：
Figure PCTCN2018112259-appb-000009
其中，
Figure PCTCN2018112259-appb-000010
为用于构建第二类预编码向量
Figure PCTCN2018112259-appb-000011
的分量向量，
Figure PCTCN2018112259-appb-000012
为第二类预编码向量
Figure PCTCN2018112259-appb-000013
的相位参数，1≤n≤k；或者，
所述指示信息用于指示多个预编码向量，所述多个预编码向量包括j个第一类预编码向量和k组第二类预编码向量，其中，j≥1，k≥1，每个第一类预编码向量
Figure PCTCN2018112259-appb-000014
表示为：
Figure PCTCN2018112259-appb-000015
其中，x m,r为第一类预编码向量
Figure PCTCN2018112259-appb-000016
的子向量且
Figure PCTCN2018112259-appb-000017
其中，
Figure PCTCN2018112259-appb-000018
为用于构建所述j个第一类预编码向量中任一第一类预编码向量中任一子向量的分量向量，且
Figure PCTCN2018112259-appb-000019
之中的任意两个分量向量彼此正交，α m,i,r为子向量x m,r中分量向量
Figure PCTCN2018112259-appb-000020
的叠加系数，1≤m≤j，L>1，r＝1或者2；每组第二类预编码向量包含v个第二类预编码向量，该组第二类预编码向量中的每个第二类预编码向量
Figure PCTCN2018112259-appb-000021
表示为：
Figure PCTCN2018112259-appb-000022
其中，
Figure PCTCN2018112259-appb-000023
为用于构建第二类预编码向量
Figure PCTCN2018112259-appb-000024
的分量向量，
Figure PCTCN2018112259-appb-000025
为第二类预编码向量
Figure PCTCN2018112259-appb-000026
的相位参数，1≤n≤v，v≥1；收发模块，用于发送所述指示信息。
根据本发明实施例的第二方面，提供一种接入设备，包括：
收发模块，用于接收指示信息，其中，
所述指示信息用于指示多个预编码向量，所述多个预编码向量包括j个第一类预编码向量和k个第二类预编码向量，其中，j≥1，k≥1，每个第一类预编码向量
Figure PCTCN2018112259-appb-000027
表示为：
Figure PCTCN2018112259-appb-000028
其中，x m,r为第一类预编码向量
Figure PCTCN2018112259-appb-000029
的子向量且
Figure PCTCN2018112259-appb-000030
其中，
Figure PCTCN2018112259-appb-000031
为用于构建所述j个第一类预编码向量中任一第一类预编码向量中任一子向量的分量向量，且
Figure PCTCN2018112259-appb-000032
之中的任意两个分量向量彼此正交，α m,i,r为子向量x m,r中分量向量
Figure PCTCN2018112259-appb-000033
的叠加系数，1≤m≤j，L>1，r＝1或者2；每个第二类预编码向量
Figure PCTCN2018112259-appb-000034
表示为：
Figure PCTCN2018112259-appb-000035
其中，
Figure PCTCN2018112259-appb-000036
为用于构建第二类预编码向量
Figure PCTCN2018112259-appb-000037
的分量向量，
Figure PCTCN2018112259-appb-000038
为第二类预编码向量
Figure PCTCN2018112259-appb-000039
的相位参数，1≤n≤k；或者，
所述指示信息用于指示多个预编码向量，所述多个预编码向量包括j个第一类预编码向量和k组第二类预编码向量，其中，j≥1，k≥1，每个第一类预编码向量
Figure PCTCN2018112259-appb-000040
表示为：
Figure PCTCN2018112259-appb-000041
其中，x m,r为第一类预编码向量
Figure PCTCN2018112259-appb-000042
的子向量且
Figure PCTCN2018112259-appb-000043
其中，
Figure PCTCN2018112259-appb-000044
为用于构建所述j个第一类预编码向量中任一第一类预编码向量中任一子向量的分量向量，且
Figure PCTCN2018112259-appb-000045
之中的任意两个分量向量彼此正交，α m,i,r为子向量x m,r中分量向量
Figure PCTCN2018112259-appb-000046
的叠加系数，1≤m≤j，L>1，r＝1或者2；每组第二类预编码向量包含v个第二类预编码向量，该组第二类预编码向量中的每个第二类预编码向量
Figure PCTCN2018112259-appb-000047
表示为：
Figure PCTCN2018112259-appb-000048
其中，
Figure PCTCN2018112259-appb-000049
为用于构建第二类预编码向量
Figure PCTCN2018112259-appb-000050
的分量向量，
Figure PCTCN2018112259-appb-000051
为第二类预编码向量
Figure PCTCN2018112259-appb-000052
的相位参数，1≤n≤v，v≥1；
处理模块，用于根据所述指示信息确定所述多个预编码向量。
根据本发明实施例的第三方面，提供一种预编码方法，包括：
生成指示信息，其中，
所述指示信息用于指示多个预编码向量，所述多个预编码向量包括j个第一类预编码向量和k个第二类预编码向量，其中，j≥1，k≥1，每个第一类预编码向量
Figure PCTCN2018112259-appb-000053
表示为：
Figure PCTCN2018112259-appb-000054
其中，x m,r为第一类预编码向量
Figure PCTCN2018112259-appb-000055
的子向量且
Figure PCTCN2018112259-appb-000056
其中，
Figure PCTCN2018112259-appb-000057
为用于构建所述j个第一类预编码向量中任一第一类预编码向量中任一子向量的分量向量，且
Figure PCTCN2018112259-appb-000058
之中的任意两个分量向量彼此正交，α m,i,r为子向量x m,r中分量向量
Figure PCTCN2018112259-appb-000059
的叠加系数，1≤m≤j，L>1，r＝1或者2；每个第二类预编码向量
Figure PCTCN2018112259-appb-000060
表示为：
Figure PCTCN2018112259-appb-000061
其中，
Figure PCTCN2018112259-appb-000062
为用于构建第二类预编码向量
Figure PCTCN2018112259-appb-000063
的分量向量，
Figure PCTCN2018112259-appb-000064
为第二类预编码向量
Figure PCTCN2018112259-appb-000065
的相位参数，1≤n≤k；或者，
所述指示信息用于指示多个预编码向量，所述多个预编码向量包括j个第一类预编码向量和k组第二类预编码向量，其中，j≥1，k≥1，每个第一类预编码向量
Figure PCTCN2018112259-appb-000066
表示为：
Figure PCTCN2018112259-appb-000067
其中，x m，r为第一类预编码向量
Figure PCTCN2018112259-appb-000068
的子向量且
Figure PCTCN2018112259-appb-000069
其中，
Figure PCTCN2018112259-appb-000070
为用于构建所述j个第一类预编码向量中任一第一类预编码向量中任一子向量的分量向量，且
Figure PCTCN2018112259-appb-000071
之中的任意两个分量向量彼此正交，α m,i,r为子向量x m,r中分量向量
Figure PCTCN2018112259-appb-000072
的叠加系数，1≤m≤j，L>1，r＝1或者2；每组第二类预编码向量包含v个第二类预编码向量，该组第二类预编码向量中的每个第二类预编码向量
Figure PCTCN2018112259-appb-000073
表示为：
Figure PCTCN2018112259-appb-000074
其中，
Figure PCTCN2018112259-appb-000075
为用于构建第二类预编码向量
Figure PCTCN2018112259-appb-000076
的分量向量，
Figure PCTCN2018112259-appb-000077
为第二类预编码向量
Figure PCTCN2018112259-appb-000078
的相位参数，1≤n≤v，v≥1；
发送所述指示信息。
根据本发明实施例的第四方面，提供一种预编码方法，包括：
接收指示信息，其中，
所述指示信息用于指示多个预编码向量，所述多个预编码向量包括j个第一类预编码向量和k个第二类预编码向量，其中，j≥1，k≥1，每个第一类预编码向量
Figure PCTCN2018112259-appb-000079
表示为：
Figure PCTCN2018112259-appb-000080
其中，x m,r为第一类预编码向量
Figure PCTCN2018112259-appb-000081
的子向量且
Figure PCTCN2018112259-appb-000082
其中，
Figure PCTCN2018112259-appb-000083
为用于构建所述j个第一类预编码向量中任一第一类预编码向量中任一子向量的分量向量，且
Figure PCTCN2018112259-appb-000084
之中的任意两个分量向量彼此正交，α m,i,r为子向量x m,r中分量向量
Figure PCTCN2018112259-appb-000085
的叠加系数，1≤m≤j，L>1，r＝1或者2；每个第二类预编码向量
Figure PCTCN2018112259-appb-000086
表示为：
Figure PCTCN2018112259-appb-000087
其中，
Figure PCTCN2018112259-appb-000088
为用于构建第二类预编码向量
Figure PCTCN2018112259-appb-000089
的分量向量，
Figure PCTCN2018112259-appb-000090
为第二类预编码向量
Figure PCTCN2018112259-appb-000091
的相位参数，1≤n≤k；或者，
所述指示信息用于指示多个预编码向量，所述多个预编码向量包括j个第一类预编码向量和k组第二类预编码向量，其中，j≥1，k≥1，每个第一类预编码向量
