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    SDMA resource management
    1.
    发明授权
    SDMA resource management 有权
    SDMA资源管理

    公开(公告)号：US08693405B2

    公开(公告)日：2014-04-08

    申请号：US11261837

    申请日：2005-10-27

    申请人： Tingfang Ji ,  Dhananjay Ashok Gore ,  Alexei Gorokhov ,  Min Dong ,  Avneesh Agrawal

    发明人： Tingfang Ji ,  Dhananjay Ashok Gore ,  Alexei Gorokhov ,  Min Dong ,  Avneesh Agrawal

    IPC分类号： H04B7/00

    CPC分类号： H04W72/06 ,  H04B1/713 ,  H04B7/026 ,  H04L5/0023 ,  H04L5/0037 ,  H04L5/0044 ,  H04L5/023

    摘要： A method for allocating resources in a wireless communications environment comprises receiving a mapping between a first hop-port and frequency range, and determining whether to map a second access terminal to a second hop-port that is mapped to at least the same frequency range during a substantially similar instance in time, the determination made as a function of characteristics relating to a first access terminal associated with the first hop-port. The method can further include determining that the first access terminal is a candidate for employing Space-Division Multiple Access (SDMA), and mapping the second-hop port and associating the second access terminal with the second hop-port when the second access terminal is also a candidate for employing SDMA.

    摘要翻译： 一种用于在无线通信环境中分配资源的方法包括：接收第一跳跃端口和频率范围之间的映射，以及确定是否将第二接入终端映射到映射到至少相同频率范围的第二跳频端口 基本相似的时间实例，根据与与第一跳跃端口相关联的第一接入终端的特性的函数进行确定。 该方法还可以包括确定第一接入终端是采用空分多址（SDMA）的候选者，并且当第二接入终端是第二接入终端时，映射第二跳接口并将第二接入终端与第二跳接口相关联 也是采用SDMA的候选人。

    User separation in space division multiple access for a multi-carrier communication system
    2.
    发明授权
    User separation in space division multiple access for a multi-carrier communication system 有权
    用于多载波通信系统的空分多址的用户分离

    公开(公告)号：US08363603B2

    公开(公告)日：2013-01-29

    申请号：US11333890

    申请日：2006-01-18

    申请人： Min Dong ,  Tingfang Ji ,  Dhananjay Ashok Gore ,  Alexei Gorokhov ,  Arak Sutivong

    发明人： Min Dong ,  Tingfang Ji ,  Dhananjay Ashok Gore ,  Alexei Gorokhov ,  Arak Sutivong

    IPC分类号： H04W4/00

    CPC分类号： H04B7/0617 ,  H04B7/0452 ,  H04W16/04 ,  H04W16/28

    摘要： Apparatuses and methodologies are described that increase system capacity in a multi-access wireless communication system. Spatial dimensions may be utilized to distinguish between multiple signals utilizing the same channel and thereby increase system capacity. Signals may be separated by applying beamforming weights based upon the spatial signature of the user device-base station pair. Grouping spatially orthogonal or disparate user devices on the same channel facilitates separation of signals and maximization of user device throughput performance. User devices may be reassigned to groups periodically or based upon changes in the spatial relationships between the user devices and the base station.

    摘要翻译： 描述了增加多址无线通信系统中的系统容量的装置和方法。 可利用空间维度来区分使用相同信道的多个信号，从而增加系统容量。 可以基于用户设备 - 基站对的空间签名应用波束成形权重来分离信号。 在相同信道上对空间正交或不同用户设备进行分组有助于信号分离和用户设备吞吐量性能的最大化。 用户设备可以周期性地或基于用户设备和基站之间的空间关系的改变重新分配给组。

    SDMA for WCDMA
    3.
    发明授权
    SDMA for WCDMA 有权
    SDMA用于WCDMA

    公开(公告)号：US08064424B2

    公开(公告)日：2011-11-22

    申请号：US11213463

    申请日：2005-08-26

    申请人： Sharad Deepak Sambhwani ,  Dhananjay Ashok Gore ,  Avneesh Agrawal ,  Arak Sutivong ,  Alexei Gorokhov

    发明人： Sharad Deepak Sambhwani ,  Dhananjay Ashok Gore ,  Avneesh Agrawal ,  Arak Sutivong ,  Alexei Gorokhov

    IPC分类号： H04B7/216

    CPC分类号： H04J13/0048 ,  H04J13/18

    摘要： Systems and methodologies are described that facilitate increasing system capacity in a code-limited WCDMA (e.g., TDD, FDD, . . . ) wireless communication environment. According to one aspect, a larger code space can be defined by introducing multiple code clusters within a sector, wherein each cluster has a unique scrambling code. Codes within a cluster can have orthogonal Walsh sequences that can be assigned to user devices to facilitate communicating over a wireless network and can overlap with codes in another cluster. The unique scrambling code assigned to each cluster can ensure that duplicate Walsh sequences in another cluster in the same sector appear as a pseudo-noise codes.

