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    Channel state information reconstruction from sparse data
    2.
    发明授权
    Channel state information reconstruction from sparse data 有权
    从稀疏数据重建信道状态信息

    公开(公告)号：US08923110B2

    公开(公告)日：2014-12-30

    申请号：US12555973

    申请日：2009-09-09

    申请人： Jung-Fu Cheng ,  Kambiz Zangi ,  Dennis Hui ,  Leonid Krasny

    发明人： Jung-Fu Cheng ,  Kambiz Zangi ,  Dennis Hui ,  Leonid Krasny

    IPC分类号： H04J11/00 ,  H04B7/02 ,  H04B17/00 ,  H04L1/20 ,  H04L25/02 ,  H04L1/00 ,  H04B7/06

    CPC分类号： H04B17/0047 ,  H04B7/024 ,  H04B7/0626 ,  H04B7/0639 ,  H04B17/336 ,  H04B17/364 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0019 ,  H04L1/0026 ,  H04L1/20 ,  H04L25/0212 ,  H04L25/022 ,  H04L25/0224

    摘要： Accurate downlink channel estimates are calculated based on infrequently transmitted Channel State Information (CSI) feedback data from a UE 20. A plurality of non-uniformly spaced digital CSI feedback samples, representing the frequency response of a downlink communication channel, is received from the UE. The received CSI feedback samples are demodulated and inverse quantized. A time domain tap delay channel model is generated from the inverse quantized CSI feedback samples. The time domain tap delay channel model may be frequency-transformed to obtain a reconstructed frequency response of the downlink communication channel in the frequency domain. Alternatively, channel delays may be estimated based on prior delays and/or known references signals transmitted on the uplink. Channel estimates between CSI reporting instances may be predicted, such as by a sample & hold or a linear predictor. The delays may be presumed fixed, and Kalman filter coefficients evolved over time.

    摘要翻译： 基于来自UE20的不频繁发送的信道状态信息（CSI）反馈数据来计算准确的下行链路信道估计。从UE接收表示下行链路通信信道的频率响应的多个非均匀间隔的数字CSI反馈样本 。 接收的CSI反馈样本被解调和反量化。 时域抽头延迟信道模型是从逆向量化的CSI反馈样本生成的。 时域抽头延迟信道模型可以被频率变换以获得频域中下行链路通信信道的重构频率响应。 或者，可以基于在上行链路上发送的先前的延迟和/或已知的参考信号来估计信道延迟。 可以预测CSI报告实例之间的信道估计，例如通过采样和保持或线性预测器。 可以推测延迟是固定的，并且卡尔曼滤波器系数随时间演化。

    EXPLOITING CHANNEL TIME CORRELATION TO REDUCE CHANNEL STATE INFORMATION FEEDBACK BITRATE
    3.
    发明申请
    EXPLOITING CHANNEL TIME CORRELATION TO REDUCE CHANNEL STATE INFORMATION FEEDBACK BITRATE 有权
    消除通道时间关联以减少通道状态信息反馈双向

    公开(公告)号：US20110280287A1

    公开(公告)日：2011-11-17

    申请号：US12779106

    申请日：2010-05-13

    申请人： Jung-Fu Cheng ,  Dennis Hui ,  Kambiz Zangi ,  Leonid Krasny

    发明人： Jung-Fu Cheng ,  Dennis Hui ,  Kambiz Zangi ,  Leonid Krasny

    IPC分类号： H04B1/38 ,  H04B7/02

    CPC分类号： H04W72/0413 ,  H04L1/0019 ,  H04L1/0028 ,  H04L1/20 ,  H04W72/042

    摘要： The required bitrate for reporting channel state information from a network transceiver to the network is dramatically reduced, while maintaining fidelity of channel estimates, by exploiting prior channel estimates and the time correlation of channel response. For a selected set of sub-carriers, the transceiver estimates channel frequency response from pilot signals. The transceiver also predicts the frequency response for each selected sub-carrier, by multiplying a state vector comprising prior frequency response estimate and a coefficient vector comprising linear predictive coefficients. The predicted frequency response is subtracted from the estimated frequency response, and the prediction error is quantized and transmitted to the network. The network maintains a corresponding state vector and predictive coefficient vector, and also predicts a frequency response for each selected sub-carrier. The received prediction error is inverse quantized and subtracted from the predicted frequency response to yield a frequency response corresponding to that estimated at the transceiver.

