WO2011147337A1 - 发送物理资源块、及信道估计的方法、基站和用户设备 - Google Patents

发送物理资源块、及信道估计的方法、基站和用户设备 Download PDF

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Publication number
WO2011147337A1
WO2011147337A1 PCT/CN2011/075217 CN2011075217W WO2011147337A1 WO 2011147337 A1 WO2011147337 A1 WO 2011147337A1 CN 2011075217 W CN2011075217 W CN 2011075217W WO 2011147337 A1 WO2011147337 A1 WO 2011147337A1
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WO
WIPO (PCT)
Prior art keywords
demodulation pilot
prbs
pilot
base station
user equipment
Prior art date
Application number
PCT/CN2011/075217
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English (en)
French (fr)
Inventor
周永行
孙卫军
刘昆鹏
Original Assignee
华为技术有限公司
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP11786109.6A priority Critical patent/EP2584748B1/en
Publication of WO2011147337A1 publication Critical patent/WO2011147337A1/zh
Priority to US13/742,899 priority patent/US9001765B2/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/02Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202Channel estimation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/02Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202Channel estimation
    • H04L25/0204Channel estimation of multiple channels
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/02Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202Channel estimation
    • H04L25/0224Channel estimation using sounding signals
    • H04L25/0226Channel estimation using sounding signals sounding signals per se
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048Allocation of pilot signals, i.e. of signals known to the receiver
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal

Definitions

  • the present invention relates to the field of communications, and in particular, to a method for transmitting a physical resource block, and channel estimation, a base station, and a user equipment.
  • BACKGROUND OF THE INVENTION Multi-antenna technology can make full use of the spatial resources of signals to meet the demand for higher peak rates without increasing bandwidth.
  • the main process can be simply expressed as: the serial data stream at the transmitting end forms a plurality of sub-information streams after some necessary space-time processing, and is transmitted by multiple antennas, and then the data stream is recovered by the detecting technology at the receiving end.
  • CSI channel s te telecommunications information
  • Channel estimation can now be divided into two methods: blind estimation and training sequence based estimation.
  • the sequence-based channel estimation method generally inserts a certain number of pilots into a data packet at the transmitting end, and the receiving end first estimates the channel coefficients at the known pilots, and then uses some channel estimation algorithm to interpolate. The channel coefficients at the data, which in turn perform data equalization and decoding. The number of pilots, the location, the sequence used, etc. will all affect the channel estimation performance.
  • PRBs Physical Resource Blocks
  • PRB bundling physical resource block joint channel estimation
  • Embodiments of the present invention provide a method for transmitting a physical resource block and a channel estimation, a base station, and a user equipment, which implements an adjustment of an adaptive pilot structure based on a configured number of joint PRBs, and optimizes system performance.
  • An embodiment of the present invention provides a method for sending a physical resource block, including:
  • the base station allocates M physical resource blocks (PRBs) for the user equipment, and configures a pilot pattern for the M PRBs.
  • the method for configuring the pilot pattern includes:
  • X is the number of demodulation pilot subcarriers included in the pilot pattern of the single PRB when the base station allocates a single PRB for channel estimation by the base station; M is a positive integer greater than 1; N is greater than 1 And a positive integer less than or equal to 12/(X+1); the demodulation pilot subcarrier refers to a subcarrier used to carry a demodulation pilot; the first demodulation pilot pattern refers to the base station as a Demodulating a pilot pattern used by the user equipment to allocate a single PRB for channel estimation;
  • An embodiment of the present invention provides another method for sending a physical resource block, including:
  • the base station allocates two physical resource blocks (PRBs) for the user equipment, and configures a pilot pattern for the two PRBs.
  • the method for configuring the pilot pattern includes: Allocating 5 demodulation pilot subcarriers in the frequency domain for the 1 PRB, and (-2, 2] subcarriers at the boundary of the 2 PRBs based on the boundary line of the 1 PRB Only one demodulation pilot subcarrier is configured in the range, and the positions of the remaining 4 demodulation pilot subcarriers and the position of the demodulation pilot subcarriers in the 2 consecutive first demodulation pilot patterns in the frequency domain are maintained. Consistent
  • the demodulation pilot subcarrier refers to a subcarrier used to carry a demodulation pilot.
  • the first demodulation pilot pattern is used when the base station allocates a single PRB to the user equipment for channel estimation. Demodulating the pilot pattern;
  • the embodiment of the invention provides another method for sending a physical resource block, including:
  • the base station allocates three physical resource blocks (PRBs) for the user equipment, and configures a pilot pattern for the three PRBs.
  • the method for configuring the pilot pattern includes:
  • the demodulation pilot subcarrier refers to a subcarrier used to carry a demodulation pilot.
  • the first demodulation pilot pattern is used when the base station allocates a single PRB to the user equipment for channel estimation. Demodulating the pilot pattern;
  • the embodiment of the invention further provides a channel estimation method, including:
  • the user equipment receives M physical resource blocks (PRBs) for joint channel estimation sent by the base station, where the M PRBs include (X-1) M+1 demodulation pilot subcarriers, and each of the two The boundary line of the PRB is the reference, and only the range of (_N, N) subcarriers at every two PRB junctions is included. Demodulating the pilot subcarriers, and demodulating the pilot subcarriers in the positions of the remaining (X-2) M+2 demodulation pilot subcarriers and the M consecutive first demodulation pilot patterns in the frequency domain The position remains the same;
  • X is the number of demodulation pilot subcarriers included in the pilot pattern of the single PRB when the base station allocates a single PRB for channel estimation by the base station; M is a positive integer greater than 1; N is greater than 1 And a positive integer less than or equal to 12/(X+1); the demodulation pilot subcarrier refers to a subcarrier used to carry a demodulation pilot; the first demodulation pilot pattern refers to the base station as a Demodulating a pilot pattern used by the user equipment to allocate a single PRB for channel estimation;
  • the user equipment acquires a received signal value of the demodulation pilot from the demodulation pilot subcarriers of the M PRBs, and estimates a channel coefficient of the demodulation pilot position according to the received signal value of the demodulation pilot; And determining a channel coefficient of the data position in the M PRBs by using a channel coefficient of the demodulation pilot position and a relative positional relationship between the demodulation pilot and the data.
