公开(公告)号：US08626072B2

公开(公告)日：2014-01-07

申请号：US13472040

申请日：2012-05-15

申请人： Hari Sankar ,  Ron Porat ,  Danjie Pan ,  Wee Peng Goh ,  Srikanth Gummadi ,  Lei Wang

发明人： Hari Sankar ,  Ron Porat ,  Danjie Pan ,  Wee Peng Goh ,  Srikanth Gummadi ,  Lei Wang

IPC分类号： H04B1/00

CPC分类号： H04L5/0032 ,  H04L1/0026 ,  H04L5/0007 ,  H04L5/0037 ,  H04L5/0057 ,  H04L5/0062 ,  H04L5/0066 ,  H04L25/0204 ,  H04W72/0406 ,  H04W72/0453 ,  H04W72/048 ,  H04W72/082

摘要： Methods and apparatus are described for mitigating intercell interference in wireless communication systems utilizing substantially the same operating frequency band across multiple neighboring coverage areas. The operating frequency band may be shared across multiple neighboring or otherwise adjacent cells, such as in a frequency reuse one configuration. The wireless communication system can synchronize one or more resource allocation regions or zones across the multiple base stations, and can coordinate a permutation type within each resource allocation zone. The base stations can coordinate a pilot configuration in each of a plurality of coordinated resource allocation regions. Subscriber stations can be assigned resources in a coordinated resource allocation region based on interference levels. A subscriber station can determine a channel estimate for each of multiple base stations in the coordinated resource allocation region to mitigate interference.

摘要翻译： 描述了用于减轻跨越多个相邻覆盖区域的基本上相同的工作频带的无线通信系统中的小区间干扰的方法和装置。 操作频带可以在多个相邻或相邻的小区之间共享，例如在频率重用一个配置中。 无线通信系统可以跨多个基站同步一个或多个资源分配区域或区域，并且可以协调每个资源分配区域内的置换类型。 基站可以协调多个协调资源分配区域中的每一个中的导频配置。 可以基于干扰级别在协调的资源分配区域中为用户站分配资源。 订户站可以确定协调资源分配区域中的多个基站中的每个基站的信道估计以减轻干扰。

公开(公告)号：US20120327888A1

公开(公告)日：2012-12-27

申请号：US13596961

申请日：2012-08-28

申请人： Hari Sankar ,  Srikanth Gummadi

发明人： Hari Sankar ,  Srikanth Gummadi

IPC分类号： H04W72/04

CPC分类号： H04L5/0053 ,  H04L5/023 ,  H04W72/121 ,  H04W72/1289

摘要： Methods and apparatuses for reducing the overhead associated with transmitting MAPs are provided by grouping client stations in different constellations into one of two or more groups/allocations based partially upon their respective channel conditions. As a result of grouping, client stations within each group/allocation share a single resource allocation and in addition, the different groups of client stations can be scheduled such that variable modulation repeat-coding schemes can be implemented for map transmissions to each group, thereby reducing the repetition rates and overhead associated with map transmissions.

摘要翻译： 通过部分地基于它们各自的信道条件将不同星座中的客户站分组成两个或多个组/分配中的一个来提供用于减少与发送MAP相关联的开销的方法和装置。 作为分组的结果，每个组/分配中的客户端站共享单个资源分配，此外，可以调度不同的客户端组，使得可以实现可变调制重复编码方案用于到每个组的映射传输，从而 减少与地图传输相关的重复率和开销。

公开(公告)号：US20090264142A1

公开(公告)日：2009-10-22

申请号：US12327732

申请日：2008-12-03

申请人： Hari Sankar ,  Ron Porat ,  Danjie Pan ,  Wee Peng Goh ,  Srikanth Gummadi ,  Lei Wang

发明人： Hari Sankar ,  Ron Porat ,  Danjie Pan ,  Wee Peng Goh ,  Srikanth Gummadi ,  Lei Wang

IPC分类号： H04B7/00 ,  H04W72/00 ,  H04L27/28

CPC分类号： H04L5/0032 ,  H04L1/0026 ,  H04L5/0007 ,  H04L5/0037 ,  H04L5/0057 ,  H04L5/0062 ,  H04L5/0066 ,  H04L25/0204 ,  H04W72/0406 ,  H04W72/0453 ,  H04W72/048 ,  H04W72/082

