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    ADAPTIVE LOADING FOR ORTHOGONAL FREQUENCY DIVISION MULTIPLEX (OFDM) COMMUNICATION SYSTEMS
    21.
    发明申请
    ADAPTIVE LOADING FOR ORTHOGONAL FREQUENCY DIVISION MULTIPLEX (OFDM) COMMUNICATION SYSTEMS 有权
    正交频分多址（OFDM）通信系统的自适应加载

    公开(公告)号：US20100086066A1

    公开(公告)日：2010-04-08

    申请号：US12266842

    申请日：2008-11-07

    申请人： Rabih Chrabieh ,  Samir S. Soliman ,  Ozgur Dural

    发明人： Rabih Chrabieh ,  Samir S. Soliman ,  Ozgur Dural

    IPC分类号： H04L27/28

    CPC分类号： H04W28/08 ,  H04L5/0007 ,  H04L5/0046 ,  H04L5/0064 ,  H04L5/0085

    摘要： An orthogonal frequency division multiplex (OFDM) transmitter may adaptively load each sub-carrier, buffering less than an OFDM frame in order to reduce hardware requirements and latency. The transmitter may use feedback information from the receiver regarding the quality of the sub-carriers. In addition, combining repetition and puncturing to achieve a desired date rate per class further reduces hardware by simplifying or even eliminating an interleaver. Additional mitigation and even performance enhancement techniques are incorporated to address inter-class boundaries within an OFDM frame, such as introducing transition classes. Channel state information may be reported in various formats including full bitmap, changed subchannels, and reported bad subchannels.

    摘要翻译： 正交频分复用（OFDM）发射机可以自适应地加载每个子载波，缓冲小于OFDM帧，以便减少硬件要求和等待时间。 发射机可以使用来自接收机的关于子载波的质量的反馈信息。 此外，组合重复和删截以实现每个类别的所需日期速率通过简化或甚至消除交织器来进一步降低硬件。 并入了额外的缓解和甚至性能增强技术来解决OFDM帧内的类间边界，例如引入转换类。 信道状态信息可以以各种格式报告，包括完整的位图，改变的子信道和报告的坏子信道。

    METHOD AND APPARATUS FOR CARRIER FREQUENCY OFFSET ESTIMATION AND FRAME SYNCHRONIZATION IN A WIRELESS COMMUNICATION SYSTEM
    22.
    发明申请
    METHOD AND APPARATUS FOR CARRIER FREQUENCY OFFSET ESTIMATION AND FRAME SYNCHRONIZATION IN A WIRELESS COMMUNICATION SYSTEM 有权
    无线通信系统中载波频偏估计与帧同步的方法与装置

    公开(公告)号：US20080101520A1

    公开(公告)日：2008-05-01

    申请号：US11924609

    申请日：2007-10-26

    申请人： Yuheng Huang ,  Ozgur Dural ,  Samir Soliman ,  Amol Rajkotia

    发明人： Yuheng Huang ,  Ozgur Dural ,  Samir Soliman ,  Amol Rajkotia

    IPC分类号： H04L7/00

    CPC分类号： H04L27/2656 ,  H04L5/0016 ,  H04L27/2613 ,  H04L27/2657 ,  H04L27/2665 ,  H04L27/2675

    摘要： A method for performing carrier frequency offset estimation and frame synchronization is disclosed herein. In one approach, the method includes performing a first level frequency discrimination on at least one estimated channel tap to generate a frequency discriminated value; estimating a phase error from the frequency discriminated value; and, determining a predetermined frame synchronization pattern from the estimated phase error. A computer program product having code and a wireless communications apparatus for performing the method are also described herein.

    摘要翻译： 本文公开了一种用于执行载波频率偏移估计和帧同步的方法。 在一种方法中，该方法包括对至少一个估计信道抽头执行第一电平频率鉴别以产生频率鉴别值; 从所述频率鉴别值估计相位误差; 以及从估计的相位误差确定预定的帧同步模式。 本文还描述了一种具有代码的计算机程序产品和用于执行该方法的无线通信装置。

    SUPPORTING VOICE FOR FLEXIBLE BANDWIDTH SYSTEMS
    25.
    发明申请
    SUPPORTING VOICE FOR FLEXIBLE BANDWIDTH SYSTEMS 有权
    支持灵活的带宽系统的语音

    公开(公告)号：US20130148520A1

    公开(公告)日：2013-06-13

    申请号：US13491510

    申请日：2012-06-07

    申请人： Soumya DAS ,  Ozgur DURAL ,  Edwin C. Park ,  Bongyong SONG ,  Samir Salib SOLIMAN ,  Yuheng HUANG

