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    MIMO TRANSMITTER AND RECEIVER FOR SUPPORTING DOWNLINK COMMUNICATION OF SINGLE CHANNEL CODEWORDS
    1.
    发明申请
    MIMO TRANSMITTER AND RECEIVER FOR SUPPORTING DOWNLINK COMMUNICATION OF SINGLE CHANNEL CODEWORDS 审中-公开

    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.

    METHOD AND APPARATUS FOR SUBCARRIER AND ANTENNA SELECTION IN MIMO-OFDM SYSTEM
    3.
    发明申请
    METHOD AND APPARATUS FOR SUBCARRIER AND ANTENNA SELECTION IN MIMO-OFDM SYSTEM 审中-公开
    MIMO-OFDM系统中SUBCARRIER和天线选择的方法与装置

    公开(公告)号：WO2006020434A2

    公开(公告)日：2006-02-23

    申请号：PCT/US2005/027061

    申请日：2005-07-29

    Applicant: INTERDIGITAL TECHNOLOGY CORPORATION ,  OZLUTURK, Fatih ,  PIETRASKI, Philip, J. ,  BULTAN, Aykut

    Inventor： OZLUTURK, Fatih ,  PIETRASKI, Philip, J. ,  BULTAN, Aykut

    IPC: H04L1/02

    CPC classification number: H04W52/262 ,  H04B7/046 ,  H04L1/0003 ,  H04L1/0009 ,  H04L5/0023 ,  H04L5/0025 ,  H04L5/0046 ,  H04L5/006 ,  H04L25/0206 ,  H04W52/42

    Abstract: A method and apparatus for radio resources control in a multiple input multiple output (MIMO) orthogonal frequency division multiplexing (OFDM) communication system are disclosed. Channel metric is calculated for each of a plurality of transmit antennas. Sub-carriers are allocated to each transmit antenna in accordance with the channel metric of each transmit antenna. Signals are transmitted using the allocated sub-carriers at each antenna. Adaptive modulation and coding and transmit power control of each sub-carrier may be further implemented in accordance with the channel metric. Power control may be implemented per antenna basis or per sub-carrier basis. In performing power control, a subset of transmit antennas may be selected and waterpouring may be applied only to the selected antennas. Waterpouring may be based on SNR instead of channel response.

    Abstract translation: 公开了一种用于多输入多输出（MIMO）正交频分复用（OFDM）通信系统中的无线资源控制的方法和装置。 为多个发射天线中的每一个计算信道度量。 根据每个发射天线的信道度量，将子载波分配给每个发射天线。 在每个天线处使用分配的子载波来发送信号。 可以根据信道度量进一步实现每个子载波的自适应调制和编码和发射功率控制。 功率控制可以基于每个天线或每个子载波来实现。 在执行功率控制时，可以选择发射天线的子集，并且可以仅对所选择的天线进行浇水。 灌水可以基于SNR而不是通道响应。

    METHOD AND APPARATUS FOR CHANNEL ESTIMATION USING TIME-FREQUENCY LOCALIZED PILOTS AND DE-NOISING TECHNIQUES
    4.
    发明申请
    METHOD AND APPARATUS FOR CHANNEL ESTIMATION USING TIME-FREQUENCY LOCALIZED PILOTS AND DE-NOISING TECHNIQUES 审中-公开
    使用时频定位飞行员和消除噪声技术的信道估计方法与装置

    公开(公告)号：WO2007109064A1

    公开(公告)日：2007-09-27

    申请号：PCT/US2007/006463

    申请日：2007-03-15

    Applicant: INTERDIGITAL TECHNOLOGY CORPORATION ,  HOSSEINIAN, Seyed, M. ,  BULTAN, Aykut

    Inventor： HOSSEINIAN, Seyed, M. ,  BULTAN, Aykut

    IPC: H04L25/02

    CPC classification number: H04L25/0228 ,  H04L5/0048 ,  H04L25/0234 ,  H04L27/2647