摘要： Methods and apparatus are described for mitigating intercell interference in wireless communication systems utilizing substantially the same operating frequency band across multiple neighboring coverage areas. The operating frequency band may be shared across multiple neighboring or otherwise adjacent cells, such as in a frequency reuse one configuration. The wireless communication system can synchronize one or more resource allocation regions or zones across the multiple base stations, and can coordinate a permutation type within each resource allocation zone. The base stations can coordinate a pilot configuration in each of a plurality of coordinated resource allocation regions. Subscriber stations can be assigned resources in a coordinated resource allocation region based on interference levels. A subscriber station can determine a channel estimate for each of multiple base stations in the coordinated resource allocation region to mitigate interference.

摘要翻译： 描述了用于减轻跨越多个相邻覆盖区域的基本上相同的工作频带的无线通信系统中的小区间干扰的方法和装置。 操作频带可以在多个相邻或相邻的小区之间共享，例如在频率重用一个配置中。 无线通信系统可以跨多个基站同步一个或多个资源分配区域或区域，并且可以协调每个资源分配区域内的置换类型。 基站可以协调多个协调资源分配区域中的每一个中的导频配置。 可以基于干扰级别在协调的资源分配区域中为用户站分配资源。 订户站可以确定协调资源分配区域中的多个基站中的每个基站的信道估计以减轻干扰。

公开(公告)号：US20090257406A1

公开(公告)日：2009-10-15

申请号：US12100339

申请日：2008-04-09

申请人： Hari Sankar ,  Srikanth Gummadi

发明人： Hari Sankar ,  Srikanth Gummadi

IPC分类号： H04J3/00 ,  H04L27/00

CPC分类号： H04L5/0053 ,  H04L5/023 ,  H04W72/121 ,  H04W72/1289

摘要： Methods and apparatuses for reducing the overhead associated with transmitting MAPs are provided by grouping client stations in different constellations into one of two or more groups/allocations based partially upon their respective channel conditions. As a result of grouping, client stations within each group/allocation share a single resource allocation and in addition, the different groups of client stations can be scheduled such that variable modulation repeat-coding schemes can be implemented for map transmissions to each group, thereby reducing the repetition rates and overhead associated with map transmissions.

摘要翻译： 通过部分地基于它们各自的信道条件将不同星座中的客户站分组成两个或多个组/分配中的一个来提供用于减少与发送MAP相关联的开销的方法和装置。 作为分组的结果，每个组/分配中的客户端站共享单个资源分配，此外，可以调度不同的客户端组，使得可以实现可变调制重复编码方案用于到每个组的映射传输，从而 减少与地图传输相关的重复率和开销。

公开(公告)号：US08724580B2

公开(公告)日：2014-05-13

申请号：US13596961

申请日：2012-08-28

申请人： Hari Sankar ,  Srikanth Gummadi

发明人： Hari Sankar ,  Srikanth Gummadi

IPC分类号： H04W4/00

CPC分类号： H04L5/0053 ,  H04L5/023 ,  H04W72/121 ,  H04W72/1289

摘要： Methods and apparatuses for reducing the overhead associated with transmitting MAPs are provided by grouping client stations in different constellations into one of two or more groups/allocations based partially upon their respective channel conditions. As a result of grouping, client stations within each group/allocation share a single resource allocation and in addition, the different groups of client stations can be scheduled such that variable modulation repeat-coding schemes can be implemented for map transmissions to each group, thereby reducing the repetition rates and overhead associated with map transmissions.

