WO2010124445A1 - 码本、码本生成方法、基于码本的上行发射方法及设备 - Google Patents

码本、码本生成方法、基于码本的上行发射方法及设备 Download PDF

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Publication number
WO2010124445A1
WO2010124445A1 PCT/CN2009/071502 CN2009071502W WO2010124445A1 WO 2010124445 A1 WO2010124445 A1 WO 2010124445A1 CN 2009071502 W CN2009071502 W CN 2009071502W WO 2010124445 A1 WO2010124445 A1 WO 2010124445A1
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WIPO (PCT)
Prior art keywords
codebook
rank
elements
network device
data transmission
Prior art date
Application number
PCT/CN2009/071502
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English (en)
French (fr)
Inventor
周永行
Original Assignee
华为技术有限公司
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Filing date
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 PCT/CN2009/071502 priority Critical patent/WO2010124445A1/zh
Priority to JP2012507569A priority patent/JP5472884B2/ja
Priority to CN200980147389.XA priority patent/CN102239648B/zh
Publication of WO2010124445A1 publication Critical patent/WO2010124445A1/zh
Priority to US13/271,939 priority patent/US8351540B2/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613Diversity 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
    • H04B7/0615Diversity 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
    • H04B7/0619Diversity 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
    • H04B7/0636Feedback format
    • H04B7/0639Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0002Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H04L1/0003Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0025Transmission of mode-switching indication
    • 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
    • H04L25/03Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03891Spatial equalizers
    • H04L25/03898Spatial equalizers codebook-based design
    • H04L25/0391Spatial equalizers codebook-based design construction details of matrices
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613Diversity 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
    • H04B7/0615Diversity 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
    • H04B7/0619Diversity 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
    • H04B7/0621Feedback content
    • H04B7/063Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/06TPC algorithms
    • H04W52/14Separate analysis of uplink or downlink
    • H04W52/146Uplink power control
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/18TPC being performed according to specific parameters
    • H04W52/26TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service]
    • H04W52/262TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service] taking into account adaptive modulation and coding [AMC] scheme
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00Reducing energy consumption in communication networks
    • Y02D30/50Reducing energy consumption in communication networks in wire-line communication networks, e.g. low power modes or reduced link rate

Definitions

  • Codebook Codebook, codebook generation method, codebook-based uplink transmission method and device
  • the present invention relates to the field of communications, and in particular, to a codebook, a codebook generation method, a codebook-based uplink transmission method, and a device.
  • the codebook-based uplink and downlink precoding method is a very critical technology.
  • the design of the uplink and downlink codebook can greatly improve the performance of the uplink and downlink.
  • Embodiments of the present invention provide a codebook, a codebook generation method, a codebook-based uplink transmission method, and a device, which are capable of reducing power loss of a power amplifier.
  • a codebook comprising one or any combination of the following:
  • a codebook creation method including:
  • One or any combination of the primes, the codebook size N and the symbol set ⁇ are determined, wherein the ⁇ , ⁇ ,
  • 1,
  • a codebook based uplink transmission method includes:
  • the elements of include one or any combination of the following:
  • the uplink transmit amplifier power backoff amount is determined according to the modulation mode, the rank of the data transmission and the precoded codeword, and the locally stored codebook, and is transmitted.
  • a codebook based uplink transmission method includes:
  • the precoding codeword is a matrix arbitrarily selected from a locally stored codebook, wherein an element of the codebook includes one of the following or random combination:
  • the modulation scheme, the rank of the data transmission, and the precoding codeword are transmitted to the user equipment.
  • a user equipment including:
  • a receiving unit configured to receive a modulation mode, a rank of data transmission, and a precoding codeword sent by the network device, where the precoding codeword is a matrix arbitrarily selected from a codebook stored by the network device,
  • the elements of the codebook include: any one of
  • a determining unit configured to determine an uplink transmit amplifier power backoff amount according to a modulation mode, a rank of the data transmission, and a precoding codeword, and the codebook stored by the storage unit;
  • a transmitting unit configured to transmit according to the uplink transmit amplifier power backoff amount.
  • a network device including;
  • a selecting unit configured to select a modulation mode, a rank of the data transmission, and a precoding codeword, wherein the precoding codeword is a codebook c stored from the storage unit.
  • a sending unit configured to send the modulation mode, the rank of the data transmission, and the precoding codeword to the user equipment.
