WO2010028573A1 - 多载波通信系统中信号误差的反馈方法、设备及系统 - Google Patents

多载波通信系统中信号误差的反馈方法、设备及系统 Download PDF

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Publication number
WO2010028573A1
WO2010028573A1 PCT/CN2009/073566 CN2009073566W WO2010028573A1 WO 2010028573 A1 WO2010028573 A1 WO 2010028573A1 CN 2009073566 W CN2009073566 W CN 2009073566W WO 2010028573 A1 WO2010028573 A1 WO 2010028573A1
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WIPO (PCT)
Prior art keywords
carrier
communication system
central office
specific
signal
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PCT/CN2009/073566
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English (en)
French (fr)
Inventor
方李明
辛德瑞那·拉斐尔
黄庆
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP09812639A priority Critical patent/EP2337295A4/en
Publication of WO2010028573A1 publication Critical patent/WO2010028573A1/zh
Priority to US13/043,981 priority patent/US20110176594A1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0027—Scheduling of signalling, e.g. occurrence thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026—Transmission of channel quality indication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0028—Formatting
    • H04L1/0029—Reduction of the amount of signalling, e.g. retention of useful signalling or differential signalling
    • 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
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • 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
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals

Definitions

  • the present invention relates to the field of communication system technologies, and in particular, to a signal error feedback method, device and system in a multi-carrier communication system.
  • xDSL Digital Subscriber Line
  • UTP Unshielded Twist Pair
  • Crosstalk Crosstalk
  • FEXT far-end crosstalk
  • the access multiplexer has a lower outgoing rate.
  • the far-end crosstalk scenario is as follows: A signal from a central office that provides data transmission to one of the users will cause signal interference to the other client.
  • Vector DSL Vector DSL
  • DSLAM Vector DSL
  • the industry has proposed a vectored-DSL (Vector DSL) technology, which mainly uses DSLAM to perform joint transmission and reception at the central office, and uses signal processing to offset FEXT.
  • the signals sent by each client are aggregated on the DSLAM and jointly received by the DSLAM.
  • the DSLAM preprocesses each signal and sends it jointly.
  • the feedback signal error can be adopted as follows: feedback the current signal error on each subcarrier, so that the central office adjusts the transmission filter in real time, resulting in a large amount of data to be fed back, and the feedback channel and the uplink service for the feedback signal error.
  • the channel occupies the uplink bandwidth together, so the capacity of the feedback channel is limited, and a large amount of data cannot be fed back to the central office in time, so that the central office cannot adjust the transmission filter in real time.
  • Embodiments of the present invention provide a method, device, and system for feeding back signal errors in a multi-carrier communication system, which use a limited feedback channel capacity to feed back signal errors to the central office in time.
  • a feedback method for signal error in a multi-carrier communication system comprising:
  • the signal error is fed back to the office at a corresponding frequency within the communication band of the multi-carrier communication system at a particular subcarrier spacing.
  • a feedback method for signal error in a multi-carrier communication system comprising:
  • a signal error is acquired from a signal received on a corresponding frequency within a communication band of the multi-carrier communication system in accordance with the particular subcarrier spacing.
  • a transmitting device applied to a multi-carrier communication system comprising: a determining unit, configured to determine a specific subcarrier spacing, where the specific subcarrier spacing is greater than an adjacent subcarrier spacing in the multicarrier communication system;
  • a feedback unit configured to feed back a signal error to the central office at a corresponding frequency within a communication band of the multi-carrier communication system according to a specific subcarrier interval.
  • a central office characterized in that:
  • a determining unit configured to determine a specific subcarrier spacing, where the specific subcarrier spacing is greater than an adjacent subcarrier spacing in the multicarrier communication system
  • a receiving unit configured to receive a signal fed back by the client
  • an obtaining unit configured to acquire a signal error from a signal received on a corresponding frequency in a communication band of the multi-carrier communication system according to the specific sub-carrier interval.
  • a multi-carrier communication system characterized in that the multi-carrier communication system comprises a client and a central office;
  • the client is configured to feed back a signal error to the central office on a corresponding frequency in a communication frequency band of the multi-carrier communication system according to a specific sub-carrier interval, where the specific sub-carrier spacing is greater than an adjacent sub-carrier spacing in the multi-carrier communication system;
  • the central office is configured to acquire a signal error from a signal received on a corresponding frequency in a communication frequency band of the multi-carrier communication system according to the specific sub-carrier interval.
  • the method, device and system for feeding back signal errors in a multi-carrier communication system provided by an embodiment of the present invention, by setting a specific sub-carrier interval, and then feeding back a signal error according to a frequency of a specific sub-carrier interval, so that the client returns a signal to the central office.
  • the error will be reduced a lot.
  • the specific subcarrier spacing is represented as 10 subcarriers.
  • the client returns a signal error to the central office every 10 subcarriers, so that the central office can adjust the transmission according to the signal error. Filters, which in turn increase channel capacity and line rate.
  • the embodiment can reduce the amount of data fed back to the central office without occupying too much compared with the case of the feedback signal error in each subcarrier in the prior art. More upstream bandwidth, so that the feedback channel will not be blocked. Thereby, the signal error is timely fed back to the central office in a limited feedback channel capacity.
  • FIG. 2 is a flowchart of a client feedback method according to Embodiment 1 of the present invention.
  • Embodiment 3 is a flowchart of a method for processing a central office processing in Embodiment 1 of the present invention
  • FIG. 4 is a block diagram of a client in Embodiment 1 of the present invention.
  • Figure 5 is a block diagram of a central office in Embodiment 1 of the present invention.
  • FIG. 6 is a flowchart of a client feedback method in Embodiment 2 of the present invention.
  • FIG. 7 is a flowchart of a method for processing a central office processing in Embodiment 2 of the present invention.
  • FIG. 8 is a block diagram of a client in Embodiment 2 of the present invention.
  • Embodiment 9 is a block diagram of a central office in Embodiment 2 of the present invention.
