WO2021232868A1 - 下行信道状态信息估计方法、装置、设备和存储介质 - Google Patents

下行信道状态信息估计方法、装置、设备和存储介质 Download PDF

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Publication number
WO2021232868A1
WO2021232868A1 PCT/CN2021/077083 CN2021077083W WO2021232868A1 WO 2021232868 A1 WO2021232868 A1 WO 2021232868A1 CN 2021077083 W CN2021077083 W CN 2021077083W WO 2021232868 A1 WO2021232868 A1 WO 2021232868A1
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channel state
state information
downlink channel
data set
downlink
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PCT/CN2021/077083
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English (en)
French (fr)
Inventor
位宁
郁光辉
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中兴通讯股份有限公司
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Priority to US17/795,700 priority Critical patent/US20230055509A1/en
Priority to EP21807979.6A priority patent/EP4156789A4/en
Publication of WO2021232868A1 publication Critical patent/WO2021232868A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/022—Channel estimation of frequency response
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H04L25/0228—Channel estimation using sounding signals with direct estimation from sounding signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/024—Channel estimation channel estimation algorithms

Definitions

  • This application relates to the field of wireless communication networks, for example, to a method, device, device, and storage medium for estimating downlink channel state information.
  • Millimeter wave and large-scale multiple-input multiple-output (MIMO) technologies provide high system transmission capacity for FDD (Frequency Division Duplex) systems, while also bringing downlink channel state information Feedback on overburdened issues. Paradoxically, excessive feedback burden will inhibit the growth of system capacity.
  • the uplink and downlink channel reciprocity that is, the uplink channel state information is equivalent to the downlink channel state information, is a conventional method to eliminate the high feedback burden.
  • the frequency difference between the uplink and downlink channels makes it impossible to be directly quoted by the FDD system.
  • This application provides a method, device, device and storage medium for estimating downlink channel state information.
  • the embodiment of the present application provides a method for estimating downlink channel state information, which is applied to a control node, and the method includes:
  • the embodiment of the present application provides a method for estimating downlink channel state information, which is applied to user equipment, and the method includes:
  • the embodiment of the present application also provides a downlink channel state information estimation device, which is applied to a control node, and the device includes:
  • the sounding sending module is used to send downlink radio frames carrying channel sounding information; the information receiving module is used to receive uplink radio frames carrying the first downlink channel state information data set; the information estimation module is used to obtain uplink channel state information data Set; range estimation module, used to determine the second downlink channel state information data set.
  • the embodiment of the present application provides a downlink channel state information estimation device, which is applied to user equipment, and the device includes:
  • the sounding receiving module is used to receive downlink radio frames carrying channel sounding information; the information determining module is used to determine the first downlink channel state information data set; the information feedback module is used to feed back the first downlink channel state information The uplink radio frame of the data set.
  • An embodiment of the present application provides a device, which includes:
  • One or more processors a memory, used to store one or more programs, when the one or more programs are executed by the one or more processors, so that the one or more processors implement the application
  • the embodiment of the present application provides a computer-readable storage medium on which a computer program is stored, where the program is executed by a processor to implement the downlink channel state information estimation method described in any of the embodiments of the present application.
  • the uplink channel state information data set is obtained, and the second downlink channel state information data set is determined.
  • the channel state information data set realizes the estimation of the downlink channel state information of the frequency division duplex system, reduces the amount of feedback of the downlink channel state information, and thereby reduces the feedback burden of the system.
  • FIG. 1 is a flowchart of a method for estimating downlink channel state information according to an embodiment of the present application
  • FIG. 2 is an example diagram of a time-frequency distribution of a channel state reference signal provided by an embodiment of the present application
  • FIG. 3 is a flowchart of a method for estimating downlink channel state information according to an embodiment of the present application
  • FIG. 4 is an exemplary diagram of a method for estimating downlink channel state information provided by an embodiment of the present application
  • FIG. 5 is an example diagram of frame sequence interaction in a method for estimating downlink channel state information according to an embodiment of the present application
  • FIG. 6 is a schematic structural diagram of a downlink channel state information estimation apparatus provided by an embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of a downlink channel state information estimation apparatus provided by an embodiment of the present application.
  • Fig. 8 is a schematic structural diagram of a device provided by an embodiment of the present application.
  • the frequency response reciprocity is not established, the strong correlation of the propagation path between the uplink and downlink channels makes the impulse response reciprocity established.
  • the base station can calculate the corresponding impulse response through the uplink channel state information, then the downlink channel state information can also be obtained.
  • the user first needs to feed back a small amount of downlink channel state information to the base station. Then the base station determines the downlink channel state information that has not been fed back under the common constraints of the feedback downlink channel state information and the known uplink channel state information. Ultimately, the burden of feedback is reduced due to changes in feedback requirements.
  • Figure 1 is a flowchart of a method for estimating downlink channel state information provided by an embodiment of the present application.
  • the downlink channel state information estimation device can be implemented by software and/or hardware, and is generally integrated in the control node.
  • the control node can control the wireless equipment of the user equipment, including base stations and access points, etc.,
  • the method of the embodiment of the present application includes the following steps:
  • Step 110 Send a downlink radio frame carrying channel sounding information.
  • Channel sounding information is a predefined sequence in determining transmission resources.
  • the medium carried by the channel sounding information is a downlink radio frame, which is used to detect the channel state information of the downlink channel.
  • the channel sounding information is delivered from the control node to the user equipment through the downlink radio frame.
  • Channel sounding information is a predefined sequence distributed on certain transmission resources.
  • a predefined sequence is a sequence of symbols with a specific meaning, and the receiver and the sender can pre-appoint the meaning of the predefined sequence before sending.
  • the predefined sequence is composed of three symbols ⁇ -1, 0, 1 ⁇ , and a predefined sequence can be ⁇ 1 1 -1 -1 1 1 -1 1 -1 1 1 1 1 1 1 1 1 -1 1 -1 1 -1 1 -1 1 1 1 1 1 0 1 -1 -1 1 1 1 -1 1 -1 1 -1 -1 1 1 1 1 1 ⁇ .
  • the predefined sequence includes at least one of a channel state reference signal and a demodulation reference signal.
  • the transmission resources include at least one of time, frequency, space, power, and codeword resources.
