-
公开(公告)号：US07388847B2
公开(公告)日：2008-06-17
申请号：US10678631
申请日：2003-10-03
IPC分类号： H04Q7/00
CPC分类号： H04L1/0071 , H04L1/0003 , H04L1/0009 , H04L1/0026 , H04L1/0061 , H04L1/0618 , H04L1/20 , H04L27/2601 , H04W72/1231 , H04W72/1284
摘要： The present invention provides an improved channel quality indicator indicia for OFDM communication environments. In addition to taking into consideration carrier-to-interference ratios, the present invention also takes into consideration the degree to which the channel response varies among the sub-carriers throughout the OFDM frequency band. The carrier-to-interference ratio and the degree of channel response variation are directly or indirectly used by a base station to select coding and modulation schemes for transmissions from the base station to the mobile terminal reporting these factors. Further, scheduling of data sent to the mobile terminal and other mobile terminals competing for the same channel resources may also be based in part on the carrier-to-interference ratio and the degree to which the channel response varies.
摘要翻译： 本发明提供了用于OFDM通信环境的改进的信道质量指示符标记。 除了考虑载波干扰比之外，本发明还考虑了整个OFDM频带中的子载波之间信道响应变化的程度。 载波干扰比和信道响应变化程度由基站直接或间接地用于选择用于从基站到移动终端的报告这些因素的传输的编码和调制方案。 此外，发送到移动终端和竞争相同信道资源的其他移动终端的数据的调度也可以部分地基于载波干扰比和信道响应变化的程度。
-
公开(公告)号：US20050041622A1
公开(公告)日：2005-02-24
申请号：US10678631
申请日：2003-10-03
申请人： Christian Dubuc , Jason Duggan , Peiying Zhu
发明人： Christian Dubuc , Jason Duggan , Peiying Zhu
IPC分类号： H04L1/00 , H04L1/06 , H04L1/20 , H04L12/56 , H04L27/26 , H04W16/14 , H04W24/08 , H04W28/22 , H04W72/12 , H04Q7/00
CPC分类号： H04L1/0071 , H04L1/0003 , H04L1/0009 , H04L1/0026 , H04L1/0061 , H04L1/0618 , H04L1/20 , H04L27/2601 , H04W72/1231 , H04W72/1284
摘要： The present invention provides an improved channel quality indicator indicia for OFDM communication environments. In addition to taking into consideration carrier-to-interference ratios, the present invention also takes into consideration the degree to which the channel response varies among the sub-carriers throughout the OFDM frequency band. The carrier-to-interference ratio and the degree of channel response variation are directly or indirectly used by a base station to select coding and modulation schemes for transmissions from the base station to the mobile terminal reporting these factors. Further, scheduling of data sent to the mobile terminal and other mobile terminals competing for the same channel resources may also be based in part on the carrier-to-interference ratio and the degree to which the channel response varies.
摘要翻译： 本发明提供了用于OFDM通信环境的改进的信道质量指示符标记。 除了考虑载波干扰比之外，本发明还考虑了整个OFDM频带中的子载波之间信道响应变化的程度。 载波干扰比和信道响应变化程度由基站直接或间接地用于选择用于从基站到移动终端的报告这些因素的传输的编码和调制方案。 此外，发送到移动终端和竞争相同信道资源的其他移动终端的数据的调度也可以部分地基于载波干扰比和信道响应变化的程度。
-
公开(公告)号：US07356089B2
公开(公告)日：2008-04-08
申请号：US10655012
申请日：2003-09-05
申请人： Ming Jia , Peiying Zhu , Wen Tong , Christian Dubuc
发明人： Ming Jia , Peiying Zhu , Wen Tong , Christian Dubuc
CPC分类号： H04B7/0417 , H04B7/0682 , H04B7/10 , H04L1/0025 , H04L1/0612 , H04L1/0625 , H04L1/0656 , H04L25/0206 , H04L27/2602
摘要： A rotation by a phase offset is applied to symbols to be transmitted by one antenna relative to symbols to be transmitted from another antenna in a wireless communication system employing multi-element antennas at the transmitter. Such a phase offset allows the functionality of a MIMO system to be maintained when a MIMO channel degenerates. Advantageously, a MIMO system using the new signal design may provide a level of performance in a rich-scattering environment that is equivalent to a MIMO system using a known signal design. Furthermore, a MIMO system employing embodiments of the present invention may show significantly improvements in robustness over conventional MIMO systems.
