公开(公告)号：US20130044610A1

公开(公告)日：2013-02-21

申请号：US13210395

申请日：2011-08-16

Applicant: Xue-yuan ZHAO ,  Wing Chau CHAN ,  Cheng WANG ,  Henry Hui YE

Inventor： Xue-yuan ZHAO ,  Wing Chau CHAN ,  Cheng WANG ,  Henry Hui YE

IPC: H04W24/00 ,  H04L12/26

CPC classification number: H04B7/0417 ,  H04B7/01 ,  H04B7/0639 ,  H04L25/0204 ,  H04L25/0222 ,  H04L25/0224 ,  H04L27/2647

Abstract: The present invention relates to a method and apparatus for channel temporal correlation estimation and MIMO mode selection. An embodiment of the invention under LTE system utilizes SRS symbols for temporal correlation estimation and performs MIMO mode selection based on the said temporal correlation estimation.

Abstract translation: 本发明涉及用于信道时间相关估计和MIMO模式选择的方法和装置。 LTE系统下的本发明的实施例利用SRS符号进行时间相关估计，并且基于所述时间相关估计执行MIMO模式选择。

公开(公告)号：US20120140851A1

公开(公告)日：2012-06-07

申请号：US13390586

申请日：2009-08-17

Applicant: Xiaobo Zhang ,  Mingli You

Inventor： Xiaobo Zhang ,  Mingli You

IPC: H04L27/00

CPC classification number: H04B7/0456 ,  H04B7/0626 ,  H04B17/24 ,  H04L25/0222

Abstract: In prior art, selection of precoding granularity is affected by two inter-restricting factors, i.e., precoding accuracy and channel estimation at a mobile terminal. To solve this problem, the present invention provides a method of maintaining coherency of a precoding channel in a communication network and an associated apparatus. During precoding, this method takes into account both channel coherency and system capacity. A base station adjusts phase and/or amplitude of a precoding matrix corresponding to each precoded unit to maintain coherency of associated information of the overall precoding channel. The associated information of the precoding channel includes, for example, CSI or eigenvalue matrix of the precoding channel. Afterwards, a mobile terminal performs channel estimation based on reference signals of multiple precoded units, thereby eliminating the limitation in prior art that a mobile terminal can perform channel estimation only within one or more resource block limited by a precoding granularity.

Abstract translation: 在现有技术中，预编码粒度的选择受到两个限制因素的影响，即移动终端的预编码精度和信道估计。 为了解决这个问题，本发明提供一种保持通信网络和相关设备中的预编码信道一致性的方法。 在预编码期间，该方法考虑了信道一致性和系统容量。 基站调整与每个预编码单元相对应的预编码矩阵的相位和/或幅度，以维持整个预编码信道的相关信息的一致性。 预编码信道的相关信息包括例如预编码信道的CSI或特征值矩阵。 之后，移动终端基于多个预编码单元的参考信号进行信道估计，从​​而消除了现有技术中移动终端只能在由预编码粒度限制的一个或多个资源块内执行信道估计的限制。

公开(公告)号：US08145272B2

公开(公告)日：2012-03-27

申请号：US12182238

申请日：2008-07-30

Applicant: Genyuan Wang ,  Hang Jin

Inventor： Genyuan Wang ,  Hang Jin

IPC: H04M1/00

CPC classification number: H04L25/0232 ,  H04L5/0007 ,  H04L5/005 ,  H04L25/0222 ,  H04L25/0226 ,  H04L25/0236

Abstract: Techniques are provided herein to estimate channel information based a received burst that is comprises of consecutive transmissions. Each transmission comprises a plurality of data subcarriers and a plurality of pilot subcarriers on a radio frequency (RF) channel, wherein locations of the pilot subcarriers in the consecutive transmissions are different. Channel information at the pilot subcarriers is computed for each transmission in the burst. A time variation parameter and a frequency variation parameter of the channel for the burst are computed using the channel information at the pilot subcarriers for the transmissions in the burst. Channel information for at least one data subcarrier of a transmission in the burst is computed by interpolation and/or extrapolation of the channel information at the pilot subcarriers using the time variation parameter and the frequency variation parameter. The channel information for the remaining data subcarriers is computed by interpolation and/or extrapolation using the estimated channel information at the pilot subcarriers and the at least one data subcarrier.

