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1. 发明申请

WO2007016158A3 CODED ANTENNA SWITCHING FOR WIRELESS COMMUNICATIONS AND ASSOCIATED METHODS 审中-公开
标题翻译：无线通信编码天线切换及相关方法
公开(公告)号：WO2007016158A3
公开(公告)日：2009-04-16
申请号：PCT/US2006029031
申请日：2006-07-26
申请人： INTERDIGITAL TECH CORP , LI YINGXUE
发明人： LI YINGXUE
IPC分类号： H04L1/02 , H04B7/02
CPC分类号： H04L1/0618 , H04L25/03184 , H04L25/03292
摘要： A wireless communications device includes an encoder having an input for receiving an input symbol, and generates based upon the input symbol a channel symbol and an antenna control symbol. At least one transmitter is coupled to the encoder for receiving the channel symbol. An antenna switch is coupled to the encoder for receiving the antenna control symbol, and to the at least one transmitter for receiving the channel symbol to be transmitted. An antenna array is coupled to the antenna switch and includes N antenna elements, with N = 2. The antenna switch selects less than N antenna elements based upon the antenna control symbol for transmitting the channel symbol.
摘要翻译：无线通信设备包括具有用于接收输入符号的输入的编码器，并且基于输入符号生成信道符号和天线控制符号。至少一个发射机耦合到编码器以接收信道符号。天线开关耦合到编码器，用于接收天线控制符号，并耦合到至少一个发射机，用于接收待传输的信道符号。天线阵列耦合到天线开关并且包括N = 2的N个天线元件。天线开关基于用于发送信道符号的天线控制符号来选择少于N个天线元件。

2. 发明申请

WO2008021027A3 STATISTICAL FEEDBACK FOR MIMO TRANSMIT BEAMFORMING 审中-公开
标题翻译： MIMO传输波束成形的统计反馈
公开(公告)号：WO2008021027A3
公开(公告)日：2008-06-26
申请号：PCT/US2007017399
申请日：2007-08-03
申请人： INTERDIGITAL TECH CORP , LI YINGXUE , OLESEN ROBERT L
发明人： LI YINGXUE , OLESEN ROBERT L
IPC分类号： H04B7/06
CPC分类号： H04B7/065 , H04B7/0417 , H04B7/0634
摘要： The present invention comprises a method of statistical feedback for Multiple In-Multiple Out (MIMO) transmit beamforming comprising combining a short term channel state information and long term statistics in deriving a precoding matrix. At least one measurable parameter is observed, and a forgetting factor is determined based upon the observed parameter.
摘要翻译：本发明包括一种用于多输入多输出（MIMO）发射波束成形的统计反馈的方法，包括在导出预编码矩阵中组合短期信道状态信息和长期统计。观察到至少一个可测量的参数，并且基于观察到的参数确定遗忘因子。

3. 发明申请

WO2006091620A3 OFDM-MIMO COMMUNICATION SYSTEM USING SMART SPATIAL SYMBOL MAPPING AND ASSOCIATED METHODS 审中-公开
标题翻译：使用智能空间符号映射和相关方法的OFDM-MIMO通信系统
公开(公告)号：WO2006091620A3
公开(公告)日：2007-12-21
申请号：PCT/US2006006165
申请日：2006-02-22
申请人： INTERDIGITAL TECH CORP , LI YINGXUE
发明人： LI YINGXUE
IPC分类号： H04B7/02 , H04J99/00 , H04J11/00
CPC分类号： H04B7/02 , H04L1/0618 , H04L5/0025 , H04L5/0046 , H04L27/2626 , H04L27/2647
摘要： A transmitter in an OFDM-MIMO wireless communication system uses multiple antennas to transmit each data stream. Before the coded binary bits are mapped into channel symbols, they are divided into two groups. One group is mapped to a channel symbol as in a conventional system. Another group of binary bits is used to generate a spatial mapping index. The spatial mapping index determines which antenna is to be used to transmit the channel symbol for each subcarrier. Effectively, information bits are jointly represented by a combination of a channel symbol and an antenna that transmits the channel symbol. Therefore, to achieve the same data rate, a smaller signal constellation is required. In addition, spatial diversity can be achieved which is similar to traditional switching diversity. The number of non-zero subcarriers is reduced by half on average, which results in a lower peak to average ratio than conventional OFDM systems.
摘要翻译： OFDM-MIMO无线通信系统中的发射机使用多个天线来传送每个数据流。在将编码的二进制位映射到通道符号之前，将它们分成两组。一个组被映射到一个通道符号，就像传统的系统一样。另一组二进制位用于生成空间映射索引。空间映射索引确定哪个天线将用于发送每个子载波的信道符号。实际上，信息位由发送信道符号的信道符号和天线的组合共同表示。因此，为了达到相同的数据速率，需要较小的信号星座。此外，可以实现类似于传统交换分集的空间分集。非零子载波的数量平均减少一半，这导致比常规OFDM系统更低的峰均比。