摘要翻译： 通过相位偏移的旋转被应用于将由一个天线相对于在发射机处采用多元天线的无线通信系统中的另一个天线发送的符号要发送的符号。 当MIMO信道退化时，这种相位偏移允许维持MIMO系统的功能。 有利地，使用新信号设计的MIMO系统可以在丰富散射环境中提供等效于使用已知信号设计的MIMO系统的性能水平。 此外，采用本发明的实施例的MIMO系统可以显示出超常的MIMO系统的鲁棒性的显着改进。
-
公开(公告)号：US20050053169A1
公开(公告)日：2005-03-10
申请号：US10655012
申请日：2003-09-05
申请人： Ming Jia , Peiying Zhu , Wen Tong , Christian Dubuc
发明人： Ming Jia , Peiying Zhu , Wen Tong , Christian Dubuc
CPC分类号： H04B7/0417 , H04B7/0682 , H04B7/10 , H04L1/0025 , H04L1/0612 , H04L1/0625 , H04L1/0656 , H04L25/0206 , H04L27/2602
摘要： A rotation by a phase offset is applied to symbols to be transmitted by one antenna relative to symbols to be transmitted from another antenna in a wireless communication system employing multi-element antennas at the transmitter. Such a phase offset allows the functionality of a MIMO system to be maintained when a MIMO channel degenerates. Advantageously, a MIMO system using the new signal design may provide a level of performance in a rich-scattering environment that is equivalent to a MIMO system using a known signal design. Furthermore, a MIMO system employing embodiments of the present invention may show significantly improvements in robustness over conventional MIMO systems.
摘要翻译： 通过相位偏移的旋转被应用于将由一个天线相对于在发射机处采用多元天线的无线通信系统中的另一个天线发送的符号要发送的符号。 当MIMO信道退化时，这种相位偏移允许维持MIMO系统的功能。 有利地，使用新信号设计的MIMO系统可以在丰富散射环境中提供等效于使用已知信号设计的MIMO系统的性能水平。 此外，采用本发明的实施例的MIMO系统可以显示出超常的MIMO系统的鲁棒性的显着改进。
-
5.发明授权公开(公告)号：US09450664B2
公开(公告)日：2016-09-20
申请号：US11547073
申请日：2005-04-04
申请人： Ming Jia , Wen Tong , Jianglei Ma , Peiying Zhu , Dong-Sheng Yu
发明人： Ming Jia , Wen Tong , Jianglei Ma , Peiying Zhu , Dong-Sheng Yu
CPC分类号： H04B7/0691 , H04B7/0669 , H04B7/0689 , H04B7/0891 , H04L1/0069 , H04L1/0643 , H04L1/0662 , H04L1/0668 , H04L27/2602 , H04L27/2626 , H04L27/2647
摘要： Embodiments of the invention provide orthogonal Frequency Division Multiplexing-Space-time Block Codes (OFDMSTBC) mappings for code rate 1, 2 and 4 codes for 4 Transmit Antennas. To overcome the innate weakness of known codes, a new class of STBC codes is provided which is particularly suited for OFDM applications, although other applications are also contemplated. Codes for STBC mappings in the time direction, the frequency direction and a combined time frequency mapping for multiple antennas are provided. In OFDM applications, these codes exploit the properties of OFDM and FEC codes to substantially maintain the advantages of Alamouti codes. Furthermore, while the detailed examples given herein focus on four antenna applications, they can be easily extended to systems with more than four antennas.
