公开(公告)号：WO2008073246A3

公开(公告)日：2008-12-04

申请号：PCT/US2007024870

申请日：2007-12-05

Applicant: INTERDIGITAL TECH CORP ,  CHA INHYOK ,  CHITRAPU PRABHAKAR R

Inventor： CHA INHYOK ,  CHITRAPU PRABHAKAR R

IPC: H04L27/26 ,  H04L25/03

CPC classification number: H04W72/0413 ,  H04L1/0041 ,  H04L1/0045 ,  H04L1/0059 ,  H04L5/0007 ,  H04L5/0048 ,  H04W72/0453

Abstract: Techniques of channel correction and demodulation for orthogonal frequency division multiplexing (OFDM) systems are enhanced so that higher effective data rates and/or lower error rates can be achieved with a minimal processing load. Pilots are adaptively moved and/or removed, and their positions are changed, to enhance the channel estimation, decoding, and demodulation processes at the receiver. Reception is also enhanced by adding, removing, or changing the positions, of information-carrying data bits.

Abstract translation: 用于正交频分复用（OFDM）系统的信道校正和解调技术得到了增强，从而以最小的处理负载可以实现更高的有效数据速率和/或更低的差错率。 飞行员被自适应地移动和/或移除，并且他们的位置被改变，以增强接收器处的信道估计，解码和解调过程。 通过添加，删除或更改携带信息的数据位的位置，还可以增强接收功能。

公开(公告)号：WO2008063457A3

公开(公告)日：2008-09-18

申请号：PCT/US2007023726

申请日：2007-11-13

Applicant: INTERDIGITAL TECH CORP ,  GOLDBERG STEVEN J ,  CHA INHYOK ,  CHITRAPU PRABHAKAR R

Inventor： GOLDBERG STEVEN J ,  CHA INHYOK ,  CHITRAPU PRABHAKAR R

IPC: H04L25/02

CPC classification number: H04L25/0236 ,  H04B1/71637 ,  H04L5/0007 ,  H04L5/0048 ,  H04L27/2647

Abstract: The invention enhances channel correction techniques for orthogonal frequency division multiplexing (OFDM) systems so that higher effective data rates can be achieved with a minimal processing load. OFDM channel values determined due to known sequences in one domain can be used to seed solution matrices for channel value determination in other domains. This method can be applied to multiple-input multiple-output (MIMO) systems in order to deal with signal distortion while maintaining a reasonable processor loading profile. In another embodiment, a method to optimize channel partitioning during channel estimation processing in an ultra-wide band (UWB) OFDM wireless communications network includes creating a plurality of windows across a time-frequency channel plane, adaptively sizing the plurality of windows, and merging the plurality of windows.

Abstract translation: 本发明增强了用于正交频分复用（OFDM）系统的信道校正技术，从而以最小的处理负荷实现更高的有效数据速率。 可以使用由于一个域中的已知序列而确定的OFDM信道值来为其他域中的信道值确定而求解解矩阵。 该方法可以应用于多输入多输出（MIMO）系统，以便在维持合理的处理器负载特性的同时处理信号失真。 在另一个实施例中，一种用于在超宽带（UWB）OFDM无线通信网络中的信道估计处理期间优化信道划分的方法包括跨时间 - 频率信道平面创建多个窗口，自适应地调整大小的窗口的大小，以及合并 多个窗口。

公开(公告)号：WO2008073246A2

公开(公告)日：2008-06-19

申请号：PCT/US2007024870

申请日：2007-12-05

Applicant: INTERDIGITAL TECH CORP ,  CHA INHYOK ,  CHITRAPU PRABHAKAR R

Inventor： CHA INHYOK ,  CHITRAPU PRABHAKAR R

IPC: H04L27/26 ,  H04B1/69

CPC classification number: H04W72/0413 ,  H04L1/0041 ,  H04L1/0045 ,  H04L1/0059 ,  H04L5/0007 ,  H04L5/0048 ,  H04W72/0453

Abstract: Techniques of channel correction and demodulation for orthogonal frequency division multiplexing (OFDM) systems are enhanced so that higher effective data rates and/or lower error rates can be achieved with a minimal processing load. Pilots are adaptively moved and/or removed, and their positions are changed, to enhance the channel estimation, decoding, and demodulation processes at the receiver. Reception is also enhanced by adding, removing, or changing the positions, of information-carrying data bits.

