WO2012024856A1 - Procédé et dispositif adaptés pour configurer de la puissance dans une région à entrées multiples et à sorties multiples (mimo, multiple-input multiple-output) en boucle ouverte - Google Patents

Procédé et dispositif adaptés pour configurer de la puissance dans une région à entrées multiples et à sorties multiples (mimo, multiple-input multiple-output) en boucle ouverte Download PDF

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Publication number
WO2012024856A1
WO2012024856A1 PCT/CN2010/078091 CN2010078091W WO2012024856A1 WO 2012024856 A1 WO2012024856 A1 WO 2012024856A1 CN 2010078091 W CN2010078091 W CN 2010078091W WO 2012024856 A1 WO2012024856 A1 WO 2012024856A1
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Prior art keywords
power
mimo
loop region
frequency
open loop
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PCT/CN2010/078091
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English (en)
Chinese (zh)
Inventor
关艳峰
宁丁
陈宪明
方惠英
鲁照华
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中兴通讯股份有限公司
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Publication of WO2012024856A1 publication Critical patent/WO2012024856A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/38—TPC being performed in particular situations
    • H04W52/42—TPC being performed in particular situations in systems with time, space, frequency or polarisation diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0037—Inter-user or inter-terminal allocation
    • H04L5/0039—Frequency-contiguous, i.e. with no allocation of frequencies for one user or terminal between the frequencies allocated to another
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H04L5/0069—Allocation based on distance or geographical location
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H04L5/0073—Allocation arrangements that take into account other cell interferences
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload

Definitions

  • the present invention relates to the field of communications, and in particular to a multiple input multiple output in a communication system
  • a base station generally refers to a radio transceiver station capable of transmitting information through a mobile switching center and a terminal in a certain radio coverage area.
  • the base station can communicate with the terminal through the uplink and the downlink, where the downlink refers to the transmission direction of the base station to the terminal, and the uplink refers to the transmission direction of the terminal to the base station.
  • a plurality of terminals may simultaneously transmit data to the base station through the uplink, or may simultaneously receive data from the base station through the downlink.
  • the transmitted data can be relayed between the base station and the terminal through the relay station.
  • the quality of communication between a base station, a terminal, and a relay station is primarily related to the quality of the wireless link and the interference experienced.
  • the same-frequency interference of terminals in other cells received by the base station in the cell is uplink inter-cell interference; the same-frequency interference of the base stations in other cells received by the terminals in the cell is downlink inter-cell interference.
  • the uplink inter-cell interference and the downlink inter-cell interference are collectively referred to as inter-cell interference. If inter-cell interference is severe, the system capacity will be greatly reduced, especially the transmission capacity of the cell edge users will be reduced, thereby affecting the coverage capability of the system and the user's feelings. Therefore, reducing the impact of inter-cell interference on performance is an important goal of cellular system design.
  • OFDM Orthogonal Frequency Division Multiplexing
  • OFDMA Orthogonal Frequency Division Multiple Address
  • LTE Long Term Evolution
  • UMB Ultra Mobile Broadband
  • IEEE 802.16m radio resources are also divided into frames for management, but each Each OFDMA symbol contains multiple mutually orthogonal subcarriers, and The terminal usually occupies part of the subcarriers, so that technologies such as Fractional Frequency Reuse (FFR) can be used to reduce interference and improve coverage.
  • FFR Fractional Frequency Reuse
  • the base station obtains frequency diversity gain and frequency.
  • the selective scheduling gain is used to divide the available physical sub-carriers into physical resource units (PRUs), and then map the physical resource units into a contiguous resource unit (CRU) and a distributed resource unit (Distributed).
  • Resource Unit referred to as DRU
  • DRU Resource Unit
  • base stations need to support multiple different bandwidths (eg, 5MHz, 10MHz or 20MHz) or multi-carrier operation to take advantage of different frequency resources and meet the needs of different operators.
  • the interference suppression of the uplink is similar to that of the downlink, so only the interference suppression method of the downlink is introduced.