Figure PCTCN2018112259-appb-000092
表示为：
Figure PCTCN2018112259-appb-000093
其中，x m,r为第一类预编码向量
Figure PCTCN2018112259-appb-000094
的子向量且
Figure PCTCN2018112259-appb-000095
其中，
Figure PCTCN2018112259-appb-000096
为用于构建所述j个第一类预编码向量中任一第一类预编码向量中任一子向量的分量向量，且
Figure PCTCN2018112259-appb-000097
之中的任意两个分量向量彼此正交，α m,i,r为子向量x m,r中分量向量
Figure PCTCN2018112259-appb-000098
的叠加系数，1≤m≤j，L>1，r＝1或者2；每组第二类预编码向量包含v个第二类预编码向量，该组第二类预编码向量中的每个第二类预编码向量
Figure PCTCN2018112259-appb-000099
表示为：
Figure PCTCN2018112259-appb-000100
其中，
Figure PCTCN2018112259-appb-000101
为用于构建第二类预编码向量
Figure PCTCN2018112259-appb-000102
的分量向量，
Figure PCTCN2018112259-appb-000103
为第二类预编码向量
Figure PCTCN2018112259-appb-000104
的相位参数，1≤n≤v，v≥1；
根据所述指示信息确定所述多个预编码向量。
根据本发明实施例的第五方面，提供一种用户设备，包括：
处理器，用于生成指示信息，其中，
所述指示信息用于指示多个预编码向量，所述多个预编码向量包括j个第一类预编码向量和k个第二类预编码向量，其中，j≥1，k≥1，每个第一类预编码向量
Figure PCTCN2018112259-appb-000105
表示为：
Figure PCTCN2018112259-appb-000106
其中，x m，r为第一类预编码向量
Figure PCTCN2018112259-appb-000107
的子向量且
Figure PCTCN2018112259-appb-000108
其中，
Figure PCTCN2018112259-appb-000109
为用于构建所述j个第一类预编码向量中任一第一类预编码向量中任一子向量的分量向量，且
Figure PCTCN2018112259-appb-000110
之中的任意两个分量向量彼此正交，α m,i,r为子向量x m,r中分 量向量
Figure PCTCN2018112259-appb-000111
的叠加系数，1≤m≤j，L>1，r＝1或者2；每个第二类预编码向量
Figure PCTCN2018112259-appb-000112
表示为：
Figure PCTCN2018112259-appb-000113
其中，
Figure PCTCN2018112259-appb-000114
为用于构建第二类预编码向量
Figure PCTCN2018112259-appb-000115
的分量向量，
Figure PCTCN2018112259-appb-000116
为第二类预编码向量
Figure PCTCN2018112259-appb-000117
的相位参数，1≤n≤k；或者，
所述指示信息用于指示多个预编码向量，所述多个预编码向量包括j个第一类预编码向量和k组第二类预编码向量，其中，j≥1，k≥1，每个第一类预编码向量
Figure PCTCN2018112259-appb-000118
表示为：
Figure PCTCN2018112259-appb-000119
其中，x m,r为第一类预编码向量
Figure PCTCN2018112259-appb-000120
的子向量且
Figure PCTCN2018112259-appb-000121
其中，
Figure PCTCN2018112259-appb-000122
为用于构建所述j个第一类预编码向量中任一第一类预编码向量中任一子向量的分量向量，且
Figure PCTCN2018112259-appb-000123
之中的任意两个分量向量彼此正交，α m,i,r为子向量x m,r中分量向量
Figure PCTCN2018112259-appb-000124
的叠加系数，1≤m≤j，L>1，r＝1或者2；每组第二类预编码向量包含v个第二类预编码向量，该组第二类预编码向量中的每个第二类预编码向量
Figure PCTCN2018112259-appb-000125
表示为：
Figure PCTCN2018112259-appb-000126
其中，
Figure PCTCN2018112259-appb-000127
为用于构建第二类预编码向量
Figure PCTCN2018112259-appb-000128
的分量向量，
Figure PCTCN2018112259-appb-000129
为第二类预编码向量
Figure PCTCN2018112259-appb-000130
的相位参数，1≤n≤v，v≥1；
收发器，用于发送所述指示信息。
根据本发明实施例的第六方面，提供一种接入设备，包括：
收发器，用于接收指示信息，其中，
所述指示信息用于指示多个预编码向量，所述多个预编码向量包括j个第一类预编码向量和k个第二类预编码向量，其中，j≥1，k≥1，每个第一类预编码向量
Figure PCTCN2018112259-appb-000131
表示为：
Figure PCTCN2018112259-appb-000132
其中，x m，r为第一类预编码向量
Figure PCTCN2018112259-appb-000133
的子向量且
Figure PCTCN2018112259-appb-000134
其中，
Figure PCTCN2018112259-appb-000135
为用于构建所述j个第一类预编码向量中任一第一类预编码向量中任一子向量的分量向量，且
Figure PCTCN2018112259-appb-000136
之中的任意两个分量向量彼此正交，α m,i,r为子向量x m,r中分量向量
Figure PCTCN2018112259-appb-000137
的叠加系数，1≤m≤j，L>1，r＝1或者2；每个第二类预编码向量
Figure PCTCN2018112259-appb-000138
表示为：
Figure PCTCN2018112259-appb-000139
其中，
Figure PCTCN2018112259-appb-000140
为用于构建第二类预编码向量
Figure PCTCN2018112259-appb-000141
的分量向量，
Figure PCTCN2018112259-appb-000142
为第二类预编码向量
Figure PCTCN2018112259-appb-000143
的相位参数，1≤n≤k；或者，
所述指示信息用于指示多个预编码向量，所述多个预编码向量包括j个第一类预编码向量和k组第二类预编码向量，其中，j≥1，k≥1，每个第一类预编码向量
Figure PCTCN2018112259-appb-000144
表示为：
Figure PCTCN2018112259-appb-000145
其中，x m,r为第一类预编码向量
Figure PCTCN2018112259-appb-000146
的子向量且
Figure PCTCN2018112259-appb-000147
其中，
Figure PCTCN2018112259-appb-000148
为用于构建所述j个第一类预编码向量中任一第一类预编码向量中任一子向量的分量向量，且
Figure PCTCN2018112259-appb-000149
之中的任意两个分量向量彼此正交，α m,i,r为子向量x m,r中分量向量
Figure PCTCN2018112259-appb-000150
的叠加系数，1≤m≤j，L>1，r＝1或者2；每组第二类预编码向量包含v个第二类预编码向量，该组第二类预编码向量中的每个第二类预编码向量
Figure PCTCN2018112259-appb-000151
表示为：
Figure PCTCN2018112259-appb-000152
其中，
Figure PCTCN2018112259-appb-000153
为用于构建第二类预编码向量
Figure PCTCN2018112259-appb-000154
的分量向量，
Figure PCTCN2018112259-appb-000155
为第二类预编码向量
Figure PCTCN2018112259-appb-000156
的相位参数，1≤n≤v，v≥1；
处理器，用于根据所述指示信息确定所述多个预编码向量。
在具体实现过程中，处理器可用于进行，例如但不限于，基带相关处理，收发器可用于进行，例如但不限于，射频收发。上述器件可以分别设置在彼此独立的芯片上，也可以至少部分的或者全部的设置在同一块芯片上，例如，收发器可以设置在收发器芯片上。又例如，处理器可以进一步划分为模拟基带处理器和数字基带处理器，其中模拟基带处理器可以与收发器集成在同一块芯片上，数字基带处理器可以设置在独立的芯片上。随着集成电路技术的不断发展，可以在同一块芯片上集成的器件越来越多，例如，数字基带处理器可以与多种应用处理器(例如但不限于图形处理器，多媒体处理器等)集成在同一块芯片之上。这样的芯片可以称为系统芯片(System on Chip)。将各个器件独立设置在不同的芯片上，还是整合设置在一个或者多个芯片上，往往取决于产品设计的具体需要。本发明实施例对上述器件的具体实现形式不做限定。
根据本发明实施例的第七方面，提供一种用户设备，包括：
处理模块，用于生成指示信息，所述指示信息用于指示所采用的数量，该数量为，当需要反馈的多个预编码向量包含第一类预编码向量和第二类预编码时，上述多个预编码向量中第一类预编码向量的数量；
收发模块，用于发送所述指示信息。
根据本发明实施例的第八方面，提供一种接入设备，包括：
收发模块，用于接收指示信息，所述指示信息用于指示所采用的数量，该数量为，当需要反馈的多个预编码向量包含第一类预编码向量和第二类预编码时，上述多个预编码向量中第一类预编码向量的数量；
处理模块，用于根据所述指示信息确定所述数量。
根据本发明实施例的第九方面，提供一种指示方法，包括：
用户设备生成指示信息，所述指示信息用于指示所采用的数量，该数量为，当需要反馈的多个预编码向量包含第一类预编码向量和第二类预编码时，上述多个预编码向量中第一类预编码向量的数量；
用户设备发送所述指示信息。
根据本发明实施例的第十方面，提供一种指示方法，包括：
接入设备接收指示信息，所述指示信息用于指示所采用的数量，该数量为，当需要反馈的多个预编码向量包含第一类预编码向量和第二类预编码时，上述多个预编码向量中第一类预编码向量的数量；
接入设备根据所述指示信息确定所述数量。
根据本发明实施例的第十一方面，提供一种接入设备，包括：
处理模块，用于生成指示信息，所述指示信息用于指示所采用的数量，该数量为，当需要反馈的多个预编码向量包含第一类预编码向量和第二类预编码时，上述多个预编码向量中第一类预编码向量的数量；
收发模块，用于发送所述指示信息。
根据本发明实施例的第十二方面，提供一种用户设备，包括：