    Abstract: A method and apparatus for performing channel estimation using time-frequency localized pilots and de-noising techniques are disclosed. A transmitter sends pilot symbols which are localized in a joint time-frequency domain to a receiver for channel estimation. The receiver receives the pilot symbols and performs a time-frequency analysis, such as a discrete Gabor transform (DGT), to transform the received pilot symbols to a joint time-frequency domain. The receiver applies a de-noising technique, such as masking, to separate the pilot symbols from the embedded noise in the joint time-frequency domain. The receiver performs a time-frequency synthesis, such as an inverse discrete Gabor transform (IDGT), to generate a noise-removed pilot symbols in a time domain. The noise left after de-noising is only that part that overlaps with the pilot symbols in the joint time-frequency domain. The receiver then performs channel estimation with the noise-removed pilot symbols.

    Abstract translation: 公开了一种使用时频局域化导频和去噪技术进行信道估计的方法和装置。 发射机将发送在联合时频域中的导频符号发送到接收机进行信道估计。 接收机接收导频符号并执行诸如离散Gabor变换（DGT）的时间 - 频率分析，以将接收到的导频符号变换为联合时频域。 接收机应用去噪技术，例如掩蔽，以将导频符号与联合时频域中的嵌入噪声分离。 接收机执行诸如逆离散Gabor变换（IDGT）的时间 - 频率合成，以在时域中产生噪声去除的导频符号。 去噪后留下的噪声只是与联合时频域中的导频符号重叠的部分。 然后，接收机利用噪声消除的导频符号进行信道估计。

    METHOD AND APPARATUS FOR AUTOMATICALLY CORRECTING RECEIVER OSCILLATOR FREQUENCY
    5.
    发明申请
    METHOD AND APPARATUS FOR AUTOMATICALLY CORRECTING RECEIVER OSCILLATOR FREQUENCY 审中-公开
    用于自动校正接收器振荡器频率的方法和装置

    公开(公告)号：WO2007015788A2

    公开(公告)日：2007-02-08

    申请号：PCT/US2006/027585

    申请日：2006-07-17

    Applicant: INTERDIGITAL TECHNOLOGY CORPORATION ,  BULTAN, Aykut ,  PAN, Jung-Lin ,  YANG, Rui ,  KEARNEY, Kenneth, P.

    Inventor： BULTAN, Aykut ,  PAN, Jung-Lin ,  YANG, Rui ,  KEARNEY, Kenneth, P.

    IPC: H04B3/46

    CPC classification number: H03J7/04

    Abstract: A method and apparatus for automatically correcting the frequency of a local oscillator of a receiver. A primary common pilot channel (CPICH) code sequence is generated by a CPICH code generator based on a reference cell identification signal and a frame start signal. The received despread CPICH code sequence is used to generate an estimated frequency error signal. A control voltage generator based on the estimated frequency error signal generates a control voltage signal. The CPICH code generator generates the CPICH code sequence based on signals received from a high speed downlink packet access (HSDPA) serving cell when HSDPA is active, or a timing reference cell when HSDPA is not active. The present invention achieves full maximum ratio combining gain when space-time transmit diversity (STTD) is used, even without receiving a transmit diversity indication.

    Abstract translation: 一种用于自动校正接收机的本地振荡器的频率的方法和装置。 基于参考小区识别信号和帧起始信号，由CPICH码发生器生成主公共导频信道（CPICH）码序列。 接收的解扩CPICH码序列用于产生估计的频率误差信号。 基于估计频率误差信号的控制电压发生器产生控制电压信号。 当HSDPA处于活动状态时，CPICH码发生器基于从高速下行链路分组接入（HSDPA）服务小区接收的信号，或者当HSDPA不活动时，定时参考小区，生成CPICH码序列。 即使没有接收到发射分集指示，本发明在使用空时传输分集（STTD）时实现了全最大比组合增益。

    CODE TRACKING LOOP WITH AUTOMATIC POWER NORMALIZATION
    6.
    发明申请
    CODE TRACKING LOOP WITH AUTOMATIC POWER NORMALIZATION 审中-公开
    具有自动电源正常化的代码跟踪环路