  • the techniques for small-area interference cancellation can be divided into the following three categories: Inter-cell-interference randomization (OFDM) technology, Inter-cell-interference cancellation (Inter-cell-interference cancellation) Inter-cell-interference co-ordination/ avoidance technology.
  • Interference randomization is widely used in the 3rd generation mobile communication (3G) system.
  • 3G 3rd generation mobile communication
  • the main advantage is that it does not affect the complexity of receiving and receiving processing at the receiving end, and whitens the interference of neighboring cells ( The inter-cell interference is randomized into white noise), so that the interference is reduced by the terminal receiving process.
  • the specific methods of interference randomization are base station based scrambling code, base station based interleaved multiple access (IDMA) and megabit technology.
  • the principle of the interference cancellation technique is to eliminate the interference signal between cells by the signal processing mode of the terminal. Since the interference cancellation technique is handled by the receiving end and eliminates the strongest interference in all interfering cells, it has great flexibility. At the same time, since the interference cancellation is processed by the terminal, it is a very effective method in engineering practice, which can effectively eliminate interference and greatly improve the performance of the system and the cell edge.
  • downlink interference cancellation technology it mainly refers to interference cancellation based on spatial signal processing; % technology.
  • Interference coordination technology mainly coordinates spatial, temporal and frequency channel resources and power among multiple cells, thereby reducing interference between adjacent cells.
  • Interference coordination technology is a base station based Interference cancellation technology.
  • the downlink interference coordination technology mainly includes interference coordination in the time-frequency domain and interference coordination in the space-time frequency domain, especially the interference coordination technology using multi-antenna technology. Smart antennas and precoding-based beamforming techniques are typical interference coordination techniques.
  • Smart antennas and precoding-based beamforming techniques are typical interference coordination techniques.
  • by setting a specific transmission mode at a specific resource location it is also possible to reduce system interference. Specifically, between adjacent cells, a part (may be all) of the inter-cell-specific or shared time-frequency resources is divided into multiple sub-sets, and each cell occupies one or more sub-set time-frequency resources for the cell edge.
  • Time-frequency domain interference coordination generally needs to be combined with power control. For example, for a cell edge terminal, a larger transmission power can be used, and for a cell center user, a lower transmission power needs to be used.
  • the same MIMO mode or the like is enabled at the same physical resource location between base stations that interfere with each other. In existing communication standards, the system's open-loop MIMO mode has been set up between different cells, and resource alignment is used to control interference.
  • the difference between the open loop and the closed loop is: If the information transmission method of Channel State Information (CSI) is completely unknown at the transmitting end, it is called Open-Loop transmission, and there is no information feedback from the receiving end to the transmission. At the end, the power is equally distributed among the antennas at the transmitting end (eg, open-loop spatial multiplexing and Alamouati space-time coding); if the information transmission mode of the CSI is completely or partially known at the transmitting end, it is called closed-loop transmission.
  • the terminal needs to obtain feedback of the downlink channel state from the receiving end to form a feedback channel, and accordingly, the transmission power is adjusted between the data streams, for example, a beamforming technique and a codebook-based precoding technique.
  • the area in which resources are aligned between different cells is called an open-loop area of MIMO, and the cell base station uses the same or similar MIMO feedback mode and transmission mode for the physical resource.
  • the technical problems existing in the current MIMO open-loop area are as follows:
  • the power control in the open-loop area is not different from the power control mode in the open-loop area, that is, the transmission power of the resources occupied by the open-loop area is still the same as the channel.
  • the conditions are directly related and are adjusted according to the channel conditions of the terminal. Therefore, the total transmit power in the open loop region cannot be controlled, and the interference level between cells in the MIMO open loop region cannot be achieved.
  • the present invention provides a power configuration method for a MIMO open loop region capable of effectively controlling interference And means capable of limiting the power in the MIMO open loop region over the entire physical frequency band to provide a stable interference level, control system interference, and thereby improve spectral efficiency at the cell edge.