  • An embodiment of the present invention provides a base station, including:
  • a configuration unit configured to: allocate, by the user equipment, the M physical resource blocks (PRBs), and configure the pilot patterns for the M PRBs according to the first manner, where the first manner includes:
  • X is the number of demodulation pilot subcarriers included in the pilot pattern of the single PRB when the base station allocates a single PRB for channel estimation by the base station; M is a positive integer greater than 1; N is greater than 1 And a positive integer less than or equal to 12/(X+1); the demodulation pilot subcarrier refers to a subcarrier used to carry a demodulation pilot; the first demodulation pilot pattern refers to the base station as a Demodulating a pilot pattern used by the user equipment to allocate a single PRB for channel estimation;
  • a sending unit configured to send, to the user equipment, the M PRBs configured by the configuration unit, so that the user equipment performs joint channel estimation according to the configured M PRBs.
  • the embodiment of the invention provides a user equipment, including:
  • M physical resource blocks (PRBs) for joint channel estimation where the M PRBs include (X-1) M+1 demodulation pilot subcarriers, and each of the two The boundary line of the PRBs is referenced, and only one demodulation pilot subcarrier is included in the range of (_N, N) subcarriers at every two PRB junctions, and the remaining (X-2) M+2 demodulation guides
  • the position of the frequency subcarrier is consistent with the position of the demodulated pilot subcarrier in the M consecutive first demodulation pilot patterns in the frequency domain;
  • X is the number of demodulation pilot subcarriers included in the pilot pattern of the single PRB when the base station allocates a single PRB for channel estimation by the base station; M is a positive integer greater than 1; N is greater than 1 And a positive integer less than or equal to 12/(X+1); the demodulation pilot subcarrier refers to a subcarrier used to carry a demodulation pilot; the first demodulation pilot pattern refers to the base station as a Demodulating a pilot pattern used by the user equipment to allocate a single PRB for channel estimation;
  • a channel estimation unit configured to obtain a received signal value of the demodulation pilot from the demodulation pilot subcarriers of the M PRBs received by the receiving unit, and estimate a demodulation pilot according to the received signal value of the demodulation pilot a channel coefficient of the position; a channel coefficient of the data position in the M PRBs is obtained by using a channel coefficient of the demodulation pilot position and a relative positional relationship between the demodulation pilot and the data.
  • the pilot pattern configuration manner when scheduling multiple PRBs for joint channel estimation, the pilot pattern configuration manner is appropriately adjusted to achieve the purpose of increasing service data transmission efficiency without changing channel estimation accuracy.
  • the overhead of the pilot is saved, and the data transmission rate is optimized.
  • the overhead and pattern of the pilot will undergo adaptive changes to achieve the purpose of optimizing the data transmission rate. Therefore, the problem that the pilot structure remains unchanged and the performance is limited when multiple PRB joint channel estimation is effectively solved is effectively solved.
  • FIG. 1 is a flowchart of a method for transmitting a physical resource block according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a pilot pattern in a single PRB in the prior art
  • FIG. 3 is a schematic diagram of a pilot pattern in a PRB bundling scenario according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of a pilot pattern in another PRB bundling scenario according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a pilot pattern in a PRB bundling scenario according to an embodiment of the present invention.
  • FIG. 6 is a flowchart of a method for performing channel estimation by a user equipment according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a base station according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of a user equipment according to an embodiment of the present invention.
  • the technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention.
  • the embodiments are a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.
  • an embodiment of the present invention provides a method for transmitting a physical resource block, including: Step 101: A base station schedules M physical resource blocks (PRBs) for a user equipment, and configures a pilot pattern for M PRBs.
  • the method for configuring a pilot pattern includes:
  • the position of the demodulation pilot subcarrier is consistent; where X is the number of demodulation pilot subcarriers included in the pilot pattern of the single PRB when the base station allocates a single PRB for channel estimation by the user equipment; M is greater than 1 Positive integer; N is greater than a positive integer that is less than or equal to 12/(X+1); the demodulation pilot subcarrier refers to a subcarrier used to carry a demodulation pilot; the first demodulation pilot pattern refers to a base station assigning a single to a user equipment. a demodulation pilot pattern used by the PRB for channel estimation;
  • the only one demodulation pilot subcarrier in the range of (-N, N) subcarriers at every two PRB interfaces may be The distances between the two adjacent demodulation pilot subcarriers are equal.
  • Step 102 Send the configured M PRBs to the user equipment, so that the user equipment performs joint channel estimation according to the configured M PRBs.
  • the following provides a description of the method provided by the embodiment of the present invention by using the demodulation pilot pattern used in the channel estimation for the user equipment in the prior art as the first demodulation pilot pattern as an example:
  • a demodulation pilot pattern used for channel estimation using a single PRB in an existing LTE-A (Long Term Evolution-Advanced) system includes: 14*12 REs (resource element) , resource unit), the shaded part represents CRS (Common Reference Signal), and the shaded part of gray represents different DMRS (Dedicated Demodulation Reference Signal, hereinafter referred to as "Demodulation Pilot").
  • the demodulation pilot subcarrier refers to a subcarrier used to carry a demodulation pilot in the frequency domain.
  • the value of M is 2, the value of N is 2, and the value of X is 3.
  • the pilot pattern configured according to the method provided by the embodiment of the present invention may be as shown in FIG.
  • the part represents the CRS (Common Reference Signal), and the gray shaded part represents the Dedicated Demodulation Reference Signal. It can be seen that there is only one solution in the interval of the PRB (-N, N).
  • the pilot subcarrier is adjusted, and when the demodulation pilot subcarrier is equal to the distance between the upper and lower two demodulation pilot subcarriers, better channel estimation performance can be obtained.
  • the value of M is 3, and the value of N is 1 X, and the value is 3, which is provided according to the embodiment of the present invention.
  • the pilot pattern after the configuration is as shown in FIG. 4, wherein the shaded portion represents the CRS and the gray shaded portion represents the different RS.