收发模块，用于接收指示信息，所述指示信息用于指示所采用的数量，该数量为，当需要反馈的多个预编码向量包含第一类预编码向量和第二类预编码时，上述多个预编码向量中第一类预编码向量的数量；
处理模块，用于根据所述指示信息确定所述数量。
根据本发明实施例的第十三方面，提供一种指示方法，包括：
接入设备生成指示信息，所述指示信息用于指示所采用的数量，该数量为，当需要反馈的多个预编码向量包含第一类预编码向量和第二类预编码时，上述多个预编码向量中第一类预编码向量的数量；
接入设备发送所述指示信息。
根据本发明实施例的第十四方面，提供一种指示方法，包括：
用户设备接收指示信息，所述指示信息用于指示所采用的数量，该数量为，当需要反馈的多个预编码向量包含第一类预编码向量和第二类预编码时，上述多个预编码向量中第一类预编码向量的数量；
用户设备根据所述指示信息确定所述数量。
根据本发明实施例的第十五方面，提供一种用户设备，包括：
处理模块，用于生成配置信息，所述配置信息用于配置多种数量，每种数量为，当需要反馈的多个预编码向量包含第一类预编码向量和第二类预编码时，上述多个预编码向量中第一类预编码向量的数量；
收发模块，用于发送配置信息。
根据本发明实施例的第十六方面，提供一种接入设备，包括：
收发模块，用于接收配置信息，所述配置信息用于配置多种数量，每种数量为，当需要反馈的多个预编码向量包含第一类预编码向量和第二类预编码时，上述多个预编码向量中第一类预编码向量的数量；
处理模块，用于根据所述配置信息配置多种数量。
根据本发明实施例的第十七方面，提供一种配置方法，包括：
用户设备生成配置信息，所述配置信息用于配置多种数量，每种数量为，当需要反馈的多个预编码向量包含第一类预编码向量和第二类预编码时，上述多个预编码向量中第一类预编码向量的数量；
用户设备发送配置信息。
根据本发明实施例的第十八方面，提供一种配置方法，包括：
接入设备接收配置信息，所述配置信息用于配置多种数量，每种数量为，当需要反馈的多个预编码向量包含第一类预编码向量和第二类预编码时，上述多个预编码向量中第一类预编码向量的数量；
接入设备根据所述配置信息配置多种数量。
根据本发明实施例的第十九方面，提供一种接入设备，包括：
处理模块，用于生成配置信息，所述配置信息用于配置多种数量，每种数量为，当需要反馈的多个预编码向量包含第一类预编码向量和第二类预编码时，上述多个预编码向量中第一类预编码向量的数量；
收发模块，用于发送配置信息。
根据本发明实施例的第二十方面，提供一种用户设备，包括：
收发模块，用于接收配置信息，所述配置信息用于配置多种数量，每种数量为，当需要反馈的多个预编码向量包含第一类预编码向量和第二类预编码时，上述多个预编码向量中第一类预编码向量的数量；
处理模块，用于根据所述配置信息配置多种数量。
根据本发明实施例的第二十一方面，提供一种配置方法，包括：
接入设备生成配置信息，所述配置信息用于配置多种数量，每种数量为，当需要反馈的多个预编码向量包含第一类预编码向量和第二类预编码时，上述多个预编码向量中第一类预编码向量的数量；
接入设备发送配置信息。
根据本发明实施例的第二十二方面，提供一种配置方法，包括：
用户设备接收配置信息，所述配置信息用于配置多种数量，每种数量为，当需要反馈的多个预编码向量包含第一类预编码向量和第二类预编码时，上述多个预编码向量中第一类预编码向量的数量；
用户设备根据所述配置信息配置多种数量。
根据本发明实施例的第二十三方面，提供一种处理器，用于执行上述各种方法。在执行这些方法的过程中，上述方法中有关发送上述信息和接收上述信息的过程，可以理解为由处理器输出上述信息的过程，以及处理器接收输入的上述信息过程。具体来说，在输出上述信息时，处理器将该上述信息输出给收发器，以便由收发器进行发射。更进一步的，该上述信息在由处理器输出之后，还可能需要进行其他的处理，然后才到达收发器。类似的，处理器接收输入的上述信息时，收发器接收该上述信息，并将其输入处理器。更进一步的，在收发器收到该上述信息之后，该上述信息可能需要进行其他的处理，然后才输入处理器。
基于上述原理，举例来说，前述方法中提及的接收所述指示信息可以理解为处理器接收输入的所述指示信息。又例如，发送所述指示信息可以理解为处理器输出所述指示信息。
如此一来，对于处理器所涉及的发射、发送和接收等操作，如果没有特殊说明，或者，如果未与其在相关描述中的实际作用或者内在逻辑相抵触，则均可以更加一般性的理解为处理器输出和接收输入等操作，而不是直接由射频电路和天线所进行的发射、发送和接收 操作。
在具体实现过程中，上述处理器可以是专门用于执行这些方法的处理器，也可以是执行存储器中的计算机指令来执行这些方法的处理器，例如通用处理器，此时，处理器和存储器归属于一通信设备，例如包含在该通信设备中。上述存储器可以为非瞬时性(non-transitory)存储器，例如只读存储器(Read Only Memory，ROM)，其可以与处理器集成在同一块芯片上，也可以分别设置在不同的芯片上，本发明实施例对存储器的类型以及存储器与处理器的设置方式不做限定。
根据本发明实施例的第二十四方面，提供一种计算机可读存储介质，包括指令，当其在计算机上运行时，使得计算机执行上述任一方法。
在具体实现过程中，上述计算机可读存储介质为非瞬时性的。
根据本发明实施例的第二十五方面，提供一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行上述任一方法。
如上述任一方面，在一种可能的设计中，在上述多个预编码向量中，各第二类预编码向量彼此正交且任一第二类预编码向量与任一第一类预编码向量彼此正交。
如上述任一方面，在一种可能的设计中，所述分量向量
Figure PCTCN2018112259-appb-000157
和
Figure PCTCN2018112259-appb-000158
均选自同一向量集合，在该向量集合中，任意两个向量彼此正交。
如上述任一方面，在一种可能的设计中，当所述指示信息用于指示多个预编码向量且所述多个预编码向量包括j个第一类预编码向量和k个第二类预编码向量时，所述指示信息用于指示分量向量
Figure PCTCN2018112259-appb-000159
相位参数
Figure PCTCN2018112259-appb-000160
和叠加系数α m,i,r；
当所述指示信息用于指示多个预编码向量且所述多个预编码向量包括j个第一类预编码向量和k组第二类预编码向量时，所述指示信息具体用于指示分量向量
Figure PCTCN2018112259-appb-000161
叠加系数α m,i,r以及k组第二类预编码向量。
根据本发明实施例提供的技术方案，对于同时传输的多个层，可以依照波束组合技术来构建部分层的预编码向量，以及依照波束选择技术来构建其它层的预编码向量。在这种情况下，本发明实施例提供的技术方案有助于在提升预编码向量精度的同时有效限制指示预编码向量所带来的开销。
附图说明
图1是依照本发明一实施例的无线通信网络的示范性示意图；
图2是依照本发明一实施例的用户设备的示范性逻辑结构示意图；
图3是依照本发明一实施例的接入设备的示范性逻辑结构示意图；
图4是依照本发明一实施例的通信设备的示范性硬件结构示意图；
图5是依照本发明一实施例的预编码方法的示范性交互过程示意图。
具体实施方式
由背景技术可知，波束组合技术可以提高预编码向量的精度，但也会大大增加指示开销。相比之下，波束选择技术在指示预编码矩阵时仅仅上报所选候选矩阵的索引即可，可以在很大程度上降低指示开销，但预编码矩阵的精度不高。
目前正处于研发阶段的下一代无线通信系统又可称为新无线(New Radio，NR)系统 或者5G系统。最新研究进展显示，在下一代无线通信系统中，将会同时采纳波束选择技术和波束组合技术，以便充分利用两种技术各自的优点。具体来说，在层数不超过2层时，使用波束组合技术来确定预编码向量。在层数超过2层时，使用波束选择技术来确定预编码矩阵。由此可知，例如，当层数为2层时，将依照波束组合技术来构建各层的预编码向量；当层数为3层时，将依照波束选择技术选择包含3个预编码向量的预编码矩阵。由此可见，尽管同时采纳了波束选择技术和波束组合技术两种预编码技术，但是在同一时刻实际上只能使用上述两种预编码技术之中的一种。因此，当层数超过2层时，预编码矩阵的精度将受到码本容量的限制，任何一层的传输效果都会受到低精度预编码向量的制约。由此可见，在下一代无线通信系统中，当层数较高时，无法实现在提升预编码矩阵的精度的同时有效限制指示预编码向量所带来的开销。
针对这种情况，本发明实施例提供了一种技术方案，针对同时传输的多个层，依照波束组合技术来构建部分层的预编码向量，以及依照波束选择技术来构建其它层的预编码向量。在这种情况下，上述层的传输过程将同时使用两种预编码技术，因此可以充分利用两种预编码技术的各自优点。如此一来，本发明实施例提供的技术方案有助于在提升预编码向量精度的同时有效限制指示预编码向量所带来的开销。
下面就结合附图和具体实施例来对本发明实施例提供的技术方案进行详细描述。应注意，为便于描述，下文将要描述的技术方案是以反馈下行预编码向量为例进行描述的。在反馈下行预编码向量时，用户设备接收接入设备发出的参考信号，确定并向接入设备指示预编码向量。本领域的技术人员在阅读下文描述的技术方案之后应当明白，本发明实施例提供的技术方案也适用于反馈上行预编码向量。在反馈上行预编码向量时，接入设备接收用户设备发出的参考信号，确定并向用户设备指示预编码向量。
图1是依照本发明一实施例的无线通信网络100的示范性示意图。如图1所示，无线通信网络100包括基站102～106和终端设备108～122，其中，基站102～106彼此之间可通过回程(backhaul)链路(如基站102～106彼此之间的直线所示)进行通信，该回程链路可以是有线回程链路(例如光纤、铜缆)，也可以是无线回程链路(例如微波)。终端设备108～122可通过无线链路(如基站102～106与终端设备108～122之间的折线所示)与对应的基站102～106通信。
基站102～106通常作为接入设备来为通常作为用户设备的终端设备108～122提供无线接入服务。具体来说，每个基站都对应一个服务覆盖区域(又可称为蜂窝，如图1中各椭圆区域所示)，进入该区域的终端设备可通过无线信号与基站通信，以此来接受基站提供的无线接入服务。基站的服务覆盖区域之间可能存在交叠，处于交叠区域内的终端设备可收到来自多个基站的无线信号，因此这些基站可以进行相互协同，以此来为该终端设备提供服务。例如，多个基站可以采用多点协作(Coordinated multipoint，CoMP)技术为处于上述交叠区域的终端设备提供服务。例如，如图1所示，基站102与基站104的服务覆盖区域存在交叠，终端设备112便处于该交叠区域之内，因此终端设备112可以收到来自基站102和基站104的无线信号，基站102和基站104可以进行相互协同，来为终端设备112提供服务。又例如，如图1所示，基站102、基站104和基站106的服务覆盖区域存在一个共同的交叠区域，终端设备120便处于该交叠区域之内，因此终端设备120可以收到来自基站102、104和106的无线信号，基站102、104和106可以进行相互协同，来为 终端设备120提供服务。
依赖于所使用的无线通信技术，基站又可称为节点B(NodeB)，演进节点B(evolved NodeB,eNodeB)以及接入点(Access Point，AP)等。此外，根据所提供的服务覆盖区域的大小，基站又可分为用于提供宏蜂窝(Macro cell)的宏基站、用于提供微蜂窝(Pico cell)的微基站和用于提供毫微微蜂窝(Femto cell)的毫微微基站等。随着无线通信技术的不断演进，未来的基站也可以采用其他的名称。
