公开(公告)号：US08467801B2

公开(公告)日：2013-06-18

申请号：US13437852

申请日：2012-04-02

申请人： James W. McCoy ,  Ning Chen

发明人： James W. McCoy ,  Ning Chen

IPC分类号： H04W72/00

CPC分类号： H04W24/06 ,  H04W24/10

摘要： A technique for channel sounding in a wireless communication system includes determining respective geometries of multiple subscriber stations with respect to a serving base station. Respective time periods for sounding a channel between the multiple subscriber stations and the serving base station are then set based on the respective geometries of the multiple subscriber stations.

摘要翻译： 用于无线通信系统中的信道探测的技术包括确定多个用户站相对于服务基站的相应几何形状。 然后，基于多个用户站的各自的几何形状来设定用于在多个用户站和服务基站之间发送信道的相应时间段。

公开(公告)号：US08098744B2

公开(公告)日：2012-01-17

申请号：US11649076

申请日：2007-01-03

申请人： Ning Chen ,  Jeffrey Keating ,  James W. McCoy

发明人： Ning Chen ,  Jeffrey Keating ,  James W. McCoy

IPC分类号： H04K1/10

CPC分类号： H04L27/2614

摘要： Methods and corresponding systems for reducing a peak-to-average signal ratio include determining peak and null samples of a symbol. Thereafter, an error signal is calculated that is responsive to the peak and null samples. In one embodiment the error signal has values corresponding to differences between the peak samples and a high threshold and the null samples and a low threshold. In response to the error signal, the samples are filtered to produce a filtered symbol having a reduced peak-to-average signal ratio. The error signal can also be used to calculate reserved tones on reserved subcarriers, which are combined with multi-tone subcarriers in a multi-carrier transmitter.

摘要翻译： 降低峰均信号比率的方法和相应系统包括确定符号的峰值和空样本。 此后，计算响应于峰值和空样本的误差信号。 在一个实施例中，误差信号具有对应于峰值采样和高阈值与空采样和低阈值之间的差异的值。 响应于误差信号，对样本进行滤波以产生具有降低的峰值与平均信号比的滤波符号。 误差信号还可用于计算在多载波发射机中与多音调副载波组合的保留副载波上的保留音调。

公开(公告)号：US20110096707A1

公开(公告)日：2011-04-28

申请号：US12981423

申请日：2010-12-29

申请人： James W. McCoy ,  Ning Chen

发明人： James W. McCoy ,  Ning Chen

IPC分类号： H04W52/00

CPC分类号： H04W52/08 ,  H04B17/27 ,  H04B17/336 ,  H04W24/10 ,  H04W52/367

摘要： A technique of operating a wireless communication system includes determining respective geometries of multiple subscriber stations, which include a first subscriber station and a second subscriber station, with respect to a serving base station. Respective channel sounding bandwidths for sounding the channel between the multiple subscriber stations and the serving base station are then scheduled, based on the respective geometries. The respective channel sounding bandwidths include a first channel sounding bandwidth (associated with the first subscriber station) and a second channel sounding bandwidth (associated with the second subscriber station). The first channel sounding bandwidth is greater than or equal to the second channel sounding bandwidth and the first subscriber station has a lower geometry than the second subscriber station.

摘要翻译： 操作无线通信系统的技术包括相对于服务基站确定包括第一用户站和第二用户站的多个用户站的相应几何。 然后，基于各自的几何结构来调度用于对多个用户站和服务基站之间的信道进行探测的相应信道探测带宽。 相应的信道探测带宽包括第一信道探测带宽（与第一用户站相关联）和第二信道探测带宽（与第二用户站相关联）。 第一声​​道探测带宽大于或等于第二声道探测带宽，并且第一用户台具有比第二用户台更低的几何形状。

公开(公告)号：US20080159421A1

公开(公告)日：2008-07-03

申请号：US11649076

申请日：2007-01-03

申请人： Ning Chen ,  Jeffrey Keating ,  James W. McCoy

发明人： Ning Chen ,  Jeffrey Keating ,  James W. McCoy

IPC分类号： H04L27/08 ,  H04L27/28

CPC分类号： H04L27/2614

摘要： Methods and corresponding systems for reducing a peak-to-average signal ratio include determining peak and null samples of a symbol. Thereafter, an error signal is calculated that is responsive to the peak and null samples. In one embodiment the error signal has values corresponding to differences between the peak samples and a high threshold and the null samples and a low threshold. In response to the error signal, the samples are filtered to produce a filtered symbol having a reduced peak-to-average signal ratio. The error signal can also be used to calculate reserved tones on reserved subcarriers, which are combined with multi-tone subcarriers in a multi-carrier transmitter.