  • the present invention provides a power configuration method for a multiple-input multiple-output open-loop region, including: when a base station's available subcarriers are mapped to F frequency partitions, and an i-th frequency partition is set with multiple input and multiple outputs. (MIMO) open-loop region, then the MIMO open-loop region in the i-th frequency partition
  • the used method further includes: negotiating between different base stations, so that the MIMO open-loop area needs to meet one or a combination of the following requirements: the same type of MIMO open-loop area between different base stations occupies the same physical resource location and/or quantity And the power constraint values ⁇ 1 ⁇ and ⁇ 2 ⁇ in the same type of MIMO open-loop region between different base stations are the same.
  • the different base stations refer to different base stations within a cluster, or different base stations within a frequency reuse set. Different base stations negotiate @ ⁇ ⁇ and/or A 2p through management messages or backhauls.
  • the management message is: a multi-base station MIMO cooperative management message, an inter-base station interference coordination management message, or a neighboring area broadcast management message.
  • the method further includes: the base station notifying the terminal of the power constraint values ⁇ 1 ⁇ and ⁇ 2 ⁇ by a broadcast manner or other predefined manner, and the terminal controls the power amplifier of the receiving end according to the ⁇ 1 ⁇ and/or ⁇ 2 ⁇ to make The amplifier gain matching required to receive the signal.
  • the method further includes: the base station carrying the indication information of the MIMO open loop area to the terminal by using a broadcast control channel or a management message, where the indication information includes one or a combination of the following: a resource type in the MIMO open loop area, and an MIMO open loop The resource location occupied by the region, the number of resources occupied by the MIMO open-loop region, and whether the MIMO open-loop region is enabled.
  • the method further includes the base station indicating that the physical resource of the MIMO open loop area of the terminal is only used to send data.
  • the present invention also provides a power configuration apparatus for a multiple-input multiple-output open-loop region, where the power configuration apparatus is configured to: when a available subcarrier of a base station is mapped to F frequency partitions, and an MIMO open loop is set for the i-th frequency partition In the region, the data subcarrier power p 2 of the MIMO open loop region in the i-th frequency partition satisfies:
  • Pout ⁇ Pmax Pout ⁇ Pmax; where ⁇ ⁇ ⁇ is the power difference between the frequency partition and the frequency partition F 0 , 0 ⁇ ⁇ ⁇ , and ⁇ ⁇ 1 , P max is the total of each Orthogonal Frequency Division Multiplexing (OFDM) symbol
  • the maximum value of the transmit power, Pout is the total actual transmit power of each Orthogonal Frequency Division Multiplexing (OFDM) symbol
  • N used is the number of available subcarriers within each OFDM symbol
  • ⁇ 1 ⁇ and ⁇ 2 ⁇ are power constraint values, ⁇ 1 ⁇ and ⁇ 2 ⁇ are both greater than or equal to zero.
  • the invention provides a power configuration method for effectively controlling the transmission power of a base station and effectively controlling inter-base station interference, thereby reducing the interference of the entire network to a certain level and ensuring the service quality of the cell edge users. And the spectrum efficiency of the whole network.
  • FIG. 1 is a schematic diagram of a frame structure of a wireless communication system according to the related art
  • FIG. 2 is a schematic diagram of an open loop area of a frequency partition according to an embodiment of the present invention
  • FIG. 3 is a frequency partitioning method according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of an open loop area of a plurality of frequency partitions according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of power control of an open loop area when multiple frequency partitions are performed according to an embodiment of the present invention.
  • a preferred embodiment of the present invention provides a power configuration method for a MIMO open-loop region, including: when a available subcarrier of a base station is mapped to F frequency partitions, and a MIMO open loop region is set for each frequency partition, Each data subcarrier power P2 of the MIMO open loop region within the i frequency partitions satisfies:
  • the number of data subcarriers is N Data
  • the number of symbols of the pilot subcarriers is N P11 .