  • pilot configuration mode when M takes a larger value can be introduced according to the above method, and details are not described herein again.
  • the embodiment of the present invention when scheduling multiple PRBs for joint channel estimation, the pilot pattern configuration manner is appropriately adjusted to achieve the purpose of increasing service data transmission efficiency without changing the channel estimation accuracy. At the same time, the overhead of the pilot is saved, and the data transmission rate is optimized. And when channel estimation is performed jointly with different numbers of PRBs, the overhead and pattern of the pilot will be adaptively changed to achieve the purpose of optimizing the data transmission rate. Therefore, the problem that the pilot structure remains unchanged and the performance is limited when multiple PRB joint channel estimation is effectively solved is effectively solved.
  • the embodiment of the invention further provides a method for sending a physical resource block, including:
  • the pilot structure only occupies 4 subcarriers, and the overhead is greatly reduced compared with the 6 subcarriers of the first demodulation pilot pattern, and the throughput performance is greatly improved.
  • the embodiment of the present invention further provides a method for performing channel estimation by a user equipment, which corresponds to the method for performing pilot configuration by the base station shown in FIG. 1. As shown in FIG. 6, the method includes:
  • Step 601 The user equipment receives M physical resource blocks (PRBs) sent by the base station for joint channel estimation.
  • PRBs physical resource blocks
  • the M PRBs include (X-1) M+1 demodulation pilot subcarriers, and (_N, N) subcarriers at the boundary of every two PRBs based on the boundary line of every two PRBs. Only one demodulation pilot subcarrier is configured in the range, and the positions of the remaining (X-2) M+2 demodulation pilot subcarriers and the solutions in the M consecutive first demodulation pilot patterns in the frequency domain The position of the pilot subcarriers is the same; where X is the number of demodulation pilot subcarriers included in the pilot pattern of the single PRB when the base station allocates a single PRB for the user equipment to perform channel estimation; a positive integer; N is a positive integer greater than 1 and less than or equal to 12/(X+1); the demodulation pilot subcarrier refers to a subcarrier used to carry a demodulation pilot; the first demodulation pilot pattern Refers to a demodulation pilot pattern used by a base station to allocate a single PRB for channel estimation by a user
  • Step 602 The user equipment acquires a received signal value of the demodulation pilot from the M PRBs, and estimates a channel coefficient of the demodulated pilot position according to the received signal value of the demodulated pilot.
  • the above received signal value refers to the signal value of the demodulated pilot position in the M PRBs received by the user equipment.
  • the method for estimating the channel coefficient of the pilot position according to the received signal value of the demodulation pilot may be specifically implemented by referring to the prior art, including: according to the signal value of the demodulation pilot position sent by the base station from the M PRBs and The user equipment estimates the channel coefficients of the demodulated pilot positions from the received signal values of the demodulated pilots obtained from the M PRBs.
  • the above estimation algorithm may be LS (lea s t square ).
  • Step 603 Obtain a channel coefficient of a data position in the M PRBs by using a channel coefficient of the demodulation pilot position and a relative positional relationship between the demodulation pilot and the data in the demodulation pilot pattern of the M PRBs.
  • it may include: according to some interpolation algorithm, such as linear or MMSE (min imum mean s qua re er ror , minimum mean square error), interpolating the channel coefficients of the above pilot positions to obtain channel coefficients of the data positions in the M PRBs.
  • some interpolation algorithm such as linear or MMSE (min imum mean s qua re er ror , minimum mean square error)
  • interpolating the channel coefficients of the above pilot positions to obtain channel coefficients of the data positions in the M PRBs.
  • the user equipment uses multiple PRBs for channel estimation, and is adapted to the flexible configuration of the base station to the pilot pattern.
  • This configuration optimizes the data transmission rate and effectively solves multiple PRB associations.
  • the pilot structure remains unchanged and the performance is limited.
  • FIG. 7 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • the base station can implement the method provided in the method embodiment shown in FIG. 1.
  • the base station includes a configuration unit 701 and a sending unit 702, where:
  • the configuration unit 701 is configured to: schedule, by the user equipment, the M physical resource blocks (PRBs), and configure the pilot patterns for the M PRBs according to the first manner, where the first manner includes:
  • X is the number of demodulation pilot subcarriers included in the pilot pattern of the single PRB when the base station allocates a single PRB for channel estimation by the base station; M is a positive integer greater than 1; N is greater than 1 And a positive integer less than or equal to 12/(X+1); the demodulation pilot subcarrier refers to a subcarrier used to carry a demodulation pilot; the first demodulation pilot pattern refers to the base station as a Demodulating a pilot pattern used by the user equipment to allocate a single PRB for channel estimation;
  • the sending unit 702 is configured to send, to the user equipment, the M PRBs configured by the configuration unit 701. So that the user equipment performs joint channel estimation according to the configured M PRBs.
  • FIG. 8 is a schematic structural diagram of a user equipment according to an embodiment of the present disclosure, where the user equipment can implement the method provided in the method embodiment shown in FIG.
  • the receiving unit 801 is configured to receive M physical resource blocks (PRBs) for joint channel estimation sent by the base station, where the M PRBs include (X-1) M+1 demodulation pilot subcarriers, and The boundary line of every two PRBs is the reference. There is only one demodulation pilot subcarrier in the range of (_N, N) subcarriers at every two PRB junctions, and the remaining (X-2) M+2 solutions The position of the pilot subcarrier is consistent with the position of the demodulation pilot subcarrier in the M consecutive first demodulation pilot patterns in the frequency domain;
  • PRBs physical resource blocks
  • X is the number of demodulation pilot subcarriers included in the pilot pattern of the single PRB when the base station allocates a single PRB for channel estimation by the base station; M is a positive integer greater than 1; N is greater than 1 and less than or a positive integer equal to 12/(X+1); the demodulation pilot subcarrier refers to a subcarrier used to carry a demodulation pilot; the first demodulation pilot pattern refers to a base station assigning a single PRB to a user equipment for channel estimation. Demodulation pilot pattern used at the time;
  • the number M of PRBs for joint channel estimation transmitted by the base station received by the receiving unit 801 may be equal to 2 or 3; and N is equal to 2 and X is equal to 3.