终端设备108～122可以是具备无线通信功能的各种无线通信设备，例如但不限于移动蜂窝电话、无绳电话、个人数字助理(Personal Digital Assistant，PDA)、智能电话、笔记本电脑、平板电脑、无线数据卡、无线调制解调器(Modulator demodulator，Modem)或者可穿戴设备如智能手表等。随着物联网(Internet of Things，IOT)技术和车联网(Vehicle-to-everything，V2X)技术的兴起，越来越多之前不具备通信功能的设备，例如但不限于，家用电器、交通工具、工具设备、服务设备和服务设施，开始通过配置无线通信单元来获得无线通信功能，从而可以接入无线通信网络，接受远程控制。此类设备因配置有无线通信单元而具备无线通信功能，因此也属于无线通信设备的范畴。此外，终端设备108～122还可以称为移动台、移动设备、移动终端、无线终端、手持设备、客户端等。
基站102～106，和终端设备108～122均可配置有多根天线，以支持MIMO(多入多出，Multiple Input Multiple Output)技术。进一步的说，基站102～106和终端设备108～122既可以支持单用户MIMO(Single-User MIMO，SU-MIMO)技术，也可以支持多用户MIMO(Multi-User MIMO，MU-MIMO)，其中MU-MIMO可以基于空分多址(Space Division Multiple Access，SDMA)技术来实现。由于配置有多根天线，基站102～106和终端设备108～122还可灵活支持单入单出(Single Input Single Output，SISO)技术、单入多出(Single Input Multiple Output，SIMO)和多入单出(Multiple Input Single Output，MISO)技术，以实现各种分集(例如但不限于发射分集和接收分集)和复用技术，其中分集技术可以包括例如但不限于发射分集(Transmit Diversity，TD)技术和接收分集(Receive Diversity，RD)技术，复用技术可以是空间复用(Spatial Multiplexing)技术。而且上述各种技术还可以包括多种实现方案，例如发射分集技术可以包括，空时发射分集(Space-Time Transmit Diversity，STTD)、空频发射分集(Space-Frequency Transmit Diversity，SFTD)、时间切换发射分集(Time Switched Transmit Diversity，TSTD)、频率切换发射分集(Frequency Switch Transmit Diversity，FSTD)、正交发射分集(Orthogonal Transmit Diversity，OTD)、循环延迟分集(Cyclic Delay Diversity，CDD)等分集方式，以及上述各种分集方式经过衍生、演进以及组合后获得的分集方式。例如，目前LTE(长期演进，Long Term Evolution)标准便采用了空时块编码(Space Time Block Coding，STBC)、空频块编码(Space Frequency Block Coding，SFBC)和CDD等发射分集方式。上文以举例的方式对发射分集进行了的概括性的描述。本领域技术人员应当明白，除上述实例外，发射分集还包括其他多种实现方式。因此，上述介绍不应理解为对本发明技术方案的限制，本发明技术方案应理解为适用于各种可能的发射分集方案。
此外，基站102～106和终端设备108～122可采用各种无线通信技术进行通信，例如但不限于，时分多址(Time Division Multiple Access，TDMA)技术、频分多址(Frequency Division Multiple Access，FDMA)技术、码分多址(Code Division Multiple Access，CDMA) 技术、时分同步码分多址(Time Division-Synchronous Code Division Multiple Access，TD-SCDMA)、正交频分多址(Orthogonal FDMA，OFDMA)技术、单载波频分多址(Single Carrier FDMA，SC-FDMA)技术、空分多址(Space Division Multiple Access，SDMA)技术以及这些技术的演进及衍生技术等。上述无线通信技术作为无线接入技术(Radio Access Technology，RAT)被众多无线通信标准所采纳，从而构建出了在今天广为人们所熟知的各种无线通信系统(或者网络)，包括但不限于全球移动通信系统(Global System for Mobile Communications，GSM)、CDMA2000、宽带CDMA(Wideband CDMA，WCDMA)、由802.11系列标准定义的WiFi、全球互通微波存取(Worldwide Interoperability for Microwave Access，WiMAX)、长期演进(Long Term Evolution，LTE)、LTE升级版(LTE-Advanced，LTE-A)以及这些无线通信系统的演进系统等。如无特别说明，本发明实施例提供的技术方案可应用于上述各种无线通信技术和无线通信系统。此外，术语“系统”和“网络”可以相互替换。
应注意，图1所示的无线通信网络100仅用于举例，并非用于限制本发明的技术方案。本领域的技术人员应当明白，在具体实现过程中，无线通信网络100还可能包括其他设备，同时也可根据具体需要来配置基站和终端设备的数量。
图2是依照本发明一实施例的用户设备200的示范性逻辑结构示意图。如图2所示，用户设备200包括处理模块202和收发模块204。
处理模块202用于生成指示信息，所述指示信息用于指示多个预编码向量，所述多个预编码向量包括j个第一类预编码向量和k个第二类预编码向量，其中，j≥1，k≥1，每个第一类预编码向量
Figure PCTCN2018112259-appb-000162
表示为：
Figure PCTCN2018112259-appb-000163
其中，x m,r为第一类预编码向量
Figure PCTCN2018112259-appb-000164
的子向量且
Figure PCTCN2018112259-appb-000165
其中，
Figure PCTCN2018112259-appb-000166
为用于构建所述j个第一类预编码向量中任一第一类预编码向量中任一子向量的分量向量，且
Figure PCTCN2018112259-appb-000167
之中的任意两个分量向量彼此正交，α m,i,r为子向量x m,r中分量向量
Figure PCTCN2018112259-appb-000168
的叠加系数，1≤m≤j，L>1，r＝1或者2；每个第二类预编码向量
Figure PCTCN2018112259-appb-000169
表示为：
Figure PCTCN2018112259-appb-000170
其中，
Figure PCTCN2018112259-appb-000171
为用于构建第二类预编码向量
Figure PCTCN2018112259-appb-000172
的分量向量，
Figure PCTCN2018112259-appb-000173
为第二类预编码向量
Figure PCTCN2018112259-appb-000174
的相位参数，1≤n≤k。
收发模块204用于发送所述指示信息。
由用户设备200可知，在本发明实施例提供的技术方案中，指示的预编码向量同时包含第一类预编码向量和第二类预编码向量，其中第一类预编码向量为基于波束组合技术构建的预编码向量，第二类预编码向量为基于波束选择技术构建的预编码向量。如此一来，在本发明实施例提供的技术方案中，在同一时刻，可以同时使用上述两种预编码技术，其中，针对同时传送的多个层，部分层使用波束组合技术来构建预编码向量，其它层使用波束选择技术来构建预编码向量。例如，若上述多个预编码向量包括4个预编码向量，这4个预编码向量具体为1个第一类预编码向量和3个第二类预编码向量，第一类预编码向量 包含4个分量向量，则这4个预编码向量对应的预编码矩阵可以表示为如下形式：
Figure PCTCN2018112259-appb-000175
另一方面，每个预编码向量都包含两个子向量，例如，每个第一类预编码向量
Figure PCTCN2018112259-appb-000176
可以包含x m,1和x m,2两个子向量。又例如，每个第二类预编码向量
Figure PCTCN2018112259-appb-000177
可以包含
Figure PCTCN2018112259-appb-000178
和
Figure PCTCN2018112259-appb-000179
两个子向量。每个子向量可以作用于接入设备天线阵列所对应的一组天线端口。例如，交叉极化天线阵列通常对应两组天线端口，每组天线端口对应一个极化方向。在这种情况下，在一个预编码向量中，一个子向量可以作用于天线阵列中一个极化方向所对应的一组天线端口，另一个子向量可以作用于天线阵列中另一个极化方向所对应的一组天线端口。同时，每个第二类预编码向量
Figure PCTCN2018112259-appb-000180
中的相位参数
Figure PCTCN2018112259-appb-000181
可以理解为该第二类预编码向量
Figure PCTCN2018112259-appb-000182
的两个子向量之间的极化相位差，该极化相位差也可以理解为上述两个子向量所对应的两组天线端口之间的极化相位差。
为降低干扰以便提升传输效果，在上述多个预编码向量中，可以将第二类预编码向量设计成彼此正交，且任一第二类预编码向量与任一第一类预编码向量彼此正交。为达到这一目的，除了如上文所述的
Figure PCTCN2018112259-appb-000183
之中的任意两个分量向量彼此正交之外，还需要对分量向量
Figure PCTCN2018112259-appb-000184
叠加系数α m,i,r和相位参数
Figure PCTCN2018112259-appb-000185
之中至少一个特性的选取进行进一步的限定。例如，可以限定在选择
Figure PCTCN2018112259-appb-000186
时要求
Figure PCTCN2018112259-appb-000187
彼此不同，并且
Figure PCTCN2018112259-appb-000188
与
Figure PCTCN2018112259-appb-000189
Figure PCTCN2018112259-appb-000190
不存在相同的向量。在上述条件的基础上，便可以通过合理设置叠加系数α m,i,r和相位参数
Figure PCTCN2018112259-appb-000191
的取值来达到第二类预编码向量彼此正交且任一第二类预编码向量与任一第一类预编码向量彼此正交的目的。例如，可以首先计算各个第一类预编码向量分量向量的叠加系数，在此基础上，以第二类预编码向量彼此正交且任一第二类预编码向量与任一第一类预编码向量彼此正交为要求，顺序计算各个第二类预编码向量的相位参数
Figure PCTCN2018112259-appb-000192