  • the power on each pilot subcarrier is dBm
  • the number of subcarriers outside the open loop region is N oL and the transmission power is P oL dBm
  • the number of data subcarriers in the open loop region is ⁇ and each data subcarrier The power is ⁇ 2 dBm. Because Pout is the actual transmit power, p2 satisfies:
  • the base station notifies the terminal of the power constraint value ⁇ 1 ⁇ and by a broadcast method or other predefined manner
  • the terminal adjusts the power amplifier of the receiving end according to the constraint value ⁇ 1 ⁇ and/or ⁇ 2 ⁇ sent by the base station to match the power amplifier gain required by the received signal, thereby achieving the purpose of energy saving and sensitivity improvement.
  • the terminal can also perform uplink power control based on ⁇ 1 ⁇ and/or ⁇ 2 ⁇ of the downlink. Can be divided into two situations:
  • ⁇ 1 ⁇ and ⁇ 2 ⁇ are both greater than or equal to 0, and the unit is dB.
  • a lp is equal to or not equal to A 2p .
  • each data subcarrier power p 2 of the MIMO open loop region in the i th frequency partition satisfies:
  • ⁇ 1 ⁇ and ⁇ 2 ⁇ between different frequency partitions may be the same or different.
  • the power constraint of the MIMO open-loop area is simple, and the interaction information between the base stations is reduced;
  • the resource type of the MIMO open-loop region in different frequency partitions is selected, the corresponding ⁇ 1 ⁇ and
  • the same type of MIMO open-loop area between different base stations occupies the same physical resource location and/or number, and the same type between different base stations
  • the power constraint values ⁇ 1 ⁇ and ⁇ 2 ⁇ in the MIMO open loop region are the same.
  • the different base stations refer to different base stations within a cluster, or different base stations within a frequency reuse set.
  • Different base stations can negotiate through management messages or through backhaul (Backhaul) for background negotiation.
  • the management message may be a multi-base station MIMO cooperative management message, an inter-base station interference coordination management message, or a neighboring area broadcast management message.
  • the method further includes: the base station transmitting the indication information of the MIMO open-loop physical resource to the terminal by using the broadcast control channel or the management message, where the indication information includes one or a combination of the following: a resource type and a backhaul line resource in the MIMO open-loop area. Location, number of resources occupied by the MIMO open-loop region, and whether the MIMO open-loop region is enabled.
  • the control channel may be located in the open loop area. To ensure effective coverage of the user, the transmit power of the control channel is strictly based on the overall interference and the channel quality of the user. Therefore, in some strong interference environments, in order to ensure the control channel.
  • the transmission power is greatly increased, so that the transmission power in the open loop area cannot be controlled to a specific level.
  • the MIMO open-loop physical resource of the terminal is not used for the control channel by using the broadcast control channel or the management message, and is only used for transmitting data, and the control channel includes a physical downlink control channel.
  • a radio resource is divided into superframes in a time domain, each superframe includes 4 frames, and each frame includes 8 subframes.
  • the subframe is composed of 6 basic OFDMA symbols (symbols), and the actual system determines how many OFDMA symbols are included in each level unit in the frame structure according to factors such as bandwidth to be supported and/or cyclic prefix length of the OFDMA symbol.
  • the system can Setting a broadcast control channel (Broadcast Control Channel, hereinafter referred to as BCCH) in the first downlink subframe in the superframe (because it is located in the superframe header, also called a superframe header) and transmitting a resource map, etc.
  • BCCH Broadcast Control Channel
  • System information; and the system can also set up a unicast and/or multicast scheduling (MAP) channel to control the transmission of data.
  • MAP multicast scheduling
  • a plurality of different types of resource units can be designed according to the degree of matching of factors such as channel conditions to support different transmission modes.
  • the process of resource mapping is the process of mapping physical resources to different types of logical resources. For example, according to factors such as networking technology, interference suppression technology, and service type, the resource structure divides the bandwidth available in the frequency domain into multiple frequency partitions.
  • Frequency Partition (Frequency Partition, abbreviated as FP), and then divide the frequency resources in the frequency partition into consecutive resource units and/or distributed resource units for scheduling. For example, as shown in FIG. 2, the available physical subcarriers of one subframe are divided into one frequency partition, and each frequency partition is divided into consecutive logical resource units.