摘要翻译： 通过部分地基于它们各自的信道条件将不同星座中的客户站分组成两个或多个组/分配中的一个来提供用于减少与发送MAP相关联的开销的方法和装置。 作为分组的结果，每个组/分配中的客户端站共享单个资源分配，此外，可以调度不同的客户端组，使得可以实现可变调制重复编码方案用于到每个组的映射传输，从而 减少与地图传输相关的重复率和开销。

公开(公告)号：US08270352B2

公开(公告)日：2012-09-18

申请号：US12100339

申请日：2008-04-09

申请人： Hari Sankar ,  Srikanth Gummadi

发明人： Hari Sankar ,  Srikanth Gummadi

IPC分类号： H04W4/00

CPC分类号： H04L5/0053 ,  H04L5/023 ,  H04W72/121 ,  H04W72/1289

摘要： Methods and apparatuses for reducing the overhead associated with transmitting MAPs are provided by grouping client stations in different constellations into one of two or more groups/allocations based partially upon their respective channel conditions. As a result of grouping, client stations within each group/allocation share a single resource allocation and in addition, the different groups of client stations can be scheduled such that variable modulation repeat-coding schemes can be implemented for map transmissions to each group, thereby reducing the repetition rates and overhead associated with map transmissions.

摘要翻译： 通过部分地基于它们各自的信道条件将不同星座中的客户站分组成两个或多个组/分配中的一个来提供用于减少与发送MAP相关联的开销的方法和装置。 作为分组的结果，每个组/分配中的客户端站共享单个资源分配，此外，可以调度不同的客户端组，使得可以实现可变调制重复编码方案用于到每个组的映射传输，从而 减少与地图传输相关的重复率和开销。

公开(公告)号：US08204442B2

公开(公告)日：2012-06-19

申请号：US12327732

申请日：2008-12-03

申请人： Hari Sankar ,  Ron Porat ,  Danjie Pan ,  Wee Peng Goh ,  Srikanth Gummadi ,  Lei Wang

发明人： Hari Sankar ,  Ron Porat ,  Danjie Pan ,  Wee Peng Goh ,  Srikanth Gummadi ,  Lei Wang

IPC分类号： H04B1/00

CPC分类号： H04L5/0032 ,  H04L1/0026 ,  H04L5/0007 ,  H04L5/0037 ,  H04L5/0057 ,  H04L5/0062 ,  H04L5/0066 ,  H04L25/0204 ,  H04W72/0406 ,  H04W72/0453 ,  H04W72/048 ,  H04W72/082

摘要： Methods and apparatus are described for mitigating intercell interference in wireless communication systems utilizing substantially the same operating frequency band across multiple neighboring coverage areas. The operating frequency band may be shared across multiple neighboring or otherwise adjacent cells, such as in a frequency reuse one configuration. The wireless communication system can synchronize one or more resource allocation regions or zones across the multiple base stations, and can coordinate a permutation type within each resource allocation zone. The base stations can coordinate a pilot configuration in each of a plurality of coordinated resource allocation regions. Subscriber stations can be assigned resources in a coordinated resource allocation region based on interference levels. A subscriber station can determine a channel estimate for each of multiple base stations in the coordinated resource allocation region to mitigate interference.

摘要翻译： 描述了用于减轻跨越多个相邻覆盖区域的基本上相同的工作频带的无线通信系统中的小区间干扰的方法和装置。 操作频带可以在多个相邻或相邻的小区之间共享，例如在频率重用一个配置中。 无线通信系统可以跨多个基站同步一个或多个资源分配区域或区域，并且可以协调每个资源分配区域内的置换类型。 基站可以协调多个协调资源分配区域中的每一个中的导频配置。 可以基于干扰级别在协调的资源分配区域中为用户站分配资源。 订户站可以确定协调资源分配区域中的多个基站中的每个基站的信道估计以减轻干扰。

公开(公告)号：US20120069753A1

公开(公告)日：2012-03-22

申请号：US13175279

申请日：2011-07-01

申请人： Hari Sankar ,  Wenjun Li ,  Farrokh Abrishamkar ,  Srikanth Gummadi

发明人： Hari Sankar ,  Wenjun Li ,  Farrokh Abrishamkar ,  Srikanth Gummadi

IPC分类号： H04W24/00

CPC分类号： H04L25/0218 ,  H04L25/0228 ,  H04L25/024

摘要： Channel estimation at a user equipment includes estimating channel quality of at least one channel. A first algorithm or a second algorithm is selected based on the estimated channel quality. Channel estimation is performed based on the selected algorithm. The first algorithm may be a midamble multiplication-based algorithm. The second algorithm may be a midamble division algorithm. Channel estimation may also include estimating noise of a channel and adaptively setting a threshold based on the estimated noise to refine the channel estimation. The estimating channel quality, selecting of a first or second algorithm and channel estimation may be performed iteratively for contributing signals on a channel. An adaptive threshold may be modified across iterations. The channel estimation may also include determining a delay profile of a channel to refine the channel estimation.