  • FIG. 10 is a flowchart of a client feedback method in Embodiment 3 of the present invention.
  • FIG. 11 is a flowchart of a method for processing a central office processing in Embodiment 3 of the present invention.
  • FIG. 12 is a block diagram of a client in Embodiment 3 of the present invention.
  • Figure 13 is a block diagram of a central office in Embodiment 3 of the present invention.
  • the present embodiment provides a feedback method for the signal error. As shown in FIG. 2, the method includes the following steps:
  • a specific subcarrier spacing needs to be determined; in general, determination of a specific subcarrier spacing
  • MIB Management Information Base
  • MIB Management Information Base
  • the signal error is fed back to the central office on the corresponding frequency in the communication frequency band of the multi-carrier communication system, for example, the interval represented by the subcarrier spacing corresponds to 10
  • the signal error is fed back to the central office every 10 subcarriers in the communication band of the multicarrier communication system.
  • the signal error on the corresponding frequency can be carried on the frequency to be fed back to the frequency every 10 subcarriers. Bureau.
  • the embodiment of the invention further provides a feedback method for signal error in a multi-carrier communication system. As shown in FIG. 3, the method includes the following steps:
  • the method also needs to determine a specific subcarrier spacing first, and the specific determining manner may also be: unified by the operator before the online power transmission through the MIB interface; or during the line initialization process. , specified according to the specific circumstances; or in the process of normal operation of the line, according to the specific circumstances.
  • the embodiment first receives the signal fed back by the client.
  • the embodiment After receiving the feedback signal, the embodiment obtains a signal error from the received signal according to the frequency corresponding to the specific subcarrier interval, for example, the interval frequency indicated by the specific subcarrier interval corresponds to 10 subcarriers, and the central office will The signal error is obtained from the corresponding subcarriers every 10 subcarriers. After obtaining these signal errors, the central office can calculate the corresponding channel parameters according to the signal error, and then use the interpolation estimation method to feedback the signal error. The channel parameters corresponding to the subcarriers estimate the channel parameters corresponding to the other subcarriers, and perform adjustment of the corresponding transmission filters.
  • the embodiment further provides a transmitting apparatus applied to the multi-carrier communication system.
  • the transmitting apparatus applied to the multi-carrier communication system includes: determining unit 41 and feedback unit 42.
  • the determining unit 41 is configured to determine a specific subcarrier spacing, which may be uniformly specified by the operator before the online power transmission through the MIB interface; or may be specified according to a specific situation during the line initialization process; In the course of normal work, it is specified according to the specific situation.
  • the feedback unit 42 is configured to feed back the signal error to the central office according to the frequency corresponding to the specific subcarrier interval.
  • the embodiment further provides a central office.
  • the central office includes: a determining unit 51, a receiving unit 52, and an obtaining unit 53.
  • the determining unit 51 is configured to determine a specific subcarrier spacing, and the implementation is the same as the determining unit 41 of the client; the receiving unit 52 is configured to receive a signal fed back by the client; and the obtaining unit 53 is configured to use the frequency corresponding to the subcarrier spacing.
  • the signal error is obtained from the received signal.
  • the client can simultaneously feed the specific subcarrier spacing and signal error to the central office, so as to reduce the number of communication between the client and the central office, and reduce the bandwidth occupation.
  • the transmitting device and the central office applied to the multi-carrier communication system in this embodiment may form a multi-carrier communication system, wherein the transmitting device applied to the multi-carrier communication system is set on the client, so the client in the system For reporting a signal error to the central office at a corresponding frequency within a communication band of the multi-carrier communication system according to a specific sub-carrier interval; the central office in the system is configured to communicate from the multi-carrier communication system according to the specific sub-carrier interval The signal received on the corresponding frequency within the acquisition signal error.
  • the specific subcarrier spacing in the system is greater than the adjacent subcarrier spacing in the multicarrier communication system.
  • the signal error feedback method and device provided by the embodiment of the present invention, by setting a specific subcarrier interval, and then feeding back the signal error according to the frequency corresponding to the specific subcarrier interval, so that the signal error returned by the client to the central office will be greatly reduced.
  • the specific subcarrier spacing is represented by 10 subcarriers
  • the client returns a signal error to the central office every 10 subcarriers, so that the central office adjusts the transmission filter according to the signal error, thereby improving Channel capacity and line Road rate.
  • the embodiment can reduce the amount of data fed back to the central office without occupying too much compared with the case of the feedback signal error in each subcarrier in the prior art.
  • the uplink bandwidth is increased, so that the congestion of the feedback channel is not caused, so that the signal error is timely fed back to the central office in the limited feedback channel capacity.
  • the embodiment provides a feedback method for signal error in a multi-carrier communication system. As shown in FIG. 6, the feedback method includes the following steps:
  • the central office presets a specific subcarrier spacing, where the specific subcarrier spacing is greater than an adjacent subcarrier spacing in the multicarrier communication system.
  • the specific subcarrier spacing may be the number of the spaced subcarriers, for example, setting a specific subcarrier spacing to M, indicating M subcarrier widths (M is an integer greater than 1); the specific subcarrier spacing may also be a spacer subcarrier.
  • the frequency width value such as setting a specific subcarrier spacing to be M Af, Af represents the adjacent subcarrier frequency width value in the multicarrier communication system.
  • the setting mode in this embodiment is: specified by the operator through the MIB interface before online power on-line; or specified in the process of line initialization, according to specific conditions; or in the process of normal working of the line, according to specific conditions . It is assumed that the specific subcarrier spacing set in this embodiment is 10 subcarriers.
  • the central office sends the set specific subcarrier interval to the client.
  • the client receives a specific subcarrier interval sent by the central office, and uses the received specific subcarrier interval as a subcarrier interval for the feedback signal error.
  • the client feeds back information about the starting subcarrier to the central office.
  • the client feeds back a signal error to the central office according to the frequency corresponding to the specific subcarrier interval from the initial subcarrier. For the present embodiment, starting from the initial subcarrier, a signal error is fed back to the central office every 10 subcarriers.