Abstract translation: 增强了用于正交频分复用（OFDM）系统的信道校正和解调的技术，使得可以以最小的处理负载来实现更高的有效数据速率和/或更低的错误率。 飞行员被自适应地移动和/或移除，并且它们的位置被改变，以增强在接收机处的信道估计，解码和解调过程。 还通过添加，删除或更改信息携带数据位的位置来增强接收。

公开(公告)号：WO2007124054A3

公开(公告)日：2007-12-27

申请号：PCT/US2007009666

申请日：2007-04-18

Applicant: INTERDIGITAL TECH CORP ,  GUCCIONE LOUIS J ,  CHA INHYOK ,  REZNIK ALEXANDER ,  YE CHUNXUAN ,  RACHA RENUKA

Inventor： GUCCIONE LOUIS J ,  CHA INHYOK ,  REZNIK ALEXANDER ,  YE CHUNXUAN ,  RACHA RENUKA

IPC: H04L9/22 ,  H04K1/00 ,  H04L29/06

CPC classification number: H04L63/061 ,  H04L9/0875 ,  H04L9/0891 ,  H04L63/083 ,  H04L2209/80 ,  H04W12/02 ,  H04W12/04 ,  H04W80/02

Abstract: A wireless transmit/receive unit (WTRU) and a Node B, respectively, perform joint randomness not shared by others (JRNSO) measurement to generate JRNSO bits based on a channel estimate between the WTRU and the Node B. The WTRU and the Node B then perform a reconciliation procedure to generate a common JRNSO bits. The Node B sends the common JRNSO bits to a serving network. The WTRU and the SN secure a session key (such as an integrity key, a cipher key and an anonymity key), using the common JRNSO bits. The JRNSO measurements are performed on an on-going basis, and the session key is updated using a new set of common JRNSO bits. The JRNSO bits may be expanded by using a pseudorandom number generator (PNG) or a windowing technique. A handover may be intentionally induced to increase the JRNSO bits generation rate.

Abstract translation: 基于WTRU和节点B之间的信道估计，无线发射/接收单元（WTRU）和节点B分别执行未被其他人共享的联合随机性（JRNSO）测量以生成未经授权的位.WTRU和节点B 然后执行协调过程以生成一个通用的JRNSO位。 节点B将公共的JRNSO比特发送到服务网络。 WTRU和SN使用公共的JRNSO比特来保护会话密钥（诸如完整性密钥，密码密钥和匿名密钥）。 JRNSO测量是在持续进行的基础上进行的，并且会话密钥使用一组新的常见的未授权的未使用的比特来更新。 可以通过使用伪随机数发生器（PNG）或窗口技术来扩展JRNSO比特。 可以有意识地引导切换来增加JRNSO比特生成速率。

公开(公告)号：WO2005089385A3

公开(公告)日：2007-01-25

申请号：PCT/US2005008772

申请日：2005-03-16

Applicant: INTERDIGITAL TECH CORP

Inventor： CHA INHYOK ,  ZHAO ZHENG ,  GORSUCH THOMAS ERIC ,  LINTELMAN ROSS L

IPC: H04B1/06 ,  H01Q3/22 ,  H04B1/02 ,  H04B1/38 ,  H04B7/02 ,  H04B7/04 ,  H04B7/06 ,  H04B7/08 ,  H04L12/28 ,  H04W16/28 ,  H04W84/12

CPC classification number: H04B7/0408 ,  H04B7/0617 ,  H04B7/0695 ,  H04B7/086 ,  H04W16/28 ,  H04W84/12 ,  Y02D70/14

Abstract: A smart antenna steering algorithm performs a self-monitored re-scan during a sustained use period after having selected a preferred antenna beam. During a sustained use period, a re-scan of the other antenna beams is not performed. The steering algorithm periodically monitors a quality metric of the ongoing radio link provided by the preferred antenna beam. The quality metric is based upon a signal quality metric and a link quality metric. If the quality metric drops below certain thresholds during the sustained use period, the steering algorithm either swaps the preferred antenna beam with an alternate antenna beam or initiates a re-scan of the available antenna beams for selecting a new preferred antenna beam.

Abstract translation: 智能天线导向算法在选择优选的天线波束之后在持续使用期间执行自我监测的重新扫描。 在持续使用期间，不执行其他天线波束的重新扫描。 导向算法周期性地监视由优选天线波束提供的正在进行的无线电链路的质量度量。 质量度量基于信号质量度量和链路质量度量。 如果在持续使用期间质量度量下降到特定阈值以下，则导向算法或者用替代天线波束交换优选的天线波束，或者启动用于选择新的优选天线波束的可用天线波束的重新扫描。

公开(公告)号：WO2005089358A3

公开(公告)日：2007-01-04

申请号：PCT/US2005008683

申请日：2005-03-16

Applicant: INTERDIGITAL TECH CORP

Inventor： CHA INHYOK ,  ZHAO ZHENG ,  GORSUCH THOMAS ERIC ,  LINTELMAN ROSS L

IPC: H04M1/00 ,  H01Q3/02 ,  H04B1/06 ,  H04B7/04 ,  H04B7/06 ,  H04B7/08

CPC classification number: H04B7/0408 ,  H04B7/0617 ,  H04B7/086 ,  Y02D70/14

Abstract: An antenna steering algorithm for a smart antenna uses signal quality metrics and link quality metrics for selecting a preferred antenna beam. The link quality metrics supplement the signal quality metrics for improving the antenna steering decision. The link quality metrics are based on information available from existing counters operating in the media access control (MAC) layer. Separate estimates of the frame error rates in the receive links and in the transmit links are obtained. One estimate is the downlink quality metric (DLQM) and another estimate is the uplink quality metric (ULQM). Alternative link quality metrics are based on throughput and data rates of the exchanged data.