  • CLRU Contiguous Logical Resource Unit
  • DLRU Distributed Logical Resource Unit
  • the available subcarriers are mapped to one frequency partition according to the conditions of the current system, and an open loop region is set on the resource type 2 in order to control interference between different cells.
  • the enabling of the open-loop area is to notify the terminal resource allocation whether to support the use of the open-loop area by setting a signaling "OL Region Enable" in the broadcast control information sent by the base station to the terminal, as shown in Table 1.1.
  • Table 1.1 Table 1.1
  • OL Region Enable 1 , it means that the open loop region can be supported, but there is no need for an open loop region.
  • the size of the open loop area can be notified by other broadcast control information. If it is greater than 0, the open loop area of the size is considered to be activated, as shown in Table 1.2. Table 1.2
  • the power used for data transmission after removing the pilot power is: Then the power of each data subcarrier in the open loop region is p 2 dBmw, and p 2 satisfies:
  • ⁇ 2 ⁇ controls the transmission power of the open loop region.
  • a lp _3dB
  • a 2p 0dB
  • Embodiment 2 In FIG. 4, if the entire available subcarrier of the base station is mapped to 4 frequency partitions, if the frequency partition (0 ⁇ i ⁇ 4) is relative to F.
  • the power Boosted value is 3dB, -3dB, -3dB, ie:
  • each data subcarrier power ⁇ 2 of the open loop region in each frequency partition satisfies:
  • each data subcarrier power p 2 of the MIMO open loop region within frequency partition 0 satisfies:
  • Each data subcarrier power ⁇ 2 of the MIMO open loop region in frequency partition 1 satisfies: ⁇ ⁇
  • each data subcarrier in the open loop region can be set.
  • the initial transmit power is 15mW
  • Aip and A 2p can be set at this time to adjust the dynamic range of the transmit power of each data subcarrier in the open loop region.
  • the Boosted value of the power is 3dB, -3dB, -3dB. It should be noted that: For different base stations or cells, these values may be different, which are related to the scheduling and interference of the base station or the cell. For example, cell 0 can be:
  • the same type of MIMO open-loop area between different base stations occupies the same physical resources and needs to meet the same ⁇ 1 ⁇ and ⁇ 2 ⁇ requirements.
  • the base stations can negotiate or pass management messages.
  • the principle of the above method has no absolute relationship with the system bandwidth.
  • the maximum transmit total power Pmax also changes. For example, if the total transmit power of a 10 MHz system is 43 dBmW, the total transmit rate of the 20 MHz system is 46 dBmW, and the total transmit power of the 5 MHz system is 40 dBmW, which can keep the average power of the subcarriers unchanged.
  • the present invention also provides a power configuration apparatus for a multiple-input multiple-output open-loop region, where the power configuration apparatus is configured to: when a available subcarrier of a base station is mapped into F frequency partitions, and a MIMO open loop region is set for each frequency partition When configuring, each data subcarrier power p 2 of the MIMO open loop region in the i th frequency partition satisfies:
  • ⁇ ⁇ ⁇ is the power difference between the frequency partition and the frequency partition F 0 , 0 ⁇ ⁇ ⁇ , and ⁇ ⁇ 1 ,
  • Pmax is the maximum value of the total transmission power of each Orthogonal Frequency Division Multiplexing (OFDM) symbol
  • N ⁇ is the number of available subcarriers per OFDM symbol
  • ⁇ 1 ⁇ and ⁇ 2 ⁇ are power constraint values, ⁇ 1 ⁇ and ⁇ 2 ⁇ is greater than or equal to zero.
  • the power constraint values ⁇ 1 ⁇ and ⁇ 2 ⁇ between different frequency partitions are the same or different.
  • the power configuration apparatus further notifies the terminal of the power constraint values ⁇ 1 ⁇ and ⁇ 2 ⁇ by a broadcast manner or other predefined manner.
  • the power configuration device further negotiates with other power configuration devices, so that the MIMO open-loop region needs to meet one or a combination of the following: the physical resource location and/or quantity occupied by the same type of MIMO open-loop region between different base stations.