  • the feedback method of the signal error in this embodiment also has a corresponding processing manner at the central office.
  • the process of the central office includes the following steps: 701. The central office receives information about a starting subcarrier that is fed back by the client.
  • the central office receives the signal fed back by the client.
  • the central office needs to receive a corresponding feedback signal from the feedback channel.
  • the central office acquires a signal error from the received signal according to a frequency corresponding to the specific subcarrier interval.
  • a signal error is obtained from the feedback information every 10 subcarriers.
  • the central office uses the signal error to calculate the corresponding channel parameters, and then uses the interpolation estimation method to estimate the channel parameters corresponding to the other subcarriers from the channel parameters corresponding to the subcarriers that fed back the signal error, and The transmission filter is adjusted based on the channel parameters to increase channel capacity and line rate.
  • the embodiment further provides a client.
  • the client includes: a determining unit 81 and a feedback unit 82.
  • the determining unit 81 is configured to determine a specific sub-carrier interval.
  • the determining unit 81 in this embodiment determines the sub-carrier spacing sent by the central office by determining the sub-carrier spacing in the embodiment. Carrier spacing.
  • the feedback unit 82 is configured to feed back the information of the starting subcarrier to the central office, and the feedback unit 82 in this embodiment is used to feed back the signal error to the central office according to the frequency corresponding to the specific subcarrier interval. .
  • the embodiment further provides a central office.
  • the central office includes: a determining unit 91, a receiving unit 92, and an obtaining unit 93.
  • the determining unit 91 is configured to determine a specific subcarrier spacing.
  • the central office in this embodiment needs to send the specific subcarrier spacing to the client after determining the specific subcarrier spacing.
  • the receiving unit 92 is configured to receive information of the starting subcarrier fed back by the client, and the receiving unit 92 is further configured to receive a signal fed back by the client.
  • the obtaining unit 93 is configured according to the The frequency corresponding to the particular subcarrier spacing acquires a signal error from the received signal.
  • the client can feed back the information of the initial subcarrier and the signal error to the central office at the same time, so as to reduce the number of communications between the client and the central office, and reduce the bandwidth occupation.
  • the specific subcarrier spacing in this embodiment is determined by the central office, which can facilitate unified management. Since the signal error is only feedback according to the specific subcarrier spacing in this embodiment, the embodiment can reduce the amount of data fed back to the central office without occupying too much compared with the case of the feedback signal error in each subcarrier in the prior art.
  • the uplink bandwidth is increased, so that the congestion of the feedback channel is not caused, so that the signal error is timely fed back to the central office in the limited feedback channel capacity.
  • This embodiment provides a feedback method for signal error. As shown in FIG. 10, the feedback method includes the following steps:
  • the client presets a specific subcarrier spacing, where the specific subcarrier spacing is greater than an adjacent subcarrier spacing in the multicarrier communication system. For example, setting a specific subcarrier spacing to M, indicating M subcarrier widths (M is an integer greater than 1), of course, it is also possible to set a specific subcarrier spacing to a value of M subcarrier widths, such as M x ⁇ ; ⁇ Adjacent subcarrier frequency width values in a multi-carrier communication system.
  • the setting mode in this embodiment is: specified by the operator before the online power transmission through the ⁇ interface; or specified in the process of line initialization, according to the specific situation; or in the process of normal operation of the line, according to the specific situation . It is assumed that the specific subcarrier spacing set in this embodiment is 10 subcarriers.
  • the client sends the set specific subcarrier interval to the central office.
  • the client sets a specific subcarrier spacing as a subcarrier spacing for feedback signal error.
  • the client feeds back information about the starting subcarrier to the central office.
  • the client feeds back a signal error to the central office according to the frequency corresponding to the specific subcarrier interval from the starting subcarrier. For the present embodiment, starting from the initial subcarrier, a signal error is fed back to the central office every 10 subcarriers.
  • the feedback method of the signal error in this embodiment also has a corresponding processing manner at the central office.
  • the processing of the central office includes the following steps:
  • the central office receives a specific subcarrier interval sent by the client.
  • the central office receives information about a starting subcarrier that is fed back by the client.
  • the central office receives the signal fed back by the client.
  • the central office needs to receive a corresponding feedback signal from the feedback channel.
  • the central office acquires a signal error according to the signal received on a corresponding frequency in a communication band of the multi-carrier communication system according to the specific subcarrier spacing.
  • a signal error is obtained from the feedback information every 10 subcarriers.
  • the central office uses the signal error to calculate the corresponding channel parameters, and then uses the interpolation estimation method to estimate the channel parameters corresponding to the other subcarriers from the channel parameters corresponding to the subcarriers that fed back the signal error, and The transmission filter is adjusted based on the channel parameters to increase channel capacity and line rate.
  • the embodiment further provides a client.
  • the client includes: a determining unit 121, a sending unit 122, and a feedback unit 123.
  • the determining unit 121 is configured to determine a specific subcarrier interval, and after determining the specific subcarrier interval, send the specific subcarrier interval to the central office by using the sending unit 122.
  • the feedback unit 123 is configured to feed back information of the starting subcarrier to the central office, and the feedback unit 123 in this embodiment is configured to correspond to the communication frequency band of the multicarrier communication system according to the specific subcarrier interval. The frequency is fed back to the central office to feedback the signal error.
  • the embodiment further provides a central office.
  • the central office includes: a determining unit 131, a receiving unit 132, and an obtaining unit 1333.
  • the determining unit 131 is configured to determine a specific subcarrier spacing.
  • the specific subcarrier spacing is determined by receiving a specific subcarrier spacing sent by the client.
  • the receiving unit 132 is configured to receive information of the starting subcarrier fed back by the client, and the receiving unit 132 is further configured to receive a signal fed back by the client.
  • the obtaining unit 133 is configured according to the The particular subcarrier spacing acquires a signal error from a signal received on a corresponding frequency within the communication band of the multi-carrier communication system.
