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    Frequency division multiple access schemes for wireless communication
    4.
    发明申请
    Frequency division multiple access schemes for wireless communication 失效
    用于无线通信的频分多址方案

    公开(公告)号：US20070115795A1

    公开(公告)日：2007-05-24

    申请号：US11325980

    申请日：2006-01-04

    申请人： Dhananjay Gore ,  Ravi Palanki

    发明人： Dhananjay Gore ,  Ravi Palanki

    IPC分类号： H04J11/00

    CPC分类号： H04B7/2621 ,  H04B1/00 ,  H04B1/0003 ,  H04L5/0007 ,  H04L27/2602 ,  H04L27/2607 ,  H04L27/2614

    摘要： Techniques for transmitting data using single-carrier frequency division multiple access (SC-FDMA) multiplexing schemes are described. In one aspect, data is sent on sets of adjacent subbands that are offset from one another to achieve frequency diversity. A terminal may be assigned a set of N adjacent subbands that is offset by less than N (e.g., N/2) subbands from another set of N adjacent subbands assigned to another terminal and would then observe interference on only subbands that overlap. In another aspect, a multi-carrier transmission symbol is generated with multi-carrier SC-FDMA. Multiple waveforms carrying modulation symbols in the time domain on multiple sets of subbands are generated. The multiple waveforms are pre-processed (e.g., cyclically delayed by different amounts) to obtain pre-processed waveforms, which are combined (e.g., added) to obtain a composite waveform. A cyclic prefix is appended to the composite waveform to generate the multi-carrier transmission symbol.

    摘要翻译： 描述了使用单载波频分多址（SC-FDMA）复用方案发送数据的技术。 在一个方面，在彼此偏移的相邻子带的集合上发送数据以实现频率分集。 可以向终端分配一组N个相邻子带，该组N个相邻子带从分配给另一终端的N个相邻子带的另一组偏移小于N（例如N / 2）个子带，然后将仅对重叠的子带观察到干扰。 在另一方面，使用多载波SC-FDMA生成多载波传输符号。 产生在多个子带组上的时域中承载调制符号的多个波形。 多个波形被预处理（例如，循环地延迟不同的量）以获得预处理的波形，其被组合（例如，添加）以获得复合波形。 循环前缀附加到复合波形以产生多载波传输符号。

    PRECODING FOR SEGMENT SENSITIVE SCHEDULING IN WIRELESS COMMUNICATION SYSTEMS
    5.
    发明申请
    PRECODING FOR SEGMENT SENSITIVE SCHEDULING IN WIRELESS COMMUNICATION SYSTEMS 有权
    无线通信系统中分段敏感调度的预测

    公开(公告)号：US20070098099A1

    公开(公告)日：2007-05-03

    申请号：US11553870

    申请日：2006-10-27

    申请人： Dhananjay Gore ,  Hemanth Sampath ,  Jibing Wang ,  Tamer Kadous ,  Gwendolyn Barriac

    发明人： Dhananjay Gore ,  Hemanth Sampath ,  Jibing Wang ,  Tamer Kadous ,  Gwendolyn Barriac

    IPC分类号： H04K1/10 ,  H04L1/02

    CPC分类号： H04B7/0456 ,  H04L1/0016 ,  H04L1/0026 ,  H04L1/0675 ,  H04L5/023 ,  H04L25/0206 ,  H04L27/2602 ,  H04L27/2608

    摘要： Techniques to enhance the performance in a wireless communication system using segments called subbands and using precoding are shown. According to one aspect, the bandwidth for transmission to an access terminal is constrained to a preferred bandwidth which is less than the bandwidth available for transmission to an access terminal and precoding information related to the subcarriers within the constrained bandwidth is provided to a transmitter. The precoding information related to the subcarriers within a constrained bandwidth provides feedback about the forward link channel properties relative to different subbands and may be fed back on a channel associated with the bandwidth.

    摘要翻译： 示出了使用称为子带并使用预编码的段来增强在无线通信系统中的性能的技术。 根据一个方面，用于传输到接入终端的带宽被限制到比可用于传输到接入终端的带宽的优选带宽，并且将与受限带宽内的子载波相关的预编码信息提供给发射机。 与受限带宽内的子载波相关的预编码信息提供关于相对于不同子带的前向链路信道属性的反馈，并且可以在与带宽相关联的信道上反馈。

    Rate selection for a quasi-orthogonal communication system
    9.
    发明申请
    Rate selection for a quasi-orthogonal communication system 有权
    准正交通信系统的速率选择

    公开(公告)号：US20060234646A1

    公开(公告)日：2006-10-19

    申请号：US11150417

    申请日：2005-06-10

    申请人： Ayman Naguib ,  Alexei Gorokhov ,  Tingfang Ji ,  Dhananjay Gore ,  Arak Sutivong

    发明人： Ayman Naguib ,  Alexei Gorokhov ,  Tingfang Ji ,  Dhananjay Gore ,  Arak Sutivong

    IPC分类号： H04B7/00 ,  H04B1/00

    CPC分类号： H04L1/0019 ,  H04L1/0003 ,  H04L1/0016 ,  H04L1/06 ,  H04L25/0212 ,  H04L25/0228 ,  H04L25/0242 ,  H04L25/0256

    摘要： To select a rate for a transmitter in a communication system, a receiver obtains a channel response estimate and a received SINR estimate for the transmitter, e.g., based on a pilot received from the transmitter. The receiver computes a hypothesized SINR for the transmitter based on the channel response estimate and the received SINR estimate. The receiver then selects a rate for the transmitter based on (1) the hypothesized SINR and (2) characterized statistics of noise and interference at the receiver for the transmitter, which may be given by a probability density function (PDF) of SINR loss with respect to the hypothesized SINR. A look-up table of rate versus hypothesized SINR may be generated a priori for the PDF of SINR loss. The receiver may then apply the hypothesized SINR for the transmitter to the look-up table, which then provides the rate for the transmitter.

    摘要翻译： 为了在通信系统中选择发射机的速率，接收机例如基于从发射机接收到的导频，获得用于发射机的信道响应估计和接收到的SINR估计。 接收机基于信道响应估计和接收的SINR估计来计算发射机的假设SINR。 接收机然后基于（1）假设的SINR和（2）用于发射机的接收机处的噪声和干扰的特征统计来选择发射机的速率，其可以由SINR丢失的概率密度函数（PDF）给出， 尊重假设的SINR。 速率与假设SINR的查找表可能会先于SINR损失的PDF生成。 然后，接收机可以将发射机的假设SINR应用于查找表，然后查找表提供发射机的速率。