本领域的技术人员应当明白，实现第二类预编码向量彼此正交且任一第二类预编码向量与任一第一类预编码向量彼此正交的方法有很多种，上述方法仅用于举例，并非用于将具体方法限制为上述方法。在具体实现过程中，可以采用各种方法来达到上述目的，本发明实施例对具体方法不做限定。
此外，提高传输效果的方法有很多种，并非仅限于第二类预编码向量彼此正交且任一第二类预编码向量与任一第一类预编码向量彼此正交，因此，在具体实现过程中，上述多个预编码向量之中的至少两个预编码向量也可以无需彼此正交，例如第二类预编码向量之中的至少两个预编码向量无需正交，和/或至少一个第二类预编码向量与至少一个第一类预编码向量无需正交。
如上文所述，上述指示信息用于指示多个预编码向量。具体来说，所述指示信息具体用于指示分量向量
Figure PCTCN2018112259-appb-000193
相位参数
Figure PCTCN2018112259-appb-000194
和叠加系数α m,i,r，以便通过指示这些信息来指示上述多个预编码向量。在具体实现过程中，指示的方式有很多种，例如但不限于，可以直接指示待指示信息，例如待指示信息本身或者该待指示信息的索引等；也可以通过指示其他信息来间接指示待指示信息，其中该其他信息与待指示信息之间存在关联关系；还可以仅仅指示待指示信息的一部分，而待指示信息的其他部分则是已知的或者提前约定的；此外，具体的指示方式还可以是上述指示方法的各种组合等。在具体实现过程中，可以根据具体的需要选择所需的指示方式，本发明实施例对选择的指示方式不做限定，如此一来， 本发明实施例涉及的指示方式应理解为涵盖可以使得待指示方获知待指示信息的各种方法。同时，待指示信息可以做为一个整体一起发送，也可以分成多个子信息分开发送，而且这些子信息的发送周期和/或发送时机可以相同，也可以不同。具体发送方法可以参考现有技术，本发明对此不做限定。
为便于进行资源分配和信道测量等操作，可以按照一定的粒度将承载无线通信的频带划分为多个更窄的频带。为便于描述，可以借助，例如但不限于宽带和窄带，来描述不同宽度的频带。通常所说的宽带，可以是指系统带宽，例如一个射频载波所对应的带宽，如20M(兆)。宽带可被分为多个窄带，窄带可以理解为给终端设备分配的带宽，或者按照其他需求从宽带中划分出来的一部分带宽。宽带和窄带的上述定义仅用于举例，以便于读者理解。具体实现过程中对宽带和窄带的进一步定义可以参考现有技术。
为降低指示上述信息带来的信令开销，可以进一步规定上述信息的适用带宽。例如，上述分量向量
Figure PCTCN2018112259-appb-000195
和
Figure PCTCN2018112259-appb-000196
适用于宽带，即，整个宽带内各个窄带的第一类预编码向量和第二类预编码向量都是基于
Figure PCTCN2018112259-appb-000197
和
Figure PCTCN2018112259-appb-000198
这几个分量向量来构建的，而并非针对每个窄带为该窄带的第一类预编码向量和第二类预编码向量确定各自的分量向量。类似的，可以设定相位参数
Figure PCTCN2018112259-appb-000199
适用于宽带，即，整个宽带内各个窄带的第二类预编码向量都是基于相位参数
Figure PCTCN2018112259-appb-000200
来构建的，而并非针对每个窄带为该窄带的第二类预编码向量确定各自的相位参数
Figure PCTCN2018112259-appb-000201
作为替代的，也可以设定相位参数
Figure PCTCN2018112259-appb-000202
适用于窄带，即，针对每个窄带需要为该窄带的第二类预编码向量确定对应该窄带的相位参数
Figure PCTCN2018112259-appb-000203
叠加系数α m,i,r可以进一步分解为宽带幅度系数、窄带幅度系数和窄带相位系数三个部分，不难看出，宽带幅度系数适用于宽带，窄带幅度系数和窄带相位系数适用于窄带，即可以针对各个窄带确定各自的窄带幅度系数和窄带相位系数。由于部分向量和/或参数是适用于宽带的，因此可以仅仅针对宽带进行指示，而无需针对各个窄带分别指示，从而可以降低指示过程带来的信令开销。
在具体实现过程中，可以设计一个向量集合，该向量集合内的向量彼此正交，分量向量
Figure PCTCN2018112259-appb-000204
和
Figure PCTCN2018112259-appb-000205
均选自这个向量集合。另外，还可以设计一个相位参数集合，
Figure PCTCN2018112259-appb-000206
可以选自该相位参数集合。此外，可以针对叠加系数α m,i,r进一步分解得到的宽带幅度系数、窄带幅度系数和窄带相位系数分别设置对应的集合，在这种情况下，上述三个系数可以分别选自对应的集合。同时，相位参数
Figure PCTCN2018112259-appb-000207
和构成叠加系数α m,i,r的宽带幅度系数、窄带幅度系数和窄带相位系数之中的一种或者几种信息还可以进行进一步的归一化处理，相关内容可以参考现有技术，本发明实施例对此不再赘述。
第一类预编码向量和第二类预编码向量可以采用各种方式进行确定，本发明实施例对具体方式不做限定。举例来说，对于第二类预编码向量而言，在确定
Figure PCTCN2018112259-appb-000208
之后，可以将相位参数集合中的各个相位值与确定的
Figure PCTCN2018112259-appb-000209
相乘，并从相乘后获得的向量中选择与信道最为匹配的向量，将该向量对应的相位值确定为相位参数
Figure PCTCN2018112259-appb-000210
在另一种实现方案中，也可以使用k组第二类预编码向量来代替上述k个第二类预编码向量，其中，每组第二类预编码向量包含至少一个第二类预编码向量，且k≥1。在这种情况下，所述指示信息用于指示多个预编码向量，所述多个预编码向量包括j个第一类预编码向量和k组第二类预编码向量，其中，j≥1，k≥1，第一类预编码向量和第二类预编码向量的定义如上文所述，即，每个第一类预编码向量
Figure PCTCN2018112259-appb-000211
表示为：
Figure PCTCN2018112259-appb-000212
其中，x m,r为第一类预编码向量
Figure PCTCN2018112259-appb-000213
的子向量且
Figure PCTCN2018112259-appb-000214
其中，
Figure PCTCN2018112259-appb-000215
为用于构建所述j个第一类预编码向量中任一第一类预编码向量中任一子向量的分量向量，且
Figure PCTCN2018112259-appb-000216
之中的任意两个分量向量彼此正交，α m,i,r为子向量x m,r中分量向量
Figure PCTCN2018112259-appb-000217
的叠加系数，1≤m≤j，L>1，r＝1或者2；每组第二类预编码向量包含v个第二类预编码向量，该组第二类预编码向量中的每个第二类预编码向量
Figure PCTCN2018112259-appb-000218
表示为：
Figure PCTCN2018112259-appb-000219
其中，
Figure PCTCN2018112259-appb-000220
为用于构建第二类预编码向量
Figure PCTCN2018112259-appb-000221
的分量向量，
Figure PCTCN2018112259-appb-000222
为第二类预编码向量
Figure PCTCN2018112259-appb-000223
的相位参数，1≤n≤v，v≥1。
在上述k组第二类预编码向量中，至少两组第二类预编码向量所包含的第二类预编码向量的个数彼此不同。例如，上述多个预编码向量可以包含1个第一类预编码向量和2组第二类预编码向量，其中一组第二类预编码向量包含3个第二类预编码向量，另一组第二类预编码向量包含2个第二类预编码向量。或者，在上述k组第二类预编码向量中，至少部分或者全部k组第二类预编码向量所包含的第二类预编码向量的数量相同。例如，上述多个预编码向量可以包含2个第一类预编码向量和3组第二类预编码向量，其中的两组第二类预编码向量均包含2个第二类预编码向量，另一组第二类预编码向量包含3个第二类预编码向量。又例如，上述多个预编码向量可以包含2个第一类预编码向量和3组第二类预编码向量，其中每组第二类预编码向量均包含2个第二类预编码向量。
同时，上述k组第二类预编码向量可以选自向量组集合，该向量组集合包含多组第二类预编码向量。更进一步的，这些组第二类预编码向量所包含的第二类预编码向量的数量部分或者全部相同。
此外，所述指示信息具体用于指示分量向量
Figure PCTCN2018112259-appb-000224
叠加系数α m,i,r以及k组第二类预编码向量，以便通过指示这些信息来指示上述多个预编码向量。
为降低干扰以提升传输效果，同一组第二类预编码向量内的各个第二类预编码向量可以被设计成彼此正交。
当所述指示信息用于指示多个预编码向量且所述多个预编码向量包括j个第一类预编码向量和k组第二类预编码向量时，可以使得第二类预编码向量彼此正交且任一第二类预编码向量与任一第一类预编码向量彼此正交，以便降低干扰，提升传输效果。具体来说，第二类预编码向量彼此正交不仅要求同一组第二类预编码向量中的任意两个第二类预编码向量彼此正交，也要求来自不同组第二类预编码向量的第二类预编码彼此正交。在具体实现过程中，可以通过对分量向量和叠加系数设置相应的限定以及选择符合特定限定的k组第二类预编码向量来实现上述目的，不难理解，上述特定限定用于限制每组第二类预编码向量中分量向量和相位参数的选择。例如，可以进一步限定，在上述多个预编码向量中，无论是任意第一类预编码向量的分量向量，还是k组第二类预编码向量中包含的任意第二预编码向量的分量向量，都可以选自同一向量集合，在该向量集合内，任意两个向量彼此正交。换句话说，每个第一类预编码向量中的任一分量向量，以及每组第二类预编码向量中任一第二类预编码向量的分量向量都来自于上述同一集合。在此基础上，可以增加进一 步的限定，以达到使得第二类预编码向量彼此正交且任一第二类预编码向量与任一第一类预编码向量彼此正交的目的。此外，其他相关技术细节可以参考上文相关描述，具体内容不再赘述。
在指示信息指示k组第二类预编码向量时，其他技术特征的细节可以参考指示信息指示k个第二类预编码向量的方案中的相关描述。
根据本发明实施例提供的技术方案，对于同时传输的多个层，可以依照波束组合技术来构建部分层的预编码向量，以及依照波束选择技术来构建其它层的预编码向量。在这种情况下，本发明实施例提供的技术方案有助于在提升预编码向量精度的同时有效限制指示预编码向量所带来的开销。
图3是依照本发明一实施例的接入设备300的示范性逻辑结构示意图。如图3所示，接入设备300包括处理模块302和收发模块304。
收发模块304用于接收指示信息，所述指示信息用于指示多个预编码向量，所述多个预编码向量包括j个第一类预编码向量和k个第二类预编码向量，其中，j≥1，k≥1，每个第一类预编码向量
Figure PCTCN2018112259-appb-000225
表示为：
Figure PCTCN2018112259-appb-000226
其中，x m,r为第一类预编码向量
Figure PCTCN2018112259-appb-000227
的子向量且
Figure PCTCN2018112259-appb-000228