  • the channel estimation unit 802 is configured to obtain a received signal value of the demodulation pilot from the M PRBs received by the receiving unit 801, and estimate a channel coefficient of the demodulation pilot position according to the received signal value of the demodulation pilot; Channel coefficient of the pilot position and demodulation pilot pattern of the M PRBs The relative positional relationship between the demodulation pilot and the data acquires the channel coefficients of the data positions in the M PRBs.
  • the user equipment can use multiple PRBs for joint channel estimation, and is adapted to the flexible configuration of the pilot pattern by the base station, which optimizes the data transmission rate and effectively solves multiple PRB joint channel estimation.
  • the pilot structure remains unchanged and the performance is limited.
  • the functional units in the various embodiments of the present invention may be integrated into one processing module, or each unit may exist physically separately, or two or more units may be integrated into one module.
  • the above integrated modules can be implemented in the form of hardware or in the form of software functional modules.
  • the above integrated modules can also be stored in a computer readable storage medium if they are implemented in the form of software functional modules and sold or used as separate products.
  • the storage medium mentioned above may be a read only memory, a magnetic disk or an optical disk or the like.

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Description

发送物理资源块、 及信道估计的方法、 基站和用户设备 本申请要求于 2010 年 7 月 16 日提交中国专利局、 申请号为 201010231709.4、 发明名称为"发送物理资源块、 及信道估计的方法、 基站 和用户设备"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 本发明实施例涉及通信领域, 尤其涉及一种发送物理资源块、 及信道 估计的方法、 基站和用户设备。 背景技术 多天线技术可以充分利用信号的空间资源, 在不增加带宽的情况下用 来满足较高峰值速率的需求。 其主要过程可简单表示为, 在发送端的串行 数据流经过一些必要的空时处理后形成多个子信息流, 由多个天线发射, 再在接收端通过检测技术进行数据流的恢复。 然而多天线系统获得高速率 数据传输的一个重要前提是 CSI ( channel s ta te informa t ion , 信道状态 信息) 已知, 但在实际中, CSI常常是未知的, 准确的信道估计是保证多天 线系统传输质量的关键技术。
信道估计目前可以分为盲估计和基于训练序列的估计两种方法。 其中, 基于序列的信道估计方法一般来说是在发送端的数据包中插入一定数目的 导频, 接收端首先对已知的导频处的信道系数进行估计, 然后利用某种信 道估计算法插值得到数据处的信道系数, 进而进行数据均衡和译码。 导频 的数目, 位置, 釆用的序列等都将影响信道估计性能。
当信道频率选择性比较小, 信道相对平坦时, 可以联合多个 PRB ( Phys i ca l Resource Block, 物理资源块) , 即使用 PRB bundl ing (物理 资源块联合信道估计) , 进行信道估计以提高信道估计的精度。 现有技术中, 在多个 PRB联合进行信道估计时, 导频仍然保留现有技 术中使用单个 PRB进行信道估计时的原有位置和数目, 存在导频冗余及密 度不均匀的问题, 数据传输速率将受到影响。 发明内容 本发明实施例提供一种发送物理资源块、 及信道估计的方法、 基站和 用户设备, 实现了基于配置的联合 PRB数目进行自适应导频结构的调整, 优 化了系统性能。
本发明实施例提供了一种发送物理资源块的方法, 包括:
基站为用户设备调度 M个物理资源块(PRB ) , 并为所述 M个 PRB配置 导频图案, 所述配置导频图案的方法包括:
为所述 M个 PRB在频域上分配(X-1 ) M+1个解调导频子载波, 并以每 两个 PRB的交界线为基准, 在所述每两个 PRB交界处的 ( -N, N]个子载波的 范围内仅配置一个解调导频子载波, 且其余(X-2 ) M+2个解调导频子载波 的位置与频域上 M个连续的第一解调导频图案中解调导频子载波的位置保 持一致;