  • FIG. 2 is an example diagram of the time-frequency distribution of a channel state reference signal provided by an embodiment of the present application, and the channel state reference information sent by the base station at a determined time interval and frequency interval is shown in FIG. 2.
  • Step 120 Receive an uplink radio frame carrying a first downlink channel state information data set.
  • the uplink radio frame is the radio frame information sent by the user equipment to the control node, and the uplink radio frame includes the status information of the downlink channel.
  • Downlink channel state information includes channel frequency response.
  • the control node may monitor the uplink radio frame sent by the user equipment, and obtain the first downlink channel state information data set in the uplink radio frame .
  • the first downlink channel state information data set is composed of channel state information of some downlink subcarriers.
  • Step 130 Obtain an uplink channel state information data set.
  • the uplink channel state information data set is obtained by uplink radio frame estimation.
  • the saved historical value of the uplink channel state is used to form the uplink channel state information data set.
  • step 120 and step 130 are only used to distinguish execution steps, and are not used to limit the sequence of execution of the steps.
  • Step 130 may be executed before step 120, and step 120 and step 130 may also be executed at the same time.
  • Step 140 Determine a second downlink channel state information data set.
  • the downlink subcarriers corresponding to the second downlink channel state information data set and the first downlink channel state information data set are different.
  • the second downlink channel state information data set is determined by the uplink channel state information data set and the first downlink channel state information data set.
  • parameters such as propagation delay and attenuation coefficient of the propagation path are estimated based on the uplink channel state information data set; the first downlink channel state information data set fed back by the user equipment is used to correct the estimated propagation delay And attenuation coefficient and other parameters; use the corrected parameters to calculate the second downlink channel state information data set.
  • the first downlink channel state information data set includes channel state information of estimated subcarriers and unwrapped subcarriers.
  • the first downlink channel state information data set fed back by the user equipment to the control node includes the channel state information of the estimated sub-carrier and the unwound sub-carrier.
  • the channel state information of the estimated subcarriers is used to calculate the basic values of parameters such as the propagation delay and attenuation coefficient of the propagation path in the basic period, where the basic period refers to [0, 2 ⁇ ].
  • the channel state information of the unwrapped subcarriers is used to filter out the parameter items that meet the requirements from the set generated from the parameter base values within the range of multiple base periods.
  • the multiple fundamental period refers to [-2j ⁇ ,0] ⁇ [2 ⁇ ,2k ⁇ ], where k and j are integers greater than 1 and 0, respectively.
  • the estimated subcarriers and unwrapped subcarriers are randomly distributed in the frequency range where the downlink channel is located.
  • the first downlink channel state information data set and the uplink channel state information data set are used to jointly estimate parameters such as the propagation delay and attenuation coefficient of the propagation path; and the second parameter is calculated using the jointly estimated parameters.
  • Downlink channel state information data set is used to jointly estimate parameters such as the propagation delay and attenuation coefficient of the propagation path; and the second parameter is calculated using the jointly estimated parameters.
  • the number of estimated subcarriers is determined by the number of propagation paths in the downlink channel.
  • the number of the unwrapped sub-carriers is determined by the time delay search interval.
  • the time delay search interval may be determined by the control node, and the determined time delay search interval may be sent to the user equipment.
  • the time delay search interval may also be determined by the user equipment, and the determined time delay search interval is sent to the control node.
  • FIG. 3 is a flowchart of a method for estimating downlink channel state information provided by an embodiment of the present application.
  • the embodiment of the present application is applicable to the case of estimating downlink channel state information in an FDD system.
  • the downlink channel state information estimation device is implemented, which can be implemented by software and/or hardware, and is generally integrated in user equipment.
  • the method in the embodiment of the present application includes the following steps:
  • Step 210 Receive a downlink radio frame carrying channel sounding information.
  • the user equipment receives the downlink radio frame issued by the control node, where the downlink radio frame includes channel sounding information.
  • the channel sounding information may be a channel state reference signal and/or a demodulation reference signal, and the channel sounding information may be used to detect the downlink channel state to obtain the channel frequency response from the control node to the user equipment.
  • the channel sounding information is a predefined sequence distributed on the determined transmission resource.
  • Step 220 Determine the first downlink channel state information data set.
  • the first downlink channel state information data set is a data set composed of downlink channel state information.
  • the user equipment can randomly select downlink subcarriers, obtain the channel state information of the corresponding downlink subcarriers, and use the obtained channel state information of the downlink subcarriers as the first downlink channel state information data set.
  • the first downlink channel state information data set includes channel state information of estimated subcarriers and unwrapped subcarriers.
  • Step 230 Feed back the uplink radio frame that carries the first downlink channel state information data set.
  • the user equipment sends the first downlink channel state information data to the control node through an uplink radio frame.
  • the downlink channel state information data set is determined by receiving the downlink radio frame carrying the channel sounding information, and the uplink radio frame carrying the downlink channel state information data set is fed back.
  • determining the downlink channel state information includes:
  • the user equipment obtains the frequency response of the downlink wireless channel, and calculates the propagation delay and attenuation coefficient of the corresponding propagation path according to the frequency response.
  • the number of estimated subcarriers is determined by the number of propagation paths of the channel.
  • the number of channel state information of the estimated subcarriers in the first downlink channel state information data set corresponds to the number of propagation paths, for example, the estimator The number of carriers is equal to the number of propagation paths.
  • the estimated sub-carrier can be selected by randomly selecting the sub-carrier index and/or the sub-carrier position, and the corresponding channel state information can be stored in the first downlink channel state information data set.
  • the number of the unwrapped sub-carriers is determined by the time delay search interval.
  • the user equipment determines the number of unwrapped subcarriers based on the time delay search interval. Generally, the larger the time delay search interval, the greater the number of selected unwrapped subcarriers, where the time delay search interval can be determined by the control node, and the control node sends the time delay search interval to the user equipment.
  • the unwrapped subcarriers in the first downlink channel state information data set are obtained by randomly selecting subcarrier indexes and/or subcarrier positions.
  • FIG. 4 is an example diagram of a method for estimating downlink channel state information provided by an embodiment of the present application.
  • a base station sends a downlink wireless channel carrying channel sounding information to a user terminal.
  • the user equipment obtains downlink channel state information according to the downlink radio frame.
  • the user equipment sends an uplink radio frame carrying downlink channel state information to the base station on the corresponding uplink transmission resource.
