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1. 发明申请

WO2006020400A3 METHOD AND SYSTEM FOR LINK ADAPTATION IN AN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING (OFDM) WIRELESS COMMUNICATION SYSTEM 审中-公开
标题翻译：正交频分多路复用（OFDM）无线通信系统中链路自适应的方法和系统
公开(公告)号：WO2006020400A3
公开(公告)日：2006-12-07
申请号：PCT/US2005026670
申请日：2005-07-27
申请人： INTERDIGITAL TECH CORP , KOO CHANG-SOO , ZHANG GUODONG , OLESEN ROBERT LIND , TSAI YINGMING , HUANG YUEJIN
发明人： KOO CHANG-SOO , ZHANG GUODONG , OLESEN ROBERT LIND , TSAI YINGMING , HUANG YUEJIN
IPC分类号： H04J11/00 , H04W52/42
CPC分类号： H04L5/0044 , H04L1/0003 , H04L1/0009 , H04L1/0016 , H04L1/0026 , H04L5/0007 , H04L5/006 , H04W52/42
摘要： 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.
摘要翻译：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。整个子信道被分成多个组。基于每个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。

2. 发明申请

WO2006020741A3 METHOD AND APPARATUS FOR IMPLEMENTING SPACE FREQUENCY BLOCK CODING 审中-公开
标题翻译：实现空间频率编码的方法和装置
公开(公告)号：WO2006020741A3
公开(公告)日：2006-06-01
申请号：PCT/US2005028487
申请日：2005-08-11
申请人： INTERDIGITAL TECH CORP , KWAK JAEYOUNG , OLESEN ROBERT LIND , BULTAN AYKUT , ZEIRA ELDAD , KOO CHANG-SOO , OZLUTURK FATIH , HUANG YUEJIN , PASAD KALPENDU R
发明人： KWAK JAEYOUNG , OLESEN ROBERT LIND , BULTAN AYKUT , ZEIRA ELDAD , KOO CHANG-SOO , OZLUTURK FATIH , HUANG YUEJIN , PASAD KALPENDU R
IPC分类号： H04J99/00 , H04L27/08
CPC分类号： 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 , Y02D50/10
摘要： 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.
摘要翻译：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。

3. 发明申请

WO2006031540A2 METHOD AND SYSTEM FOR OPTIMIZATION OF CHANNEL ESTIMATION AND SYNCHRONIZATION IN AN OFDM-MIMO WIRELESS COMMUNICATION SYSTEM 审中-公开
标题翻译： OFDM-MIMO无线通信系统中信道估计与同步优化的方法与系统
公开(公告)号：WO2006031540A2
公开(公告)日：2006-03-23
申请号：PCT/US2005031784
申请日：2005-09-08
申请人： INTERDIGITAL TECH CORP , HUANG YUEJIN , OLESEN ROBERT LIND , KOO CHANG-SOO
发明人： HUANG YUEJIN , OLESEN ROBERT LIND , KOO CHANG-SOO
IPC分类号： H04K1/10
CPC分类号： H04L27/262 , H04B7/02 , H04B7/0684 , H04L25/0212 , H04L25/0224 , H04L25/0226 , H04L27/261 , H04L27/2614
摘要： The present invention is related to a method and system for optimization of channel estimation and synchronization in an Orthogonal Frequency Division Multiplexing (OFDM) Multiple-Input Multiple-Output (MIMO) wireless communication system. In accordance with the present invention, all of the training sequences are simply constructed based on a basic code by cyclically shifting the basic code. The training sequences are transmitted from different antennas in parallel without performing inverse fast Fourier transform. As a result, there is no peak-to-average ratio problem. Channel estimation is performed in each receiver based on the samples before fast Fourier transform and the maximum-likelihood estimate of channel response in time domain is then mapped into the frequency domain. The channel estimation is not only very simple in implementation, but also very efficient in computation.
摘要翻译：本发明涉及一种用于在正交频分复用（OFDM）多输入多输出（MIMO）无线通信系统中优化信道估计和同步的方法和系统。根据本发明，通过循环移位基本代码，基于基本代码简单地构建所有的训练序列。训练序列并行地从不同的天线发射，而不进行快速傅立叶逆变换。因此，没有峰均比例问题。基于快速傅立叶变换之前的样本在每个接收机中执行信道估计，然后将时域中的信道响应的最大似然估计值映射到频域。信道估计不仅在实现上非常简单，而且在计算上也非常有效。