    发明人： Soumya DAS ,  Ozgur DURAL ,  Edwin C. Park ,  Bongyong SONG ,  Samir Salib SOLIMAN ,  Yuheng HUANG

    IPC分类号： H04J13/00

    CPC分类号： H04J13/0077 ,  G10L19/16 ,  H04W52/12 ,  H04W52/20 ,  H04W72/00

    摘要： Methods, systems, and devices for supporting voice communications in a wireless communications system are provided. Some embodiments utilize multiple code channels to transmit the voice frames. These embodiments include parallel multi-code embodiments, offset multi-code embodiments, and multi-user multi-code embodiments. Some embodiments utilize flexible carrier bandwidths systems that may utilize portions of spectrum that may not be big enough to fit a normal bandwidth waveform. Some embodiments transmit and receive a subset of subframes of voice frames received over flexible bandwidth code channels. In some embodiments, a subset of subframes based on a flexible bandwidth scaling factor of one or more flexible bandwidth code channels is transmitted. The receiver may decode the voice frame based on the received subset of subframes. An outer loop power control set-point may be adjusted to provide a predetermined frame error rate based on the number of transmitted subframes.

    摘要翻译： 提供了用于在无线通信系统中支持语音通信的方法，系统和设备。 一些实施例利用多个代码信道来发送语音帧。 这些实施例包括并行多代码实施例，偏移多代码实施例和多用户多代码实施例。 一些实施例使用灵活的载波带宽系统，其可以利用可能不够大以适应正常带宽波形的频谱部分。 一些实施例发送和接收在灵活的带宽码信道上接收的语音帧的子帧子集。 在一些实施例中，发送基于一个或多个柔性带宽码信道的灵活带宽缩放因子的子帧子集。 接收机可以基于所接收的子帧子集对语音帧进行解码。 可以调整外部环路功率控制设定点，以基于发送的子帧的数量来提供预定的帧错误率。

    Apparatus and method for interference-adaptive communications
    26.
    发明授权
    Apparatus and method for interference-adaptive communications 有权
    用于干扰自适应通信的装置和方法

    公开(公告)号：US08355666B2

    公开(公告)日：2013-01-15

    申请号：US12208280

    申请日：2008-09-10

    申请人： Amol Rajkotia ,  Yuheng Huang ,  Ozgur Dural

    发明人： Amol Rajkotia ,  Yuheng Huang ,  Ozgur Dural

    IPC分类号： H04W4/00 ,  H04B7/216 ,  H04B1/38 ,  H04B1/00 ,  H04K3/00

    CPC分类号： H04K3/224 ,  H04L1/0071 ,  H04L5/0007 ,  H04L5/0044 ,  H04L5/006

    摘要： In embodiments, an adaptive tone erasure technique is applied to orthogonal frequency division multiplexing (OFDM) communications, such as ECMA-368 standard ultra-wideband (UWB) communications. A transmitter obtains jammed sub-carrier information and calculates an erasure mask. The jammed sub-carriers are nulled before transmitting to a receiver. In accordance with the erasure mask, bits falling on the jammed sub-carriers are replaced by erasure bits before interleaving, keeping the interleaver block size constant notwithstanding variations in the number of the jammed sub-carriers. The receiver also obtains the jammed sub-carrier information and the erasure mask. After the receiver deinterleaves the constant size blocks, it decodes the data without the erasure bits. The transmitter may detect the jammed sub-carriers itself, or obtain the information from the receiver. The receiver similarly may detect the jammed sub-carriers itself, or obtain the information from the transmitter.

    摘要翻译： 在实施例中，自适应音调删除技术被应用于诸如ECMA-368标准超宽带（UWB）通信的正交频分复用（OFDM）通信。 发射机获得卡塞的子载波信息并计算擦除掩码。 被干扰的子载波在发送到接收机之前被置零。 根据擦除掩码，在被插入的子载波之前的比特被替换为交错之前的擦除比特，保持交织器块大小恒定，尽管拥塞的副载波的数量有变化。 接收机还获得被卡住的副载波信息和擦除掩码。 在接收机对该恒定大小的块进行解交织之后，它对没有擦除位的数据进行解码。 发射机本身可以检测被干扰的子载波，或从接收机获得信息。 接收机类似地可以检测被干扰的子载波本身，或从发射机获得信息。

    Systems and methods for reducing power consumption using a variable constraint length convolutional encoder
    27.
    发明授权
    Systems and methods for reducing power consumption using a variable constraint length convolutional encoder 有权
    使用可变约束长度卷积编码器降低功耗的系统和方法