  • the base station estimates the uplink channel state information, and then, under the constraints of the feedback downlink channel state information, calculates the channel state information of other downlink subcarriers other than the downlink subcarrier that is known to be fed back.
  • the base station and the user equipment implement information exchange through a downlink radio frame carrying channel sounding information and an uplink radio frame carrying downlink channel state information.
  • the variables Am and ⁇ m are the attenuation coefficient and the propagation delay of the propagation path, respectively. If the estimated values of the variables A m and ⁇ m with Substituting into equation (1), then the corresponding channel frequency response is expressed as:
  • ⁇ m represents the estimation error of the propagation delay of the m-th propagation path.
  • the nonlinear problem of the delay error ⁇ ′ m within the basic period [0, 2 ⁇ ] of the exponential function can be constructed as:
  • ⁇ (f a , f b ) represents the difference between the delay estimation errors ⁇ ′ m at two different frequencies; when M is unknown, the value of M is replaced by the estimated value.
  • the number V of estimated subcarriers is set equal to the number M of propagation paths.
  • V M
  • the coefficient matrix H′(f) formed by the estimated subcarriers is denoted as:
  • the adjacent estimated subcarriers should be such that there is no row between the rows of the matrix H′(f) when the estimated delay is unknown. Correlation or the lowest correlation between the rows of the matrix H'(f).
  • M integers may be randomly selected as the position index of the estimated sub-carrier in the interval [Q, U], where Q and U represent the lower and upper bounds of the downlink sub-carrier index, respectively.
  • the random seed for selecting the downlink subcarrier may be determined by the base station, and the user equipment may be notified during the feedback process or before the feedback operation is performed.
  • the size of I can be determined by the base station. Or it is determined by the user equipment according to the downlink status information.
  • N integers can be randomly selected as the index of unwrapping subcarriers in the interval [Q, U].
  • Q and U respectively represent the lower and upper bounds of the downlink sub-carrier index; the index of the unwrapped sub-carrier is different from the index of the estimated sub-carrier.
  • the base station determines the random seed, and informs the user during the feedback process or before the feedback operation is performed. The base station calculates the propagation delay estimation error by formula (6).
  • the estimated value of the attenuation coefficient is used Calculate the estimation error of the time delay Then, the attenuation coefficient is corrected by formula (7):
  • the with The calibration solution can be performed iteratively until the corresponding objective function converges within the acceptable range.
  • the parameters with Formula (1) calculates the expected frequency response of the downlink channel.
  • the second downlink channel state information data set may be calculated by the joint constraint of the first downlink channel state data set and the uplink channel state data set. For example, to construct an optimization problem for calculating the attenuation coefficient and propagation delay of the propagation path:
  • f is a frequency set of size K including uplink subcarriers and feedback downlink subcarriers, ⁇ l (l ⁇ 1,2,...,L ⁇ ) is uniform sampling in the time (delay) domain; operator
  • p represents the p norm.
  • the non-zero term S l in S represents the attenuation coefficient of the l-th propagation path, and the corresponding ⁇ l in B(f) represents the propagation delay of the l-th path.
  • the user determines the downlink subcarrier to be fed back according to the channel parameters calculated by the downlink channel response.
  • FIG. 6 is a schematic structural diagram of a downlink channel state information estimation apparatus provided by an embodiment of the present application; the method for estimating downlink channel state information provided by any embodiment of the present application can be executed, and has the functional modules and effects corresponding to the execution method.
  • the device may be implemented by software and/or hardware.
  • the device is generally integrated in a control node and includes: a detection sending module 310, an information receiving module 320, an information estimation module 330, and a range estimation module 340.
  • the sounding sending module 310 is configured to send downlink radio frames that carry channel sounding information.
  • the information receiving module 320 is configured to receive an uplink radio frame that carries the first downlink channel state information data set.
  • the information estimation module 330 is used to obtain an uplink channel state information data set.
  • the range estimation module 340 is configured to determine the second downlink channel state information data set.
  • the downlink radio frame carrying channel sounding information is sent to the user equipment through the sounding transmission module 310, the information receiving module 320 receives the uplink radio frame including the first downlink channel state information data set, and the information estimating module 330 estimates For the uplink channel state information data set, the range estimation module 340 determines the second downlink channel state information data set, which realizes the estimation of the downlink channel state information of the frequency division duplex system, reduces the amount of feedback of the downlink channel state information, and reduces the feedback of the system burden.
  • the channel sounding information in the sounding sending module 310 is a predefined sequence distributed on the determined transmission resource.
  • the first downlink channel state information data set in the information receiving module 320 includes channel state information of estimated subcarriers and unwrapped subcarriers.
  • the range estimation module 340 includes:
  • the information determining unit is configured to determine a second downlink channel state information data set through the uplink channel state information data set and the first downlink channel state information data set.
  • FIG. 7 is a schematic structural diagram of a downlink channel state information estimation device provided by an embodiment of the present application; the method for estimating downlink channel state information provided by any embodiment of the present application can be executed, and has the functional modules and effects corresponding to the execution method.
  • the device may be implemented by software and/or hardware.
  • the device is generally integrated in the user equipment and includes: a detection receiving module 410, an information determining module 420, and an information feedback module 430.
  • the detection receiving module 410 is configured to receive downlink radio frames carrying channel detection information.
  • the information determining module 420 is configured to determine the first downlink channel state information data set.
  • the information feedback module 430 is configured to feed back the uplink radio frame that carries the first downlink channel state information data set.
  • the downlink radio frame carrying channel sounding information is received by the detection receiving module 410, the information determining module 420 determines the first downlink channel state information data set, and the information feedback module 430 feeds back the first downlink channel state information data set.
  • the uplink radio frame reduces the amount of feedback of downlink channel state information, which can reduce the burden of system feedback.
  • the channel sounding information in the sounding receiving module 410 is a predefined sequence distributed on the determined transmission resource.
  • the first downlink channel state information data set in the information determining module 420 includes: channel state information of estimated subcarriers and unwrapped subcarriers.
  • the information feedback module 430 includes:
  • the parameter determination unit is used to estimate the propagation delay and attenuation coefficient of the propagation path according to the frequency response of the downlink channel.
  • the number of estimated subcarriers in the information determining module 420 is determined by the number of propagation paths of the channel.
  • the number of unwrapped subcarriers in the information determining module 420 is determined by the time delay search interval.
  • FIG. 8 is a schematic structural diagram of a device provided by an embodiment of the present application.