  • a codebook creation device comprising: Oh,
  • the codebook, the codebook generating method, the codebook-based uplink transmitting method and the device provided by the embodiment of the present invention propose a new codebook, which can reduce the uplink power amplifier by using the codebook for precoding. Power loss.
  • FIG. 1 is a flowchart of a codebook-based uplink transmission method according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a codebook-based uplink transmission method according to another embodiment of the present invention
  • FIG. 4 is a schematic structural diagram of a user equipment according to an embodiment of the present invention
  • FIG. 5 is a schematic structural diagram of a network device according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic structural diagram of a codebook creation apparatus according to an embodiment of the present invention. detailed description
  • the codebook-based uplink transmission method provided by the embodiment of the present invention, as shown in FIG. 1, the method includes:
  • S1 0 receives a modulation mode, a rank of data transmission, and a precoding codeword transmitted from the network device, where the precoding codeword is a matrix arbitrarily selected from a codebook stored by the network device, wherein the codebook c. .
  • the elements of include one or any combination of the following:
  • S1 02 Determine, according to a modulation mode, a rank of the data transmission, a precoding codeword, and a locally stored codebook, an uplink transmit amplifier power backoff amount, and transmit.
  • the locally saved codebook may be locally calculated, or may be sent by a network device, or may be directly set into the user equipment.
  • a new codebook is used, and the design of the codebook is utilized, which can reduce the power backoff of the uplink transmit amplifier and reduce the amount of power of the uplink transmit amplifier. Power loss of the power amplifier.
  • a codebook-based uplink transmission method includes the following steps:
  • the S20K selects a modulation mode, a rank of the data transmission, and a precoding codeword, where the precoding codeword is a matrix arbitrarily selected from the locally stored codebook, where the elements of the codebook include one of the following or random combination:
  • S202 Send the modulation mode, the rank of the data transmission, and the precoding codeword to the user equipment.
  • the locally saved codebook can be calculated locally or directly into the network device.
  • a new codebook C ⁇ is used, and the design of the codebook is utilized, which can reduce the power backoff of the uplink transmit amplifier and reduce the amount of power of the uplink transmit amplifier. Power loss of the power amplifier.
  • a codebook-based uplink transmission method includes the following steps:
  • S30 The user equipment sends a measurement reference signal to the network device.
  • the network device receives the measurement reference signal sent by the user equipment, performs channel measurement according to the measurement reference signal, and obtains a channel measurement result.
  • the network device selects a modulation mode, a rank of the data transmission, and a pre-coded codeword according to the channel measurement result, where the pre-encoded codeword is a matrix arbitrarily selected from the codebook stored by the network device;
  • the network device sends the modulation mode, the rank of the data transmission, and the precoding codeword to the user equipment.
  • the user equipment receives the modulation mode from the network device, the rank of the data transmission, and the precoding codeword, and the locally saved codebook determines the uplink transmit amplifier power backoff amount and transmits.
  • a new codebook C ⁇ is used, and the design of the codebook is utilized, which can reduce the power backoff of the uplink transmit amplifier and reduce the amount of power of the uplink transmit amplifier. Power loss of the power amplifier.
  • Embodiment 1 The uplink precoding method provided by the first embodiment of the present invention is described by taking a QPSK (Quadature Phase Shift Keying) modulation mode as an example, but the embodiment of the present invention is not limited to the QPSK modulation mode. Other modulation methods, such as 8PSK, may also be employed in the embodiments of the invention. Including: Any one of QPSK (Quadature Phase Shift Keying) modulation mode as an example, but the embodiment of the present invention is not limited to the QPSK modulation mode. Other modulation methods, such as 8PSK, may also be employed in the embodiments of the invention. Including: Any one of
  • the codebook includes the following matrix:
  • the codebook can be obtained by offline calculation using a computer according to the above method, or the codebook C can be correspondingly calculated according to the above method in a network device or user equipment with strong capabilities.
  • the power gain of the codebook provided by the embodiment of the present invention is 0.6.
  • this embodiment further defines any one of the matrixes in the codebook as the Rank 1 codebook, it is optimized to obtain
  • the network device may be, for example, a base station.
  • the user equipment provided by the embodiment of the present invention includes: a receiving unit 401, a storage unit 402, a determining unit 403, and a transmitting unit 404.