摘要翻译： 本发明的实施例为4个发射天线的码率1,2和4码提供正交频分复用 - 空时块码（OFDMSTBC）映射。 为了克服已知代码的固有缺点，提供了一类新的STBC代码，其特别适用于OFDM应用，尽管也考虑了其他应用。 提供了在时间方向上的STBC映射代码，频率方向和多个天线的组合时间频率映射。 在OFDM应用中，这些代码利用OFDM和FEC码的性质来基本上保持Alamouti码的优点。 此外，虽然本文给出的详细示例集中在四个天线应用，但是它们可以容易地扩展到具有多于四个天线的系统。
-
6.发明授权公开(公告)号：US09397775B2
公开(公告)日：2016-07-19
申请号：US12875516
申请日：2010-09-03
申请人： Israfil Bahceci , Nimal Senerath , Hang Zhang , Peiying Zhu , Derek Yu , Wen Tong
发明人： Israfil Bahceci , Nimal Senerath , Hang Zhang , Peiying Zhu , Derek Yu , Wen Tong
CPC分类号： H04J3/08
摘要： In methods of operating a relay station in a multi-hop wireless relay network, the relay station in communication with a superordinate station and a subordinate station, a downlink transmission to/from the superordinate station is transmitted/received at a first frequency. An uplink transmission to/from the subordinate station is transmitted/received at a second frequency. Communications between the relay station and the superordinate station may be scheduled using frames, each frame including a downlink portion at the first frequency, and an uplink portion at the second frequency. The downlink portion includes first and second downlink subframes for communication between the superordinate station and first and second pluralities of stations, respectively. The uplink portion includes first and second uplink subframes for communication between the superordinate station and the first and second pluralities of stations, respectively. The downlink transmission occurs in the first downlink subframe, and the uplink transmission occurs in the first uplink subframe.
摘要翻译： 在多跳无线中继网络中操作中继站的方法中，与上级站和下属站进行通信的中继站，以上述第一频率发送/接收与上级站的下行链路传输。 向/从下属站的上行链路传输以第二频率被发送/接收。 可以使用帧来调度中继站和上级站之间的通信，每帧包括第一频率的下行链路部分和第二频率的上行链路部分。 下行链路部分包括分别在上位站和第一和第二多个站之间进行通信的第一和第二下行链路子帧。 上行链路部分包括第一和第二上行链路子帧，分别用于上级站与第一和第二多个站之间的通信。 在第一下行链路子帧中发生下行链路传输，并且在第一上行链路子帧中发生上行链路传输。
-
公开(公告)号：US09258102B2
公开(公告)日：2016-02-09
申请号：US11990868
申请日：2006-08-23
申请人： Jianglei Ma , Ming Jia , Wen Tong , Peiying Zhu , Evelyne Le Strat , Sarah Boumendil
发明人： Jianglei Ma , Ming Jia , Wen Tong , Peiying Zhu , Evelyne Le Strat , Sarah Boumendil
CPC分类号： H04L5/0073 , H04L5/0007 , H04L5/0023 , H04L5/0032 , H04L5/0046 , H04L5/0048 , H04L5/0057 , H04L5/0062 , H04W16/02 , H04W16/12
摘要： The present invention provides methods and devices for mitigating inter-cell interference in communication environments having a plurality of cells. In some embodiments, a time-frequency transmission resource that includes multiple sub-carriers over multiple OFDM symbol intervals is partitioned into a first zone and a second zone. In the first zone, transmissions are transmitted on at least one frequency sub-band which is common to all of the plurality of cells. In the second zone, transmissions are transmitted on at least one frequency sub-band which is used by less than all of the plurality of cells, so as to mitigate inter-cell interference. In some embodiments, in the first zone transmissions are transmitted using a transmission power which is common to all of the plurality of cells and in the second zone transmissions are transmitted using a transmission power which is used by less than all of the plurality of cells so as to mitigate inter-cell interference.