  • the device includes a processor 50, a memory 51, an input device 52, and an output device 53; the number of processors 50 in the device may be one Or more, one processor 50 is taken as an example in FIG. 8; the device processor 50, the memory 51, the input device 52, and the output device 53 may be connected by a bus or other means. In FIG. 8, the connection by a bus is taken as an example.
  • the memory 51 can be used to store software programs, computer-executable programs, and modules, such as the modules corresponding to the device in the embodiment of the present application (detection sending module 310, information receiving module 320, information estimation module 330, The range estimation module 340, the detection receiving module 410, the information determination module 420, and the information feedback module 430).
  • the processor 50 executes various functional applications and data processing of the device by running the software programs, instructions, and modules stored in the memory 51, that is, realizes the aforementioned downlink channel state information estimation method.
  • the memory 51 may mainly include a program storage area and a data storage area.
  • the program storage area may store an operating system and an application program required by at least one function; the data storage area may store data created according to the use of the terminal, and the like.
  • the memory 51 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state storage devices.
  • the memory 51 may include a memory remotely provided with respect to the processor 50, and these remote memories may be connected to the device through a network. Examples of the aforementioned networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.
  • the input device 52 can be used to receive inputted numeric or character information, and generate key signal input related to user settings and function control of the device.
  • the output device 53 may include a display device such as a display screen.
  • An embodiment of the present application also provides a computer-readable storage medium on which a computer program is stored, and the computer program is used to execute a method for estimating downlink channel state information when executed by a computer processor, the method including:
  • a computer-readable storage medium provided by an embodiment of the present application whose computer-executable instructions are not limited to the method operations described above, can also perform related operations in the downlink channel state information estimation method provided by any embodiment of the present application .
  • this application can be implemented by software and necessary general-purpose hardware, or can be implemented by hardware.
  • the technical solution of this application can essentially be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as a computer floppy disk, read-only memory (ROM), random access Random Access Memory (RAM), flash memory (FLASH), hard disk or optical disk, etc., including several instructions to make a computer device (which can be a personal computer, server, or network device, etc.) execute the various embodiments of this application Methods.
  • the units and modules included are only divided according to functional logic, but are not limited to the above division, as long as the corresponding function can be realized; in addition, each functional unit
  • the names are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application.