摘要翻译： 降低峰均信号比率的方法和相应系统包括确定符号的峰值和空样本。 此后，计算响应于峰值和空样本的误差信号。 在一个实施例中，误差信号具有对应于峰值采样和高阈值与空采样和低阈值之间的差异的值。 响应于误差信号，对样本进行滤波以产生具有降低的峰值与平均信号比的滤波符号。 误差信号还可用于计算在多载波发射机中与多音调副载波组合的保留副载波上的保留音调。

公开(公告)号：US20080043877A1

公开(公告)日：2008-02-21

申请号：US11465976

申请日：2006-08-21

申请人： Ning Chen ,  Jeffrey Keating ,  Stephen C. Ma ,  James W. McCoy

发明人： Ning Chen ,  Jeffrey Keating ,  Stephen C. Ma ,  James W. McCoy

IPC分类号： H04L27/00

CPC分类号： H04L27/2623

摘要： A wireless transmitter exhibits improved power de-rating reduction, which improves the power efficiency of non-constant envelop communication systems by: mapping N first samples of a first discrete Fourier transform (DFT) of a group of coded symbols to M sub-carriers according to a first sub-carrier mapping rule, where M is greater than N, performing a first inverse DFT (IDFT) on the M sub-carriers to provide M second samples, clipping the M second samples according to a clipping rule to provide M third samples, performing a second DFT on the M third samples, de-mapping the M third samples to N fourth samples, and mapping the N fourth samples to O subcarriers according to a predetermined second subcarrier mapping rule, where O is greater than or equal to M. The transmitter may be advantageously implemented within a single carrier transmission scheme, such as systems that implement a single carrier-frequency division multiple access (SC-FDMA) uplink transmission scheme.

摘要翻译： 一种无线发射机具有改善的降低功率的功率，其通过以下方式提高了非恒定包络通信系统的功率效率：将编码符号组的第一离散付里叶变换（DFT）的N个第一采样映射到M个子载波， 对于M大于N的第一子载波映射规则，在M个子载波上执行第一反向DFT（IDFT）以提供M个第二采样，根据限幅规则对M个第二采样进行削波以提供M个 采样，对M个第三采样执行第二DFT，将M个第三采样去映射到N个第四采样，并根据预定的第二子载波映射规则将N个第四采样映射到O个子载波，其中O大于或等于 可以有利地在单载波传输方案中实现发射机，诸如实现单载波频分多址（SC-FDMA）上行链路传输方案的系统。

公开(公告)号：US08903447B2

公开(公告)日：2014-12-02

申请号：US12981423

申请日：2010-12-29

申请人： James W. McCoy ,  Ning Chen

发明人： James W. McCoy ,  Ning Chen

IPC分类号： H04W4/02 ,  H04B17/00 ,  H04W52/08 ,  H04W24/10 ,  H04W52/36

CPC分类号： H04W52/08 ,  H04B17/27 ,  H04B17/336 ,  H04W24/10 ,  H04W52/367

摘要： A technique of operating a wireless communication system includes determining respective geometries of multiple subscriber stations, which include a first subscriber station and a second subscriber station, with respect to a serving base station. Respective channel sounding bandwidths for sounding the channel between the multiple subscriber stations and the serving base station are then scheduled, based on the respective geometries. The respective channel sounding bandwidths include a first channel sounding bandwidth (associated with the first subscriber station) and a second channel sounding bandwidth (associated with the second subscriber station). The first channel sounding bandwidth is greater than or equal to the second channel sounding bandwidth and the first subscriber station has a lower geometry than the second subscriber station.

摘要翻译： 操作无线通信系统的技术包括相对于服务基站确定包括第一用户站和第二用户站的多个用户站的相应几何。 然后，基于各自的几何结构来调度用于对多个用户站和服务基站之间的信道进行探测的相应信道探测带宽。 相应的信道探测带宽包括第一信道探测带宽（与第一用户站相关联）和第二信道探测带宽（与第二用户站相关联）。 第一声​​道探测带宽大于或等于第二声道探测带宽，并且第一用户台具有比第二用户台更低的几何形状。

公开(公告)号：US08625522B2

公开(公告)日：2014-01-07

申请号：US13526419

申请日：2012-06-18

申请人： James W. McCoy ,  Ning Chen ,  Jayesh H. Kotecha

发明人： James W. McCoy ,  Ning Chen ,  Jayesh H. Kotecha

IPC分类号： H04W4/00 ,  H04W72/00 ,  H04J1/00 ,  H04L12/28

CPC分类号： H04L5/0037 ,  H04W72/14

摘要： A technique of operating a wireless communication device includes creating a resource block map by associating respective subscriber station identifications, corresponding to respective subscriber stations, with one or more resource blocks. The respective subscriber station identifications and the resource block map are transmitted, from a serving base station, in one or more control channel symbols.