其中, X为基站为所述用户设备分配单个 PRB进行信道估计时, 所述单 个 PRB的导频图案中包括的解调导频子载波个数; M为大于 1的正整数; N 为大于 1且小于或等于 12/ (X+1)的正整数; 所述解调导频子载波指用于承 载解调导频的子载波; 所述第一解调导频图案指所述基站为所述用户设备 分配单个 PRB进行信道估计时使用的解调导频图案;
向所述用户设备发送配置后的 M个 PRB ,以使得所述用户设备根据所述 配置后的 M个 PRB进行联合信道估计。
本发明实施例提供了另一种发送物理资源块的方法, 包括:
基站为用户设备调度 2个物理资源块( PRB ) , 并为所述 2个 PRB配置 导频图案, 所述配置导频图案的方法包括: 为所述 1个 PRB在频域上分配 5个解调导频子载波,并以所述 1个 PRB 的交界线为基准, 在所述 2个 PRB交界处的 (-2 , 2 ]个子载波的范围内仅 配置一个解调导频子载波, 且其余 4 个解调导频子载波的位置与频域上 2 个连续的第一解调导频图案中解调导频子载波的位置保持一致;
其中, 所述解调导频子载波指用于承载解调导频的子载波; 所述第一 解调导频图案指所述基站为所述用户设备分配单个 PRB进行信道估计时, 使用的解调导频图案;
向所述用户设备发送配置后的 2个 PRB ,以使得所述用户设备根据所述 配置后的 1个 PRB进行联合信道估计。
本发明实施例提供了又一种发送物理资源块的方法, 包括:
基站为用户设备调度 3个物理资源块( PRB ) , 并为所述 3个 PRB配置 导频图案, 所述配置导频图案的方法包括:
为所述 3个 PRB在频域上分配 7个解调导频子载波,并以所述 3个 PRB 中每两个 PRB的交界线为基准, 在所述每两个 PRB交界处的 (-2, 2]个子 载波的范围内仅配置一个解调导频子载波, 且其余 5 个解调导频子载波的 位置与频域上 3个连续的第一解调导频图案中解调导频子载波的位置保持 一致;
其中, 所述解调导频子载波指用于承载解调导频的子载波; 所述第一 解调导频图案指所述基站为所述用户设备分配单个 PRB进行信道估计时, 使用的解调导频图案;
向所述用户设备发送配置后的 3个 PRB ,以使得所述用户设备根据所述 配置后的 3个 PRB进行联合信道估计。
本发明实施例还提供了一种信道估计方法, 包括:
用户设备接收基站发送的用于联合信道估计的 M个物理资源块( PRB ); 其中, 所述 M个 PRB包括( X-1 ) M+1个解调导频子载波, 且以每两个 PRB 的交界线为基准, 在每两个 PRB交界处的 (_N,N]个子载波的范围内仅包括 一个解调导频子载波, 且其余(X-2 ) M+2个解调导频子载波的位置与频域 上 M个连续的第一解调导频图案中解调导频子载波的位置保持一致;
其中, X为基站为所述用户设备分配单个 PRB进行信道估计时, 所述单 个 PRB的导频图案中包括的解调导频子载波个数; M为大于 1的正整数; N 为大于 1且小于或等于 12/ (X+1)的正整数; 所述解调导频子载波指用于承 载解调导频的子载波; 所述第一解调导频图案指所述基站为所述用户设备 分配单个 PRB进行信道估计时使用的解调导频图案;
所述用户设备从所述 M个 PRB的解调导频子载波中获取解调导频的接 收信号值, 根据所述解调导频的接收信号值估计解调导频位置的信道系数; 通过所述解调导频位置的信道系数以及所述解调导频与数据的相对位 置关系获取所述 M个 PRB中数据位置的信道系数。
本发明实施例提供了一种基站, 包括:
配置单元, 用于为用户设备调度 M个物理资源块(PRB ) , 并按照第一 方式为所述 M个 PRB配置导频图案, 所述第一方式包括:
为所述 M个 PRB在频域上分配(X-1 ) M+1个解调导频子载波, 并以每 两个 PRB的交界线为基准, 在所述每两个 PRB交界处的 (N,N]个子载波的 范围内仅配置一个解调导频子载波, 且其余(X-2 ) M+2个解调导频子载波 的位置与频域上 M个连续的第一解调导频图案中解调导频子载波的位置保 持一致;
其中, X为基站为所述用户设备分配单个 PRB进行信道估计时, 所述单 个 PRB的导频图案中包括的解调导频子载波个数; M为大于 1的正整数; N 为大于 1且小于或等于 12/ (X+1)的正整数; 所述解调导频子载波指用于承 载解调导频的子载波; 所述第一解调导频图案指所述基站为所述用户设备 分配单个 PRB进行信道估计时使用的解调导频图案;
发送单元, 用于向所述用户设备发送所述配置单元配置后的 M个 PRB , 以使得所述用户设备根据所述配置后的 M个 PRB进行联合信道估计。 本发明实施例提供了一种用户设备, 包括:
接收单元,接收基站发送的用于联合信道估计的 M个物理资源块( PRB ); 其中, 所述 M个 PRB包括( X-1 ) M+1个解调导频子载波, 且以每两个 PRB 的交界线为基准, 在每两个 PRB交界处的 (_N,N]个子载波的范围内仅包括 一个解调导频子载波, 且其余(X-2 ) M+2个解调导频子载波的位置与频域 上 M个连续的第一解调导频图案中解调导频子载波的位置保持一致;
其中, X为基站为所述用户设备分配单个 PRB进行信道估计时, 所述单 个 PRB的导频图案中包括的解调导频子载波个数; M为大于 1的正整数; N 为大于 1且小于或等于 12/ (X+1)的正整数; 所述解调导频子载波指用于承 载解调导频的子载波; 所述第一解调导频图案指所述基站为所述用户设备 分配单个 PRB进行信道估计时使用的解调导频图案;
信道估计单元, 用于从所述接收单元接收的 M个 PRB的解调导频子载 波中获取解调导频的接收信号值, 根据所述解调导频的接收信号值估计解 调导频位置的信道系数; 通过所述解调导频位置的信道系数以及所述解调 导频与数据的相对位置关系获取所述 M个 PRB中数据位置的信道系数。
本发明实施例中, 实现了在调度多个 PRB用于联合信道估计时, 适当 调整导频图案配置方式, 以达到不改变信道估计精度的基础上增加业务数 据传输效率的目的。 同时节省了导频的开销, 优化了数据传输速率。 并且 当釆用不同数目的 PRB联合进行信道估计时, 导频的开销和图案将进行自 适应变化以达到优化数据传输速率的目的。 从而有效解决了多个 PRB联合 信道估计时 , 导频结构保持不变而使性能受限的问题。