    摘要翻译： 描述了在有限的WCDMA（例如，TDD，FDD，...）无线通信环境中增加系统容量的系统和方法。 根据一个方面，可以通过在扇区内引入多个码集来定义更大的码空间，其中每个群集具有唯一的扰码。 群集内的代码可以具有可被分配给用户设备的正交沃尔什序列，以便于通过无线网络进行通信并且可以与另一个群集中的代码重叠。 分配给每个簇的唯一扰码可以确保同一扇区中另一个簇中的重复沃尔什序列显示为伪噪声码。

    Iterative channel and interference estimation with dedicated pilot tones for OFDMA
    4.
    发明授权
    Iterative channel and interference estimation with dedicated pilot tones for OFDMA 有权
    用于OFDMA的专用导频音的迭代信道和干扰估计

    公开(公告)号：US07830976B2

    公开(公告)日：2010-11-09

    申请号：US11182235

    申请日：2005-07-15

    申请人： Alexei Gorokhov ,  Avneesh Agrawal ,  Dhananjay Ashok Gore ,  Arvind Vijay Keerthi

    发明人： Alexei Gorokhov ,  Avneesh Agrawal ,  Dhananjay Ashok Gore ,  Arvind Vijay Keerthi

    IPC分类号： H04B7/02

    CPC分类号： H04L25/0236 ,  H04L5/0007 ,  H04L5/0048 ,  H04L5/023 ,  H04L25/0248 ,  H04L27/2647

    摘要： Estimation of channel characteristics and interference level in a time-varying multi-carrier multi-user systems is carried out concurrently. To perform the estimation, a multitude of data symbols and dedicated pilot symbols are transmitted over the channel. Next, an initial estimate value is selected for the interference level. The initial estimate value for the interference level is used together with the received pilot symbols to provide a first estimate of the channel. The first estimate of the channel is used to determine a new updated value for the interference level, which in turn, is used to update the value of the first estimate of the channel iteratively. The iterations continue until the iteratively updated values of the interference level and channel satisfy predefined limits. The data symbols and the final updated value of the channel are subsequently used to provide a second estimate for the channel.

    摘要翻译： 并行执行时变多载波多用户系统中的信道特性和干扰电平的估计。 为了执行估计，通过信道发送多个数据符号和专用导频符号。 接下来，针对干扰电平选择初始估计值。 干扰电平的初始估计值与接收到的导频符号一起使用以提供信道的第一估计。 信道的第一估计用于确定用于干扰电平的新的更新值，其又用于迭代地更新信道的第一估计值。 迭代继续，直到干扰电平和通道的迭代更新值满足预定义的限制。 随后使用数据符号和信道的最终更新值来提供信道的第二估计。

    Frequency domain filtering to improve channel estimation in multicarrier systems
    5.
    发明授权
    Frequency domain filtering to improve channel estimation in multicarrier systems 失效
    频域滤波以改善多载波系统中的信道估计

    公开(公告)号：US07616711B2

    公开(公告)日：2009-11-10

    申请号：US11022360

    申请日：2004-12-22

    申请人： Dhananjay Ashok Gore ,  Avneesh Agrawal ,  Aamod Khandekar ,  Alexei Gorokhov

    发明人： Dhananjay Ashok Gore ,  Avneesh Agrawal ,  Aamod Khandekar ,  Alexei Gorokhov

    IPC分类号： H03D1/00 ,  H04L27/06

    CPC分类号： H04L27/2647 ,  H04L5/0007 ,  H04L5/0048 ,  H04L5/006 ,  H04L25/022 ,  H04L25/0226 ,  H04L25/023

    摘要： A channel estimation system comprises a filtering component that selectively scales a plurality of carriers as a function of location of the plurality of carriers within a frequency band, wherein the plurality of carriers comprises at least one data carrier and at least one pilot carrier. A component thereafter extrapolates an observation from the at least one pilot carrier, wherein a channel is estimated as a function of the extrapolated observation. The scaling of the carriers facilitates reducing a flooring effect associated with channel estimation. The filtering component can be employed at a transmitter and/or at a receiver, and can be activated and/or deactivated as a function of a sensed data packet type.

    摘要翻译： 信道估计系统包括：滤波部件，其选择性地按照频带内的多个载波的位置来缩放多个载波，其中所述多个载波包括至少一个数据载波和至少一个导频载波。 然后，组件从至少一个导频载波外推观测，其中，估计信道作为外推观测的函数。 载波的缩放有助于减少与信道估计相关的地板效应。 滤波组件可以在发射机和/或接收机处采用，并且可以作为感测数据分组类型的功能被激活和/或去激活。

    Channel Structures for a Quasi-Orthogonal Multiple-Access Communication System
    8.
    发明申请
    Channel Structures for a Quasi-Orthogonal Multiple-Access Communication System 有权
    准正交多址通信系统的信道结构

    公开(公告)号：US20100238902A1

    公开(公告)日：2010-09-23

    申请号：US12791702

    申请日：2010-06-01

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

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

    IPC分类号： H04W72/04 ,  H04W36/00

    CPC分类号： H04J11/005 ,  H04B1/7143

    摘要： A channel structure has at least two channel sets. Each channel set contains multiple channels and is associated with a specific mapping of the channels to the system resources available for data transmission. Each channel set may be defined based on a channel tree having a hierarchical structure. To achieve intra-cell interference diversity, the channel-to-resource mapping for each channel set is pseudo-random with respect to the mapping for each remaining channel set. In each scheduling interval, terminals are scheduled for transmission on the forward and/or reverse link. The scheduled terminals are assigned channels from the channel sets. Multiple terminals may use the same system resources and their overlapping transmissions may be separated in the spatial domain. For example, beamforming may be performed to send multiple overlapping transmissions on the forward link, and receiver spatial processing may be performed to separate out multiple overlapping transmissions received on the reverse link.

    摘要翻译： 通道结构具有至少两个通道组。 每个信道集合包含多个信道，并且将信道的特定映射与可用于数据传输的系统资源相关联。 可以基于具有分层结构的信道树来定义每个信道集合。 为了实现小区内干扰分集，每个信道集合的信道到资源映射相对于每个剩余信道集合的映射是伪随机的。 在每个调度间隔中，终端被调度为在前向链路和/或反向链路上传输。 调度终端从通道集分配通道。 多个终端可以使用相同的系统资源，并且它们的重叠传输可以在空间域中分离。 例如，可以执行波束成形以在前向链路上发送多个重叠传输，并且可以执行接收机空间处理以分离在反向链路上接收的多个重叠传输。