    摘要翻译： 通过利用先前的信道估计和信道响应的时间相关性，可以显着降低从网络收发器向网络报告信道状态信息所需的比特率，同时保持信道估计的保真度。 对于所选择的一组子载波，收发器估计来自导频信号的信道频率响应。 收发器还通过将包括先前频率响应估计的状态向量和包括线性预测系数的系数向量相乘来预测每个所选子载波的频率响应。 从估计的频率响应中减去预测的频率响应，并将预测误差量化并发送到网络。 网络维持相应的状态向量和预测系数向量，并且还预测每个选择的子载波的频率响应。 接收的预测误差被反量化，并从预测的频率响应中减去，以产生与在收发机处估计的频率响应相对应的频率响应。

    Generation, deployment and use of tailored channel quality indicator tables
    4.
    发明授权
    Generation, deployment and use of tailored channel quality indicator tables 有权
    定制渠道质量指标表的生成，部署和使用

    公开(公告)号：US07979075B2

    公开(公告)日：2011-07-12

    申请号：US11555294

    申请日：2006-11-01

    申请人： Jung-Fu Cheng ,  Stephen J. Grant ,  Dennis Hui ,  Karl James Molnar

    发明人： Jung-Fu Cheng ,  Stephen J. Grant ,  Dennis Hui ,  Karl James Molnar

    IPC分类号： H04W72/00

    CPC分类号： H04L1/0026 ,  H04L1/0016 ,  H04L1/20 ,  H04W48/08 ,  H04W72/0413 ,  H04W72/085

    摘要： Channel Quality Indicator (CQI) tables are tailored to one or more cells of interest. Tailoring CQI tables to individual cells permits devices such as radio base stations to more reliably and accurately allocate radio resources to those cells since channel conditions vary from cell to cell. According to one embodiment, a table of CQI values is composed by analyzing information indicating channel quality in a cell of interest and generating at least one table of CQI values tailored to the cell of interest based on the information analyzed. The tailored CQI table may be deployed to another device for use in reporting channel quality information. The device may report channel quality by accessing the tailored CQI and identifying the range of CQI values that includes a channel quality estimate derived by the device. The device generates a channel quality information message based on the identified range of CQI values.

    摘要翻译： 信道质量指示符（CQI）表针对感兴趣的一个或多个小区而定制。 由于信道条件因单元而异，所以将CQI表裁定到单个小区允许诸如无线电基站之类的设备更可靠地且准确地分配无线电资源给这些小区。 根据一个实施例，通过分析指示感兴趣的小区中的信道质量的信息并基于分析的信息生成针对感兴趣小区定制的CQI值的至少一个表格来组成CQI值表。 可以将定制的CQI表部署到用于报告信道质量信息的另一设备。 设备可以通过访问定制的CQI并且识别包括由设备导出的信道质量估计的CQI值的范围来报告信道质量。 该设备基于所识别的CQI值范围来生成信道质量信息消息。

    EFFICIENT UPLINK TRANSMISSION OF CHANNEL STATE INFORMATION
    6.
    发明申请
    EFFICIENT UPLINK TRANSMISSION OF CHANNEL STATE INFORMATION 有权
    高效率上行链路传输信道状态信息