4. 发明申请

WO2008027554A3 METHOD AND APPARATUS FOR QR DECOMPOSITION-BASED MIMO DETECTION AND SOFT BIT GENERATION 审中-公开
标题翻译：用于基于QR分解的MIMO检测和软比特生成的方法和装置
公开(公告)号：WO2008027554A3
公开(公告)日：2008-06-05
申请号：PCT/US2007019204
申请日：2007-08-31
申请人： INTERDIGITAL TECH CORP , LI YINGXUE
发明人： LI YINGXUE
IPC分类号： H04L25/02 , H04L25/03
CPC分类号： H04L25/0242 , H04L25/03216
摘要： A method and apparatus for QR decomposition-based multiple-input multiple-output (MIMO) detection and soft bit generation are disclosed. QR decomposition is performed on the MIMO channel matrix H to compute a Q matrix and an R matrix such that H=QR. The R matrix, or diagonal elements of the R matrix, is stored in a memory. An matrix is computed by dividing elements in each row of the R matrix with a corresponding diagonal element of the R matrix. A vector is computed by dividing each element of the received symbol vector Y with a corresponding diagonal element of the R matrix. A tree search process is performed using the matrix and the vector to generate an approximate maximum likelihood (ML) estimate of transmitted symbols.
摘要翻译：公开了一种用于基于QR分解的多输入多输出（MIMO）检测和软比特生成的方法和装置。对MIMO信道矩阵H执行QR分解以计算Q矩阵和使得H = QR的R矩阵。 R矩阵或R矩阵的对角元素存储在存储器中。通过将R矩阵的每一行中的元素与R矩阵的对应对角元素分开来计算矩阵。通过将接收到的符号向量Y的每个元素与R矩阵的对应对角元素分开来计算向量。使用矩阵和向量来执行树搜索处理，以生成发送符号的近似最大似然（ML）估计。

5. 发明申请

WO2006086576A3 COMMUNICATION SYSTEM MODULATING/DEMODULATING DATA USING ANTENNA PATTERNS AND ASSOCIATED METHODS 审中-公开
标题翻译：通信系统调制/解调数据使用天线模式和相关方法
公开(公告)号：WO2006086576A3
公开(公告)日：2007-11-01
申请号：PCT/US2006004623
申请日：2006-02-09
申请人： INTERDIGITAL TECH CORP , LI YINGXUE
发明人： LI YINGXUE
IPC分类号： H04J99/00 , H04L1/02 , H04L27/06
CPC分类号： H04L1/02 , H04B7/061
摘要： A wireless communication system includes a transmitter comprising a serial-to-parallel converter for converting serial data bits to a parallel bit stream, a signal mapper coupled to the serial-to-parallel converter and an antenna selector coupled to the serial-to-parallel converter. The signal mapper receives as input a first group of bits from the parallel bit stream, and maps the first group of bits to a channel symbol. The antenna selector receives as input a second group of bits from the parallel bit stream. A transmit antenna array is coupled to the antenna selector and to the signal mapper. The transmit antenna array generates a plurality of transmit antenna patterns with one of the transmit antenna patterns being selected for transmitting the channel symbol based upon the second group of bits from the antenna selector.
摘要翻译：无线通信系统包括发射机，包括用于将串行数据比特转换为并行比特流的串行到并行转换器，耦合到串行到并行转换器的信号映射器和耦合到串行到并行转换器的天线选择器转换器。信号映射器从并行位流接收作为输入的第一组位，并将第一组位映射到通道符号。天线选择器从并行比特流接收第二组比特作为输入。发射天线阵列耦合到天线选择器和信号映射器。发射天线阵列产生多个发射天线模式，其中选择一个发射天线模式用于基于来自天线选择器的第二组比特发送信道符号。