其中，
Figure PCTCN2018112259-appb-000229
为用于构建所述j个第一类预编码向量中任一第一类预编码向量中任一子向量的分量向量，且
Figure PCTCN2018112259-appb-000230
之中的任意两个分量向量彼此正交，α m,i,r为子向量x m,r中分量向量
Figure PCTCN2018112259-appb-000231
的叠加系数，1≤m≤j，L>1，r＝1或者2；每个第二类预编码向量
Figure PCTCN2018112259-appb-000232
表示为：
Figure PCTCN2018112259-appb-000233
其中，
Figure PCTCN2018112259-appb-000234
为用于构建第二类预编码向量
Figure PCTCN2018112259-appb-000235
的分量向量，
Figure PCTCN2018112259-appb-000236
为第二类预编码向量
Figure PCTCN2018112259-appb-000237
的相位参数，1≤n≤k。
作为替代的，上述指示信息所指示的多个预编码向量还可以包括j个第一类预编码向量和k组第二类预编码向量，相关内容已经在上文进行了详细的描述，因此此处不再赘述。
处理模块302用于根据所述指示信息确定所述多个预编码向量。
接入设备300所涉及的相关技术细节已经在上文结合用户设备200进行了详细的描述，因此此处不再赘述。
图4是依照本发明一实施例的通信设备400的示范性硬件结构示意图。在具体实现过程中，该通信设备可以用于实现上述用户设备，也可以用于实现上述接入设备。
如图4所示，用户设备400包括处理器402、收发器404、多根天线406，存储器408、I/O(输入/输出，Input/Output)接口410和总线412。存储器408进一步用于存储指令4082和数据4084。此外，处理器402、收发器404、存储器408和I/O接口410通过总线412彼此通信连接，多根天线406与收发器404相连。在具体实现过程中，处理器402、收发器404、存储器408和I/O接口410也可以采用总线412之外的其他连接方式彼此通信连接。
处理器402可以是通用处理器，例如但不限于，中央处理器(Central Processing Unit，CPU)，也可以是专用处理器，例如但不限于，数字信号处理器(Digital Signal Processor，DSP)、应用专用集成电路(Application Specific Integrated Circuit，ASIC)和现场可编程门阵列(Field Programmable Gate Array，FPGA)等。此外，处理器402还可以是多个处理器的组合。特别的，在本发明实施例提供的技术方案中，处理器402可以用于执行，例如，图2所示的用户设备200中处理模块202所执行的操作，或者图3所示的接入设备300中处理模块302所执行的操作。处理器402可以是专门设计用于执行上述操作的处理器，也可以是通过读取并执行存储器408中存储的指令4082来执行上述操作的处理器，处理器402在执行上述操作的过程中可能需要用到数据4084。
收发器404用于通过多根天线406之中的至少一根天线发送信号，以及通过多根天线406之中的至少一根天线接收信号。特别的，在本发明实施例提供的技术方案中，收发器404具体可以用于通过多根天线406之中的至少一根天线执行，例如，图2所示的用户设备200中收发模块204所执行的操作，或者图3所示的接入设备300中收发模块304所执行的操作。
存储器408可以是各种类型的存储介质，例如随机存取存储器(Random Access Memory，RAM)、只读存储器(Read Only Memory，ROM)、非易失性RAM(Non-Volatile RAM，NVRAM)、可编程ROM(Programmable ROM，PROM)、可擦除PROM(Erasable PROM，EPROM)、电可擦除PROM(Electrically Erasable PROM，EEPROM)、闪存、光存储器和寄存器等。存储器408具体用于存储指令4082和数据4084，处理器402可以通过读取并执行存储器408中存储的指令4082，来执行上文所述的操作，在执行上述操作的过程中可能需要用到数据4084。
I/O接口410用于接收来自外围设备的指令和/或数据，以及向外围设备输出指令和/或数据。
应注意，在具体实现过程中，用户设备400还可以包括其他硬件器件，本文不再一一列举。
图5是依照本发明一实施例的预编码方法500的示范性交互过程示意图。
步骤502，用户设备生成指示信息，所述指示信息用于指示多个预编码向量，所述多个预编码向量包括j个第一类预编码向量和k个第二类预编码向量，其中，j≥1，k≥1，每个第一类预编码向量
Figure PCTCN2018112259-appb-000238
表示为：
Figure PCTCN2018112259-appb-000239
其中，x m,r为第一类预编码向量
Figure PCTCN2018112259-appb-000240
的子向量且
Figure PCTCN2018112259-appb-000241
其中，
Figure PCTCN2018112259-appb-000242
为用于构建所述j个第一类预编码向量中任一第一类预编码向量中任一子向量的分量向量，且
Figure PCTCN2018112259-appb-000243
之中的任意两个分量向量彼此正交，α m,i,r为子向量x m,r中分量向量
Figure PCTCN2018112259-appb-000244
的叠加系数，1≤m≤j，L>1，r＝1或者2；每个第二类预编码向量
Figure PCTCN2018112259-appb-000245
表示为：
Figure PCTCN2018112259-appb-000246
其中，
Figure PCTCN2018112259-appb-000247
为用于构建第二类预编码向量
Figure PCTCN2018112259-appb-000248
的分量向量，
Figure PCTCN2018112259-appb-000249
为第二类预编码向量
Figure PCTCN2018112259-appb-000250
的相位参数，1≤n≤k。
作为替代的，上述指示信息所指示的多个预编码向量还可以包括j个第一类预编码向量和k组第二类预编码向量，相关内容已经在上文进行了详细的描述，因此此处不再赘述。
步骤504，用户设备发送所述指示信息。
步骤506，接入设备接收所述指示信息。
步骤508，接入设备根据所述指示信息确定所述多个预编码向量。
预编码方法500中涉及的相关技术细节已经在上文结合图2描述的用户设备200进行了详细的描述，因此此处不再赘述。
应注意，上文描述的各个实施例是以反馈下行预编码向量为例进行描述的。然而，本领域的技术人员应当明白，上述实施例提供的技术方案也可以应用于反馈上行预编码向量。在将本发明实施例提供的技术方案应用于反馈上行预编码向量时，用户设备和接入设备所执行的操作将发生变化。具体来说，在这种情况下，上述各个实施例中由用户设备或者用户设备中的具体模块或者器件等执行的操作，将转变成由接入设备或者接入设备中的相应模块或者器件等来执行，而上述实施例中由接入设备或者接入设备中的具体模块或者器件等执行的操作，将转变成由用户设备或者用户设备中的相应模块或者器件等来执行。
另一方面，当反馈的预编码向量同时包含第一类预编码向量和第二类预编码时，可以提前对反馈的预编码向量中第一类预编码向量的数量进行配置。在具体实现过程中，可以根据具体需要选择合适的配置方案来配置该数量，例如但不限于，在通信标准中预先定义和动态指示等，下面就对一些常见的设置方法进行描述。在下文即将进行的描述中，采用各种方式配置或者预先定义的数量，是指当需要反馈的多个预编码向量同时包含第一类预编码向量和第二类预编码时，上述多个预编码向量中第一类预编码向量的数量。
第一种方式，是在通信标准中预先定义唯一的数量，在这种情况下，用户设备和接入设备便可以基于该数量进行通信。不难理解，这种方式通常适用于数量一经设置便不会发生频繁变化的情形。在具体实现过程中，用户设备和接入设备通常在出厂前即已写入相应的数量，并且对该数量的修改通常发生在系统升级过程中。
第二种方式，是在通信标准中预先定义多种数量，在这种情况下，由用户设备和接入设备之中的一方确定采用哪种数量，并将所采用的数量指示给另一方。在具体实现过程中，用户设备和接入设备通常在出厂前即已写入上述多种数量，并且对这些数量的修改通常发生在系统升级过程中。而对所采用的数量的指示通常可以通过，例如但不限于，如下信令之中的一种进行发送：
物理层信令；
媒体访问控制层信令；
无线资源控制信令。
物理层信令也称为第一层(Layer 1，L1)信令，其通常可以由物理层帧中的控制部分来承载。L1信令的典型例子是LTE标准中定义的物理下行控制信道(Physical Downlink Control Channel，PDCCH)中承载的下行控制信息(Downlink Control Information，DCI)和物理上行控制信道(Physical Uplink Control Channel，PUCCH)中承载的上行控制信息(Uplink Control Information，UCI)。在一些情况下，L1信令也可以由物理层帧中的数 据部分来承载，例如，UCI有时也可以通过物理上行共享信道(Physical Uplink Shared Channel，PUSCH)来承载。不难看出，L1信令的发送周期或者信令周期通常为物理层帧的周期，因此这种信令通常用于实现一些动态的控制，以传递一些变化频繁的信息，例如，可以通过物理层信令传送资源分配信息。
媒体访问控制(Media Access Control，MAC)层信令属于第二层(Layer 2)信令，其通常可以由，例如但不限于，第二层帧的帧头来承载。上述帧头中还可能携带，例如但不限于，源地址和目的地址等信息。除帧头外，第二层帧通常还包含帧体。在一些情况下，L2信令也可以由第二层帧的帧体来承载。第二层信令的典型例子是802.11系列标准中MAC帧的帧头中的帧控制(Frame Control)字段中携带的信令，或者一些协议中定义的MAC控制实体(Control Entity，MAC-CE)。第二层帧通常可以携带在物理层帧的数据部分。上述数量也可以通过媒体访问控制层信令之外的其他第二层信令发送。
无线资源控制(Radio Resource Control，RRC)信令属于第三层(Layer 3)信令，其通常是一些控制消息，L3信令通常可以携带在第二层帧的帧体中。L3信令的发送周期或者控制周期通常较长，适用于发送一些不会频繁发生变化的信息，例如，在现有的一些通信标准中，L3信令通常用于承载一些配置信息。上述数量也可以通过RRC信令之外的其他第三层信令发送。
上文所述仅为物理层信令、MAC层信令、RRC信令、第一层信令、第二层信令和第三层信令的原理性描述，有关三种信令的具体细节可以参考现有技术，因此本文不再赘述。
若上述数量是由用户设备确定并指示给接入设备的，则上述数量的指示流程可以如下。在用户设备一侧，用户设备生成指示信息，所述指示信息用于指示所采用的上述数量，该操作具体可以由用户设备中的处理模块来执行；随后，用户设备发送生成的指示信息，具体来说，用户设备将指示信息发往接入设备，该操作具体可以由用户设备中的收发模块来执行。在接入设备一侧，接入设备接收所述指示信息，如上文所述，该指示信息用于指示所采用的上述数量，该操作具体可以由接入设备中的收发模块来执行；随后，接入设备根据所述指示信息确定所述上述数量，该操作具体可以由接入设备中的处理模块来执行。