Abstract translation: 本文提供技术来基于包括连续传输的接收突发来估计信道信息。 每个传输包括在射频（RF）信道上的多个数据副载波和多个导频子载波，其中连续传输中的导频子载波的位置不同。 针对突发中的每个传输计算导频子载波处的信道信息。 使用在突发中的传输的导频子载波处的信道信息来计算突发的信道的时间变化参数和频率变化参数。 通过使用时间变化参数和频率变化参数在导频子载波处对信道信息进行内插和/或外推来计算突发中的传输的至少一个数据子载波的信道信息。 通过使用在导频子载波和至少一个数据子载波处的估计信道信息的内插和/或外推来计算剩余数据子载波的信道信息。

公开(公告)号：US20120014425A1

公开(公告)日：2012-01-19

申请号：US13047487

申请日：2011-03-14

Applicant: Jiandong ZHUANG ,  Xixian CHEN

Inventor： Jiandong ZHUANG ,  Xixian CHEN

IPC: H04B17/00 ,  H04B15/00 ,  H04W74/02

CPC classification number: H04W4/027 ,  G01S1/78 ,  G01S1/783 ,  G01S5/00 ,  G01S13/589 ,  G01S15/58 ,  G01S15/588 ,  G01S15/8984 ,  G01S2205/001 ,  G01S2205/002 ,  G01S2205/008 ,  H04L1/0015 ,  H04L1/20 ,  H04L25/0204 ,  H04L25/0212 ,  H04L25/022 ,  H04L25/0222 ,  H04L27/2647 ,  H04W4/025 ,  H04W4/029 ,  H04W8/22 ,  H04W24/00 ,  H04W24/10

Abstract: A radio user equipment (UE) mobility status is determined in a communications node. UE mobility status measurements associated with the UE communicating over a radio channel are performed. The UE mobility status corresponds to a degree of variation of the radio channel over time. Channel characteristics of the radio channel at a first time and at a second later time are determined. Based on the determined channel characteristics, a channel characteristic error metric is determined and compared to a predetermined threshold. The UE mobility status is determined based on one or more iterations of the threshold comparison.

Abstract translation: 在通信节点中确定无线用户设备（UE）移动性状态。 执行与UE在无线电信道上通信相关联的UE移动性状态测量。 UE移动性状态对应于无线电信道随时间的变化程度。 确定无线电频道在第一时间和稍后时间的频道特性。 基于确定的信道特性，确定信道特征误差度量并将其与预定阈值进行比较。 基于阈值比较的一个或多个迭代来确定UE移动性状态。

公开(公告)号：US08077782B2

公开(公告)日：2011-12-13

申请号：US11794888

申请日：2006-01-05

Applicant: Takashi Onodera ,  Toshizo Nogami ,  Hidekazu Tsuboi

Inventor： Takashi Onodera ,  Toshizo Nogami ,  Hidekazu Tsuboi

IPC: H04K1/10 ,  H04L27/28

CPC classification number: H04L25/022 ,  H04L5/0007 ,  H04L5/0064 ,  H04L25/0222 ,  H04L27/0008

Abstract: [Object] To prevent communication performance capabilities from deteriorating even in the cases that the estimation error of the propagation path is significant, and that the variation speed of the propagation path characteristics is fast.[Overcoming Means] An adaptive modulation control apparatus which adaptively selects a modulation parameter from among a plurality of modulation parameters corresponding to an estimation result of a propagation path state and which has a frequency axis gradient calculating section (11) which receives propagation path estimation information indicative of an estimation result of a propagation path state, and calculates a gradient of a function of frequency corresponding to each frequency when the propagation path estimation information is set to be the function of frequency, a correcting section (12) that makes a correction to increase or decrease an upper limit or a lower limit of a numerical range of the propagation path state in one-to-one correspondence with each of the modulation parameters corresponding to the calculated gradient of the function of frequency, and a modulation parameter selecting section (13) that selects a modulation parameter corresponding to the corrected numerical range of the propagation path state including the propagation path estimation information.