Abstract translation: 用于智能天线的天线导向算法使用信号质量度量和链路质量度量来选择优选的天线波束。 链路质量度量补充信号质量度量以改善天线导向决策。 链路质量度量基于在媒体访问控制（MAC）层中操作的现有计数器可用的信息。 获得接收链路和发送链路中帧错误率的单独估计。 一个估计是下行链路质量度量（DLQM），另一个估计是上行链路质量度量（ULQM）。 替代链路质量度量是基于交换数据的吞吐量和数据速率。

公开(公告)号：EP1867177A4

公开(公告)日：2008-07-02

申请号：EP06740853

申请日：2006-04-07

Applicant: INTERDIGITAL TECH CORP

Inventor： BALDWIN KEITH RICHARD ,  ZEIRA ELDAD ,  CHA INHYOK

IPC: H04Q7/00 ,  H04B1/00 ,  H04B7/04 ,  H04B7/06 ,  H04B7/08

CPC classification number: H04B7/0413 ,  H04B7/0695 ,  H04B7/088

Abstract: A method and apparatus for selecting an antenna mapping in multiple-in/multiple-out (MIMO) enabled wireless communication networks. A candidate set of currently available antenna mappings is determined based upon measured long term channel conditions. An antenna mapping is selected from the candidate set, and the mapping is calibrated with a selected antenna mapping of a receiving wireless transmit/receive unit (WTRU). When the selected mappings are calibrated, packet data transmission begins. In an alternative embodiment, a calibration training frame (CTF) is used to calibrate multiple antenna mappings simultaneously or sequentially. Also disclosed are physical layer and medium access control layer frame formats for implementing antenna mapping selection according to the invention.

公开(公告)号：EP1867054A4

公开(公告)日：2008-04-16

申请号：EP06735173

申请日：2006-02-16

Applicant: INTERDIGITAL TECH CORP

Inventor： LI YINGXUE ,  CHA INHYOK ,  LEE JUNGWOO

IPC: H04B1/02 ,  H04B7/04

CPC classification number: H04B7/088 ,  H01Q3/24 ,  H04B7/0695 ,  H04B7/0697 ,  H04B17/309 ,  H04B17/318 ,  H04B17/336 ,  H04B17/382

Abstract: 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.

公开(公告)号：EP1766722A4

公开(公告)日：2007-07-11

申请号：EP05763185

申请日：2005-06-03

Applicant: INTERDIGITAL TECH CORP

Inventor： CHIANG BING A ,  CHA INHYOK ,  LYNCH MICHAEL J ,  GORSUCH THOMAS E

IPC: H04B7/08 ,  H01Q3/00 ,  H01Q3/24 ,  H01Q3/44 ,  H01Q25/00 ,  H04H1/00 ,  H04H40/90

CPC classification number: H01Q3/24 ,  H01Q3/446 ,  H01Q25/002 ,  H04B7/0808 ,  H04B7/18517 ,  H04H40/90

Abstract: A satellite communication subscriber device includes a smart antenna for generating antenna beams for receiving signals from at least one satellite, and a receiver. The receiver includes a quality metric module for calculating a quality metric on the signals received by each antenna beam. A beam selector is coupled to the smart antenna for selecting the antenna beams. An antenna steering algorithm module runs an antenna steering algorithm for operating the beam selector for scanning the antenna beams, receiving the calculated quality metrics from the receiver for each scanned antenna beam, and comparing the calculated quality metrics. The algorithm selects one of the scanned antenna beams based upon the comparing for continuing to receive signals from the at least one satellite.

Abstract translation: 卫星通信用户设备包括用于生成用于接收来自至少一个卫星的信号的天线波束的智能天线，以及接收机。 接收机包括质量度量模块，用于计算由每个天线波束接收的信号的质量度量。 光束选择器耦合到智能天线以选择天线波束。 天线转向算法模块运行天线转向算法，用于操作用于扫描天线波束的波束选择器，从每个扫描天线波束的接收机接收计算出的质量度量，并比较计算出的质量度量。 该算法基于比较选择扫描的天线射束中的一个以继续接收来自至少一个卫星的信号。

公开(公告)号：EP1787401A4

公开(公告)日：2008-04-16

申请号：EP05794185

申请日：2005-09-07

Applicant: INTERDIGITAL TECH CORP

Inventor： MARINIER PAUL ,  CHANDRA ARTY ,  CHA INHYOK ,  ROY VINCENT

IPC: H04B1/38 ,  H04B7/04 ,  H04B7/06 ,  H04B7/08

CPC classification number: H04W16/28 ,  H04B7/0408 ,  H04B7/0628 ,  H04B7/0695 ,  H04B7/088 ,  H04W8/22 ,  H04W8/245 ,  H04W28/18 ,  H04W48/10 ,  H04W88/08