若上述数量是由接入设备确定并指示用户设备的，则上述数量的指示流程可以如下。在接入设备一侧，接入设备生成指示信息，所述指示信息用于指示所采用的上述数量，该操作具体可以由接入设备中的处理模块来执行；随后，接入设备发送生成的指示信息，具体来说，接入设备将指示信息发往用户设备，该操作具体可以由接入设备中的收发模块来执行。在用户设备一侧，用户设备接收所述指示信息，如上文所述，该指示信息用于指示所采用的上述数量，该操作具体可以由用户设备中的收发模块来执行；随后，用户设备根据所述指示信息确定所述上述数量，该操作具体可以由用户设备中的处理模块来执行。
第三种方式，是由用户设备和接入设备之中的一方提前向另一方配置多种上述数量，换句话说，多种上述数量并非如第二种方式所述是在用户设备和接入设备出厂前即已写入的，而是需要用户设备和接入设备进行通信的过程中配置的。在这种情况下，由用户设备和接入设备之中的一方确定采用哪种上述数量，并将所采用的上述数量指示给另一方，其中，确定和指示上述数量的相关内容可以参考上述第二种方式。
在具体实现过程中，可以借助，例如但不限于，如下信令之中的一种，来配置多种上述数量：
物理层信令；
媒体访问控制层信令；
无线资源控制信令。
若上述多种数量是由用户设备配置给接入设备的，则上述数量的配置流程可以如下。在用户设备一侧，用户设备生成配置信息，所述配置信息用于配置所述多种数量，该操作具体可以由用户设备中的处理模块来执行；随后，用户设备发送生成的配置信息，具体来说用户设备将配置信息发往接入设备，该操作具体可以由用户设备中的收发模块来执行。在接入设备一侧，接入设备接收所述配置信息，如上文所述，该配置信息用于配置所述多种数量，该操作具体可以由接入设备中的收发模块来执行；随后，接入设备根据所述配置信息配置所述多种数量，该操作具体可以由接入设备中的处理模块来执行。
若上述多种数量是由接入设备配置给用户设备的，则上述数量的配置流程可以如下。在接入设备一侧，接入设备生成配置信息，所述配置信息用于配置所述多种数量，该操作具体可以由接入设备中的处理模块来执行；随后，接入设备发送生成的配置信息，具体来说，接入设备将配置信息发往用户设备，该操作具体可以由接入设备中的收发模块来执行。在用户设备一侧，用户设备接收所述配置信息，如上文所述，该配置信息用于配置所述多种数量，该操作具体可以由用户设备中的收发模块来执行；随后，用户设备根据所述配置信息配置所述多种数量，该操作具体可以由用户设备中的处理模块来执行。
在具体实现过程中，上述数量的不同配置方案与上述数量的不同指示方案，可以根据需要，例如但不限于通信标准或者通信系统设计的整体需要，进行组合，而本发明实施例应理解为涵盖各种组合。
在上述各种方式中，用户设备中的处理模块和收发模块可以分别为用户设备200中的处理模块202和收发模块204；上述接入设备中的处理模块和收发模块可以分别为接入设备300中的处理模块302和收发模块304。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本发明实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质(例如固态硬盘Solid State Disk(SSD))等。
综上所述，以上仅为本发明的实施例而已，并非用于限定本发明的保护范围。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (10)

  1. 一种用户设备，其特征在于，包括：
    处理模块，用于生成指示信息，其中，
    所述指示信息用于指示多个预编码向量，所述多个预编码向量包括j个第一类预编码向量和k个第二类预编码向量，其中，j≥1，k≥1，每个第一类预编码向量
    Figure PCTCN2018112259-appb-100001
    表示为：
    Figure PCTCN2018112259-appb-100002
    其中，x m，r为第一类预编码向量
    Figure PCTCN2018112259-appb-100003
    的子向量且
    Figure PCTCN2018112259-appb-100004
    其中，
    Figure PCTCN2018112259-appb-100005
    为用于构建所述j个第一类预编码向量中任一第一类预编码向量中任一子向量的分量向量，且
    Figure PCTCN2018112259-appb-100006
    之中的任意两个分量向量彼此正交，α m,i,r为子向量x m,r中分量向量
    Figure PCTCN2018112259-appb-100007
    的叠加系数，1≤m≤j，L>1，r＝1或者2；每个第二类预编码向量
    Figure PCTCN2018112259-appb-100008
    表示为：
    Figure PCTCN2018112259-appb-100009
    其中，
    Figure PCTCN2018112259-appb-100010
    为用于构建第二类预编码向量
    Figure PCTCN2018112259-appb-100011
    的分量向量，
    Figure PCTCN2018112259-appb-100012
    为第二类预编码向量
    Figure PCTCN2018112259-appb-100013
    的相位参数，1≤n≤k；或者，
    所述指示信息用于指示多个预编码向量，所述多个预编码向量包括j个第一类预编码向量和k组第二类预编码向量，其中，j≥1，k≥1，每个第一类预编码向量
    Figure PCTCN2018112259-appb-100014
    表示为：
    Figure PCTCN2018112259-appb-100015
    其中，x m,r为第一类预编码向量
    Figure PCTCN2018112259-appb-100016
    的子向量且
    Figure PCTCN2018112259-appb-100017
    其中，
    Figure PCTCN2018112259-appb-100018
    为用于构建所述j个第一类预编码向量中任一第一类预编码向量中任一子向量的分量向量，且
    Figure PCTCN2018112259-appb-100019
    之中的任意两个分量向量彼此正交，α m,i,r为子向量x m,r中分量向量
    Figure PCTCN2018112259-appb-100020
    的叠加系数，1≤m≤j，L>1，r＝1或者2；每组第二类预编码向量包含v个第二类预编码向量，该组第二类预编码向量中的每个第二类预编码向量
    Figure PCTCN2018112259-appb-100021
    表示为：
    Figure PCTCN2018112259-appb-100022
    其中，
    Figure PCTCN2018112259-appb-100023
    为用于构建第二类预编码向量
    Figure PCTCN2018112259-appb-100024
    的分量向量，
    Figure PCTCN2018112259-appb-100025
    为第二类预编码向量
    Figure PCTCN2018112259-appb-100026
    的相位参数，1≤n≤v，v≥1；
    收发模块，用于发送所述指示信息。
  2. 如权利要求1所述的用户设备，其特征在于，在上述多个预编码向量中，各第二类预编码向量彼此正交且任一第二类预编码向量与任一第一类预编码向量彼此正交。
  3. 如权利要求1或者2所述的用户设备，其特征在于，所述分量向量
    Figure PCTCN2018112259-appb-100027
    和
    Figure PCTCN2018112259-appb-100028
    均选自同一向量集合，在该向量集合中，任意两个向量彼此正交。
  4. 如权利要求1至3中任一项所述的用户设备，其特征在于，
    当所述指示信息用于指示多个预编码向量且所述多个预编码向量包括j个第一类预 编码向量和k个第二类预编码向量时，所述指示信息用于指示分量向量
    Figure PCTCN2018112259-appb-100029
    相位参数
    Figure PCTCN2018112259-appb-100030
    和叠加系数α m,i,r；
    当所述指示信息用于指示多个预编码向量且所述多个预编码向量包括j个第一类预编码向量和k组第二类预编码向量时，所述指示信息具体用于指示分量向量
    Figure PCTCN2018112259-appb-100031
    叠加系数α m,i,r以及k组第二类预编码向量。
  5. 一种接入设备，其特征在于，包括：
    收发模块，用于接收指示信息，其中，
    所述指示信息用于指示多个预编码向量，所述多个预编码向量包括j个第一类预编码向量和k个第二类预编码向量，其中，j≥1，k≥1，每个第一类预编码向量
    Figure PCTCN2018112259-appb-100032
    表示为：
    Figure PCTCN2018112259-appb-100033
    其中，x m，r为第一类预编码向量
    Figure PCTCN2018112259-appb-100034
    的子向量且
    Figure PCTCN2018112259-appb-100035
    其中，
    Figure PCTCN2018112259-appb-100036
    为用于构建所述j个第一类预编码向量中任一第一类预编码向量中任一子向量的分量向量，且
    Figure PCTCN2018112259-appb-100037
    之中的任意两个分量向量彼此正交，α m,i,r为子向量x m,r中分量向量
    Figure PCTCN2018112259-appb-100038
    的叠加系数，1≤m≤j，L>1，r＝1或者2；每个第二类预编码向量
    Figure PCTCN2018112259-appb-100039
    表示为：
    Figure PCTCN2018112259-appb-100040
    其中，
    Figure PCTCN2018112259-appb-100041
    为用于构建第二类预编码向量
    Figure PCTCN2018112259-appb-100042
    的分量向量，
    Figure PCTCN2018112259-appb-100043
    为第二类预编码向量
    Figure PCTCN2018112259-appb-100044
    的相位参数，1≤n≤k；或者，
    所述指示信息用于指示多个预编码向量，所述多个预编码向量包括j个第一类预编码向量和k组第二类预编码向量，其中，j≥1，k≥1，每个第一类预编码向量
    Figure PCTCN2018112259-appb-100045
    表示为：