摘要翻译： 在用户设备处的信道估计包括估计至少一个信道的信道质量。 基于估计的信道质量来选择第一算法或第二算法。 基于选择的算法执行信道估计。 第一种算法可以是基于midamble乘法的算法。 第二种算法可以是中间码分割算法。 信道估计还可以包括估计信道的噪声并且基于所估计的噪声自适应地设置阈值以改善信道估计。 可以迭代地执行估计信道质量，第一或第二算法的选择和信道估计，以在信道上提供信号。 可以跨迭代修改自适应阈值。 信道估计还可以包括确定信道的延迟分布以细化信道估计。

公开(公告)号：US09178539B2

公开(公告)日：2015-11-03

申请号：US13618102

申请日：2012-09-14

申请人： Todd Sutton ,  Srikanth Gummadi ,  Walid Hosseini ,  Lei Wang

发明人： Todd Sutton ,  Srikanth Gummadi ,  Walid Hosseini ,  Lei Wang

IPC分类号： H04B1/40 ,  H04B1/04 ,  H04B1/525 ,  H04L5/00

CPC分类号： H04B1/0475 ,  H04B1/525 ,  H04L5/0007 ,  H04L5/003 ,  H04L5/0066

摘要： Methods and apparatus for reducing transmit emissions are described herein. The transmit out of band emissions in an adjacent band can be reduced while complying with existing wireless communication standards through utilization of one or more of reduced transmit bandwidth, transmit operating band offset, and channel index remapping. The transceiver can support a receive operating band substantially adjacent to a band edge. The transmit operating band can be offset from an adjacent frequency band, and can use a narrower operating band than is supported by the receiver. The transmit baseband signal can have a reduced bandwidth to reduce the amount of noise. The frequency offset can introduce a larger transition band between the transmit operating band edges and the adjacent frequency band of interest. The transceiver can remap channel assignments to compensate for the frequency offset such that the frequency offset introduced in the transmitter is transparent to channel allocation.

摘要翻译： 本文描述了用于减少发射发射的方法和装置。 通过利用减少的发送带宽，发射工作频带偏移和信道索引重映射中的一个或多个，可以减少相邻频带中的发射带外发射，同时遵守现有的无线通信标准。 收发器可以支持基本上与带边缘相邻的接收操作带。 发射工作频带可以偏离相邻频带，并且可以使用比由接收机支持的更窄的工作频带。 发射基带信号可以具有减小的带宽以减少噪声量。 频率偏移可以在发射工作频带边缘和感兴趣的相邻频带之间引入更大的转换频带。 收发器可以重新分配信道分配以补偿频率偏移，使得在发射机中引入的频率偏移对信道分配是透明的。

公开(公告)号：US09059785B2

公开(公告)日：2015-06-16

申请号：US13178374

申请日：2011-07-07

申请人： Dario Fertonani ,  Aamod Dinkar Khandekar ,  Srikanth Gummadi ,  Peter John Black

发明人： Dario Fertonani ,  Aamod Dinkar Khandekar ,  Srikanth Gummadi ,  Peter John Black

IPC分类号： H04B1/16 ,  H04B1/7073

CPC分类号： H04B1/7073 ,  H04B1/70735 ,  H04B2201/70718

摘要： Timing acquisition may be performed without typical correlation computations by determining a power of a received signal at certain points in time and using the determined power to identify gaps in the received signal. By determining gaps in the received signal, frame timing may be estimated, particularly in time-division networks where the location of guard periods within a frame is known. Gap detection may thus be used for timing acquisition.

摘要翻译： 可以通过在某些时间点确定接收信号的功率并使用所确定的功率来识别接收信号中的间隙，而不进行典型的相关计算来执行定时获取。 通过确定接收信号中的间隙，可以估计帧定时，特别是在已知帧中保护周期的位置的时分网络中。 间隙检测因此可用于定时采集。