  • the receiving unit 401 receives a modulation mode, a rank of data transmission, and a precoding codeword sent by the network device, where the precoding codeword is a matrix arbitrarily selected from a codebook stored by the network device, where the codebook C ⁇
  • the elements include one or any combination of the following:
  • the storage unit 402 is configured to store the codebook C. RT ; a determining unit 403, configured to determine, according to a modulation mode, a rank of the data transmission, a precoding codeword, and the codebook stored by the storage unit 402, an uplink transmit amplifier power backoff amount;
  • the transmitting unit 404 is configured to transmit according to the uplink transmit amplifier power backoff amount.
  • the user equipment provided by the embodiment of the present invention can determine a new uplink transmit amplifier power backoff amount according to the newly proposed codebook C ⁇ , and the uplink transmit amplifier power backoff amount is smaller than the backoff amount of the existing codebook. Power loss can be reduced.
  • the user equipment may further include:
  • a calculating unit 405 configured to calculate a codebook ⁇ , and store the codebook in the storage unit
  • the receiving unit 401 is further configured to receive the codebook C ⁇ and store the codebook in the storage unit 402.
  • the network device provided by the embodiment of the present invention includes: a selecting unit 501, a storage unit 502, and a sending unit 503.
  • the selecting unit 501 is configured to select a modulation mode, a rank of the data transmission, and a precoding codeword, where the precoding codeword is a matrix arbitrarily selected from the codebook stored by the storage unit 502, the codebook C. .
  • the elements of include one or any combination of the following:
  • the storage unit 502 is configured to store the codebook C ⁇ ;
  • the sending unit 503 is configured to send the modulation mode, the rank of the data transmission, and the precoding codeword to the user equipment.
  • the network device provided by the embodiment of the present invention stores a new codebook C ⁇ .
  • the user equipment can determine a new uplink transmit amplifier power backoff amount, and the uplink transmit amplifier power backoff amount is larger than the existing code. The amount of back-off is small, so power loss can be reduced.