Abstract translation: 即使在传播路径的估计误差大的情况下，传播路径特性的变动速度快的情况下，也能防止通信性能下降。 [克服装置]一种自适应调制控制装置，其自适应地从对应于传播路径状态的估计结果的多个调制参数中选择调制参数，并且具有频率轴梯度计算部分（11），其接收传播路径估计信息 指示传播路径状态的估计结果，并且当传播路径估计信息被设置为频率的函数时，计算对应于每个频率的频率的函数的梯度;校正部分（12），其对 与传播路径状态的数值范围的上限或下限一一对应地对应于与计算的频率函数的梯度相对应的调制参数，调制参数选择部（ 13），其选择对应于校正数字的调制参数 包括传播路径估计信息的传播路径状态的范围。

公开(公告)号：US20110299480A1

公开(公告)日：2011-12-08

申请号：US12958959

申请日：2010-12-02

Applicant: Gregory A. Breit ,  Santosh Paul Abraham ,  Sameer Vermani ,  Hemanth Sampath ,  Vincent Knowles Jones

Inventor： Gregory A. Breit ,  Santosh Paul Abraham ,  Sameer Vermani ,  Hemanth Sampath ,  Vincent Knowles Jones

IPC: H04W72/04 ,  H04W84/02

CPC classification number: H04L25/03343 ,  H04B7/0626 ,  H04B7/0658 ,  H04L1/0026 ,  H04L1/0029 ,  H04L1/003 ,  H04L5/0048 ,  H04L25/0204 ,  H04L25/0222 ,  H04L25/0228 ,  H04L2025/03426 ,  H04L2025/03777

Abstract: Certain aspects of the present disclosure relate to techniques for achieving adaptive channel state information (CSI) feedback rate in multi-user communication systems. A rate by which CSI feedback can be transmitted from each user station of a wireless system to a serving access point may be adjusted based on evolution of a channel between that user station and the access point.

Abstract translation: 本公开的某些方面涉及用于在多用户通信系统中实现自适应信道状态信息（CSI）反馈速率的技术。 基于无线系统的每个用户站向服务接入点发送CSI反馈的速率可以基于该用户站与接入点之间的信道的演进来调整。

公开(公告)号：US20110255415A1

公开(公告)日：2011-10-20

申请号：US13141219

申请日：2010-01-22

Applicant: Hideo Sawazaki ,  Masao Oki

Inventor： Hideo Sawazaki ,  Masao Oki

IPC: H04L12/26

CPC classification number: H04L43/0894 ,  H04L1/1816 ,  H04L5/0046 ,  H04L25/0222 ,  H04L25/14 ,  H04W28/18 ,  H04W72/0453

Abstract: In a vehicle-side transmitting apparatus that applies a multi-link system employing a logical plurality of communication lines and includes a transmitting unit that transmits transmission data that should be transmitted to a receiving apparatus of a communication partner, the transmitting unit monitors changes in transmission rates of communication lines A to C, calculates, based on rated transmission rates, information concerning changes in the communication lines A to C, and a transmission time until data that should be transmitted to a ground-side receiving apparatus is completed to be transmitted to the ground-side receiving apparatus, fluctuating transmission rates of the communication lines A to C, and determines, based on the calculated transmission rates, allocation amounts to the communication lines of data that should be transmitted this time.

Abstract translation: 在应用采用逻辑多条通信线路的多链路系统的车辆侧发送装置中，包括发送单元，该发送单元发送应发送到通信对方的接收装置的发送数据，发送单元监视发送的变化 通信线路A至C的速率基于额定传输速率计算关于通信线路A至C的变化的信息，并且直到发送到接地侧接收设备的数据的传输时间完成为传送到 接地侧接收装置，通信线路A至C的波动的传输速率，并且基于所计算的传输速率，确定此次应发送的数据的通信线路的分配量。

公开(公告)号：US20110235688A1

公开(公告)日：2011-09-29

申请号：US13046290

申请日：2011-03-11

Applicant: Masataka UMEDA

Inventor： Masataka UMEDA

IPC: H04L27/28

CPC classification number: H04L25/0216 ,  H04L5/0007 ,  H04L5/0048 ,  H04L25/022 ,  H04L25/0222 ,  H04L25/0232 ,  H04L27/265 ,  H04L27/2662