    公开(公告)号：US08249005B2

    公开(公告)日：2012-08-21

    申请号：US12436351

    申请日：2009-05-06

    申请人： Samir Soliman ,  Ozgur Dural

    发明人： Samir Soliman ,  Ozgur Dural

    IPC分类号： H04W4/00 ,  G06F11/10

    CPC分类号： H04L1/0009 ,  H04L1/0003 ,  H04L1/0025 ,  H04L1/0026 ,  H04L1/0054 ,  H04L1/0059

    摘要： Systems and methods are provided for selecting transmission parameters used in the transmission of a communication signal in a wireless communications device. In one embodiment, a computer-implemented method for determining a convolutional code constraint length and/or a modulation type is provided. The method includes obtaining a channel condition for a channel associated with transmission of the communication signal. Based at least in part on the channel condition, the method includes selecting a convolutional code constraint length and/or a modulation type for transmitting the communications signal. In some embodiments, the method also includes selecting a data rate for transmitting the communications signal.

    摘要翻译： 提供了用于选择在无线通信设备中传送通信信号中使用的传输参数的系统和方法。 在一个实施例中，提供了一种用于确定卷积码约束长度和/或调制类型的计算机实现的方法。 该方法包括获得与通信信号的发送相关联的信道的信道条件。 至少部分地基于信道条件，该方法包括选择用于发送通信信号的卷积码约束长度和/或调制类型。 在一些实施例中，该方法还包括选择用于发送通信信号的数据速率。

    MULTIDIMENSIONAL CONSTELLATIONS FOR CODED TRANSMISSION
    28.
    发明申请
    MULTIDIMENSIONAL CONSTELLATIONS FOR CODED TRANSMISSION 有权
    用于编码传输的多维协议

    公开(公告)号：US20120177138A1

    公开(公告)日：2012-07-12

    申请号：US13425351

    申请日：2012-03-20

    申请人： Rabih Chrabieh ,  Ozgur Dural

    发明人： Rabih Chrabieh ,  Ozgur Dural

    IPC分类号： H04L27/28

    CPC分类号： H04L1/0041 ,  H04L1/0058 ,  H04L1/0071 ,  H04L5/0007 ,  H04L5/0044 ,  H04L5/006

    摘要： Techniques for rotating and transmitting multidimensional constellations are disclosed. A method for rotating a multidimensional constellation may include constructing a first rotation matrix, constructing a second rotation matrix, applying orthogonality constraints to the first and second rotation matrices; selecting an optimizing rotation matrix from the first and second rotation matrices; and rotating the multidimensional constellation using the optimizing rotation matrix. Constructing the first rotation matrix and second rotation matrices may include constructing a first column that includes first matrix dements based on the number of axes in the multidimensional constellation, and additional columns that include permutations of the first matrix elements.

    摘要翻译： 公开了用于旋转和传送多维星座的技术。 旋转多维星座的方法可以包括构造第一旋转矩阵，构造第二旋转矩阵，将正交约束应用于第一和第二旋转矩阵; 从所述第一和第二旋转矩阵中选择优化旋转矩阵; 并使用优化旋转矩阵旋转多维星座。 构造第一旋转矩阵和第二旋转矩阵可以包括基于多维星座图中的轴的数量构建包括第一矩阵度量的第一列，以及包括第一矩阵元素的排列的附加列。

    Method and apparatus for timing estimation in a wireless communications system
    29.
    发明授权
    Method and apparatus for timing estimation in a wireless communications system 有权
    无线通信系统中定时估计的方法和装置

    公开(公告)号：US07974329B2

    公开(公告)日：2011-07-05

    申请号：US11924606

    申请日：2007-10-26

    申请人： Yuheng Huang ,  Ozgur Dural ,  Samir S. Soliman ,  Amol Rajkotia

    发明人： Yuheng Huang ,  Ozgur Dural ,  Samir S. Soliman ,  Amol Rajkotia

    IPC分类号： H04B1/00

    CPC分类号： H04L27/2656 ,  H04L5/0016 ,  H04L27/2613 ,  H04L27/2657 ,  H04L27/2665 ,  H04L27/2675

    摘要： A method for performing symbol timing estimation is disclosed herein. In one approach, the method includes defining a search space in a plurality of estimated magnitudes of channel taps; defining a search window in the search space; and locating a symbol timing estimate index in the search space corresponding to a maximum value of an energy of the plurality of estimated magnitudes of channel taps within the search window. A computer program product having code and a wireless communications apparatus for performing the method are also described herein.

    摘要翻译： 本文公开了一种用于执行符号定时估计的方法。 在一种方法中，该方法包括在多个估计的信道抽头的幅度中定义搜索空间; 在搜索空间中定义搜索窗口; 以及将搜索空间中的符号定时估计索引定位在与搜索窗口内的多个估计的信道抽头的大小的能量的最大值相对应的搜索空间中。 本文还描述了一种具有代码的计算机程序产品和用于执行该方法的无线通信装置。