摘要翻译： 操作无线通信设备的技术包括通过将对应于各个用户站的各个用户站标识与一个或多个资源块相关联来创建资源块映射。 从服务基站在一个或多个控制信道符号中发送相应的用户台标识和资源块映射。

公开(公告)号：US20080268888A1

公开(公告)日：2008-10-30

申请号：US11742255

申请日：2007-04-30

申请人： Ning Chen ,  Leo G. Dehner ,  James W. McCoy

发明人： Ning Chen ,  Leo G. Dehner ,  James W. McCoy

IPC分类号： H04B7/00

CPC分类号： H04W72/0406 ,  H04W48/16

摘要： A technique of operating a wireless communication system includes determining respective geometries of multiple subscriber stations, which include a first subscriber station and a second subscriber station, with respect to a serving base station. Respective control channels, which include a first control channel associated with the first subscriber station and a second control channel associated with the second subscriber station, for the multiple subscriber stations are then scheduled based on the respective geometries. The first control channel is scheduled to be encountered earlier in a control channel search procedure, of the one or more control channel symbols, than the second control channel. The first subscriber station has a lower geometry than the second subscriber station.

摘要翻译： 操作无线通信系统的技术包括相对于服务基站确定包括第一用户站和第二用户站的多个用户站的相应几何。 然后基于各自的几何结构来调度与多个用户站相关的包括与第一用户站相关联的第一控制信道和与第二用户站相关联的第二控制信道的各个控制信道。 第一控制信道被调度为比第二控制信道更早地在一个或多个控制信道符号的控制信道搜索过程中遇到。 第一用户站具有比第二用户站更低的几何形状。

公开(公告)号：US20080232300A1

公开(公告)日：2008-09-25

申请号：US11688129

申请日：2007-03-19

申请人： James W. McCoy ,  Ning Chen

发明人： James W. McCoy ,  Ning Chen

IPC分类号： H04Q7/38

CPC分类号： H04L25/0204 ,  H04L5/0007 ,  H04L5/0053 ,  H04L25/0224 ,  H04L27/2614 ,  H04W72/048 ,  Y02D70/00 ,  Y02D70/1224 ,  Y02D70/1262

摘要： A technique for improving link performance in a wireless communication system includes detecting whether subscriber stations in the wireless communication system are power-limited. The subscriber stations include at least a first subscriber station that is power-limited and a second subscriber station that is not power-limited. The technique assigns a first reference signal having a first cubic metric to the first subscriber station and a second reference signal having a second cubic metric to the second subscriber station. In this case, the first cubic metric is lower in magnitude than the second cubic metric.

摘要翻译： 一种用于改善无线通信系统中的链路性能的技术包括检测无线通信系统中的用户站是否受功率限制。 用户站至少包括功率受限的第一用户站和不受功率限制的第二用户站。 该技术将具有第一立方度量的第一参考信号分配给第一用户站，以及向第二用户站分配具有第二立方度量的第二参考信号。 在这种情况下，第一立方度量值的幅度小于第二立方度量。

公开(公告)号：US20080232234A1

公开(公告)日：2008-09-25

申请号：US11688093

申请日：2007-03-19

申请人： James W. McCoy ,  Ning Chen

发明人： James W. McCoy ,  Ning Chen

IPC分类号： H04J11/00

CPC分类号： H04W24/06 ,  H04W24/10

摘要： A technique for channel sounding in a wireless communication system includes determining respective geometries of multiple subscriber stations with respect to a serving base station. Respective time periods for sounding a channel between the multiple subscriber stations and the serving base station are then set based on the respective geometries of the multiple subscriber stations.

摘要翻译： 用于无线通信系统中的信道探测的技术包括确定多个用户站相对于服务基站的相应几何形状。 然后，基于多个用户站的各自的几何形状来设定用于在多个用户站和服务基站之间发送信道的相应时间段。