附图说明 图 1所示为本发明实施例提供了一种发送物理资源块的方法流程图; 图 2所示为现有技术中一种单个 PRB内导频图案示意图; 图 3所示为本发明实施例提供的一种 PRB bundl ing场景下的导频图案 示意图;
图 4所示为本发明实施例提供另一种的 PRB bundl ing场景下的导频图 案示意图;
图 5所示为本发明实施例提供又一种的 PRB bundl ing场景下的导频图 案示意图;
图 6 所示为本发明实施例提供的一种用户设备进行信道估计的方法流 程图;
图 7所示为本发明实施例提供的一种基站的结构示意图;
图 8所示为本发明实施例提供的一种用户设备的结构示意图。 具体实施方式 为使本发明实施例的目的、 技术方案和优点更加清楚, 下面将结合本 发明实施例中的附图, 对本发明实施例中的技术方案进行清楚、 完整地描 述, 显然, 所描述的实施例是本发明一部分实施例, 而不是全部的实施例。 基于本发明中的实施例, 本领域普通技术人员在没有做出创造性劳动前提 下所获得的所有其他实施例, 都属于本发明保护的范围。
如图 1所示, 本发明实施例提供了一种发送物理资源块的方法, 包括: 步骤 101、基站为用户设备调度 M个物理资源块(PRB ) , 并为 M个 PRB 配置导频图案, 该配置导频图案的方法包括:
为 M个 PRB在频域上分配( X-1 ) M+1个解调导频子载波, 并以每两个 PRB的交界线为基准, 在每两个 PRB交界处的 (_N,N]个子载波的范围内仅 配置一个解调导频子载波, 且其余(X-2 ) M+2个解调导频子载波的位置与 频域上 M个连续的第一解调导频图案中解调导频子载波的位置保持一致; 其中, X为基站为用户设备分配单个 PRB进行信道估计时, 该单个 PRB 的导频图案中包括的解调导频子载波个数; M为大于 1的正整数; N为大于 1 且小于或等于 12/(X+1)的正整数; 上述解调导频子载波指用于承载解调 导频的子载波; 上述第一解调导频图案指基站为用户设备分配单个 PRB进 行信道估计时使用的解调导频图案;
进一步的, 为了进一步提高信道估计性能, 在进行上述配置时, 还可 以使得上述在每两个 PRB 交界处的 (-N, N]个子载波的范围内仅存的一个 解调导频子载波与上下相邻两个解调导频子载波的距离相等。
步骤 102、 向用户设备发送配置后的 M个 PRB, 以使得用户设备根据配 置后的 M个 PRB进行联合信道估计。 下面以将现有技术中基站为所述用户设备分配单个 PRB进行信道估计 时使用的解调导频图案作为上述第一解调导频图案为例, 对本发明实施例 提供的方法进行说明:
如图 2所示, 为现有 LTE-A ( Long Term Evolution- Advanced, 长期 演进增强) 系统中使用单个 PRB进行信道估计时使用的解调导频图案, 包 括: 14*12个 RE (resource element,资源单元),斜线部分代表 CRS ( Common reference signal,公共导频),灰色阴影部分代表不同的 DMRS (Dedicated demodulation reference signal,专用解调导频,以下简称为 "解调导频"), 解调导频子载波指在频域上用于承载解调导频的子载波。
可以将上述实施例中 M取值为 2, N取值为 2, X取值为 3, 则按本发 明实施例提供的方法进行配置后的导频图案可以如图 3所示, 其中斜线部 分代表 CRS (Common reference signal,公共导频) , 灰色阴影部分代表不 同的醒 S ( Dedicated demodulation reference signal, 专用解调导频) , 可见在 PRB 交界处(-N, N]区间仅存在一个解调导频子载波, 当该解调导 频子载波与上下相邻两个解调导频子载波的距离相等时, 可以获得更好的 信道估计性能。
还可以将 M取值为 3, N取值为 1 X取值为 3, 则按本发明实施例提供 的方法进行配置后的导频图案如图 4所示, 其中斜线部分代表 CRS , 灰色阴 影部分代表不同的丽 RS。 在 PRB交界处 (-N, N]区间仅存在一个解调导频 子载波, 当该解调导频子载波与上下相邻两个解调导频子载波的距离相等 时, 可以获得更好的信道估计性能。
同理, 当 M取更大数值时的导频配置方式可根据上述方法推出, 在此 不再赘述。
据本实施例, 分配不同数目的 PRB进行联合信道估计, 节省的导频开 销比例可参考表 1。
表 1 节省的开销比例
Figure imgf000010_0001
通过本发明实施例提供的方法, 实现了在调度多个 PRB用于联合信道 估计时, 适当调整导频图案配置方式, 以达到不改变信道估计精度的基础 上增加业务数据传输效率的目的。 同时节省了导频的开销, 优化了数据传 输速率。 并且当釆用不同数目的 PRB联合进行信道估计时, 导频的开销和 图案将进行自适应变化以达到优化数据传输速率的目的。 从而有效解决了 多个 PRB联合信道估计时, 导频结构保持不变而使性能受限的问题。 本发明实施例还提供了一种发送物理资源块的方法, 包括:
导频结构在联合的 M个 PRB内均勾分布,可以设置导频频域起始位置为 S ,及频域间隔 L ,解调导频子载波的位置为 m, 则 = " * + ^ {0,1,„ *3} , 例如 S取 2 , L取 6 , 即可得到新的导频结构如果图 5所示。 对于 2个 PRB 的联合信道估计, 此种导频结构只占 4 个子载波, 相对第一解调导频图案 的 6个子载波, 开销大大缩减了, 吞吐量性能将有很大提升。 本发明实施例又提供了一种用户设备进行信道估计的方法, 与图 1 所 示的基站进行导频配置的方法相对应, 如图 6所示, 该方法包括:
步骤 601、用户设备接收基站发送的用于联合信道估计的 M个物理资源 块( PRB ) ;
其中, 上述 M个 PRB包括(X-1 ) M+1个解调导频子载波, 且以每两个 PRB的交界线为基准, 在每两个 PRB交界处的 (_N,N]个子载波的范围内仅 配置有一个解调导频子载波, 且其余(X-2 ) M+2个解调导频子载波的位置 与频域上 M个连续的第一解调导频图案中解调导频子载波的位置保持一致; 其中, X为基站为上述用户设备分配单个 PRB进行信道估计时, 上述单 个 PRB的导频图案中包括的解调导频子载波个数; M为大于 1的正整数; N 为大于 1且小于或等于 12/ (X+1)的正整数; 上述解调导频子载波指用于承 载解调导频的子载波; 上述第一解调导频图案指基站为用户设备分配单个 PRB进行信道估计时使用的解调导频图案;