    公开(公告)号：WO2003030389A1

    公开(公告)日：2003-04-10

    申请号：PCT/US2002/011504

    申请日：2002-04-15

    Applicant: INTERDIGITAL TECHNOLOGY CORPORATION

    Inventor： BULTAN, Aykut ,  GRIECO, Donald

    IPC: H04B1/707

    CPC classification number: H04B1/7085 ,  H04B1/709 ,  H04L7/0029

    Abstract: The UE is in communication with one of the plurality of base stations and receives a communication signal from the base station through the CDMA receiver. The communication signal is correlated by said receiver using a delay locked code tracking loop (10), that estimates and tracks a channel delay of the communication signal. The tracking loop comprises a reference code generator (16) for generating a reference code signal and an interpolator (11) for generating timed signal versions in response to the receipt of said communication. A timed signal correlator (12a, 12b, 13a; 13b), also included in the tracking loop for correlating at least two of the timed signal versions with the code reference signal. The result of the correlation is used for generating an error signal. An automatic power normalization loop (APN), that is responsive to the interpolator (11), generates a power error signal that normalizes the error signal through a normalization circuit (14).

    Abstract translation: UE与多个基站之一进行通信，并通过CDMA接收机从基站接收通信信号。 通信信号由所述接收机使用延迟锁定码跟踪环路（10）相关，延迟锁定码跟踪环路（10）估计和跟踪通信信号的信道延迟。 跟踪环包括用于产生参考码信号的参考码发生器（16）和用于响应于所述通信的接收而产生定时信号版本的内插器（11）。 定时信号相关器（12a，12b，13a; 13b）也包括在用于使至少两个定时信号版本与代码参考信号相关的跟踪环路中。 相关的结果用于产生误差信号。 响应于内插器（11）的自动功率归一化回路（APN）产生通过归一化电路（14）对误差信号进行归一化的功率误差信号。

    PRECISE SLEEP TIMER USING A LOW-COST AND LOW-ACCURACY CLOCK
    7.
    发明申请
    PRECISE SLEEP TIMER USING A LOW-COST AND LOW-ACCURACY CLOCK 审中-公开
    精密休眠定时器使用低成本和低精度时钟

    公开(公告)号：WO2005062855A2

    公开(公告)日：2005-07-14

    申请号：PCT/US2004/042951

    申请日：2004-12-22

    Applicant: INTERDIGITAL TECHNOLOGY CORPORATION ,  BULTAN, Aykut ,  HAIM, John, W. ,  KAZAKEVICH, Leonid

    Inventor： BULTAN, Aykut ,  HAIM, John, W. ,  KAZAKEVICH, Leonid

    IPC: H04B1/16 ,  H04B7/005 ,  H04B7/01 ,  H04B7/015 ,  H04W52/28

    CPC classification number: H04W52/288 ,  H04W52/0216 ,  H04W52/0248 ,  H04W52/0293 ,  Y02D70/1242 ,  Y02D70/24

    Abstract: A wireless transmit/receive unit (WTRU) uses an oscillator providing accuracy for synchronized communications parameters in an active mode, and operates at reduced power during a discontinuous reception (DRX) mode. A real time clock (RTC) is used as the frequency standard during the reduced power operation, and a frequency adjustment is effected while the RTC is used as the frequency standard. By effecting the frequency adjustment, the RTC is able to be used as the frequency standard for substantial time periods, thereby reducing power consumption of the WTRU during the DRX mode.

    Abstract translation: 无线发射/接收单元（WTRU）使用振荡器提供在活动模式下的同步通信参数的精度，并且在不连续接收（DRX）模式期间以降低的功率工作。 在降低功率运行期间，使用实时时钟（RTC）作为频率标准，并且在使用RTC作为频率标准时进行频率调整。 通过进行频率调整，RTC能够用作相当长的时间段的频率标准，从而在DRX模式期间降低了WTRU的功耗。

    METHOD AND APPARATUS FOR UPLINK SYNCHRONIZATION IN WIRELESS COMMUNICATIONS
    8.
    发明申请
    METHOD AND APPARATUS FOR UPLINK SYNCHRONIZATION IN WIRELESS COMMUNICATIONS 审中-公开
    在无线通信中上行同步的方法和装置

