公开(公告)号：WO2005013536A2

公开(公告)日：2005-02-10

申请号：PCT/US2004/024217

申请日：2004-07-28

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

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

IPC: H04L

CPC classification number: H04W52/12

Abstract: A method for outer loop power control in a wireless communication system begins by determining if a cyclic redundancy check (CRC) is available. If the CRC is available, the method uses the CRC to calculate an adjustment for a target signal to interference ratio (SIR) for a coded composite transport channel (CCTrCH). If the CRC is not available, then quality measurements of the CCTrCH are taken. The quality measurements are used to calculate an adjustment for the target SIR, which is then updated.

Abstract translation: 无线通信系统中的外环功率控制的方法是通过确定循环冗余校验（CRC）是否可用来开始。 如果CRC可用，则该方法使用CRC来计算用于编码复合传输信道（CCTrCH）的目标信号干扰比（SIR）的调整。 如果CRC不可用，则采用CCTrCH的质量测量。 质量测量用于计算目标SIR的调整，然后进行更新。

公开(公告)号：WO2004049589A1

公开(公告)日：2004-06-10

申请号：PCT/US2003/038185

申请日：2003-11-25

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION

Inventor： KOO, Chang-Soo ,  GRANDHI, Sudheer, A. ,  TERRY, Stephen, E.

IPC: H04B7/00

CPC classification number: H04W52/12 ,  H04W52/10 ,  H04W52/143 ,  H04W52/241 ,  H04W52/36 ,  H04W52/362 ,  H04W52/50

Abstract: A method, system, and components for outer loop power control (500) particularly useful for non-real time data services uses data transmitted in many short bursts of short duration, called Temp-DCH allocations (509). A target metric, preferably target SIR (502), is adjusted with differing step up and step down target metric adjustments. The initial target SIR (502) and the transient step size for target SIR adjustment (505-507) is determined in a dynamic way in the outer loop power control for each Temp-DCH allocation (509) of non-real time data.

Abstract translation: 对于非实时数据业务特别有用的用于外环功率控制（500）的方法，系统和组件使用在短持续时间的许多短脉冲串（称为Temp-DCH分配）中发送的数据（509）。 目标度量，优选目标SIR（502），通过不同的升压和降低目标度量调节进行调整。 在非实时数据的每个Temp-DCH分配（509）的外环功率控制中以动态方式确定用于目标SIR调整的初始目标SIR（502）和瞬态步长（505-507）。

公开(公告)号：WO2004025973A1

公开(公告)日：2004-03-25

申请号：PCT/US2003/028412

申请日：2003-09-11

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION

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

IPC: H04Q7/00

CPC classification number: H04W52/12 ,  H04W52/20 ,  H04W52/241 ,  H04W52/362 ,  H04W52/50

Abstract: A wireless communication system and method for controlling transmission power to maintain a received signal-to-interference ratio (SIR) as close as possible to a target SIR. A received quality is maintained as close as possible to a target quality based on block error rate (BLER). When a target BLER is converted to an initial target SIR, an error may occur due to a channel condition mismatch, since the target SIR required for the target BLER varies with channel conditions. An outer loop power control process is used to set a target SIR for each coded composite transport channel (CCTrCH) based on the required target BLER. The process adjusts a SIR step size parameter to maximize the convergence speed of the process.

Abstract translation: 一种无线通信系统和方法，用于控制传输功率以将接收的信号干扰比（SIR）保持为尽可能接近目标SIR。 基于块错误率（BLER），接收到的质量保持尽可能接近目标质量。 当目标BLER被转换为初始目标SIR时，由于目标BLER所需的目标SIR随着信道条件而变化，所以可能由于信道条件不匹配而发生错误。 外环功率控制处理用于基于所需目标BLER设置每个编码复合传输信道（CCTrCH）的目标SIR。 该过程调整SIR步长参数以最大化过程的收敛速度。