    公开(公告)号：US20120188972A1

    公开(公告)日：2012-07-26

    申请号：US13439759

    申请日：2012-04-04

    申请人： Jung-Fu Cheng ,  Kambiz Zangi ,  Dennis Hui ,  Leonid Krasny

    发明人： Jung-Fu Cheng ,  Kambiz Zangi ,  Dennis Hui ,  Leonid Krasny

    IPC分类号： H04W72/04

    CPC分类号： H04B17/0047 ,  H04B7/024 ,  H04B7/0626 ,  H04B7/0639 ,  H04B17/336 ,  H04B17/364 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0019 ,  H04L1/0026 ,  H04L1/20 ,  H04L25/0212 ,  H04L25/022 ,  H04L25/0224

    摘要： A UE in a wireless communication network transmits succinct, direct channel state information to the network, enabling coordinated multipoint calculations such as joint processing, without substantially increasing uplink overhead. The UE receives and processes reference symbols over a set of non-uniformly spaced sub-carriers, selected according to a scheme synchronized to the network. The frequency response for each selected sub-carrier is estimated conventionally, and the results quantized and transmitted to the network on an uplink control channel. The non-uniform sub-carrier selection may be synchronized to the network in a variety of ways.

    摘要翻译： 无线通信网络中的UE向网络发送简洁的直接信道状态信息，实现诸如联合处理之类的协调多点计算，而基本上不增加上行链路开销。 UE根据与网络同步的方案选择的一组非均匀间隔的子载波上接收和处理参考符号。 对于每个选择的子载波的频率响应是常规估计的，并且在上行链路控制信道上量化并传输到网络。 非均匀子载波选择可以以各种方式与网络同步。

    Exploiting channel time correlation to reduce channel state information feedback bitrate
    10.
    发明授权
    Exploiting channel time correlation to reduce channel state information feedback bitrate 有权
    利用信道时间相关来减少信道状态信息反馈比特率

    公开(公告)号：US08406326B2

    公开(公告)日：2013-03-26

    申请号：US12779106

    申请日：2010-05-13

    申请人： Jung-Fu Cheng ,  Dennis Hui ,  Kambiz Zangi ,  Leonid Krasny

    发明人： Jung-Fu Cheng ,  Dennis Hui ,  Kambiz Zangi ,  Leonid Krasny

    IPC分类号： H04K1/10

    CPC分类号： H04W72/0413 ,  H04L1/0019 ,  H04L1/0028 ,  H04L1/20 ,  H04W72/042

    摘要： The required bitrate for reporting channel state information from a network transceiver to the network is dramatically reduced, while maintaining fidelity of channel estimates, by exploiting prior channel estimates and the time correlation of channel response. For a selected set of sub-carriers, the transceiver estimates channel frequency response from pilot signals. The transceiver also predicts the frequency response for each selected sub-carrier, by multiplying a state vector comprising prior frequency response estimate and a coefficient vector comprising linear predictive coefficients. The predicted frequency response is subtracted from the estimated frequency response, and the prediction error is quantized and transmitted to the network. The network maintains a corresponding state vector and predictive coefficient vector, and also predicts a frequency response for each selected sub-carrier. The received prediction error is inverse quantized and subtracted from the predicted frequency response to yield a frequency response corresponding to that estimated at the transceiver.

    摘要翻译： 通过利用先前的信道估计和信道响应的时间相关性，可以显着降低从网络收发器向网络报告信道状态信息所需的比特率，同时保持信道估计的保真度。 对于所选择的一组子载波，收发器估计来自导频信号的信道频率响应。 收发器还通过将包括先前频率响应估计的状态向量和包括线性预测系数的系数向量相乘来预测每个所选子载波的频率响应。 从估计的频率响应中减去预测的频率响应，并将预测误差量化并发送到网络。 网络维持相应的状态向量和预测系数向量，并且还预测每个选择的子载波的频率响应。 接收的预测误差被反量化，并从预测的频率响应中减去，以产生与在收发机处估计的频率响应相对应的频率响应。