  • the client can feed back the information of the initial subcarrier, the specific subcarrier spacing, and the signal error to the central office at the same time, so as to reduce the number of communications between the client and the central office, and reduce the bandwidth occupation.
  • the specific subcarrier spacing in this embodiment is determined by the client, which is advantageous for the client to determine the corresponding subcarrier spacing according to its specific situation, which is beneficial to realizing the dynamic change of the subcarrier spacing.
  • the embodiment can reduce the amount of data fed back to the central office in the case of the feedback signal error in each subcarrier in the prior art, and It takes up too much upstream bandwidth, so that it does not cause congestion of the feedback channel, so that the signal error is timely fed back to the central office in a limited feedback channel capacity.
  • the present invention can be implemented by means of software plus necessary general hardware, and of course, by hardware, but in many cases, the former is a better implementation. .
  • the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a readable storage medium, such as a floppy disk of a computer.
  • a hard disk or optical disk or the like includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present invention.
  • the multi-carrier communication system includes an xDSL communication system, and the multi-carrier communication system can also be various wireless communication systems, such as a mobile communication system.

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Description

多载波通信系统中信号误差的反馈方法、 设备及系统 本申请要求了 2008年 9月 9日提交的、 申请号为 200810211906.2、 发明 名称为多载波通信系统中信号误差的反馈方法、 设备及系统的中国专利申请 的优选权， 其全部内容通过引用结合在本申请中。 技术领域
本发明涉及通信系统技术领域， 尤其涉及多载波通信系统中信号误差的 反馈方法、 设备及系统。
背景技术
xDSL (Digital Subscriber Line,数字用户线路)是一种在电话双绞线（无屏蔽 双绞线， Unshielded Twist Pair, UTP )传输的高速数据传输技术， 随着 xDSL 技术使用的频带提高， 串扰（ Crosstalk )尤其是高频段的串扰问题表现得日益 突出。 当一捆电缆内有多路用户都要求开通 xDSL 业务时， 会因为远端串扰 ( FEXT )使一些线路速率低、性能不稳定、甚至不能开通等，最终导致 DSLAM ( DSL Access Multiplexer, 数字用户线路接入复用器）的出线率比较低。 如图 1所示， 远端串扰的情景为： 为其中一个用户提供数据发送的局端设备发出的 信号会对另一个用户端产生信号干扰。
目前业界提出了 vectored - DSL (矢量 DSL )技术， 主要利用 DSLAM在 局端进行联合的收发， 使用信号处理的方法来抵消 FEXT。 对于上行信号， 各 个用户端发送的信号在 DSLAM上汇聚， 由 DSLAM进行联合接收； 对于下 行信号， DSLAM把各路信号预处理后进行联合发送。
在 vectored - DSL技术中， 需要不断监视信号误差的变化， 然后根据变化 后的信号误差对联合发送中的发送滤波器以及联合接收中的接收滤波器进行 调整， 以适应信号误差的变化。 当接收滤波器和发送滤波器调整合理的时候， 大部分串扰噪声被抵消了， 使得信噪比提升很多， 进而信道容量或线路速率 也得到很大的提升。 在监视下行信道的信号误差时， 由于下行信道的发送滤波器在局端， 而 同时信号误差的检测是由用户端完成的， 那么用户端需将检测出的信号误差 通过上行信道反馈给局端， 以便局端对发送滤波器进行调整。
在实现上述反馈信号误差的过程中， 发明人发现现有技术中至少存在如 下问题：
目前反馈信号误差可采用的方案为： 反馈每个子载波上当前的信号误差， 以便局端实时调整发送滤波器， 造成需要反馈的数据量较大， 由于反馈信号 误差用的反馈信道与上行的业务信道一起占用上行带宽， 因此反馈信道的容 量受到限制， 不能将大量数据及时反馈给局端， 使得局端无法实时调整发送 滤波器。
发明内容
本发明的实施例提供一种多载波通信系统中信号误差的反馈方法、 设备 及系统， 利用有限的反馈信道容量， 将信号误差及时地反馈给局端。
为达到上述目的， 本发明的实施例采用如下技术方案：
一种多载波通信系统中信号误差的反馈方法， 包括：