步骤 602、用户设备从上述 M个 PRB中获取解调导频的接收信号值,根 据该解调导频的接收信号值估计解调导频位置的信道系数;
上述接收信号值是指用户设备接收到的 M个 PRB中解调导频位置的信 号值。 上述根据该解调导频的接收信号值估计导频位置的信道系数的方法 , 具体可以参照现有技术执行, 包括: 根据基站从上述 M个 PRB中发送的解 调导频位置的信号值及用户设备从上述 M个 PRB中获取的解调导频的接收 信号值, 来估计解调导频位置的信道系数。
例如, 上述估计算法可以为 LS ( lea s t square , 最小二乘) 。
步骤 603、通过上述解调导频位置的信道系数以及 M个 PRB的解调导频 图案中解调导频与数据的相对位置关系获取上述 M个 PRB中数据位置的信 道系数。
具体可以包括: 按照某种插值算法, 例如线性或 MMSE (min imum mean s qua re er ror , 最小均方误差), 对上述导频位置的信道系数插值, 从而获 取上述 M个 PRB中数据位置的信道系数。
通过本实施例提供的方法, 实现了用户设备釆用多个 PRB进行信道估 计, 且适应于基站对导频图案的灵活配置, 该配置使得数据传输速率得到 优化, 且有效解决了多个 PRB联合信道估计时, 导频结构保持不变而使性 能受限的问题。
本领域普通技术人员可以理解, 上述各实施例中的全部或部分步骤可 以通过程序指令相关的硬件来实现, 上述的程序可以存储于计算机可读取 存储介质中, 上述的存储介质, 可以是 R0M/RAM、 磁碟、 光盘等。 图 7 为本发明实施例提供的一种基站的结构示意图, 该基站能够实现 图 1所示方法实施例中提供的方法, 该基站包括配置单元 701和发送单元 702 , 其中:
配置单元 701 , 用于为用户设备调度 M个物理资源块(PRB ) , 并按照 第一方式为所述 M个 PRB配置导频图案, 所述第一方式包括:
为所述 M个 PRB在频域上分配(X-1 ) M+1个解调导频子载波, 并以每 两个 PRB的交界线为基准, 在所述每两个 PRB交界处的 (N,N]个子载波的 范围内仅配置一个解调导频子载波, 且其余(X-2 ) M+2个解调导频子载波 的位置与频域上 M个连续的第一解调导频图案中解调导频子载波的位置保 持一致;
其中, X为基站为所述用户设备分配单个 PRB进行信道估计时, 所述单 个 PRB的导频图案中包括的解调导频子载波个数; M为大于 1的正整数; N 为大于 1且小于或等于 12/ (X+1)的正整数; 所述解调导频子载波指用于承 载解调导频的子载波; 所述第一解调导频图案指所述基站为所述用户设备 分配单个 PRB进行信道估计时使用的解调导频图案;
发送单元 702 , 用于向用户设备发送配置单元 701配置后的 M个 PRB , 以使得所述用户设备根据所述配置后的 M个 PRB进行联合信道估计。
上述基站中个单元模块与用户设备的交互关系以及各单元功能的具体 实现方式, 可参照上述方法实施例中的描述。
本实施例, 基站可以在使用多个 PRB联合进行信道估计时, 适当减少 导频的开销, 调整导频图案, 以达到不改变信道估计精度的基础上增加业 务数据传输效率的目的, 并且当釆用不同数目的 PRB联合进行信道估计时, 导频的开销和图案将进行自适应变化以达到优化数据传输速率的目的。 图 8 为本发明实施例提供的一种用户设备的结构示意图, 该用户设备 能够实现图 6所示方法实施例中提供的方法, 该用户设备包括:
接收单元 801 ,用于接收基站发送的用于联合信道估计的 M个物理资源 块( PRB ); 其中, 上述 M个 PRB包括( X-1 ) M+1个解调导频子载波, 且以 每两个 PRB的交界线为基准, 在每两个 PRB交界处的(_N,N]个子载波的范 围内仅存在一个解调导频子载波, 且其余(X-2 ) M+2个解调导频子载波的 位置与频域上 M个连续的第一解调导频图案中解调导频子载波的位置保持 一致;
其中, X为基站为用户设备分配单个 PRB进行信道估计时, 该单个 PRB 的导频图案中包括的解调导频子载波个数; M为大于 1的正整数; N为大于 1 且小于或等于 12/ (X+1)的正整数; 上述解调导频子载波指用于承载解调 导频的子载波; 上述第一解调导频图案指基站为用户设备分配单个 PRB进 行信道估计时使用的解调导频图案;
例如, 接收单元 801接收的基站发送的用于联合信道估计的 PRB的个 数 M可以等于 2或 3 ; 且 N等于 2 , X等于 3。
信道估计单元 802 ,用于从接收单元 801接收的 M个 PRB中获取解调导 频的接收信号值, 根据上述解调导频的接收信号值估计解调导频位置的信 道系数; 通过解调导频位置的信道系数以及所述 M个 PRB的解调导频图案 中解调导频与数据的相对位置关系获取上述 M个 PRB中数据位置的信道系 数。
信道估计单元 802进行估计的具体方法, 可参照图 6所示实施例中步 骤 602、 603所述方法。
上述用户设备中个单元模块与基站的交互关系以及各单元功能的具体 实现方式, 可参照上述方法实施例中的描述。
本实施例中, 用户设备能够釆用多个 PRB进行联合信道估计, 且适应 于基站对导频图案的灵活配置, 该配置使得数据传输速率得到优化, 且有 效解决了多个 PRB联合信道估计时, 导频结构保持不变而使性能受限的问 题。
需要特别说明的是, 以上全部或部分单元可以集成在芯片中实现。 在 本发明各个实施例中的各功能单元可以集成在一个处理模块中, 也可以是 各个单元单独物理存在, 也可以两个或两个以上单元集成在一个模块中。 上述集成的模块既可以釆用硬件的形式实现, 也可以釆用软件功能模块的 形式实现。 上述集成的模块如果以软件功能模块的形式实现并作为独立的 产品销售或使用时, 也可以存储在一个计算机可读取存储介质中。 上述提 到的存储介质可以是只读存储器, 磁盘或光盘等。
附图和相关描述只是为了说明本发明的原理, 并非用于限定本发明 的保护范围。 例如, 本发明各实施例中的消息名称和实体可以根据网络 的不同而有所变化, 一些消息也可以省略。 因此, 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, 均包含在本发明的保护 范围内。