  • the foregoing network device may further include:
  • a calculating unit 504 configured to calculate a codebook C..., and store the codebook C... in the storage unit
  • the receiving unit 505 is configured to receive the codebook C. Pt , and codebook C.
  • the pt is stored in the storage unit 502.
  • the codebook creation device provided by the embodiment of the present invention, as shown in FIG. 6, includes: an acquisition module 601,
  • the codebook creation device provided by the embodiment of the present invention can generate a new codebook.
  • the user equipment can determine a new uplink transmit amplifier power backoff amount, and the uplink transmit amplifier power backoff ratio is The amount of back-off of the codebook is small, so power loss can be reduced.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
  • Transmitters (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Description

码本、 码本生成方法、 基于码本的上行发射方法及设备 技术领域
本发明涉及通信领域, 尤其涉及一种码本、 码本生成方法、 基于码本的 上行发射方法及设备。
背景技术
基于码本的上下行预编码方法是非常关键的技术。 上下行码本的设计能 够极大改善上下行链路的性能。
在新一代无线蜂窝移动通信系统中, 有比较成熟可行的基于码本的下行 预编码方法, 但对于能够提高上行的吞吐量的基于码本的上行预编码方法还 没有提出解决方案。 为填补此项空白, 目前的做法是将下行码本直接用作上 行码本, 进行上行预编码。
但是, 将下行码本直接用作上行码本, 会加大功率放大器的功率损失。 发明内容
本发明的实施例提供一种码本、 码本生成方法、 基于码本的上行发射方 法及设备, 能够减少功率放大器的功率损失。
为达到上述目的, 本发明的实施例采用如下技术方案:
一种码本, 所述码本的元素包括以下之一或其任意组合:
Figure imgf000003_0001
d = l, = 1, , = 1 一种码本创建方法, 包括:
Figure imgf000003_0002
素之一或任意组合, 确定码本大小 N和符号集合 Ψ , 其中, 所述 α,Α^Ψ, |«| = 1,| | = 1,^ = 1, Ψ含有的元素个数为 Μ个; 遍历 *m3种码本, 对每一个码本 <^ , 计算最小距离 A , 所述 Dx= , 其中, 所述 4, ( )( ) '-(C ) (Q) , C代表码本
Figure imgf000004_0001
中第 个矩阵; 选出所述最小距离1 ^最大的码本 ^^。 一种基于码本的上行发射方法, 包括:
接收来自网络设备发送的调制方式、 数据传输的秩和预编码码字, 其中, 所述预编码码字是从所述网络设备存储的码本 中任意选出的一个矩阵, 其 中所述码本 C。。,的元素包括以下之一或其任意组合:
Figure imgf000004_0002
根据所述调制方式、 数据传输的秩和预编码码字, 以及本地保存的码本 确定上行发射放大器功率回退量, 并进行发射。
一种基于码本的上行发射方法, 包括:
选择调制方式、 数据传输的秩和预编码码字, 其中, 所述预编码码字是 从本地存储的码本 中任意选出的一个矩阵, 其中所述码本 的元素包括 以下之一或其任意组合:
Figure imgf000004_0003
将所述调制方式、 数据传输的秩和预编码码字向用户设备发送。
一种用户设备, 包括:
接收单元, 用于接收来自网络设备发送的调制方式、 数据传输的秩和预 编码码字, 其中, 所述预编码码字是从所述网络设备存储的码本 中任意选 出的一个矩阵,所述码本 的元素包括: 中的任意一
Figure imgf000005_0001
个或任意多个, 其中, |«| = 1,| | = 1, | = 1; 存储单元, 用于存储码本 ^ ;
确定单元, 用于根据调制方式、 数据传输的秩和预编码码字, 以及所述 存储单元存储的所述码本 , 确定上行发射放大器功率回退量;
发射单元, 用于根据所述上行发射放大器功率回退量进行发射。
一种网络设备, 包括;