    Figure PCTCN2018112259-appb-100046
    其中，x m,r为第一类预编码向量
    Figure PCTCN2018112259-appb-100047
    的子向量且
    Figure PCTCN2018112259-appb-100048
    其中，
    Figure PCTCN2018112259-appb-100049
    为用于构建所述j个第一类预编码向量中任一第一类预编码向量中任一子向量的分量向量，且
    Figure PCTCN2018112259-appb-100050
    之中的任意两个分量向量彼此正交，α m,i,r为子向量x m,r中分量向量
    Figure PCTCN2018112259-appb-100051
    的叠加系数，1≤m≤j，L>1，r＝1或者2；每组第二类预编码向量包含v个第二类预编码向量，该组第二类预编码向量中的每个第二类预编码向量
    Figure PCTCN2018112259-appb-100052
    表示为：
    Figure PCTCN2018112259-appb-100053
    其中，
    Figure PCTCN2018112259-appb-100054
    为用于构建第二类预编码向量
    Figure PCTCN2018112259-appb-100055
    的分量向量，
    Figure PCTCN2018112259-appb-100056
    为第二类预编码向量
    Figure PCTCN2018112259-appb-100057
    的相位参数，1≤n≤v，v≥1；
    处理模块，用于根据所述指示信息确定所述多个预编码向量。
  6. 如权利要求5所述的接入设备，其特征在于，在上述多个预编码向量中，各第二类预编码向量彼此正交且任一第二类预编码向量与任一第一类预编码向量彼此正交。
  7. 如权利要求5或者6所述的接入设备，其特征在于，所述分量向量
    Figure PCTCN2018112259-appb-100058
    和
    Figure PCTCN2018112259-appb-100059
    均选自同一向量集合，在该向量集合中，任意两个向量彼此正交。
  8. 如权利要求5至7中任一项所述的接入设备，其特征在于，
    当所述指示信息用于指示多个预编码向量且所述多个预编码向量包括j个第一类预编码向量和k个第二类预编码向量时，所述指示信息用于指示分量向量
    Figure PCTCN2018112259-appb-100060
    相位参数
    Figure PCTCN2018112259-appb-100061
    和叠加系数α m,i,r；
    当所述指示信息用于指示多个预编码向量且所述多个预编码向量包括j个第一类预编码向量和k组第二类预编码向量时，所述指示信息具体用于指示分量向量
    Figure PCTCN2018112259-appb-100062
    叠加系数α m,i,r以及k组第二类预编码向量。
  9. 一种预编码方法，其特征在于，包括：
    生成指示信息，其中，
    所述指示信息用于指示多个预编码向量，所述多个预编码向量包括j个第一类预编码向量和k个第二类预编码向量，其中，j≥1，k≥1，每个第一类预编码向量
    Figure PCTCN2018112259-appb-100063
    表示为：
    Figure PCTCN2018112259-appb-100064
    其中，x m,r为第一类预编码向量
    Figure PCTCN2018112259-appb-100065
    的子向量且
    Figure PCTCN2018112259-appb-100066
    其中，
    Figure PCTCN2018112259-appb-100067
    为用于构建所述j个第一类预编码向量中任一第一类预编码向量中任一子向量的分量向量，且
    Figure PCTCN2018112259-appb-100068
    之中的任意两个分量向量彼此正交，α m,i,r为子向量x m,r中分量向量
    Figure PCTCN2018112259-appb-100069
    的叠加系数，1≤m≤j，L>1，r＝1或者2；每个第二类预编码向量
    Figure PCTCN2018112259-appb-100070
    表示为：
    Figure PCTCN2018112259-appb-100071
    其中，
    Figure PCTCN2018112259-appb-100072
    为用于构建第二类预编码向量
    Figure PCTCN2018112259-appb-100073
    的分量向量，
    Figure PCTCN2018112259-appb-100074
    为第二类预编码向量
    Figure PCTCN2018112259-appb-100075
    的相位参数，1≤n≤k；或者，
    所述指示信息用于指示多个预编码向量，所述多个预编码向量包括j个第一类预编码向量和k组第二类预编码向量，其中，j≥1，k≥1，每个第一类预编码向量
    Figure PCTCN2018112259-appb-100076
    表示为：
    Figure PCTCN2018112259-appb-100077
    其中，x m,r为第一类预编码向量
    Figure PCTCN2018112259-appb-100078
    的子向量且
    Figure PCTCN2018112259-appb-100079
    其中，
    Figure PCTCN2018112259-appb-100080
    为用于构建所述j个第一类预编码向量中任一第一类预编码向量中任一子向量的分量向量，且
    Figure PCTCN2018112259-appb-100081
    之中的任意两个分量向量彼此正交，α m,i,r为子向量x m,r中分量向量
    Figure PCTCN2018112259-appb-100082
    的叠加系数，1≤m≤j，L>1，r＝1或者2；每组第二类预编码向量包含v个第二类预编码向量，该组第二类预编码向量中的每个第二类预编码向量
    Figure PCTCN2018112259-appb-100083
    表示为：
    Figure PCTCN2018112259-appb-100084
    其中，
    Figure PCTCN2018112259-appb-100085
    为用于构建第二类预编码向量
    Figure PCTCN2018112259-appb-100086
    的分量向量，
    Figure PCTCN2018112259-appb-100087
    为第二类预编码向量
    Figure PCTCN2018112259-appb-100088
    的相位参数，1≤n≤v，v≥1；
    发送所述指示信息。
  10. 一种预编码方法，其特征在于，包括：
    接收指示信息，其中，
    所述指示信息用于指示多个预编码向量，所述多个预编码向量包括j个第一类预编码向量和k个第二类预编码向量，其中，j≥1，k≥1，每个第一类预编码向量
    Figure PCTCN2018112259-appb-100089
    表示为：
    Figure PCTCN2018112259-appb-100090
    其中，x m，r为第一类预编码向量
    Figure PCTCN2018112259-appb-100091
    的子向量且
    Figure PCTCN2018112259-appb-100092
    其中，
    Figure PCTCN2018112259-appb-100093
    为用于构建所述j个第一类预编码向量中任一第一类预编码向量中任一子向量的分量向量，且
    Figure PCTCN2018112259-appb-100094
    之中的任意两个分量向量彼此正交，α m,i,r为子向量x m,r中分量向量
    Figure PCTCN2018112259-appb-100095
    的叠加系数，1≤m≤j，L>1，r＝1或者2；每个第二类预编码向量
    Figure PCTCN2018112259-appb-100096
    表示为：
    Figure PCTCN2018112259-appb-100097
    其中，
    Figure PCTCN2018112259-appb-100098
    为用于构建第二类预编码向量
    Figure PCTCN2018112259-appb-100099
    的分量向量，
    Figure PCTCN2018112259-appb-100100
    为第二类预编码向量
    Figure PCTCN2018112259-appb-100101
    的相位参数，1≤n≤k；或者，
    所述指示信息用于指示多个预编码向量，所述多个预编码向量包括j个第一类预编码向量和k组第二类预编码向量，其中，j≥1，k≥1，每个第一类预编码向量
    Figure PCTCN2018112259-appb-100102
    表示为：
    Figure PCTCN2018112259-appb-100103
    其中，x m,r为第一类预编码向量
    Figure PCTCN2018112259-appb-100104
    的子向量且
    Figure PCTCN2018112259-appb-100105
    其中，
    Figure PCTCN2018112259-appb-100106
    为用于构建所述j个第一类预编码向量中任一第一类预编码向量中任一子向量的分量向量，且
    Figure PCTCN2018112259-appb-100107
    之中的任意两个分量向量彼此正交，α m,i,r为子向量x m,r中分量向量
    Figure PCTCN2018112259-appb-100108
    的叠加系数，1≤m≤j，L>1，r＝1或者2；每组第二类预编码向量包含v个第二类预编码向量，该组第二类预编码向量中的每个第二类预编码向量
    Figure PCTCN2018112259-appb-100109
    表示为：
    Figure PCTCN2018112259-appb-100110
    其中，
    Figure PCTCN2018112259-appb-100111
    为用于构建第二类预编码向量
    Figure PCTCN2018112259-appb-100112
    的分量向量，
    Figure PCTCN2018112259-appb-100113
    为第二类预编码向量
    Figure PCTCN2018112259-appb-100114
    的相位参数，1≤n≤v，v≥1；
    根据所述指示信息确定所述多个预编码向量。
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