虽然通过参照本发明的某些优选实施例,已经对本发明进行了图示 和描述, 但本领域的普通技术人员应该明白, 可以在形式上和细节上对 其作各种改变, 而不偏离本发明的精神和范围。

Claims

权利要求
1、 一种发送物理资源块的方法, 其特征在于, 包括:
基站为用户设备调度 M个物理资源块(PRB ) , 并为所述 M个 PRB配置 导频图案, 所述配置导频图案的方法包括:
为所述 M个 PRB在频域上分配(X-1 ) M+1个解调导频子载波, 并以每 两个 PRB的交界线为基准, 在所述每两个 PRB交界处的 ( -N, N]个子载波的 范围内仅配置一个解调导频子载波, 且其余(X-2 ) M+2个解调导频子载波 的位置与频域上 M个连续的第一解调导频图案中解调导频子载波的位置保 持一致;
其中, X为基站为所述用户设备分配单个 PRB进行信道估计时, 所述单 个 PRB的导频图案中包括的解调导频子载波个数; M为大于 1的正整数; N 为大于 1且小于或等于 12/ (X+1)的正整数; 所述解调导频子载波指用于承 载解调导频的子载波; 所述第一解调导频图案指所述基站为所述用户设备 分配单个 PRB进行信道估计时使用的解调导频图案;
向所述用户设备发送配置后的 M个 PRB ,以使得所述用户设备根据所述 配置后的 M个 PRB进行联合信道估计。
2、 根据权利要求 1所述的方法, 其特征在于,
所述 M等于 2或 3 ; 所述 N等于 2 ; 所述 X等于 3。
3、 根据权利要求 1或 2所述的方法, 其特征在于, 所述每两个 PRB交 界处的(_N,N]个子载波的范围内仅配置的一个解调导频子载波与相邻两个 解调导频子载波的距离相等。
4、 一种信道估计方法, 其特征在于, 包括: 用户设备接收基站发送的用于联合信道估计的 M个物理资源块( PRB ); 其中, 所述 M个 PRB包括( X-1 ) M+1个解调导频子载波, 且以每两个 PRB 的交界线为基准, 在每两个 PRB交界处的 (_N,N]个子载波的范围内仅包括 一个解调导频子载波, 且其余(X-2 ) M+2个解调导频子载波的位置与频域 上 M个连续的第一解调导频图案中解调导频子载波的位置保持一致;
其中, X为基站为所述用户设备分配单个 PRB进行信道估计时, 所述单 个 PRB的导频图案中包括的解调导频子载波个数; M为大于 1的正整数; N 为大于 1且小于或等于 12/ (X+1)的正整数; 所述解调导频子载波指用于承 载解调导频的子载波; 所述第一解调导频图案指所述基站为所述用户设备 分配单个 PRB进行信道估计时使用的解调导频图案;
所述用户设备从所述 M个 PRB的解调导频子载波中获取解调导频的接 收信号值, 根据所述解调导频的接收信号值估计解调导频位置的信道系数; 通过所述解调导频位置的信道系数以及所述解调导频与数据的相对位 置关系获取所述 M个 PRB中数据位置的信道系数。
5、 根据权利要求 4所述的方法, 其特征在于,
所述 M等于 2或 3 ; 所述 N等于 2 ; 所述 X等于 3。
6、 根据权利要求 4或 5所述的方法, 其特征在于, 所述每两个 PRB交 界处的(_N,N]个子载波的范围内仅配置的一个解调导频子载波与相邻两个 解调导频子载波的距离相等。
7、 一种基站, 其特征在于, 包括:
配置单元, 用于为用户设备调度 M个物理资源块(PRB ) , 并按照第一 方式为所述 M个 PRB配置导频图案, 所述第一方式包括:
为所述 M个 PRB在频域上分配(X-1 ) M+1个解调导频子载波, 并以每 两个 PRB的交界线为基准, 在所述每两个 PRB交界处的 (N,N]个子载波的 范围内仅配置一个解调导频子载波, 且其余(X-2 ) M+2个解调导频子载波 的位置与频域上 M个连续的第一解调导频图案中解调导频子载波的位置保 持一致;
其中, X为基站为所述用户设备分配单个 PRB进行信道估计时, 所述单 个 PRB的导频图案中包括的解调导频子载波个数; M为大于 1的正整数; N 为大于 1且小于或等于 12/ (X+1)的正整数; 所述解调导频子载波指用于承 载解调导频的子载波; 所述第一解调导频图案指所述基站为所述用户设备 分配单个 PRB进行信道估计时使用的解调导频图案;
发送单元, 用于向所述用户设备发送所述配置单元配置后的 M个 PRB , 以使得所述用户设备根据所述配置后的 M个 PRB进行联合信道估计。
8、 根据权利要求 7所述的基站, 其特征在于, 所述第一方式中的 N为 2 , X为 3 ; 所述配置单元具体用于为用户设备调度 2个或 3个 PRB , 并按照 所述第一方式为所述 2个或 3个 PRB配置导频图案。
9、 一种用户设备, 其特征在于, 包括:
接收单元,接收基站发送的用于联合信道估计的 M个物理资源块( PRB ); 其中, 所述 M个 PRB包括( X-1 ) M+1个解调导频子载波, 且以每两个 PRB 的交界线为基准, 在每两个 PRB交界处的 (_N,N]个子载波的范围内仅包括 一个解调导频子载波, 且其余(X-2 ) M+2个解调导频子载波的位置与频域 上 M个连续的第一解调导频图案中解调导频子载波的位置保持一致;
其中, X为基站为所述用户设备分配单个 PRB进行信道估计时, 所述单 个 PRB的导频图案中包括的解调导频子载波个数; M为大于 1的正整数; N 为大于 1且小于或等于 12/ (X+1)的正整数; 所述解调导频子载波指用于承 载解调导频的子载波; 所述第一解调导频图案指所述基站为所述用户设备 分配单个 PRB进行信道估计时使用的解调导频图案;
信道估计单元, 用于从所述接收单元接收的 M个 PRB的解调导频子载 波中获取解调导频的接收信号值, 根据所述解调导频的接收信号值估计解 调导频位置的信道系数; 通过所述解调导频位置的信道系数以及所述解调 导频与数据的相对位置关系获取所述 M个 PRB中数据位置的信道系数。
10、 根据权利要求 9所述的用户设备, 其特征在于, 所述接收单元接收 的基站发送的用于联合信道估计的 PRB的个数 M等于 2或 3; 所述 N等于 2; 所 述 X等于 3。
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