4. 发明申请

WO2004064298A3 GENERALIZED TWO-STAGE DATA ESTIMATION 审中-公开
标题翻译：一般两阶段数据估计
公开(公告)号：WO2004064298A3
公开(公告)日：2005-03-17
申请号：PCT/US2004000463
申请日：2004-01-08
申请人： INTERDIGITAL TECH CORP , PAN JUNG-LIN , HUANG YUEJIN , GRIECO DONALD M
发明人： PAN JUNG-LIN , HUANG YUEJIN , GRIECO DONALD M
IPC分类号： H04B1/707
CPC分类号： H04B1/71052 , H04B1/71055 , H04B2201/70707 , H04L25/0206 , H04L25/0246
摘要： Symbols are to be recovered from signals received in a shared spectrum. Codes of the signals received in the shared spectrum are processed using a block Fourier transform (FT 34), producing a code block diagonal matrix. A channel response of the received signals is estimated. The channel response is extended and modified (36) to produce a block circulant matrix and a block FT (38) is taken, producing a channel response block diagonal matrix. The code block diagonal matrix is combined (40, 44, 46) with the channel response block diagonal matrix. The received signals are sampled and processed using the combined code block diagonal matrix and the channel response block diagonal matrix with a Cholesky algorithm. A block inverse FT (60) is performed on a result of the Cholesky algorithm to produce spread symbols. The spread symbols are despread to recover symbols of the received signals.
摘要翻译：符号将从在共享频谱中接收的信号中恢复。使用块傅里叶变换（FT 34）处理在共享频谱中接收的信号的码，产生码块对角矩阵。估计接收信号的信道响应。信道响应被扩展和修改（36）以产生块循环矩阵，并且采用块FT（38），产生信道响应块对角矩阵。码块对角矩阵与信道响应块对角矩阵组合（40,44,46）。使用Cholesky算法使用组合码块对角矩阵和信道响应块对角矩阵对接收到的信号进行采样和处理。对Cholesky算法的结果执行块反向FT（60）以产生扩展符号。扩展符号被解扩以恢复接收信号的符号。

5. 发明申请

WO2004023704A3 EXTENDED ALGORITHM DATA ESTIMATOR 审中-公开
标题翻译：扩展算法数据估计器
公开(公告)号：WO2004023704A3
公开(公告)日：2004-09-23
申请号：PCT/US0328163
申请日：2003-09-09
申请人： INTERDIGITAL TECH CORP
发明人： PAN JUNG-LIN , HUANG YUEJIN , ZEIRA ARIELA
IPC分类号： H04B1/707 , H04B7/005 , H04L25/03 , H04B7/216
CPC分类号： H04B1/71052 , H04L25/03159 , H04L2025/03414 , H04L2025/03522 , H04L2025/03605
摘要： A method of data estimation for a Time Division Duplex (TDD) Code Division Multiple Access (CDMA) system or any other system using an extended algorithm (EA) in preference to a truncated algorithm (TA). The EA avoids implementation errors by choice of proper extended matrices, and accepts the use of one piece of hardware. The EA also obviates loss of multiple signals in the tail part of each data field (215), and avoids errors due to transformation of a Toeplitz matrix to a circulant matrix.
摘要翻译：一种用于时分双工（TDD）码分多址（CDMA）系统或使用优先于截断算法（TA）的扩展算法（EA）的任何其他系统的数据估计方法。 EA通过选择适当的扩展矩阵来避免实现错误，并接受使用一块硬件。 EA还消除了每个数据字段（215）的尾部中的多个信号的丢失，并且避免了由于Toeplitz矩阵向循环矩阵的转换而导致的错误。

6. 发明公开

EP1582008A4 GENERALIZED TWO-STAGE DATA ESTIMATION 有权
标题翻译：广义的两阶段的数据估计
公开(公告)号：EP1582008A4
公开(公告)日：2006-03-15
申请号：EP04700894
申请日：2004-01-08
申请人： INTERDIGITAL TECH CORP
发明人： PAN JUNG-LIN , HUANG YUEJIN , GRIECO DONALD M
IPC分类号： H04B1/707
CPC分类号： H04B1/71052 , H04B1/71055 , H04B2201/70707 , H04L25/0206 , H04L25/0246
摘要： Symbols are to be recovered from signals received in a shared spectrum. Codes of the signals received in the shared spectrum are processed using a block Fourier transform (FT 34), producing a code block diagonal matrix. A channel response of the received signals is estimated. The channel response is extended and modified (36) to produce a block circulant matrix and a block FT (38) is taken, producing a channel response block diagonal matrix. The code block diagonal matrix is combined (40, 44, 46) with the channel response block diagonal matrix. The received signals are sampled and processed using the combined code block diagonal matrix and the channel response block diagonal matrix with a Cholesky algorithm. A block inverse FT (60) is performed on a result of the Cholesky algorithm to produce spread symbols. The spread symbols are despread to recover symbols of the received signals.