6. 发明申请

WO2006034194A3 METHOD FOR OPERATING A SMART ANTENNA IN A WLAN USING MEDIUM ACCESS CONTROL INFORMATION 审中-公开
标题翻译：使用中等访问控制信息在WLAN中操作智能天线的方法
公开(公告)号：WO2006034194A3
公开(公告)日：2006-09-21
申请号：PCT/US2005033485
申请日：2005-09-19
申请人： INTERDIGITAL TECH CORP , CHA INHYOK , LI YINGXUE
发明人： CHA INHYOK , LI YINGXUE
IPC分类号： H04B7/06 , H04B7/08 , H04W16/28 , H04W76/02 , H04W84/12
CPC分类号： H04W16/28 , H04B7/0695 , H04B7/082 , H04W76/02 , H04W84/12
摘要： A communications device with a switched beam antenna operates in a wireless local area network (WLAN) that includes a plurality of transmitters. The switched beam antenna generates a plurality of antenna beams. A method for operating the communications device includes receiving signals from the plurality of transmitters operating within the WLAN, identifying the received signals comprising medium access control (MAC) information, and determining a quality metric for each received signal comprising MAC information (104). A transmitter is selected based on the quality metrics. The antenna beams are scanned for receiving from the selected transmitter the signals comprising MAC information. A quality metric (105) associated with each scanned antenna beam is determined. One of the scanned antenna beams is then selected for communicating with the selected transmitter based on the quality metrics.
摘要翻译：具有切换波束天线的通信设备在包括多个发射机的无线局域网（WLAN）中工作。切换波束天线产生多个天线波束。一种用于操作通信设备的方法包括从在WLAN内工作的多个发射机接收信号，识别包括媒体接入控制（MAC）信息的接收信号，以及确定包括MAC信息的每个接收信号的质量度量（104）。基于质量度量来选择发射机。扫描天线波束以从所选发射机接收包括MAC信息的信号。确定与每个扫描天线波束相关联的质量度量（105）。然后选择扫描天线波束之一用于基于质量度量与所选择的发射机进行通信。

7. 发明申请

WO2007143427A3 METHODS FOR IMPROVING WIRELESS COMMUNICATIONS WHEN INTERFERENCE OR SIGNAL LOSS IS DIRECTIONAL IN NATURE 审中-公开
标题翻译：干扰或信号损失在自然方向上改善无线通信的方法
公开(公告)号：WO2007143427A3
公开(公告)日：2008-04-03
申请号：PCT/US2007069738
申请日：2007-05-25
申请人： INTERDIGITAL TECH CORP , CHA INHYOK , BALDWIN KEITH , LI YINGXUE
发明人： CHA INHYOK , BALDWIN KEITH , LI YINGXUE
IPC分类号： H04W28/04 , H04W84/12 , H04W88/02
CPC分类号： H01Q3/2611 , H04L1/1887 , H04W84/12 , H04W88/02
摘要： A client station in a wireless local area network (WLAN) communication system includes a beam commutation algorithm and a smart antenna responsive to the beam commutation algorithm for selecting one of a plurality of directional antenna beams. The smart antenna is configured as a virtual omni-directional antenna by using a commutation of switched directional antenna beams. A switched directional antenna system that performs a commutation sequencing can be blind to environmental conditions and changes.
摘要翻译：无线局域网（WLAN）通信系统中的客户站包括响应于波束换向算法的波束换向算法和智能天线，用于选择多个定向天线波束中的一个。通过使用切换的定向天线波束的换向将智能天线配置为虚拟全向天线。执行换向排序的开关定向天线系统可能对环境条件和变化无视。

8. 发明申请

WO2006088984A3 METHOD AND APPARATUS FOR SELECTING A BEAM COMBINATION OF MULTIPLE-INPUT MULTIPLE-OUTPUT ANTENNAS 审中-公开
标题翻译：选择多输入多输出天线的波束组合的方法和装置
公开(公告)号：WO2006088984A3
公开(公告)日：2007-10-04
申请号：PCT/US2006005389
申请日：2006-02-16
申请人： INTERDIGITAL TECH CORP , LI YINGXUE , CHA INHYOK , LEE JUNGWOO
发明人： LI YINGXUE , CHA INHYOK , LEE JUNGWOO
IPC分类号： H04B1/02
CPC分类号： H04B7/088 , H01Q3/24 , H04B7/0695 , H04B7/0697 , H04B17/309 , H04B17/318 , H04B17/336 , H04B17/382
摘要： A method and apparatus for selecting a beam combination of multiple-input multiple-output (MIMO) antennas are disclosed. A wireless transmit/receive unit (WTRUs) includes a plurality of antennas to generate a plurality of beams for supporting MIMO. At least one antenna is configured to generate multiple beams, such that various beam combinations can be produced and a desired beam combination selected for conducting wireless communication with another WTRU. A quality metric is measured with respect to each or subset of the possible beam combinations. A desired beam combination for MIMO transmission and reception is selected based on the quality metric measurements.
摘要翻译：公开了一种用于选择多输入多输出（MIMO）天线的波束组合的方法和装置。无线发射/接收单元（WTRU）包括多个天线以产生用于支持MIMO的多个波束。至少一个天线被配置为产生多个波束，使得可以产生各种波束组合，并且选择用于与另一个WTRU进行无线通信的期望波束组合。相对于可能的波束组合的每个或子集来测量质量度量。基于质量度量测量来选择用于MIMO传输和接收的期望的波束组合。