-
8.发明授权公开(公告)号：US08948093B2
公开(公告)日：2015-02-03
申请号：US12195114
申请日：2008-08-20
申请人： Hua Xu , Jianming Wu , Jianglei Ma , Ming Jia , Mohammadhadi Baligh , Peiying Zhu , Wen Tong
发明人： Hua Xu , Jianming Wu , Jianglei Ma , Ming Jia , Mohammadhadi Baligh , Peiying Zhu , Wen Tong
CPC分类号： H04B7/0689 , H04B7/063 , H04B7/0632
摘要： To perform rank adaptation for a mobile station in a wireless network, it is determined whether the mobile station is fast moving. In response to determining that the mobile station is fast moving, an open loop multi-antenna mode is selected to perform wireless communication between the mobile station and a base station. Also, selection is made from among plural ranks for the wireless communication according to the open loop multi-antenna mode between the mobile station and the base station.
摘要翻译： 为了对无线网络中的移动台执行秩调整，确定移动站是否快速移动。 响应于确定移动台正在快速移动，选择开环多天线模式来执行移动台和基站之间的无线通信。 此外，根据移动台和基站之间的开环多天线模式，从用于无线通信的多个等级中进行选择。
-
公开(公告)号：US08885520B2
公开(公告)日：2014-11-11
申请号：US12375499
申请日：2007-07-27
申请人： Hang Zhang , Peiying Zhu , Wen Tong , Mo-Han Fong , Nimal Gamini Senarath , David Steer , Derek Yu
发明人： Hang Zhang , Peiying Zhu , Wen Tong , Mo-Han Fong , Nimal Gamini Senarath , David Steer , Derek Yu
IPC分类号： H04L12/28 , H04B7/14 , H04J1/10 , H04W40/22 , H04L12/24 , H04L12/707 , H04L12/703 , H04L12/725 , H04W40/24 , H04L12/733 , H04W40/12 , H04W40/04 , H04B7/26
CPC分类号： H04W40/248 , G06F19/00 , H04B7/2606 , H04L41/082 , H04L41/0856 , H04L41/5025 , H04L45/122 , H04L45/22 , H04L45/28 , H04L45/308 , H04W40/04 , H04W40/12 , H04W40/22
摘要： A wireless communication system and method for a network having a tree topology. An initial path from a base station to an end relay node is selected. The path selection includes an active communication path and a redundant communication path. The path selection is based on at least one policy factor. The at least one policy factor is monitored and the path is updated based on a change to the monitored at least one policy factor.
摘要翻译： 一种具有树形拓扑的网络的无线通信系统和方法。 选择从基站到终端中继节点的初始路径。 路径选择包括主动通信路径和冗余通信路径。 路径选择基于至少一个策略因素。 基于对所监视的至少一个策略因素的改变来监视至少一个策略因子并且路径被更新。
-
公开(公告)号：US08843058B2
公开(公告)日：2014-09-23
申请号：US12522870
申请日：2008-01-11
申请人： Gamini Senarath , Hang Zhang , Peiying Zhu , Wen Tong , Derek Yu , David G. Steer , Guo-Qiang Q. Wang
发明人： Gamini Senarath , Hang Zhang , Peiying Zhu , Wen Tong , Derek Yu , David G. Steer , Guo-Qiang Q. Wang
CPC分类号： H04W88/04 , H04B7/15507 , H04B7/2606 , H04W16/26 , H04W36/08 , H04W56/0015 , H04W60/00 , H04W84/005
摘要： A mobile relay system for supporting communications between a fixed station and mobile terminals comprising a plurality of mobile relay stations that are associated with each other and provided on a moving platform, wherein each of the plurality of mobile relay stations is capable of facilitating communications with mobile terminals within communication range and at least one of the plurality of mobile relay stations is further capable of facilitating communications with a fixed station within communication range of the at least one of the plurality of mobile relay stations.
摘要翻译： 一种用于支持固定站与移动终端之间的通信的移动中继系统，所述移动终端包括彼此相关联并提供在移动平台上的多个移动中继站，其中所述多个移动中继站中的每一个能够促进与移动 通信范围内的终端和多个移动中继站中的至少一个还能够促进与多个移动中继站中的至少一个移动中继站的通信范围内的固定站的通信。
-
-
-
-
-
-
-
-
-
搜索结果
333 条记录 (耗时 0.03 秒)