  • the power constraint values ⁇ 1 ⁇ and ⁇ 2 ⁇ in the same type of MIMO open-loop region between the same and different base stations are the same.
  • the negotiation is performed through a management message or a backhaul line.
  • the power configuration device further carries the indication information of the MIMO open loop area to the terminal by using a broadcast control channel or a management message, where the indication information includes one or a combination of the following: MIMO open loop
  • MIMO open loop The resource type in the area, the resource location occupied by the MIMO open-loop area, the number of resources occupied by the MIMO open-loop area, and whether the MIMO open-loop area is enabled.
  • a program to instruct the associated hardware such as a read only memory, a magnetic disk, or an optical disk.
  • all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits.
  • each module/unit in the foregoing embodiment may be implemented in the form of hardware, or may be implemented in the form of a software function module. The invention is not limited to any specific form of combination of hardware and software.
  • the present invention provides a power configuration method and apparatus for effectively controlling a base station transmit power, thereby effectively controlling inter-base station interference, thereby reducing interference of the entire network to a specific level and securing services of cell edge users. Quality and spectral efficiency of the entire network.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention se rapporte à un procédé adapté pour configurer de la puissance dans une région à entrées multiples et à sorties multiples (MIMO, Multiple-Input Multiple-Output) en boucle ouverte. Le procédé selon l'invention comprend les étapes suivantes : quand les sous-porteuses disponibles d'une station de base sont mappées sur des sous-régions de fréquence F et que la région MIMO en boucle ouverte est définie dans la sous-région de fréquence i, la puissance de la sous-porteuse de données p2 de la région MIMO en boucle ouverte dans la sous-région de fréquence i satisfait l'équation: dans laquelle : ΔFi est la différence de puissance entre la sous-région de fréquence Fi et la sous-région de fréquence F0, 0 ≤ i < F et F ≥ 1, Pmax est la valeur maximale de la puissance de transmission totale de chaque symbole de multiplexage par répartition orthogonale de la fréquence (OFDM, Orthogonal Frequency Division Multiplexing), et Pout est la puissance de transmission totale réelle de chaque symbole OFDM ; Nused est le nombre de sous-porteuses disponibles dans chaque symbole OFDM ; et Δlp et Δ2p sont des valeurs de limitation de puissance, Δlp et Δ2p étant toutes les deux égales ou supérieures à 0. La présente invention se rapporte d'autre part à un dispositif de configuration de puissance dans une région MIMO en boucle ouverte. La solution technique de la présente invention permet de garantir la qualité de service pour des utilisateurs en bord de cellule ainsi que l'efficacité spectrale du réseau dans son ensemble.
PCT/CN2010/078091 2010-08-23 2010-10-25 Procédé et dispositif adaptés pour configurer de la puissance dans une région à entrées multiples et à sorties multiples (mimo, multiple-input multiple-output) en boucle ouverte WO2012024856A1 (fr)

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CN105991504B (zh) * 2015-02-17 2021-01-01 索尼公司 无线通信装置及方法、基站、用户设备和通信系统
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CN101043298A (zh) * 2006-03-20 2007-09-26 华为技术有限公司 一种多天线通信中发射信号的方法及系统
US20080107196A1 (en) * 2001-10-19 2008-05-08 Lg Electronics Inc. Method and apparatus for transmitting/receiving signals in multiple-input multiple output communication system provided with plurality of antenna elements
CN101286777A (zh) * 2007-04-13 2008-10-15 华为技术有限公司 基于多天线的信号发送方法、发送设备及其接收设备

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US20080107196A1 (en) * 2001-10-19 2008-05-08 Lg Electronics Inc. Method and apparatus for transmitting/receiving signals in multiple-input multiple output communication system provided with plurality of antenna elements
CN101043298A (zh) * 2006-03-20 2007-09-26 华为技术有限公司 一种多天线通信中发射信号的方法及系统
CN101286777A (zh) * 2007-04-13 2008-10-15 华为技术有限公司 基于多天线的信号发送方法、发送设备及其接收设备

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