确定特定子载波间隔， 所述特定子载波间隔大于多载波通信系统中相邻 子载波间隔；
按照特定子载波间隔， 在多载波通信系统通信频带内对应的频率上向局 端反馈信号误差。
一种多载波通信系统中信号误差的反馈方法， 包括：
确定特定子载波间隔， 所述特定子载波间隔大于多载波通信系统中相邻 子载波间隔；
接收客户端反馈的信号；
按照所述特定子载波间隔， 从多载波通信系统通信频带内对应的频率上 接收的信号获取信号误差。
一种应用于多载波通信系统的发送装置， 包括： 确定单元， 用于确定特定子载波间隔， 所述特定子载波间隔大于多载波 通信系统中相邻子载波间隔；
反馈单元， 用于按照特定子载波间隔， 在多载波通信系统通信频带内对 应的频率上向局端反馈信号误差。
一种局端， 其特征在于， 包括：
确定单元， 用于确定特定子载波间隔， 所述特定子载波间隔大于多载波 通信系统中相邻子载波间隔；
接收单元， 用于接收客户端反馈的信号；
获取单元， 用于按照所述特定子载波间隔， 从多载波通信系统通信频带 内对应的频率上接收的信号获取信号误差。
一种多载波通信系统， 其特征在于， 所述多载波通信系统包括客户端和 局端；
所述客户端， 用于按照特定子载波间隔， 在多载波通信系统通信频带内 对应的频率上向局端反馈信号误差， 所述特定子载波间隔大于多载波通信系 统中相邻子载波间隔；
所述局端， 用于按照所述特定子载波间隔， 从多载波通信系统通信频带 内对应的频率上接收的信号获取信号误差。
本发明实施例提供的多载波通信系统中信号误差的反馈方法、 设备及系 统， 通过设定特定子载波间隔， 然后按照特定子载波间隔的频率来反馈信号 误差， 这样客户端返回给局端的信号误差将会减少很多， 例如： 特定子载波 间隔表示为间隔 10个子载波， 那么在实际运用时， 客户端每隔 10子载波就 向局端返回一个信号误差， 以便局端按照该信号误差调整发送滤波器， 进而 提升信道容量和线路速率。
由于本实施例中只是按照特定子载波间隔反馈信号误差， 相对于现有技 术中在每个子载波中反馈信号误差的情况而言， 本实施例能够减少反馈给局 端的数据量， 不会占用太多的上行带宽， 这样就不会造成反馈信道的堵塞， 从而实现在有限的反馈信道容量中将信号误差及时地反馈给局端。 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它的附图。
图 1为现有技术中远端串扰的示意图；
图 2为本发明实施例 1中客户端反馈方法的流程图；
图 3为本发明实施例 1中局端处理反馈方法的流程图；
图 4为本发明实施例 1中客户端的框图；
图 5为本发明实施例 1中局端的框图；
图 6为本发明实施例 2中客户端反馈方法的流程图；
图 7为本发明实施例 2中局端处理反馈方法的流程图；
图 8为本发明实施例 2中客户端的框图；
图 9为本发明实施例 2中局端的框图；
图 10为本发明实施例 3中客户端反馈方法的流程图；
图 11为本发明实施例 3中局端处理反馈方法的流程图；
图 12为本发明实施例 3中客户端的框图；
图 13为本发明实施例 3中局端的框图。
具体实施方式
下面结合附图对本发明实施例多载波通信系统中信号误差的反馈方法、 设备和系统进行详细描述。
实施例 1:
为了在有限的反馈信道容量中将信号误差及时地反馈给局端， 本实施例 提供一种信号误差的反馈方法， 如图 2所示， 该方法包括如下步骤：
201、 首先需要确定特定子载波间隔； 一般来说， 特定子载波间隔的确定 方式有很多种， 例如： 由运营商在线路上电之前通过 MIB ( Management Information Base, 管理资讯库）接口统一指定； 也可以在线路初始化的过程 中， 根据具体情况指定； 也可以在线路正常工作的过程中， 根据具体的情况 来指定。
202、 当有了确定的特定子载波间隔后， 按照特定子载波间隔， 在多载波 通信系统通信频带内对应的频率上向局端反馈信号误差， 例如： 子载波间隔 表示的间隔时间刚好对应 10个子载波， 则在多载波通信系统通信频带内每隔 10个子载波就向局端反馈一次信号误差， 具体的， 可以每隔 10个子载波， 将 对应频率上的信号误差承载在该频率上反馈给局端。
本发明实施例还提供一种多载波通信系统中信号误差的反馈方法，如图 3 所示， 该方法包括如下步骤：
301、 与图 2中的方法一样， 该方法也需要先确定特定子载波间隔， 其具 体的确定方式也可以为： 由运营商在线路上电之前通过 MIB接口统一指定； 或者在线路初始化的过程中， 根据具体情况指定； 或者在线路正常工作的过 程中， 根据具体的情况来指定。
302、 为了对发送滤波器进行调整， 以提升信道容量和线路速率， 本实施 例先要接收客户端反馈的信号。
303、 在接收到反馈信号后， 本实施例按照所述特定子载波间隔对应的频 率从接收的信号获取信号误差， 例如： 特定子载波间隔表示的间隔频率刚好 对应 10个子载波， 那么局端会每隔 10个子载波从对应的子载波中获取到信 号误差， 得到这些信号误差后， 局端就能够可以根据信号误差计算出相应的 信道参数， 然后利用插值估算的方法， 从反馈了信号误差的子载波对应的信 道参数估算出其他子载波对应的信道参数， 并进行相应发送滤波器的调整。
对应于图 2 中描述的信号误差的反馈方法， 本实施例还提供一种应用于 多载波通信系统的发送装置， 如图 4所示， 该应用于多载波通信系统的发送 装置包括： 确定单元 41和反馈单元 42。 其中， 确定单元 41用于确定特定子载波间隔， 该特定子载波间隔可以由 运营商在线路上电之前通过 MIB接口统一指定； 也可以在线路初始化的过程 中， 根据具体情况指定； 也可以在线路正常工作的过程中， 根据具体的情况 来指定。 反馈单元 42用于按照特定子载波间隔对应的频率向局端反馈信号误 差。
对应于图 3 中描述的信号误差的反馈方法， 本实施例还提供一种局端， 如图 5所示， 该局端包括： 确定单元 51、 接收单元 52和获取单元 53。
其中， 确定单元 51用于确定特定子载波间隔， 其实现方式和客户端的确 定单元 41相同； 接收单元 52用于接收客户端反馈的信号； 获取单元 53用于 按照所述子载波间隔对应的频率从接收的信号获取信号误差。
在本实施例中如果特定子载波间隔由客户端来设置， 那么客户端可以将 特定子载波间隔和信号误差同时反馈给局端， 以便减少客户端与局端之间的 通信次数， 减少带宽占用。
本实施例中应用于多载波通信系统的发送装置以及局端可以组成一个多 载波通信系统， 其中的应用于多载波通信系统的发送装置是设置在客户端上 的， 所以本系统中的客户端用于按照特定子载波间隔， 在多载波通信系统通 信频带内对应的频率上向局端反馈信号误差； 本系统中的局端用于按照所述 特定子载波间隔， 从多载波通信系统通信频带内对应的频率上接收的信号获 取信号误差。
