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    SUCCESSIVE INTERFERENCE CANCELLATION FOR MULTI-CODEWORD TRANSMISSIONS
    1.
    发明申请
    SUCCESSIVE INTERFERENCE CANCELLATION FOR MULTI-CODEWORD TRANSMISSIONS 审中-公开
    多码传输的连续干扰消除

    公开(公告)号：WO2008036280A2

    公开(公告)日：2008-03-27

    申请号：PCT/US2007/020238

    申请日：2007-09-18

    Applicant: INTERDIGITAL TECHNOLOGY CORPORATION ,  SHIN, Sung-Hyuk ,  KOO, Chang-Soo

    Inventor： SHIN, Sung-Hyuk ,  KOO, Chang-Soo

    IPC: H04L1/18

    CPC classification number: H04L1/1829 ,  H04B1/71072 ,  H04B7/0417 ,  H04L1/1812

    Abstract: A method of signal processing in a wireless transmit receive unit (WTRU) including multiple input/multiple output (MIMO) functionality. The method includes the WTRU receiving a plurality of simultaneous signals, performing a first process on at least one of the plurality of simultaneous signals, transmitting a feedback signal based on the first process, and performing a second process on at least one of the plurality of simultaneous signals. The first process is a subset of the second process.

    Abstract translation: 包括多输入/多输出（MIMO）功能的无线发射接收单元（WTRU）中的信号处理方法。 该方法包括WTRU接收多个同时信号，对多个同时信号中的至少一个执行第一处理，基于第一处理发送反馈信号，并且对多个同步信号中的至少一个执行第二处理 同步信号。 第一个过程是第二个过程的一个子集。

    METHOD AND APPARATUS FOR SINGULAR VALUE DECOMPOSITION OF A CHANNEL MATRIX
    5.
    发明申请
    METHOD AND APPARATUS FOR SINGULAR VALUE DECOMPOSITION OF A CHANNEL MATRIX 审中-公开
    一种信道矩阵奇异值分解的方法和装置

    公开(公告)号：WO2006107700A2

    公开(公告)日：2006-10-12

    申请号：PCT/US2006/011636

    申请日：2006-03-30

    Applicant: INTERDIGITAL TECHNOLOGY CORPORATION ,  KOO, Chang-Soo ,  OLESEN, Robert, Lind

    Inventor： KOO, Chang-Soo ,  OLESEN, Robert, Lind

    IPC: H04B7/02

    CPC classification number: H04B7/0417 ,  G06F17/16 ,  H04B7/0408 ,  H04B7/0617 ,  H04B7/0634 ,  H04B7/0663 ,  H04L25/0208 ,  H04L25/0248 ,  H04L27/2647

    Abstract: A method and apparatus for decomposing a channel matrix in a wireless communication system are disclosed. A channel matrix H is generated for channels between transmit antennas and receive antennas. A Hermitian matrix A=HHH or A=HHH is created. A Jacobi process is cyclically performed on the matrix A to obtain Q and DA matrixes such that A=QDAQH. DA is a diagonal matrix obtained by singular value decomposition (SVD) on the A matrix. In each Jacobi transformation, real part diagonalization is performed to annihilate real parts of off-diagonal elements of the matrix and imaginary part diagonalization is performed to annihilate imaginary parts of off-diagonal elements of the matrix after the real part diagonalization. U, V and DH matrixes of H matrix are then calculated from the Q and DA matrices. DH is a diagonal matrix comprising singular values of the H matrix.