选择单元, 用于选择调制方式、 数据传输的秩和预编码码字, 其中, 所 述预编码码字是从所述存储单元存储的码本 c。rt中任意选出的一个矩阵, 所述 码本 c。。,的元素包括: 中的任意一
Figure imgf000005_0002
个或任意多个, 其中 a 存储单元, 用于存储码本 c^ ;
发送单元, 用于将所述调制方式、 数据传输的秩和预编码码字向用户设 备发送。
一种码本创建装置, 包括: Ψ ,
Figure imgf000006_0001
其中, 所述 α,Α ;^ Ψ , |«| = 1,| | = 1, | = 1 , Ψ含有的元素个数为 Μ个; 计算模块, 用于遍历 种码本, 对每一个码本 计算最小距离 A , 所述 ct
¾ = mm diag ( ,7· ' x ), 其中, 所述 4, . = ( )( Ci ) C 代表码 本 中第 个矩阵; 选择模块, 用于选出所述最小距离 最大的码本 C
本发明实施例提供的码本、 码本生成方法、 基于码本的上行发射方法及 设备, 提出了一种新的码本 ς^ , 通过利用该码本进行预编码, 能够减少上行 功率放大器的功率损失。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案, 下面将对实 施例或现有技术描述中所需要使用的附图作简单地介绍, 显而易见地, 下面 描述中的附图仅仅是本发明的一些实施例, 对于本领域普通技术人员来讲, 在不付出创造性劳动的前提下, 还可以根据这些附图获得其他的附图。
图 1为本发明实施例提供的基于码本的上行发射方法的流程图; 图 2为本发明另一实施例提供的基于码本的上行发射方法的流程图; 图 3为本发明又一实施例提供的基于码本的上行发射方法的示意图; 图 4为为本发明实施例提供的用户设备的结构示意图;
图 5为为本发明实施例提供的网络设备的结构示意图;
图 6为为本发明实施例提供的码本创建装置的结构示意图。 具体实施方式
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, 所描述的实施例仅仅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作 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。
本发明实施例提供的基于码本的上行发射方法, 如图 1 所示, 该方法的 步骤包括:
S1 0 接收来自网络设备发送的调制方式、 数据传输的秩和预编码码字, 其中, 预编码码字是从网络设备存储的码本 中任意选出的一个矩阵, 其中 所述码本 c。。,的元素包括以下之一或其任意组合:
Figure imgf000007_0001
S1 02、 根据调制方式、 数据传输的秩和预编码码字, 以及本地保存的码 本 确定上行发射放大器功率回退量, 并进行发射。
这里, 本地保存的码本 可以是本地计算得出的, 也可以是由网络设备 发送的, 还可以是直接设置进用户设备的。
本发明实施例提供的基于码本的上行发射方法, 提出了一种利用新的码 本 c^ , 通利用该码本的设计, 能够比现有技术减少上行发射放大器功率回退 量, 进而减少功率放大器的功率损失。
本发明另一实施例提供的基于码本的上行发射方法, 如图 2 所示, 该方 法的步骤包括:
S20K 选择调制方式、 数据传输的秩和预编码码字, 其中, 预编码码字 是从本地存储的码本 中任意选出的一个矩阵, 其中, 所述码本 的元素 包括以下之一或其任意组合:
Figure imgf000008_0001
S202、 将所述调制方式、 数据传输的秩和预编码码字向用户设备发送。 这里, 本地保存的码本 可以是本地计算得出的, 也可以是直接设置进 网络设备的。
本发明实施例提供的基于码本的上行发射方法, 提出了一种利用新的码 本 C^ , 通利用该码本的设计, 能够比现有技术减少上行发射放大器功率回退 量, 进而减少功率放大器的功率损失。
本发明又一实施例提供的基于码本的上行发射方法, 如图 3 所示, 该方 法的步骤包括:
S30 用户设备向网络设备发送测量参考信号;
5302、 网络设备接收来自用户设备发送的测量参考信号, 根据测量参考 信号进行信道测量, 得到信道测量结果;
5303、 网络设备根据信道测量结果选择调制方式、 数据传输的秩和预编 码码字, 其中, 预编码码字是从网络设备存储的码本 中任意选出的一个矩 阵;
5304、 网络设备将调制方式、 数据传输的秩和预编码码字向用户设备发 送;
5305、 用户设备接收来自网络设备的调制方式、 数据传输的秩和预编码 码字,以及本地保存的码本 确定上行发射放大器功率回退量,并进行发射。
本发明实施例提供的基于码本的上行发射方法, 提出了一种利用新的码 本 C^ , 通利用该码本的设计, 能够比现有技术减少上行发射放大器功率回退 量, 进而减少功率放大器的功率损失。
实施例一: 本发明实施例一提供的上行预编码方法, 以 QPSK ( Quadrature Phase Shift Keying, 正交相移键控)调制方式为例进行说明, 但并不将本发明实 施例限制为采用 QPSK调制方式, 本发明实施例中还可以采用其他调制方式, 例如为 8PSK。 包括: 中的任意一
Figure imgf000009_0001
个或任意多个, 其中 |«| = 1,| | = 1, | = 1, ,β,χ Ψ 例如, 可以设 QPSK的符号集合 Ψ = {±1,±·} , 设码本大小 Ν=16, 以 Rank3 为例进行说明。