  • the term user terminal encompasses any suitable type of wireless user equipment, such as mobile phones, portable data processing devices, portable web browsers, or vehicular mobile stations.
  • the various embodiments of the present application can be implemented in hardware or dedicated circuits, software, logic or any combination thereof.
  • some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software that may be executed by a controller, microprocessor, or other computing device, although the present application is not limited thereto.
  • Computer program instructions can be assembly instructions, Instruction Set Architecture (ISA) instructions, machine instructions, machine-related instructions, microcode, firmware instructions, state setting data, or written in any combination of one or more programming languages Source code or object code.
  • ISA Instruction Set Architecture
  • the block diagram of any logic flow in the drawings of the present application may represent program steps, or may represent interconnected logic circuits, modules, and functions, or may represent a combination of program steps and logic circuits, modules, and functions.
  • the computer program can be stored on the memory.
  • the memory can be of any type suitable for the local technical environment and can be implemented using any suitable data storage technology, such as but not limited to read only memory (ROM), random access memory (RAM), optical storage devices and systems (digital multi-function optical discs) (Digital Video Disc, DVD) or Compact Disk (CD)), etc.
  • Computer-readable media may include non-transitory storage media.
  • the data processor can be any type suitable for the local technical environment, such as but not limited to general-purpose computers, special-purpose computers, microprocessors, digital signal processors (Digital Signal Processing, DSP), application specific integrated circuits (ASICs) ), programmable logic devices (Field-Programmable Gate Array, FPGA), and processors based on multi-core processor architecture.
  • DSP Digital Signal Processing
  • ASICs application specific integrated circuits
  • FPGA Field-Programmable Gate Array
  • FPGA Field-Programmable Gate Array

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Abstract

本文公开了一种下行信道状态信息估计方法、装置、设备和存储介质。该下行信道状态信息估计方法包括：发送承载信道探测信息的下行无线帧；接收承载第一下行信道状态信息数据集的上行无线帧；获取上行信道状态信息数据集；确定第二下行信道状态信息数据集。

Description

下行信道状态信息估计方法、装置、设备和存储介质 技术领域
本申请涉及无线通信网络领域，例如涉及一种下行信道状态信息估计方法、装置、设备和存储介质。
背景技术
毫米波和大规模多入多出(Multiple-Input Multiple-Output，MIMO)技术在为FDD(Frequency Division Duplex，频分双工)系统提供高系统传输容量的同时，也带来了下行信道状态信息反馈负担过重的问题。矛盾地，过重的反馈负担又将抑制系统容量的增长。上下行信道互易，即上行信道状态信息等同于下行信道状态信息，是消除高反馈负担的惯用方法。然而，上下行信道间频率的不同导致其不能被FDD系统所直接引用。
发明内容
本申请提供了一种下行信道状态信息估计方法、装置、设备和存储介质。
本申请实施例提供了一种下行信道状态信息估计方法，应用于控制节点，该方法包括：
发送承载信道探测信息的下行无线帧；接收承载第一下行信道状态信息数据集的上行无线帧；获取上行信道状态信息数据集；确定第二下行信道状态信息数据集。
本申请实施例提供了一种下行信道状态信息估计方法，应用于用户设备，所述方法包括：
接收承载信道探测信息的下行无线帧；确定第一下行信道状态信息数据集；反馈承载所述第一下行信道状态信息数据集的上行无线帧。
本申请实施例还提供了一种下行信道状态信息估计装置，应用于控制节点，该装置包括：
探测发送模块，用于发送承载信道探测信息的下行无线帧；信息接收模块，用于接收承载第一下行信道状态信息数据集的上行无线帧；信息估计模块，用于获取上行信道状态信息数据集；范围估计模块，用于确定第二下行信道状态信息数据集。
本申请实施例提供了一种下行信道状态信息估计装置，应用于用户设备，该装置包括：
探测接收模块，用于接收承载信道探测信息的下行无线帧；信息确定模块，用于确定第一下行信道状态信息数据集；信息反馈模块，用于反馈承载所述第一下行信道状态信息数据集的上行无线帧。
本申请实施例提供了一种设备，该设备包括：
一个或多个处理器；存储器，用于存储一个或多个程序，当所述一个或多个程序被所述一个或多个处理器执行，使得所述一个或多个处理器实现如本申请实施例中任一所述的下行信道状态信息估计方法。
本申请实施例提供了一种计算机可读存储介质，其上存储有计算机程序，其中，该程序被处理器执行时实现如本申请实施例中任一所述的下行信道状态信息估计方法。