7. 发明公开

EP1779623A4 METHOD AND APPARATUS FOR IMPLEMENTING SPACE FREQUENCY BLOCK CODING IN AN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING WIRELESS COMMUNICATION SYSTEM 有权
标题翻译：方法和设备空间频率块编码在无线通信系统正交频分复用实现
公开(公告)号：EP1779623A4
公开(公告)日：2007-10-31
申请号：EP05785474
申请日：2005-08-11
申请人： INTERDIGITAL TECH CORP
发明人： KWAK JAEYOUNG , OLESEN ROBERT LIND , BULTAN AYKUT , ZEIRA ELDAD , KOO CHANG-SOO , OZLUTURK FATIH , HUANG YUEJIN , PASAD KALPENDU R
IPC分类号： H04J99/00 , H04L27/08
CPC分类号： 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 , Y02D50/10
摘要： 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.
摘要翻译：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。本发明适用于这两种闭环模式和开环模式。在闭环模式中，功率负载和自波束形成是基于信道状态信息（CSI）进行。一种信道编码后的数据流被多路复用成两个或多个数据流。电力负荷是基于CSI在每个复用数据流的执行。 SFBC编码执行对每个成对的副载波的数据流。然后，自波束形成执行基于CSI分发自束多个发射天线。功率负载可以在两个或更多个SFBC编码数据块或每个本征模式来执行。另外，功率负载可以跨越子载波或子载波组来执行用于弱本征模式。

8. 发明公开

EP1540849A4 EXTENDED ALGORITHM DATA ESTIMATOR 有权
标题翻译：具有扩展算法数据保护
公开(公告)号：EP1540849A4
公开(公告)日：2006-03-22
申请号：EP03752121
申请日：2003-09-09
申请人： INTERDIGITAL TECH CORP
发明人： PAN JUNG-LIN , HUANG YUEJIN , ZEIRA ARIELA
IPC分类号： H04B1/707 , H04B7/005 , H04L25/03 , H04B7/216
CPC分类号： H04B1/71052 , H04L25/03159 , H04L2025/03414 , H04L2025/03522 , H04L2025/03605
摘要： A method of data estimation for a Time Division Duplex (TDD) Code Division Multiple Access (CDMA) system or any other system using an extended algorithm (EA) in preference to a truncated algorithm (TA). The EA avoids implementation errors by choice of proper extended matrices, and accepts the use of one piece of hardware. The EA also obviates loss of multiple signals in the tail part of each data field (215), and avoids errors due to transformation of a Toeplitz matrix to a circulant matrix.

9. 发明公开

EP1779571A4 METHOD AND SYSTEM FOR LINK ADAPTATION IN AN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING (OFDM) WIRELESS COMMUNICATION SYSTEM 审中-公开
标题翻译：方法及系统一个OFDM无线通信系统连接适应
公开(公告)号：EP1779571A4
公开(公告)日：2007-12-19
申请号：EP05781896
申请日：2005-07-27
申请人： INTERDIGITAL TECH CORP
发明人： KOO CHANG-SOO , ZHANG GUODONG , OLESEN ROBERT LIND , TSAI YINGMING , HUANG YUEJIN
IPC分类号： H04J11/00 , H04W52/42
CPC分类号： H04L5/0044 , H04L1/0003 , H04L1/0009 , H04L1/0016 , H04L1/0026 , H04L5/0007 , H04L5/006 , H04W52/42
摘要： 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.

10. 发明专利

CA2771267C METHOD AND APPARATUS FOR IMPLEMENTING SPACE FREQUENCY BLOCK CODING 未知
公开(公告)号：CA2771267C
公开(公告)日：2016-03-15
申请号：CA2771267
申请日：2005-08-11
申请人： INTERDIGITAL TECH CORP
发明人： KWAK JAEYOUNG , OLESEN ROBERT LIND , BULTAN AYKUT , ZEIRA ELDAD , KOO CHANG-SOO , OZLUTURK FATIH , HUANG YUEJIN , PASAD KALPENDU R
IPC分类号： H04J99/00 , H04W24/00 , H04B7/06 , H04J11/00 , H04W88/02 , H04W88/08
摘要： 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.

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