对应于上述本实施例提供的方法， 该系统中所述的特定子载波间隔大于 多载波通信系统中相邻子载波间隔。
本发明实施例提供的信号误差的反馈方法及设备， 通过设定特定子载波 间隔， 然后按照特定子载波间隔对应的频率来反馈信号误差， 这样客户端返 回给局端的信号误差将会减少很多， 例如： 特定子载波间隔表示为间隔 10个 子载波， 那么在实际运用时， 客户端每隔 10子载波就向局端返回一个信号误 差， 以便局端按照该信号误差进行调整发送滤波器， 进而提升信道容量和线 路速率。
由于本实施例中只是按照特定子载波间隔反馈信号误差， 相对于现有技 术中在每个子载波中反馈信号误差的情况而言， 本实施例能够减少反馈给局 端的数据量， 不会占用太多的上行带宽， 这样就不会造成反馈信道的堵塞， 从而实现在有限的反馈信道容量中将信号误差及时地反馈给局端。
实施例 2:
本实施例提供一种多载波通信系统中信号误差的反馈方法， 如图 6所示， 该反馈方法包括如下步骤：
601、 局端预先设置一个特定子载波间隔， 该特定子载波间隔大于多载波 通信系统中相邻子载波间隔。 该特定子载波间隔可以为间隔子载波的个数， 例如，设定特定子载波间隔为 M,表示 M个子载波宽度（M为大于 1的整数）； 该特定子载波间隔也可以为间隔子载波的频率宽度值， 如设定特定子载波间 隔为 M Af, Af表示多载波通信系统中相邻子载波频率宽度值。本实施例中的 设置方式为： 由运营商在线路上电之前通过 MIB接口统一指定； 或者在线路 初始化的过程中， 根据具体情况指定； 或者在线路正常工作的过程中， 根据 具体的情况来指定。 假设本实施例中设定的特定子载波间隔为 10个子载波。
602、 局端将设置好的特定子载波间隔发送给客户端。
603、 客户端接收局端发送的特定子载波间隔， 并将接收到的特定子载波 间隔作为反馈信号误差用的子载波间隔。
604、 客户端向局端反馈起始子载波的信息。
605、 客户端从上述的起始子载波开始按照特定子载波间隔对应的频率向 局端反馈信号误差。 对于本实施例来说， 就是从起始子载波开始， 每隔 10个 子载波就向局端反馈一次信号误差。
本实施例中的信号误差的反馈方法， 在局端也有相应的处理方式， 如图 7 所示， 由于在图 6 中局端已经设置特定子载波间隔并将特定子载波间隔发送 给了客户端， 此处不再赘述， 局端的处理过程包括如下步骤： 701、 局端接收客户端反馈的起始子载波的信息。
702、 局端接收客户端反馈的信号， 具体实现时， 局端是需要从反馈信道 上接收到相应的反馈信号的。
703、 从上述的起始子载波开始， 局端按照所述特定子载波间隔对应的频 率从接收的信号获取信号误差。 对于本实施例来说， 就是从起始子载波开始， 每隔 10个子载波就向从反馈的信息中获取一次信号误差。
在获取了信号误差之后， 局端利用信号误差计算出相应的信道参数， 然 后利用插值估算的方法， 从反馈了信号误差的子载波对应的信道参数估算出 其他子载波对应的信道参数， 并将根据信道参数进行发送滤波器的调整， 以 便提升信道容量和线路速率。
对应于图 6中信号误差的反馈方法， 本实施例还提供一种客户端， 如图 8 所示， 该客户端包括： 确定单元 81和反馈单元 82。
其中， 确定单元 81用于确定特定子载波间隔， 由于本实施例中的子载波 间隔由局端设置， 所以本实施例中的确定单元 81通过接收由局端发送的特定 子载波间隔来确定子载波间隔。 反馈单元 82用于向局端反馈起始子载波的信 息， 从所述的起始子载波开始， 本实施例中的反馈单元 82用于按照特定子载 波间隔对应的频率向局端反馈信号误差。
对应于图 7中的方法， 本实施例还提供一种局端， 如图 9所示， 该局端 包括： 确定单元 91、 接收单元 92和获取单元 93。
其中， 确定单元 91用于确定特定子载波间隔， 本实施例中的局端在确定 特定子载波间隔后还需要将该特定子载波间隔发送给客户端。 接收单元 92用 于接收客户端反馈的起始子载波的信息， 并且接收单元 92还用于接收客户端 反馈的信号； 从接收单元 92接收到的起始子载波开始， 获取单元 93按照所 述特定子载波间隔对应的频率从接收的信号获取信号误差。
在本实施例中客户端可以将起始子载波的信息和信号误差同时反馈给局 端， 以便减少客户端与局端之间的通信次数， 减少带宽占用。 本实施例中的特定子载波间隔由局端确定， 这样可以便于统一管理。 由 于本实施例中只是按照特定子载波间隔反馈信号误差， 相对于现有技术中在 每个子载波中反馈信号误差的情况而言， 本实施例能够减少反馈给局端的数 据量， 不会占用太多的上行带宽， 这样就不会造成反馈信道的堵塞， 从而实 现在有限的反馈信道容量中将信号误差及时地反馈给局端。
实施例 3:
本实施例提供一种信号误差的反馈方法， 如图 10所示， 该反馈方法包括 如下步骤：
1001、 客户端预先设置一个特定子载波间隔， 该特定子载波间隔大于多 载波通信系统中相邻子载波间隔。 例如， 设定特定子载波间隔为 M , 表示 M 个子载波宽度（M为大于 1 的整数）， 当然也可以设定特定子载波间隔为 M 个子载波宽度的值，如 M x Δί; Δί·表示多载波通信系统中相邻子载波频率宽度 值。 本实施例中的设置方式为： 由运营商在线路上电之前通过 ΜΙΒ接口统一 指定； 或者在线路初始化的过程中， 根据具体情况指定； 或者在线路正常工 作的过程中， 根据具体的情况来指定。 假设本实施例中设定的特定子载波间 隔为 10个子载波。
1002、 客户端将设置好的特定子载波间隔发送给局端。
1003、 客户端将设置好的特定子载波间隔作为反馈信号误差用的子载波 间隔。
1004、 客户端向局端反馈起始子载波的信息。
1005、 客户端从上述的起始子载波开始按照特定子载波间隔对应的频率 向局端反馈信号误差。 对于本实施例来说， 就是从起始子载波开始， 每隔 10 个子载波就向局端反馈一次信号误差。
本实施例中的信号误差的反馈方法， 在局端也有相应的处理方式， 如图 11所示， 局端的处理过程包括如下步骤：
1101、 局端接收客户端发送的特定子载波间隔。 1102、 局端接收客户端反馈的起始子载波的信息。
1103、 局端接收客户端反馈的信号， 具体实现时， 局端是需要从反馈信 道上接收到相应的反馈信号的。
1104、 从上述的起始子载波开始， 局端按照所述特定子载波间隔从多载 波通信系统通信频带内对应的频率上接收的信号获取信号误差。 对于本实施 例来说， 就是从起始子载波开始， 每隔 10个子载波就从反馈的信息中获取一 次信号误差。
在获取了信号误差之后， 局端利用信号误差计算出相应的信道参数， 然 后利用插值估算的方法， 从反馈了信号误差的子载波对应的信道参数估算出 其他子载波对应的信道参数， 并将根据信道参数进行发送滤波器的调整， 以 便提升信道容量和线路速率。