本申请实施例，通过将承载有信道探测信息的下行无线帧发送到用户设备，并接收包括第一下行信道状态信息数据集的上行无线帧，获取上行信道状态信息数据集，确定第二下行信道状态信息数据集，实现了频分双工系统下行信道状态信息的估计，减少了下行信道状态信息反馈量，进而降低了系统的反馈负担。
附图说明
图1是本申请实施例提供的一种下行信道状态信息估计方法的流程图；
图2是本申请实施例提供的一种信道状态参考信号的时频分布示例图；
图3是本申请实施例提供的一种下行信道状态信息估计方法的流程图；
图4是本申请实施例提供的一种下行信道状态信息估计方法的示例图；
图5是本申请实施例提供的一种下行信道状态信息估计方法的帧序列交互示例图；
图6是本申请实施例提供的一种下行信道状态信息估计装置的结构示意图；
图7是本申请实施例提供的一种下行信道状态信息估计装置的结构示意图；
图8是本申请实施例提供的一种设备的结构示意图。
具体实施方式
下文中将结合附图对本申请的实施例进行说明。
在FDD系统中，尽管频率响应互易不成立，但上下行信道之间传播路径的强相关性却使得脉冲响应互易成立。也就是说，如果基站能够通过上行信道状态信息计算出对应的脉冲响应，那么下行信道状态信息也就可以被获得。为了克服在实际应用过程中存在的不确定性，用户首先需要向基站反馈少量下行信道状态信息。然后基站在反馈的下行信道状态信息和已知的上行信道状态信息的共同约束下确定未被反馈的下行信道状态信息。最终反馈负担因反馈需求的改变而得以减轻。
图1是本申请实施例提供的一种下行信道状态信息估计方法的流程图，本申请实施例可适用于对FDD系统中的下行信道状态信息进行估计的情况，该方法可以由本申请实施例中的下行信道状态信息估计装置来执行，该装置可以由软件和/或硬件的方式来实现，并一般集成在控制节点中，控制节点可以控制用户设备的无线设备，包括基站和接入点等，本申请实施例的方法包括如下步骤：
步骤110、发送承载信道探测信息的下行无线帧。
信道探测信息是在确定传输资源上的预定义序列。信道探测信息承载的介质为下行无线帧，用于探测下行信道的信道状态信息，该信道探测信息通过下行无线帧从控制节点下发到用户设备。
信道探测信息是分布在确定传输资源上的预定义序列。
预定义序列是具有特定含义的符号序列，接收方和发送方可以在发送前预先约定该预定义序列的含义。示例性的，预定义序列由{-1、0、1}三种符号组成，一个预定义序列可以是{1 1 -1 -1 1 1 -1 1 -1 1 1 1 1 1 1 -1 -1 1 1 -1 1 -1 1 -1 1 1 1 1 0 1 -1 -1 -1 1 1 -1 1 -1 1 -1 -1 -1 -1 -1 1 1-1 -1 1 -1 1-1 1 1 1 1}。
在本申请实施例中，预定义序列至少包括信道状态参考信号和解调参考信号中的一种。
在上述申请实施例的基础上，传输资源包括时间、频率、空间、功率以及码字资源中的至少一种。
示例性的，图2是本申请实施例提供的一种信道状态参考信号的时频分布示例图，基站以确定的时间间隔和频率间隔发送的信道状态参考信息如图2所示。
步骤120、接收承载第一下行信道状态信息数据集的上行无线帧。
上行无线帧是用户设备发送到控制节点的无线帧信息，上行无线帧内包括有下行信道的状态信息。下行信道状态信息包括信道频率响应。
在一个示例性的实施方式中，控制节点在发送承载信道探测信息的下行无 线帧后，可以监听用户设备发送的上行无线帧，并获取到上行无线帧内的第一下行信道状态信息数据集。其中，第一下行信道状态信息数据集由部分下行子载波的信道状态信息构成。
步骤130、获取上行信道状态信息数据集。
在本申请实施例中，上行信道状态信息数据集由上行无线帧估计获得。
在另一个示例性的实施方式中，使用保存的上行信道状态的历史值形成上行信道状态信息数据集。
本申请实施例中，步骤120和步骤130仅用于区分执行步骤，不用于对步骤的先后执行顺序进行限制，步骤130可以先于步骤120之前执行，步骤120和步骤130也可以同时执行。
步骤140、确定第二下行信道状态信息数据集。
第二下行信道状态信息数据集与第一下行信道状态信息数据集对应的下行子载波不同。
在本申请实施例中，通过上行信道状态信息数据集和第一下行信道状态信息数据集确定第二下行信道状态信息数据集。
在一个示例性的实施方式中，基于上行信道状态信息数据集估计传播路径的传播时延和衰减系数等参数；使用用户设备反馈的第一下行信道状态信息数据集校正估计出的传播时延和衰减系数等参数；使用校正后的参数计算第二下行信道状态信息数据集。在本实施例中所述第一下行信道状态信息数据集包括估计子载波和解卷绕子载波的信道状态信息。用户设备向控制节点反馈的第一下行信道状态信息数据集包括估计子载波和解卷子载波两部分的信道状态信息。估计子载波的信道状态信息用于在基础周期内计算传播路径的传播时延和衰减系数等参数的基础值，其中，基础周期是指[0,2π]。解卷绕子载波的信道状态信息用于在多基础周期范围内的由参数基础值生成的集合中筛选出符合要求的参数项。其中，多基础周期是指[-2jπ,0]∪[2π,2kπ]，其中，k和j分别是大于1和0的整数。在上述申请实施例的基础上，所述估计子载波和解卷绕子载波随机分布于下行信道所在的频率范围内。
在另一个示例性的实施方式中，使用第一下行信道状态信息数据集和上行信道状态信息数据集联合估计传播路径的传播时延和衰减系数等参数；使用联合估计出的参数计算第二下行信道状态信息数据集。
在上述申请实施例的基础上，所述估计子载波的数量由下行信道中传播路径的数量确定。
在上述申请实施例的基础上，所述解卷绕子载波的数量由时延搜索区间确定。
在本申请实施例中，时延搜索区间可以由控制节点确定，并将确定的时延搜索区间发送到用户设备。时延搜索区间也可以由用户设备确定，并将确定的时延搜索区间发送到控制节点。
图3是本申请实施例提供的一种下行信道状态信息估计方法的流程图，本申请实施例可适用于FDD系统中对下行信道状态信息进行估计的情况，该方法可以由本申请实施例中的下行信道状态信息估计装置来执行，该装置可以由软件和/或硬件的方式来实现，并一般集成在用户设备中，本申请实施例的方法包括如下步骤：
步骤210、接收承载信道探测信息的下行无线帧。
用户设备接收控制节点下发的下行无线帧，其中，该下行无线帧内包括信道探测信息。信道探测信息可以为信道状态参考信号和/或解调参考信号，信道探测信息可以用于探测下行信道状态，以获取控制节点到用户设备的信道频率响应。
在上述申请实施例的基础上，所述信道探测信息是分布在确定传输资源上的预定义序列。
步骤220、确定第一下行信道状态信息数据集。
第一下行信道状态信息数据集是由下行信道的状态信息组成的数据集合。
在本申请实施例中，通过用户设备可以随机选择下行子载波，获取对应下行子载波的信道状态信息，将获取到的下行子载波的信道状态信息作为第一下行信道状态信息数据集。
在上述申请实施例的基础上，所述第一下行信道状态信息数据集包括估计子载波和解卷绕子载波的信道状态信息。
步骤230、反馈承载所述第一下行信道状态信息数据集的上行无线帧。
用户设备将第一下行信道状态信息数据通过上行无线帧发送到控制节点。
本申请实施例，通过接收承载信道探测信息的下行无线帧，确定下行信道状态信息数据集，反馈承载有下行信道状态信息数据集的上行无线帧。
在上述申请实施例的基础上，确定下行信道状态信息，包括：
根据下行信道的频率响应估计传播路径的传播时延和衰减系数。
用户设备获取下行无线信道的频率响应，根据频率响应计算出对应的传播 路径的传播时延和衰减系数。
在上述申请实施例的基础上，所述估计子载波的数量由信道的传播路径的数量决定。
在本申请实施例中，确定第一下行信道状态信息数据集时，第一下行信道状态信息数据集中的估计子载波的信道状态信息的数量与传播路径的数量相对应，例如，估计子载波的数量等于传播路径的数量。在下行信道中可以通过随机选择子载波索引和/或子载波位置的方式选择估计子载波，并将对应的信道状态信息存储到第一下行信道状态信息数据集。
在上述申请实施例的基础上，所述解卷绕子载波的数量由时延搜索区间确定。
用户设备基于时延搜索区间确定解卷绕子载波的数量。一般，时延搜索区间越大，选择的解卷绕子载波的数量就越多，其中，时延搜索区间可以由控制节点确定，并由控制节点将时延搜索区间发送到用户设备。第一下行信道状态信息数据集中的解卷绕子载波，由随机选择子载波索引和/或子载波位置的方式获得。