    Abstract translation: 公开了一种用于在无线通信系统中分解信道矩阵的方法和设备。 为发射天线和接收天线之间的信道生成信道矩阵H. 创建Hermitian矩阵A = HHH或A = HHH。 对矩阵A循环执行Jacobi过程以获得Q和DA矩阵，使得A = QDAQH。 DA是在A矩阵上通过奇异值分解（SVD）获得的对角矩阵。 在每个雅可比变换中，执行实部对角化以消去矩阵的非对角元素的实部，并且虚部对角化​​被执行以消除实部对角化之后的矩阵的非对角元素的虚部。 然后从Q和DA矩阵计算H矩阵的U，V和DH矩阵。 DH是一个包含H矩阵奇异值的对角矩阵。

    DOWNLINK POWER CONTROL WITH LIMIT TO DYNAMIC RANGE USING DETECTION OF DOWNLINK TRANSMIT POWER
    7.
    发明申请
    DOWNLINK POWER CONTROL WITH LIMIT TO DYNAMIC RANGE USING DETECTION OF DOWNLINK TRANSMIT POWER 审中-公开
    使用下行发射功率检测限制动态范围的下行电源控制

    公开(公告)号：WO2005013507A1

    公开(公告)日：2005-02-10

    申请号：PCT/US2004/024458

    申请日：2004-07-27

    Applicant: INTERDIGITAL TECHNOLOGY CORPORATION ,  KOO, Chang-Soo ,  SHIN, Sung-Hyuk

    Inventor： KOO, Chang-Soo ,  SHIN, Sung-Hyuk

    IPC: H04B7/00

    CPC classification number: H04W52/362 ,  H04W52/12 ,  H04W52/143 ,  H04W52/34 ,  H04W52/367

    Abstract: An apparatus and method is provided for dynamic range power control of a wireless downlink communication signal (100), such that target signal quality adjustments are held temporarily (102) when it is apparent that transmit power control commands will not produce the desired response at the transmitting station. Comparisons of measured received signals to thresholds are performed to determine whether the transmitting station has either reached the maximum or minimum transmit power, in which case the target signal quality adjustment is controlled accordingly. When normal transmit power is detected (121), the target signal quality adjustments are allowed to resume as usual.

    Abstract translation: 提供了一种用于无线下行链路通信信号（100）的动态范围功率控制的装置和方法，使得当显然发射功率控制命令将不会在所述无线下行链路通信信号（100）产生期望的响应时暂时保持目标信号质量调整（102） 发射台。 执行测量的接收信号与阈值的比较，以确定发射站是否达到最大或最小发射功率，在这种情况下相应地控制目标信号质量调整。 当检测到正常发射功率（121）时，允许目标信号质量调整恢复正常。

    METHOD AND APPARATUS FOR CHANNEL ESTIMATION IN AN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEM
    8.
    发明申请
    METHOD AND APPARATUS FOR CHANNEL ESTIMATION IN AN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEM 审中-公开
    正交频分复用系统中信道估计的方法与装置

    公开(公告)号：WO2007103183A2

    公开(公告)日：2007-09-13

    申请号：PCT/US2007/005374

    申请日：2007-02-28

    Applicant: INTERDIGITAL TECHNOLOGY CORPORATION ,  KOO, Chang-Soo ,  ZEIRA, Eldad ,  LU, I-Tai ,  OLESEN, Robert, Lind ,  TSAI, KunJu

    Inventor： KOO, Chang-Soo ,  ZEIRA, Eldad ,  LU, I-Tai ,  OLESEN, Robert, Lind ,  TSAI, KunJu

    IPC: H04L25/02

    CPC classification number: H04L25/0216 ,  H04L25/0208 ,  H04L25/0212 ,  H04L25/0214 ,  H04L25/022 ,  H04L25/0232 ,  H04L27/2647

    Abstract: In an orthogonal frequency division multiplexing (OFDM) system, a frequency domain channel estimate for non-nullified subcarriers is converted to a time domain channel estimate. The number of taps L of a channel model is determined based on the time domain channel estimate. An improved time domain channel estimate is obtained by computing L tap coefficients of the channel model from the frequency domain channel estimate. An improved frequency domain channel estimate is obtained by performing a Fourier transform on the improved time domain channel estimate. Alternatively, a time domain truncation method may be performed selectively only if the signal-to-noise ratio (SNR) is below a threshold. Alternatively, a frequency domain channel estimate for pilot subcarriers are converted to a time domain channel estimate and an improved frequency domain channel estimate is obtained based on the number of pilot subcarriers and a delay spread.