公开(公告)号：WO2008024462A3

公开(公告)日：2008-02-28

申请号：PCT/US2007/018727

申请日：2007-08-23

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION ,  EL GAMAL, Hesham ,  BULTAN, Aykut ,  KOO, Chang-Soo

Inventor： EL GAMAL, Hesham ,  BULTAN, Aykut ,  KOO, Chang-Soo

IPC: H04L1/06 ,  H04L1/00

Abstract: The downlink (DL) communication of single channel codewords is supported by providing a multiple-input multiple-output (MIMO) transmitter and receiver. The transmitter includes N T transmit antennas for transmitting spatial streams to a receiver having N R receive antennas, a precoder and a space- time or space-frequency matrix construction unit in communication with the precoder and the transmit antennas. The space-time or space-frequency matrix construction unit constructs a matrix that defines a threaded algebraic space- time (TAST) codeword based on a number of virtual antennas, N V , and the number of transmit antennas, N T . The transmitter operates in an open loop mode when no feedback information from the receiver is available, a semi-open loop mode when channel rank information is available, and a closed loop mode when channel state information (CSI) is available. The receiver is configured to provide feedback to the transmitter on a per received spatial stream basis.

公开(公告)号：WO2007103099A1

公开(公告)日：2007-09-13

申请号：PCT/US2007/005247

申请日：2007-03-02

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION ,  VOLTZ, Peter, J. ,  OLESEN, Robert, L. ,  LU, I-Tai ,  KOO, Chang-Soo ,  DAI, Qingyuan ,  YANG, Yongwen ,  TENG, Hui-Yuan

Inventor： VOLTZ, Peter, J. ,  OLESEN, Robert, L. ,  LU, I-Tai ,  KOO, Chang-Soo ,  DAI, Qingyuan ,  YANG, Yongwen ,  TENG, Hui-Yuan

IPC: H04L27/26

CPC classification number: H04L27/2662 ,  H04L5/0023 ,  H04L25/0244 ,  H04L27/0014 ,  H04L27/266 ,  H04L27/2672

Abstract: In an orthogonal frequency division multiplexed (OFDM) multiple-in multiple-out (MIMO) wireless communication system, a method for correcting sampler clock frequency offset in a receiver comprises acquiring the frequency offset and symbol timing in a received signal by the receiver. The estimated value of a fractional offset is computed, and a correction in the frequency domain based upon the estimated value of the fractional offset is performed.

Abstract translation: 在正交频分多路复用（OFDM）多输入多输出（MIMO）无线通信系统中，用于在接收机中校正采样器时钟频率偏移的方法包括：由接收机获取接收信号中的频率偏移和符号定时。 计算分数偏移的估计值，并且基于分数偏移的估计值执行频域中的校正。

公开(公告)号：WO2007081977A2

公开(公告)日：2007-07-19

申请号：PCT/US2007/000579

申请日：2007-01-10

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION ,  OLESEN, Robert, L. ,  ZEIRA, Eldad, M. ,  VOLTZ, Peter, J. ,  YANG, Yongwen ,  DAI, Qingyuan ,  KOO, Chang-Soo ,  LU, I-Tai ,  TSAI, KunJun

Inventor： OLESEN, Robert, L. ,  ZEIRA, Eldad, M. ,  VOLTZ, Peter, J. ,  YANG, Yongwen ,  DAI, Qingyuan ,  KOO, Chang-Soo ,  LU, I-Tai ,  TSAI, KunJun

IPC: H04L1/00 ,  H04L1/06 ,  H04B7/06

CPC classification number: H04L1/0643 ,  H04B7/0456 ,  H04B7/0619 ,  H04B7/0626 ,  H04B7/0669 ,  H04B7/0697 ,  H04B7/0837 ,  H04B7/0891 ,  H04B17/336 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0606 ,  H04L1/0625 ,  H04L1/0631 ,  H04L27/2626 ,  H04L27/2647 ,  H04W84/12