9. 发明申请

WO2007109041A2 METHOD FOR ADAPTIVE QUADRATURE AMPLITUDE MODULATION SIGNAL CONSTELLATION REMAPPING FOR DATA PACKET RETRANSMISSIONS 审中-公开
标题翻译：用于数据分组重传的自适应调制信号调制信号调换方法
公开(公告)号：WO2007109041A2
公开(公告)日：2007-09-27
申请号：PCT/US2007006397
申请日：2007-03-14
申请人： INTERDIGITAL TECH CORP , LI YINGXUE
发明人： LI YINGXUE
IPC分类号： H04L1/18 , H04L1/00 , H04L27/34 , H04L27/36
CPC分类号： H04L27/34 , H04L1/0015 , H04L1/1812 , H04L1/1893 , H04L27/366
摘要： A simplified QAM signal constellation symbol-wise remapping scheme for data packet retransmissions to improve performance at a high coding rate. The simplified QAM signal constellation symbol-wise remapping scheme takes advantage of the separate I and Q labeling bits in a QAM signal to reduce the complexity of a receiving node. A method for adaptive switching between bit-wise and symbol-wise constellation remapping for data packet transmissions according to channel coding rate to achieve optimum performance across the range of channel coding rates.
摘要翻译：用于数据分组重传的简化的QAM信号星座符号重新映射方案，以在高编码率下提高性能。简化的QAM信号星座符号重新映射方案利用QAM信号中的分离的I和Q标记位来降低接收节点的复杂度。一种用于根据信道编码速率的用于数据分组传输的逐位和符号方式星座重映射之间的自适应切换的方法，以在信道编码率的范围内实现最佳性能。

10. 发明申请

WO2009023700A3 METHOD AND APPARATUS FOR CREATING A MULTI-USER MIMO CODEBOOK USING A SINGLE USER MIMO CODEBOOK 审中-公开
标题翻译：用于使用单用户MIMO CODEBOOK创建多用户MIMO码书的方法和装置
公开(公告)号：WO2009023700A3
公开(公告)日：2009-07-09
申请号：PCT/US2008072976
申请日：2008-08-13
申请人： INTERDIGITAL TECH CORP , PAN KYLE JUNG-LIN , BALA ERDEM , LI YINGXUE , GRIECO DONALD M , OLESEN ROBERT L
发明人： PAN KYLE JUNG-LIN , BALA ERDEM , LI YINGXUE , GRIECO DONALD M , OLESEN ROBERT L
IPC分类号： H04B7/04 , H04B7/06
CPC分类号： H04B7/0452 , H04B7/0632 , H04B7/0634 , H04B7/0639 , H04B7/0645 , H04B7/0697
摘要： A wireless communication method and apparatus for creating a codebook in a multiple input/multiple output (MIMO) wireless communication system are disclosed. The method includes adapting a single user codebook, wherein the single user codebook comprises a plurality single user beamforming vectors, into a multi-user codebook, wherein the multi-user codebook comprises a plurality of multi-user beamforming vectors. The method further includes grouping the codebook into a plurality of unitary matrices, selecting a plurality of beamforming vectors from the plurality of unitary matrices, forming a rank specific code-book from the beamforming vectors and the unitary matrices, and selecting a subset of a total number of pairs to form the plurality of unitary matrices.
摘要翻译：公开了一种用于在多输入/多输出（MIMO）无线通信系统中创建码本的无线通信方法和装置。该方法包括使单用户码本将单用户码本包括多个单用户波束形成向量，并将其转换成多用户码本，其中该多用户码本包括多个多用户波束形成向量。该方法还包括将码本分组为多个酉矩阵，从多个单一矩阵中选择多个波束成形向量，从波束形成向量和酉矩阵形成等级特定码本，并选择总数的子集成对数以形成多个单一矩阵。

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