在一个示例性实施方式中，图4是本申请实施例提供的一种下行信道状态信息估计方法的示例图，参见图4，在FDD系统中基站向用户端发送携带有信道探测信息的下行无线帧，用户设备根据下行无线帧获取下行信道状态信息。用户设备在对应的上行传输资源上向基站发送携带有下行信道状态信息的上行无线帧。基站接收到用户发送的上行无线帧后，估计上行信道状态信息，然后在反馈的下行信道状态信息的约束下，计算已知反馈的下行子载波之外的其它下行子载波的信道状态信息。参见图5，基站和用户设备之间通过承载信道探测信息的下行无线帧和承载下行信道状态信息的上行无线帧实现信息交互。
一个示例性的实施方式中，假设信道的传播路径有M条，根据时延抽头模型和傅里叶变换，信道的频率响应与传播路径之间的关系可以被描述如下式：
Figure PCTCN2021077083-appb-000001
其中，变量A m和τ m分别是传播路径的衰减系数和传播时延。如果将变量A m和τ m的估计值
Figure PCTCN2021077083-appb-000002
和
Figure PCTCN2021077083-appb-000003
代入式(1)中，那么相应的信道频率响应表示为：
Figure PCTCN2021077083-appb-000004
其中，Δτ m表示第m条传播路径的传播时延的估计误差。
在衰减系数的估计误差可忽略的前提下，式(1)可被改写为：
Figure PCTCN2021077083-appb-000005
其中，
Figure PCTCN2021077083-appb-000006
如果已知V个下行子载波对应的频率响应，那么在指数函数的基础周期[0,2π]内关于时延误差Δτ′ m的非线性问题可被构造为：
Figure PCTCN2021077083-appb-000007
其中，ψ(f a,f b)代表两不同频率处时延估计误差Δτ′ m之间的差值；当M未知时，M的取值由估计值替代。
为了降低求解的不确定性，设置估计子载波的数量V等于传播路径的数量M。当V＝M时，由估计子载波所构成的系数矩阵H′(f)记为：
Figure PCTCN2021077083-appb-000008
因为传播时延的估计误差存在唯一解的必要条件是矩阵H′(f)满秩，所以在估计时延未知的情况下相邻估计子载波应使得矩阵H′(f)各行之间不存在相关性或者使得矩阵H′(f)各行之间相关性最低。在一实施例中，可以在区间[Q,U]内随机选择M个整数作为估计子载波的位置索引，其中，Q和U分别代表下行子载波索引的下界和上界。可选的，选择下行子载波的随机种子可由基站决定，并在反馈过程中或反馈操作执行之前通知用户设备。
因为时延估计误差与频率之积所张成的空间通常为[-2jπ,0]∪[2π,2kπ]，其中，k和j分别是大于1和0的整数，所以用户需要反馈新的子载波(本申请中将其命名为解卷绕子载波)和对应的频率响应H(f n),f n≠f v来降低周期性带来的求解不确定性。与该想法相对应的优化问题可以是：
Figure PCTCN2021077083-appb-000009
其中，符号Z表示由整数构成的集合，它由I个整数组成；解卷绕子载波的数量N是传播路径数量M和I的函数，即N＝Φ(M,I)。可选的，I的大小可以由基站决定。或者由用户设备根据下行状态信息决定。在一实施例中，可以在区间[Q,U]内随机选择N个整数作为解卷绕子载波的索引。其中，Q和U分别表示下行子载波索引的下界和上界；解卷绕子载波的索引与估计子载波的索引不相同。可选的，基站决定随机种子，并在反馈过程中或反馈操作执行之前通知用户。基站通过式(6)计算出传播时延的估计误差。
若衰减系数的估计误差不能被忽略，则在使用衰减系数的估计值
Figure PCTCN2021077083-appb-000010
计算出时延的估计误差
Figure PCTCN2021077083-appb-000011
后，通过式(7)对衰减系数进行校正：
Figure PCTCN2021077083-appb-000012
实际上，在已有估计结果的支持下，对
Figure PCTCN2021077083-appb-000013
和
Figure PCTCN2021077083-appb-000014
校准求解可迭代进行直至相应的目标函数收敛至可接受的范围之内。最后，将参数
Figure PCTCN2021077083-appb-000015
和
Figure PCTCN2021077083-appb-000016
式(1)中计算出期望的下行信道的频率响应。
在一个示例性的实施方式中，可以通过第一下行信道状态数据集和上行信道状态数据集的联合约束计算第二下行信道状态信息数据集。例如构造用于计算传播路径的衰减系数和传播时延的优化问题：
Figure PCTCN2021077083-appb-000017
其中，完备集
Figure PCTCN2021077083-appb-000018
f是包括上行子载波和反馈的下行子载波的大小为K的频率集合，τ l(l∈{1,2,...,L})是时(延)域上的均匀采样；运算符||·|| p表示p范数。S中的非零项S l表示第l条传播路径的衰减系数，B(f)中相对应的τ l表示第l条径的传播时延。可选的，用户根据下行信道响应计算出的信道参数决定待反馈的下行子载波。在一实施例中，待反馈的下行子载波
Figure PCTCN2021077083-appb-000019
其中，
Figure PCTCN2021077083-appb-000020
和
Figure PCTCN2021077083-appb-000021
分别是传播路径的传播时延和衰减系数的估计值。
图6是本申请实施例提供的一种下行信道状态信息估计装置的结构示意图；可执行本申请任意实施例所提供的下行信道状态信息估计方法，具备执行方法相应的功能模块和效果。该装置可以由软件和/或硬件实现，该装置一般集成在控制节点，包括：探测发送模块310、信息接收模块320、信息估计模块330和范围估计模块340。
探测发送模块310，用于发送承载信道探测信息的下行无线帧。
信息接收模块320，用于接收承载第一下行信道状态信息数据集的上行无线帧。
信息估计模块330，用于获取上行信道状态信息数据集。
范围估计模块340，用于确定第二下行信道状态信息数据集。
本申请实施例，通过探测发送模块310将承载有信道探测信息的下行无线帧发送到用户设备，信息接收模块320接受包括第一下行信道状态信息数据集的上行无线帧，信息估计模块330估计上行信道状态信息数据集，范围估计模块340确定第二下行信道状态信息数据集，实现了频分双工系统下行信道状态信息的估计，减少了下行信道状态信息的反馈量，降低了系统的反馈负担。
在上述申请实施例的基础上，探测发送模块310中的所述信道探测信息是分布在确定传输资源上的预定义序列。
在上述申请实施例的基础上，信息接收模块320中的第一下行信道状态信息数据集包括估计子载波和解卷绕子载波的信道状态信息。
在上述申请实施例的基础上，范围估计模块340包括：
信息确定单元，用于通过所述上行信道状态信息数据集和所述第一下行信道状态信息数据集确定第二下行信道状态信息数据集。
图7是本申请实施例提供的一种下行信道状态信息估计装置的结构示意图；可执行本申请任意实施例所提供的下行信道状态信息估计方法，具备执行方法相应的功能模块和效果。该装置可以由软件和/或硬件实现，该装置一般集成在用户设备，包括：探测接收模块410、信息确定模块420和信息反馈模块430。
探测接收模块410，用于接收承载信道探测信息的下行无线帧。
信息确定模块420，用于确定第一下行信道状态信息数据集。
信息反馈模块430，用于反馈承载所述第一下行信道状态信息数据集的上行无线帧。
本申请实施例，通过探测接收模块410接收承载信道探测信息的下行无线帧，信息确定模块420确定第一下行信道状态信息数据集，信息反馈模块430 反馈承载第一下行信道状态信息数据集的上行无线帧，减少了下行信道状态信息的反馈量，可降低系统反馈负担。
在上述申请实施例的基础上，探测接收模块410中的所述信道探测信息是分布在确定传输资源上的预定义序列。