Abstract: A method and apparatus for implementing spatial processing with unequal modulation and coding schemes (MCSs) or stream-dependent MCSs are disclosed. Input data may be parsed into a plurality of data streams, and spatial processing is performed on the data streams to generate a plurality of spatial streams. An MCS for each data stream is selected independently. The spatial streams are transmitted via multiple transmit antennas. At least one of the techniques of space time block coding (STBC), space frequency block coding (SFBC), quasi-orthogonal Alamouti coding, time reversed space time block coding, linear spatial processing and cyclic delay diversity (CDD) may be performed on the data/spatial streams. An antennal mapping matrix may then be applied to the spatial streams. The spatial streams are transmitted via multiple transmit antennas. The MCS for each data stream may be determined based on a signal-to-noise ratio of each spatial stream associated with the data stream.

Abstract translation: 公开了一种用于实现具有不等调制和编码方案（MCS）或流依赖MCS的空间处理的方法和装置。 输入数据可以被解析成多个数据流，并且对数据流执行空间处理以产生多个空间流。 独立地选择每个数据流的MCS。 空间流通过多个发射天线发射。 可以对空间时间块编码（STBC），空间频率块编码（SFBC），准正交Alamouti编码，时间反转空间时间块编码，线性空间处理和循环延迟分集（CDD）的技术中的至少一种进行 数据/空间流。 然后可以将天线映射矩阵应用于空间流。 空间流通过多个发射天线发射。 可以基于与数据流相关联的每个空间流的信噪比来确定每个数据流的MCS。

公开(公告)号：WO2007030308A3

公开(公告)日：2007-03-15

申请号：PCT/US2006/032643

申请日：2006-08-22

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION ,  DAI, Qingyuan ,  OLESEN, Robert, Lind ,  KOO, Chang-Soo ,  SHAH, Nirav

Inventor： DAI, Qingyuan ,  OLESEN, Robert, Lind ,  KOO, Chang-Soo ,  SHAH, Nirav

IPC: H04L5/12

Abstract: A method and apparatus for de-mapping a symbol modulated by a high order quadrature amplitude modulation (QAM) are disclosed. A transmitting wireless transmit/receive unit (WTRU) maps N input bits to one of 2N symbols in a 2N-QAM constellation. A receiving WTRU receives a signal and generates a sample of the received signal. A soft bit value of the most significant bit (MSB) is calculated based on a value of the sample. A magnitude of the soft bit value of the MSB is subtracted from a threshold. The threshold is initially set with respect to the QAM order, N. A soft bit value of the next MSB is calculated based on the subtraction results. The calculation and subtraction steps are repeated for the next MSB until soft bit values of all the remaining bits are obtained while diving the threshold by 2 each iteration.

公开(公告)号：WO2006020741A2

公开(公告)日：2006-02-23

申请号：PCT/US2005/028487

申请日：2005-08-11

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION ,  KWAK, Jaeyoung ,  OLESEN, Robert, Lind ,  BULTAN, Aykut ,  ZEIRA, Eldad ,  KOO, Chang-Soo ,  OZLUTURK, Fatih ,  HUANG, Yuejin ,  PASAD, Kalpendu, R.

Inventor： KWAK, Jaeyoung ,  OLESEN, Robert, Lind ,  BULTAN, Aykut ,  ZEIRA, Eldad ,  KOO, Chang-Soo ,  OZLUTURK, Fatih ,  HUANG, Yuejin ,  PASAD, Kalpendu, R.

IPC: H04K1/10

CPC classification number: H04L1/0606 ,  H04B7/0417 ,  H04B7/0626 ,  H04B7/0632 ,  H04B7/066 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/006 ,  H04L27/156 ,  H04L27/2626 ,  H04L2027/0046 ,  Y02B70/30 ,  Y02D50/10

Abstract: The present invention is related to a method and apparatus for implementing space frequency block coding (SFBC) in an orthogonal frequency division multiplexing (OFDM) wireless communication system. The present invention is applicable to both a closed loop mode and an open loop mode. In the closed loop mode, power loading and eigen-beamforming are performed based on channel state information (CSI). A channel coded data stream is multiplexed into two or more data streams. Power loading is performed based on the CSI on each of the multiplexed data streams. SFBC encoding is performed on the data streams for each of the paired subcarriers. Then, eigen-beamforming is performed based on the CSI to distribute eigenbeams to multiple transmit antennas. The power loading may be performed on two or more SFBC encoding blocks or on each eigenmodes. Additionally, the power loading may be performed across subcarriers or subcarrier groups for weak eigenmodes.