对于本实施例, 遍历 种可能的码本, 这里 M 为 Ψ含有的元素个数, 在上述设定的条件下, M 为 2 , 对每一个码本 , 根据公式
Figure imgf000009_0002
, G代 表码本 cx中第 个矩阵( 从第一个矩阵开始, 顺序往后数, i=l, 2, 3, 4, ......
16 ); 然后选出最小距离1 ^最大的码本 结果如下所示, 该码本 包括以 下矩阵:
Figure imgf000009_0003
Figure imgf000010_0001
本实施例例如可以利用计算机按照上述方法进行离线计算得到码本 , 也可以在能力较强的网络设备或用户设备中按照上述方法进行相应计算得到 码本 C 。
利用本实施例给出的上述码本 , 对于上行方式, 假定 IFFT ( Inver se Fas t Four ier Transform, 快速傅立叶逆变换)点数为 512、 有效数据点数为
300, 根据公式 CM dB , 经过计算, 在 QPSK调
Figure imgf000010_0002
试方式下利用本发明实施例提供的码本 得到 CM=3. 由于 CM是标识 回退量大小的量, 也就是说上行发射放大其功率回退量为 U dB, 若利用现有 技术则 CM=3. 8 , 在此, 针对 QPSK调制方式, 发现利用本发明实施例提供的 码本 比现有技术有 0. 6 的功率增益。 此外, 针对某些用户使用的 Rankl 码本, 本实施例如果进一步限定上述 码本 中的任意一个矩阵的任意一列为 Rank 1码本 , 则经过优化得到以
Figure imgf000010_0003
Figure imgf000011_0001
1/V2 1 0 "1/V2 1 0 1 0 1/V2 1 0
V2 0 1 2 0
V2 j 因此, 也能
Figure imgf000011_0002
够适用某些用户所使用的 Rankl码本。 若码本 的计算是离线进行的话, 计算得到码本 后, 需要将其设置 到用户设备和网络设备中, 在本实施例中, 网络设备例如可以为基站。
本发明实施例提供的用户设备, 如图 4所示, 包括: 接收单元 401, 存储 单元 402, 确定单元 403, 发射单元 404。
接收单元 401接收网络设备发送的调制方式、 数据传输的秩和预编码码 字,其中,该预编码码字是从网络设备存储的码本 中任意选出的一个矩阵, 所述码本 C ^的元素包括以下之一或其任意组合:
Figure imgf000011_0003
存储单元 402, 用于存储码本 C。RT; 确定单元 403 , 用于根据调制方式、 数据传输的秩和预编码码字, 以及存 储单元 402存储的所述码本 , 确定上行发射放大器功率回退量;
发射单元 404 , 用于根据所述上行发射放大器功率回退量进行发射。 本发明实施例提供的用户设备, 能够根据新提出的码本 C^ , 确定新的上 行发射放大器功率回退量, 该上行发射放大器功率回退量比现有码本的回退 量小, 因而可以减少功率损失。
进一步地, 该用户设备还可以包括:
计算单元 405 , 用于计算得到码本 ς^ , 并将码本 存入所述存储单元
402。
此外, 接收单元 401 还用于接收码本 C^ , 并将所述码本 存入所述存 储单元 402。
本发明实施例提供的网络设备, 如图 5所示, 包括; 选择单元 501 , 存储 单元 502 , 发送单元 503。
选择单元 501 , 用于选择调制方式、 数据传输的秩和预编码码字, 其中, 预编码码字是从存储单元 502存储的码本 中任意选出的一个矩阵, 所述码 本 C。。,的元素包括以下之一或其任意组合:
Figure imgf000012_0001
存储单元 502 , 用于存储码本 C^ ;
发送单元 503 , 用于将调制方式、数据传输的秩和预编码码字向用户设备 发送。
本发明实施例提供的网络设备, 保存有新的码本 C^ , 通过利用该码本, 用户设备可以确定新的上行发射放大器功率回退量, 该上行发射放大器功率 回退量比现有码本的回退量小, 因而可以减少功率损失。 进一步地, 上述网络设备还可以包括:
计算单元 504 , 用于计算得到码本 C„„, , 并将码本 C„„,存入所述存储单元
502 :
接收单元 505 , 用于接收码本 C。pt , 并将码本 C。pt存入所述存储单元 502。 本发明实施例提供的码本创建装置, 如图 6所示, 包括: 获取模块 601 ,
,
Figure imgf000013_0001
其中, 所述 α,Α;^ Ψ , |«| = 1,| | = 1,W = 1 , Ψ含有的元素个数为 M个; 计算模块 602 ,用于遍历 ^种码本,对每一个码本 Gx ,计算最小距离 , 所述 Α = ι^∑ (4,/χ4 , 其中, 所述 4, G代表码 本 中第 个矩阵; 选择模块 603 , 用于选出所述最小距离 最大的码本 。
本发明实施例提供的码本创建装置, 能够生成一种新的码本, 通过利用 该码本, 用户设备可以确定新的上行发射放大器功率回退量, 该上行发射放 大器功率回退量比现有码本的回退量小, 因而可以减少功率损失。
以上所述, 仅为本发明的具体实施方式, 但本发明的保护范围并不局限 于此, 任何熟悉本技术领域的技术人员在本发明揭露的技术范围内, 可轻易 想到变化或替换, 都应涵盖在本发明的保护范围之内。 因此, 本发明的保护 范围应所述以权利要求的保护范围为准。