    Abstract translation: 在正交频分复用（OFDM）系统中，对于非无效子载波的频域信道估计被转换为时域信道估计。 基于时域信道估计来确定信道模型的抽头数L。 通过从频域信道估计计算信道模型的L抽头系数来获得改进的时域信道估计。 通过对改进的时域信道估计执行傅里叶变换来获得改进的频域信道估计。 或者，只有当信噪比（SNR）低于阈值时，才可以选择性地执行时域截断方法。 或者，将导频子载波的频域信道估计转换为时域信道估计，并且基于导频子载波的数量和延迟扩展获得改进的频域信道估计。

    QUALITY CONTROL SCHEME FOR MULTIPLE-INPUT MULTIPLE-OUTPUT (MIMO) ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING (OFDM) SYSTEMS
    10.
    发明申请
    QUALITY CONTROL SCHEME FOR MULTIPLE-INPUT MULTIPLE-OUTPUT (MIMO) ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING (OFDM) SYSTEMS 审中-公开
    多输入多输出（MIMO）正交频分复用（OFDM）系统的质量控制方案

    公开(公告)号：WO2006020339A2

    公开(公告)日：2006-02-23

    申请号：PCT/US2005/025926

    申请日：2005-07-21

    Applicant: INTERDIGITAL TECHNOLOGY CORPORATION ,  KOO, Chang-Soo ,  OLESEN, Robert, Lind

    Inventor： KOO, Chang-Soo ,  OLESEN, Robert, Lind

    IPC: G01R31/08 ,  G08C15/00 ,  H04L12/26 ,  G06F11/00 ,  H04J3/14 ,  H04J1/16 ,  H04L1/00 ,  H04J11/00

    CPC classification number: H04B7/0417 ,  H04B17/336 ,  H04L1/0002 ,  H04L1/0026 ,  H04L5/0023 ,  H04L5/0046 ,  H04L5/006 ,  H04L5/0064 ,  H04L27/2601 ,  Y02D50/10

    Abstract: A method and apparatus for optimizing the system capacity of an Orthogonal Frequency Division Multiplexing (OFDM) system that uses with Multiple-Input Multiple-Output (MIMO) antennas. In a receiver, a target quality of service (QoS) metric and reference data rate are set. The target QoS metric may be set to a predetermined value and/or may be adjusted dynamically with respect to packet error rate (PER) by a slow outer-loop control processor. The QoS of received signals are measured and compared to the target QoS. Depending on the comparison, the receiver generates a channel quality indicator (CQI) which is sent back to the transmitting transmitter. The CQI is a one or two bit indicator which indicates to the transmitter to disable, adjust or maintain data transmission rates of particular sub-carriers, groups of sub-carriers per transmit antenna, or groups of sub-carriers across all transmit antennas. At the transmitter, the transmitted data rate is disabled, adjusted or maintained. At the receiver, the target QoS metric and reference data rate are adjusted accordingly. This process is repeated for each data frame of each sub-carrier group.

    Abstract translation: 用于优化与多输入多输出（MIMO）天线一起使用的正交频分复用（OFDM）系统的系统容量的方法和设备。 在接收机中，设置目标服务质量（QoS）度量和参考数据速率。 目标QoS度量可以被设置为预定值和/或可以由慢外环控制处理器相对于分组错误率（PER）动态地调整。 测量接收信号的QoS并与目标QoS进行比较。 根据比较，接收机产生发回给发射发射机的信道质量指示符（CQI）。 CQI是一个或两个比特指示符，其向发射机指示禁用，调整或维持特定子载波，每个发射天线的子载波组或者所有发射天线的子载波组的数据传输速率。 在发射器处，传输的数据速率被禁用，调整或维护。 在接收器处，相应地调整目标QoS度量和参考数据速率。 对每个子载波组的每个数据帧重复该过程。

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