对应于图 10中信号误差的反馈方法， 本实施例还提供一种客户端， 如图 12所示， 该客户端包括： 确定单元 121、 发送单元 122和反馈单元 123。
其中， 确定单元 121 用于确定特定子载波间隔， 在确定特定子载波间隔 后， 通过发送单元 122将所述特定子载波间隔发送给局端。 反馈单元 123用 于向局端反馈起始子载波的信息， 从所述的起始子载波开始， 本实施例中的 反馈单元 123 用于按照特定子载波间隔在多载波通信系统通信频带内对应的 频率上向局端反馈信号误差。
对应于图 11 中的方法， 本实施例还提供一种局端， 如图 13所示， 该局 端包括： 确定单元 131、 接收单元 132和获取单元 1333。
其中， 确定单元 131 用于确定特定子载波间隔， 本实施例中通过接收客 户端发送的特定子载波间隔来确定特定子载波间隔。 接收单元 132用于接收 客户端反馈的起始子载波的信息， 并且接收单元 132还用于接收客户端反馈 的信号； 从接收单元 132接收到的起始子载波开始， 获取单元 133按照所述 特定子载波间隔从多载波通信系统通信频带内对应的频率上接收的信号获取 信号误差。 在本实施例中客户端可以将起始子载波的信息、 特定子载波间隔和信号 误差同时反馈给局端， 以便减少客户端与局端之间的通信次数， 减少带宽占 用。
本实施例中的特定子载波间隔由客户端确定， 这样有利于客户端根据其 具体情况确定相应的子载波间隔， 有利于实现子载波间隔的动态变化。 同时， 由于本实施例中只是按照特定子载波间隔反馈信号误差， 相对于现有技术中 在每个子载波中反馈信号误差的情况而言， 本实施例能够减少反馈给局端的 数据量， 不会占用太多的上行带宽， 这样就不会造成反馈信道的堵塞， 从而 实现在有限的反馈信道容量中将信号误差及时地反馈给局端。
通过以上的实施方式的描述， 所属领域的技术人员可以清楚地了解到本 发明可借助软件加必需的通用硬件的方式来实现， 当然也可以通过硬件， 但 很多情况下前者是更佳的实施方式。 基于这样的理解， 本发明的技术方案本 质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来， 该 计算机软件产品存储在可读取的存储介质中， 如计算机的软盘， 硬盘或光盘 等， 包括若干指令用以使得一台计算机设备（可以是个人计算机， 服务器， 或者网络设备等）执行本发明各个实施例所述的方法。
本发明实施例所涉及的多载波通信系统包括 xDSL通信系统，多载波通信 系也可为各种无线通信系统， 例如： 移动通信系统。
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 想到的变化或替换， 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、 一种多载波通信系统中信号误差的反馈方法， 其特征在于， 包括： 确定特定子载波间隔， 所述特定子载波间隔大于多载波通信系统中相邻子 载波间隔；
按照特定子载波间隔， 在多载波通信系统通信频带内对应的频率上向局端 反馈信号误差。
2、 根据权利要求 1所述的多载波通信系统中信号误差的反馈方法， 其特征 在于， 该方法还包括： 向局端反馈起始子载波的信息；
所述按照特定子载波间隔， 在多载波通信系统通信频带内对应的频率上向 局端反馈信号误差为： 从该起始子载波开始按照特定子载波间隔， 在多载波通 信系统通信频带内对应的频率上向局端反馈信号误差。
3、 根据权利要求 1或 2所述的多载波通信系统中信号误差的反馈方法， 其 特征在于， 所述特定子载波间隔由局端设置， 所述确定特定子载波间隔为接收 由局端发送的特定子载波间隔。
4、 根据权利要求 1或 2所述的多载波通信系统中信号误差的反馈方法， 其 特征在于， 所述特定子载波间隔由客户端设置， 该方法还包括：
将所述特定子载波间隔发送给局端。
5、 根据权利要求 4所述的多载波通信系统中信号误差的反馈方法， 其特征 在于， 所述特定子载波间隔和信号误差同时反馈给局端。
6、 根据权利要求 2所述的多载波通信系统中信号误差的反馈方法， 其特征 在于， 当所述特定子载波间隔由客户端设置时， 所述起始子载波的信息、 特定 子载波间隔和信号误差同时反馈给局端。
7、 一种多载波通信系统中信号误差的反馈方法， 其特征在于， 包括： 确定特定子载波间隔， 所述特定子载波间隔大于多载波通信系统中相邻子 载波间隔；
接收客户端反馈的信号； 按照所述特定子载波间隔， 从多载波通信系统通信频带内对应的频率上接 收的信号获取信号误差。
8、 根据权利要求 7所述的多载波通信系统中信号误差的反馈方法， 其特征 在于， 还包括：
接收客户端反馈的起始子载波的信息；
所述按照所述特定子载波间隔， 从多载波通信系统通信频带内对应的频率 上接收的信号获取信号误差为： 从该起始子载波开始按照所述特定子载波间隔， 从多载波通信系统通信频带内对应的频率上接收的信号获取信号误差。
9、 一种应用于多载波通信系统的发送装置， 其特征在于， 包括：
确定单元， 用于确定特定子载波间隔， 所述特定子载波间隔大于多载波通 信系统中相邻子载波间隔；
反馈单元， 用于按照特定子载波间隔， 在多载波通信系统通信频带内对应 的频率上向局端反馈信号误差。
10、 根据权利要求 9 所述的应用于多载波通信系统的发送装置， 其特征在 于， 所述反馈单元还用于向局端反馈起始子载波的信息， 所述反馈单元从该起 始子载波开始按照特定子载波间隔， 在多载波通信系统通信频带内对应的频率 上向局端反馈信号误差。
11、 根据权利要求 9 所述的应用于多载波通信系统的发送装置， 其特征在 于， 所述特定子载波间隔由客户端设置， 所述客户端还包括：
发送单元， 用于将所述特定子载波间隔发送给局端。
12、 根据权利要求 9 所述的应用于多载波通信系统的发送装置， 其特征在 于， 所述特定子载波间隔由局端设置； 所述确定单元通过接收由局端发送的特 定子载波间隔来确定特定子载波间隔。
13、 一种局端， 其特征在于， 包括：
确定单元， 用于确定特定子载波间隔， 所述特定子载波间隔大于多载波通 信系统中相邻子载波间隔； 接收单元， 用于接收客户端反馈的信号；
获取单元， 用于按照所述特定子载波间隔， 从多载波通信系统通信频带内 对应的频率上接收的信号获取信号误差。
14、 根据权利要求 13所述的局端， 其特征在于， 所述接收单元还用于接收 客户端反馈的起始子载波的信息； 所述获取单元从该起始子载波开始按照所述 特定子载波间隔， 从多载波通信系统通信频带内对应的频率上接收的信号获取 信号误差。
15、 一种多载波通信系统， 其特征在于， 所述多载波通信系统包括客户端 和局端；