Claims

权利 要求 书
1、 一种码本, 其特征在于, 所述码本的元素包括以下之一或其任意组合:
Figure imgf000014_0001
2、 一种码本创建方法, 其特征在于, 包括 根据 三种元素
Figure imgf000014_0002
之一或任意组合, 确定码本大小 Ν 和符号集合 Ψ , 其中, 所述 α,Α; ΕΨ , |«| = 1,| | = 1, | = 1, Ψ含有的元素个数为 Μ个; 遍历 种码本, 对每一个码本 , 计算最 d距离 ^ , 所述
A G代表码本 中
Figure imgf000014_0003
第 个矩阵; 选出所述最小距离1 ^最大的码本
3、 一种基于码本的上行发射方法, 其特征在于, 包括:
接收来自网络设备发送的调制方式、 数据传输的秩和预编码码字, 其中, 所述预编码码字是从所述网络设备存储的码本 中任意选出的一个矩阵, 其中 所述码本 c。pt的元素包括以下之- -或其任意组合:
Figure imgf000014_0004
=1, 根据所述调制方式、 数据传输的秩和预编码码字, 以及本地保存的码本 确定上行发射放大器功率回退量, 并进行发射。
4、 根据权利要求 2所述的基于码本的上行发射方法, 其特征在于, 所述码 本 的创建过程包括:
确定码本大小 N和符号集合 Ψ , 其中, 所述 α,Α;^ Ψ, Ψ含有的元素个数为
Μ个;
遍历 种码本, 对每一个码本 , 计算最小距离 A , 所述 Dx = , 其中, 所述 4 (C )(C )'-(G )( ¾ ) , C代表码本 中
Figure imgf000015_0001
第 个矩阵; 选出所述最小距离1 ^最大的码本 ^^。
5、 根据权利要求 4所述的基于码本的上行发射方法, 其特征在于, 所述码 本 Cnt决定的上行发射放大器功率回退量通过公式
= 201og10{屬 [ ]}— 1.52 + 0 77
CM ^计算得出
1.56
6、 一种基于码本的上行发射方法, 其特征在于, 包括:
选择调制方式、 数据传输的秩和预编码码字, 其中, 所述预编码码字是从 本地存储的码本 C„„,中任意选出的一个矩阵, 其中所述码本 C ^的元素包括以下 之一或其任意组合:
Figure imgf000015_0002
« = 1, 将所述调制方式、 数据传输的秩和预编码码字向用户设备发送。
7、 根据权利要求 6所述的基于码本的上行发射方法, 其特征在于, 所述码 本 的创建过程包括:
确定码本大小 N和符号集合 Ψ , 其中, 所述 α,Α;^ Ψ, Ψ含有的元素个数为 M个;
遍历 种码本, 对每一个码本 , 计算最小距离 A , 所述
Dx = mm^diag{Ai Ai j) , 其中, 所述 4 ( )( )'-( )( ), C代表码本 中 第 个矩阵; 选出所述最小距离1 ^最大的码本 ^^。
8、 一种用户设备, 其特征在于, 包括:
接收单元, 用于接收来自网络设备发送的调制方式、 数据传输的秩和预编 码码字, 其中, 所述预编码码字是从所述网络设备存储的码本 C中任意选出的 一个矩阵,所述码本 的元素包括: 中的任意一个
Figure imgf000016_0001
或任意多个, 其中, 存储单元, 用于存储码本 C。;
确定单元, 用于根据调制方式、 数据传输的秩和预编码码字, 以及所述存 储单元存储的所述码本 , 确定上行发射放大器功率回退量;
发射单元, 用于根据所述上行发射放大器功率回退量进行发射。
9、 根据权利要求 8所述的用户设备, 其特征在于, 所述用户设备还包括: 计算单元, 用于计算得到所述码本 ς^ , 并将所述码本 存入所述存储单 元。
10、 根据权利要求 8 所述的用户设备, 其特征在于, 所述接收单元, 还用 于接收所述码本 C。pt , 并将所述码本 C。pt存入所述存储单元。
11、 一种网络设备, 其特征在于, 包括;
选择单元, 用于选择调制方式、 数据传输的秩和预编码码字, 其中, 所述 预编码码字是从所述存储单元存储的码本 c。rt中任意选出的一个矩阵, 所述码本 c。。,的元素包括: 中的任意一个
Figure imgf000017_0001
或任意多个, 其中, |«| 存储单元, 用于存储码本 C^;
发送单元, 用于将所述调制方式、 数据传输的秩和预编码码字向用户设备 发送。
12、根据权利要求 11所述的网络设备, 其特征在于, 所述网络设备还包括: 计算单元, 用于计算得到所述码本 C。p,, 并将所述码本 C。p,存入所述存储单 L;
接收单元, 用于接收所述码本 ς^, 并将所述码本 存入所述存储单元。
13、 一种码本创建装置, 其特征在于, 包括: 获取
三种元素之一或任意组合, 获取码本大小 N和符号集合 Ψ ,
Figure imgf000017_0002
其中, 所述 α, ,^ψ,
Figure imgf000017_0003
ι, Ψ含有的元素个数为 Μ个; 计算模块, 用于遍历 种码本, 对每一个码本 计算最小距离 A , 所
^Dx =mm^diag(Ai Aij) , 其中, 所述4, ( )( )'-((^)(<^), C代表码本 中第 个矩阵; 选择模块, 用于选出所述最小距离 最大的码本 ^。
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