在上述申请实施例的基础上，信息确定模块420中的第一下行信道状态信息数据集包括：估计子载波和解卷绕子载波的信道状态信息。
在上述申请实施例的基础上，信息反馈模块430包括：
参数确定单元，用于根据下行信道的频率响应估计传播路径的传播时延和衰减系数。
在上述申请实施例的基础上，信息确定模块420中估计子载波的数量由信道的传播路径的数量决定。
在上述申请实施例的基础上，信息确定模块420中解卷绕子载波的数量由时延搜索区间确定。
图8是本申请实施例提供的一种设备的结构示意图，如图8所示，该设备包括处理器50、存储器51、输入装置52和输出装置53；设备中处理器50的数量可以是一个或多个，图8中以一个处理器50为例；设备处理器50、存储器51、输入装置52和输出装置53可以通过总线或其他方式连接，图8中以通过总线连接为例。
存储器51作为一种计算机可读存储介质，可用于存储软件程序、计算机可执行程序以及模块，如本申请实施例中装置对应的模块(探测发送模块310、信息接收模块320、信息估计模块330、范围估计模块340、探测接收模块410、信息确定模块420和信息反馈模块430)。处理器50通过运行存储在存储器51中的软件程序、指令以及模块，从而执行设备的各种功能应用以及数据处理，即实现上述的下行信道状态信息估计方法。
存储器51可主要包括存储程序区和存储数据区，其中，存储程序区可存储操作系统、至少一个功能所需的应用程序；存储数据区可存储根据终端的使用所创建的数据等。此外，存储器51可以包括高速随机存取存储器，还可以包括非易失性存储器，例如至少一个磁盘存储器件、闪存器件、或其他非易失性固态存储器件。在一些实例中，存储器51可包括相对于处理器50远程设置的存储器，这些远程存储器可以通过网络连接至设备。上述网络的实例包括但不限于互联网、企业内部网、局域网、移动通信网及其组合。
输入装置52可用于接收输入的数字或字符信息，以及产生与设备的用户设置以及功能控制有关的键信号输入。输出装置53可包括显示屏等显示设备。
本申请实施例还提供一种计算机可读存储介质，其上存储有计算机程序，所述计算机程序在由计算机处理器执行时用于执行一种下行信道状态信息估计方法，该方法包括：
发送承载信道探测信息的下行无线帧；接收承载第一下行信道状态信息数据集的上行无线帧；获取上行信道状态信息数据集；确定第二下行信道状态信息数据集。
和/或
接收承载信道探测信息的下行无线帧；确定第一下行信道状态信息数据集；反馈承载所述第一下行信道状态信息数据集的上行无线帧。
本申请实施例所提供的一种计算机可读存储介质，其计算机可执行指令不限于如上所述的方法操作，还可以执行本申请任意实施例所提供的下行信道状态信息估计方法中的相关操作。
通过以上关于实施方式的描述，本申请可借助软件及必需的通用硬件来实现，也可以通过硬件实现。本申请的技术方案本质上可以以软件产品的形式体现出来，该计算机软件产品可以存储在计算机可读存储介质中，如计算机的软盘、只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、闪存(FLASH)、硬盘或光盘等，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述的方法。
上述下行信道状态信息估计装置的实施例中，所包括的各个单元和模块只是按照功能逻辑进行划分的，但并不局限于上述的划分，只要能够实现相应的功能即可；另外，各功能单元的名称也只是为了便于相互区分，并不用于限制本申请的保护范围。
术语用户终端涵盖任何适合类型的无线用户设备，例如移动电话、便携数据处理装置、便携网络浏览器或车载移动台。
一般来说，本申请的多种实施例可以在硬件或专用电路、软件、逻辑或其任何组合中实现。例如，一些方面可以被实现在硬件中，而其它方面可以被实现在可以被控制器、微处理器或其它计算装置执行的固件或软件中，尽管本申请不限于此。
本申请的实施例可以通过移动装置的数据处理器执行计算机程序指令来实现，例如在处理器实体中，或者通过硬件，或者通过软件和硬件的组合。计算机程序指令可以是汇编指令、指令集架构(Instruction Set Architecture，ISA)指令、机器指令、机器相关指令、微代码、固件指令、状态设置数据、或者以一 种或多种编程语言的任意组合编写的源代码或目标代码。
本申请附图中的任何逻辑流程的框图可以表示程序步骤，或者可以表示相互连接的逻辑电路、模块和功能，或者可以表示程序步骤与逻辑电路、模块和功能的组合。计算机程序可以存储在存储器上。存储器可以具有任何适合于本地技术环境的类型并且可以使用任何适合的数据存储技术实现，例如但不限于只读存储器(ROM)、随机访问存储器(RAM)、光存储器装置和系统(数码多功能光碟(Digital Video Disc，DVD)或光盘(Compact Disk，CD))等。计算机可读介质可以包括非瞬时性存储介质。数据处理器可以是任何适合于本地技术环境的类型，例如但不限于通用计算机、专用计算机、微处理器、数字信号处理器(Digital Signal Processing，DSP)、专用集成电路(Application Specific Integrated Circuit，ASIC)、可编程逻辑器件(Field-Programmable Gate Array，FPGA)以及基于多核处理器架构的处理器。

Claims (14)

  1. 一种下行信道状态信息估计方法，应用于控制节点，包括：
    发送承载信道探测信息的下行无线帧；
    接收承载第一下行信道状态信息数据集的上行无线帧；
    获取上行信道状态信息数据集；
    确定第二下行信道状态信息数据集。
  2. 根据权利要求1所述的方法，其中，所述信道探测信息是分布在确定传输资源上的预定义序列。
  3. 根据权利要求1所述的方法，其中，所述第一下行信道状态信息数据集包括估计子载波和解卷绕子载波的信道状态信息。
  4. 根据权利要求1所述的方法，其中，所述确定第二下行信道状态信息数据集，包括：
    通过所述上行信道状态信息数据集和所述第一下行信道状态信息数据集确定所述第二下行信道状态信息数据集。
  5. 一种下行信道状态信息估计方法，应用于用户设备，包括：
    接收承载信道探测信息的下行无线帧；
    确定第一下行信道状态信息数据集；
    反馈承载所述第一下行信道状态信息数据集的上行无线帧。
  6. 根据权利要求5所述的方法，其中，所述信道探测信息是分布在确定传输资源上的预定义序列。
  7. 根据权利要求5所述的方法，其中，所述第一下行信道状态信息数据集包括估计子载波和解卷绕子载波的信道状态信息。
  8. 根据权利要求5所述的方法，其中，所述确定第一下行信道状态信息数据集，包括：
    根据下行信道的频率响应估计传播路径的传播时延和衰减系数。
  9. 根据权利要求7所述的方法，其中，所述估计子载波的数量由信道的传播路径的数量决定。
  10. 根据权利要求7所述的方法，其中，所述解卷绕子载波的数量由时延搜索区间确定。
  11. 一种下行信道状态信息估计装置，应用于控制节点，包括：
    探测发送模块，设置为发送承载信道探测信息的下行无线帧；
    信息接收模块，设置为接收承载第一下行信道状态信息数据集的上行无线帧；
    信息估计模块，设置为获取上行信道状态信息数据集；
    范围估计模块，设置为确定第二下行信道状态信息数据集。
  12. 一种下行信道状态信息估计装置，应用于用户设备，包括：
    探测接收模块，设置为接收承载信道探测信息的下行无线帧；
    信息确定模块，设置为确定第一下行信道状态信息数据集；
    信息反馈模块，设置为反馈承载所述第一下行信道状态信息数据集的上行无线帧。
  13. 一种设备，包括：
    至少一个处理器；
    存储器，设置为存储至少一个程序；
    当所述至少一个程序被所述至少一个处理器执行，使得所述至少一个处理器实现如权利要求1-10中任一项所述的下行信道状态信息估计方法。
  14. 一种计算机可读存储介质，存储有计算机程序，其中，所述程序被处理器执行时实现如权利要求1-10中任一项所述的下行信道状态信息估计方法。
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