    公开(公告)号：WO2005048506A2

    公开(公告)日：2005-05-26

    申请号：PCT/US2004/036564

    申请日：2004-11-03

    Applicant: INTERDIGITAL TECHNOLOGY CORPORATION ,  BULTAN, Aykut ,  GRIECO, Donald, M. ,  DENNEAN, Charles ,  PAN, Jung-Lin

    Inventor： BULTAN, Aykut ,  GRIECO, Donald, M. ,  DENNEAN, Charles ,  PAN, Jung-Lin

    IPC: H04L

    CPC classification number: H04W56/0005 ,  H04B1/70757 ,  H04B7/2668 ,  H04B2201/70701

    Abstract: A method and system for uplink (UL) synchronization of an uplink transmission from a plurality of wireless transmit/receive units (WTRUs) to a Node-B in a code division multiple access (CDMA) system. A Node-B receives a transmission including a UL synchronization (SYNC_UL) sequence from a WTRU. A sampler samples the transmission at a sampling rate which is higher than a chip rate. The samples are down-sampled and the SYNC_UL sequence is detected at a lower rate. A first significant path location of the detected SYNC_UL sequence is determined, and based on the first significant path location, a final significant path location is determined. The final significant path location is quantized and UpPCHPOS is transmitted to the WTRU to adjust a UL transmission timing.

    Abstract translation: 用于在码分多址（CDMA）系统中从多个无线发射/接收单元（WTRU）到节点B的上行链路传输的上行链路（UL）同步的方法和系统。 节点B从WTRU接收包括UL同步（SYNC_UL）序列的传输。 采样器以高于码片速率的采样率对传输进行采样。 采样被降采样，SYNC_UL序列以较低的速率被检测到。 确定检测到的SYNC_UL序列的第一重要路径位置，并基于第一重要路径位置确定最终重要路径位置。 量化最终的有效路径位置并将UpPCHPOS发送到WTRU以调整UL传输定时。

    OPTIMUM INTERPOLATOR METHOD AND APPARATUS FOR DIGITAL TIMING ADJUSTMENT
    9.
    发明申请
    OPTIMUM INTERPOLATOR METHOD AND APPARATUS FOR DIGITAL TIMING ADJUSTMENT 审中-公开
    用于数字时间调整的最佳插值方法和装置

    公开(公告)号：WO2004032407A1

    公开(公告)日：2004-04-15

    申请号：PCT/US2003/030973

    申请日：2003-09-30

    Applicant: INTERDIGITAL TECHNOLOGY CORPORATION

    Inventor： BULTAN, Aykut ,  GRIECO, Donald, M.

    IPC: H04L7/00

    CPC classification number: H04L7/0029 ,  H04B1/70756 ,  H04B1/7077 ,  H04B1/7117 ,  H04L7/0004 ,  H04L25/0202

    Abstract: A digital timing synchronizer of a receiver is provided for timing synchronization to a transmitter in a wireless communication system, wherein the received signal has a timing error with respect to a reference code. A channel estimator (11) estimates an initial code phase of the received signal. A code generator (13) generates a timing reference code that is adjustable by integer increments. An interpolation feedback circuit (35) is configured for interpolation and correction of the timing error, whereby the interpolation (14) is achieved through an integer code shift, plus a quantized fractional adjustment selected from a look-up table of quantized fractional adjustment values and their associated predetermined interpolator coefficients, from which a time corrected version of the received signal is produced.

    Abstract translation: 接收机的数字定时同步器被提供用于在无线通信系统中与发射机进行定时同步，其中所接收的信号相对于参考码具有定时误差。 信道估计器（11）估计接收信号的初始码相位。 代码生成器（13）生成可以整数增量调整的定时参考代码。 内插反馈电路（35）被配置为用于内插和校正定时误差，由此通过整数代码移位加上从量化分数调整值的查找表中选择的量化分数调整来实现内插（14），以及 其相关联的预定内插器系数，从其产生接收信号的时间校正版本。

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