Abstract: A receiving device includes: a receiver that receives frequency multiplex signal; a first Fourier transformation unit that transforms the received frequency multiplex signal to frequency domain signal; a first time-domain waveform generator that generates a first time-domain waveform by performing inverse Fourier transformation of a plurality of pilot signals which are inserted into the frequency multiplex signal; a second time-domain waveform generator that generates a second time-domain waveform having an aliasing period on the basis of the received frequency multiplex signal; a second Fourier transformation unit that synthesizes the first time-domain waveform to the second time-domain waveform and transforms the synthesized time-domain waveform to frequency-domain information; and a propagation-path compensation unit that compensates a propagation-path of the frequency multiplex signal which is output from the first Fourier transformation unit in accordance with information transformed by the second Fourier transformation unit.

Abstract translation: 接收装置包括：接收频率复用信号的接收机; 第一傅立叶变换单元，将接收到的频率复用信号变换为频域信号; 第一时域波形发生器，其通过对插入到所述频率复用信号中的多个导频信号进行逆傅里叶变换来生成第一时域波形; 第二时域波形发生器，其基于接收到的频率复用信号生成具有混叠周期的第二时域波形; 第二傅立叶变换单元，将第一时域波形合成到第二时域波形，并将合成的时域波形变换为频域信息; 以及传播路径补偿单元，其根据由第二傅立叶变换单元变换的信息来补偿从第一傅里叶变换单元输出的频率复用信号的传播路径。

公开(公告)号：US20110222472A1

公开(公告)日：2011-09-15

申请号：US12883909

申请日：2010-09-16

Applicant: Gregory A. Breit ,  Santosh Paul Abraham ,  Sameer Vermani ,  Hemanth Sampath ,  Simone Merlin ,  Didier Johannes Richard Van Nee

Inventor： Gregory A. Breit ,  Santosh Paul Abraham ,  Sameer Vermani ,  Hemanth Sampath ,  Simone Merlin ,  Didier Johannes Richard Van Nee

IPC: H04W4/00

CPC classification number: H04L25/03343 ,  H04B7/0626 ,  H04B17/24 ,  H04L1/0026 ,  H04L1/0027 ,  H04L1/0033 ,  H04L5/0048 ,  H04L25/0204 ,  H04L25/0222 ,  H04L25/0228 ,  H04L2025/03426 ,  H04L2025/03802

Abstract: Methods and apparatuses are proposed for supporting one or more user-dependent channel state information (CSI) feedback rates in a downlink spatial division multiple access (SDMA) system. For certain aspects, an access point (AP) may receive a channel evolution feedback from one or more stations and send a request for CSI to the stations whose CSI values need to be updated. For certain aspects, the AP may poll the stations for updated CSI values. For certain aspects, deterministic back-off timers may be assigned to the stations indicating when to send their CSI feedback. The proposed methods may improve system performance.

公开(公告)号：US20110110460A1

公开(公告)日：2011-05-12

申请号：US13006329

申请日：2011-01-13

Applicant: Takashi ONODERA

Inventor： Takashi ONODERA

IPC: H04L27/00

CPC classification number: H04L27/2627 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0016 ,  H04L1/0025 ,  H04L25/0222 ,  H04L27/2602 ,  H04L27/2646 ,  Y02D50/10

Abstract: An object of the present invention is to improve the throughput and reduce the circuit size and power consumption for transmission.A wireless communication device that performs wireless communication in a multi-carrier transmission system using a frame composed of a plurality of sub-frames, which includes: an extraction part (8) extracting a modulation parameter from a modulation information sub-frame for constituting a received frame and notifying a receiving side of the modulation parameter of each sub-carrier; a storage part (9) storing the extracted modulation parameter; and a modulation control part (10) performing at least one of coding of transmission data and modulation of each sub-carrier using a stored modulation parameter when transmitting a frame to a transmission source of a frame, and which transmits a frame containing no modulation information sub-frame to the transmission source of the frame.