所述客户端， 用于按照特定子载波间隔， 在多载波通信系统通信频带内对 应的频率上向局端反馈信号误差， 所述特定子载波间隔大于多载波通信系统中 相邻子载波间隔；
所述局端， 用于按照所述特定子载波间隔， 从多载波通信系统通信频带内 对应的频率上接收的信号获取信号误差化权利要求没有新颖性， 即本申请的上 位化权利要求没有任何意义。
PCT/CN2009/073566 2008-09-09 2009-08-27 多载波通信系统中信号误差的反馈方法、设备及系统 WO2010028573A1 (zh)

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102025396B (zh) 2009-09-23 2013-09-11 华为技术有限公司 滤波处理方法、系统及设备
WO2012167439A1 (zh) * 2011-06-10 2012-12-13 华为技术有限公司 用于测量线路的信号发送方法、装置及通信设备
US9485049B2 (en) * 2013-03-29 2016-11-01 Infinera Corporation Adjusting carrier spacing in a channel
CN107295542B (zh) * 2016-03-31 2023-11-03 华为技术有限公司 信息的传输方法、用户设备和网络设备

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1983913A (zh) * 2005-12-17 2007-06-20 华为技术有限公司 一种数据传输方法及系统
CN101026577A (zh) * 2007-01-19 2007-08-29 北京邮电大学 在ofdma系统中保证非实时业务数据包时延稳定性的调度方法
CN101043291A (zh) * 2006-03-20 2007-09-26 华为技术有限公司 正交频分复用系统中的反馈控制方法、装置及收发信机
EP1876785A2 (en) * 2004-02-14 2008-01-09 Samsung Electronics Co., Ltd. Channel state information feedback method for multi-carrier communication system
WO2008009157A1 (en) * 2006-06-20 2008-01-24 Huawei Technologies Co., Ltd. Method for reducing feedback information overhead in precoded mimo-ofdm systems

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3173565B2 (ja) * 1996-06-20 2001-06-04 日本電気株式会社 Ｃｄｍａシステムにおけるアクセス規制装置
US7164764B2 (en) * 2002-11-07 2007-01-16 Solarflare Communications, Inc. Method and apparatus for precode crosstalk mitigation
KR100943624B1 (ko) * 2003-09-15 2010-02-24 삼성전자주식회사 직교 주파수 분할 다중 통신 시스템에서 동적 자원 할당장치 및 방법
KR100566274B1 (ko) * 2003-11-20 2006-03-30 삼성전자주식회사 직교주파수분할다중 시스템에서 부반송파 할당 장치 및방법
KR20060008576A (ko) * 2004-07-21 2006-01-27 삼성전자주식회사 기지 순환접두부호를 이용하여 적응적 변조를 수행하는다중 반송파 전송 시스템 및 방법
EP1909518B1 (en) * 2005-08-22 2013-10-23 Harris Corporation Communication terminal apparatus, base station apparatus and reception quality reporting method
EP1786133B1 (en) * 2005-11-15 2008-10-22 Alcatel Lucent Method for sending channel quality information in a multi-carrier radio communication system, corresponding user terminal and base station
WO2008024967A2 (en) * 2006-08-25 2008-02-28 Conexant Systems, Inc. Systems and methods for mimo precoding in an xdsl system
US7925935B2 (en) * 2007-04-09 2011-04-12 Ikanos Communications, Inc. Back channel communication

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1876785A2 (en) * 2004-02-14 2008-01-09 Samsung Electronics Co., Ltd. Channel state information feedback method for multi-carrier communication system
CN1983913A (zh) * 2005-12-17 2007-06-20 华为技术有限公司 一种数据传输方法及系统
CN101043291A (zh) * 2006-03-20 2007-09-26 华为技术有限公司 正交频分复用系统中的反馈控制方法、装置及收发信机
WO2008009157A1 (en) * 2006-06-20 2008-01-24 Huawei Technologies Co., Ltd. Method for reducing feedback information overhead in precoded mimo-ofdm systems
CN101026577A (zh) * 2007-01-19 2007-08-29 北京邮电大学 在ofdma系统中保证非实时业务数据包时延稳定性的调度方法

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