Abstract translation: 本发明涉及一种用于在正交频分复用（OFDM）无线通信系统中实现空间频率块编码（SFBC）的方法和装置。 本发明适用于闭环模式和开环模式。 在闭环模式中，基于信道状态信息（CSI）执行功率负载和特征波束形成。 信道编码数据流被多路复用为两个或多个数据流。 基于每个复用数据流上的CSI执行功率加载。 对每个配对子载波的数据流执行SFBC编码。 然后，基于CSI执行特征波束形成，以将本征束分布到多个发射天线。 功率加载可以在两个或更多个SFBC编码块上或在每个本征模上执行。 另外，对于弱本征模式，可以跨子载波或子载波组执行功率负载。

公开(公告)号：WO2006020400A2

公开(公告)日：2006-02-23

申请号：PCT/US2005/026670

申请日：2005-07-27

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION ,  KOO, Chang-Soo ,  ZHANG, Guodong ,  OLESEN, Robert, Lind ,  TSAI, Yingming ,  HUANG, Yuejin

Inventor： KOO, Chang-Soo ,  ZHANG, Guodong ,  OLESEN, Robert, Lind ,  TSAI, Yingming ,  HUANG, Yuejin

IPC: H04L1/00

CPC classification number: H04L5/0044 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0016 ,  H04L1/0026 ,  H04L5/0007 ,  H04L5/006 ,  H04W52/42

Abstract: A method and system for link adaptation in an orthogonal frequency division multiplexing (OFDM) wireless communication system are disclosed. The entire sub-channels are divided into a plurality of groups. A channel quality indicator (CQI) is generated for each group based on channel quality status in each group, and communication parameters are adjusted in accordance with the CQI.

Abstract translation: 公开了一种用于正交频分复用（OFDM）无线通信系统中的链路自适应的方法和系统。 整个子通道被分成多个组。 基于每组中的信道质量状态为每个组生成信道质量指示符（CQI），并且根据CQI调整通信参数。

公开(公告)号：WO2005091833A2

公开(公告)日：2005-10-06

申请号：PCT/US2005/004976

申请日：2005-02-17

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION ,  KOO, Chang-Soo ,  DENNEAN, Charles

Inventor： KOO, Chang-Soo ,  DENNEAN, Charles

IPC: H04B7/005 ,  H04W52/36

CPC classification number: H04W52/362

Abstract: A method system and components for outer loop power control which compensates for changing channel conditions. A target metric, preferably target signal-to-interference ratio (SIR), is adjusted with differing step up and step down levels to converge on a relatively low steady state level of step up and step down target metric adjustments. The initial target SIR remains fixed during an inner loop settling state, followed by incremental target SIR adjustments during a transient state, and smaller incremental target SIR adjustments in a steady state. Step sizes of the adjustments are preferably based on the target block error rate (BLER) and the number of errors detected within predetermined time intervals.

Abstract translation: 用于外环功率控制的方法系统和组件，其补偿改变的信道条件。 目标度量，优选目标信号干扰比（SIR），用不同的升压和降压电平进行调整，以收敛于相对较低的升压和降压目标度量调节的稳态电平。 初始目标SIR在内部环路稳定状态期间保持固定，随后在瞬态状态下增加目标SIR调整，并且在稳定状态下更小的增量目标SIR调整。 调整的步长优选地基于目标块错误率（BLER）和在预定时间间隔内检测到的错误数量。