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1. 发明申请

WO2010059256A1 DYNAMIC CHANNEL ESTIMATION BASED ON CHANNEL CONDITIONS 审中-公开
标题翻译：基于通道条件的动态通道估计
公开(公告)号：WO2010059256A1
公开(公告)日：2010-05-27
申请号：PCT/US2009/031061
申请日：2009-01-15
申请人： CISCO TECHNOLOGY, INC. , WANG, Genyuan , JIN, Hang , ABHISHEK, Allaukik , WEE, Daniel
发明人： WANG, Genyuan , JIN, Hang , ABHISHEK, Allaukik , WEE, Daniel
IPC分类号： H04L25/02 , H04L27/26
CPC分类号： H04L25/0232 , H04L25/022 , H04L25/024 , H04L27/2647
摘要： A dynamically adaptive channel estimation process is provided for use in a wireless communication device. At a first device, a wireless transmission is received from a second device. The transmission comprises a plurality of successive symbols each of which comprises a plurality of subcarriers. The first device is configured to compute channel characterizing information for a wireless channel between the first device and the second device based on the received values at pilot subcarriers of the successive symbols. The first device is configured to select one of a plurality of channel estimation schemes based on the channel characterizing information, and to compute an estimate of channel information for the wireless channel using the selected one of the plurality of channel estimation schemes.
摘要翻译：提供了一种在无线通信设备中使用的动态自适应信道估计过程。在第一设备处，从第二设备接收无线传输。传输包括多个连续符号，每个符号包括多个子载波。第一设备被配置为基于在连续符号的导频子载波处的接收值来计算第一设备和第二设备之间的无线信道的信道特征信息。第一设备被配置为基于信道特征信息来选择多个信道估计方案之一，并且使用多个信道估计方案中的所选择的一个来计算无线信道的信道信息的估计。

2. 发明申请

WO2008051270A1 APPARATUS FOR DETECTING UPLINK RANGING CODES IN A WIRELESS COMMUNICATION SYSTEM 审中-公开
标题翻译：用于在无线通信系统中检测上行链路规范的装置
公开(公告)号：WO2008051270A1
公开(公告)日：2008-05-02
申请号：PCT/US2007/005513
申请日：2007-03-01
申请人： NAVINI NETWORKS, INC. , WANG, Genyuan , JIN, Hang , AHMED, Mansoor , WEE, Daniel
发明人： WANG, Genyuan , JIN, Hang , AHMED, Mansoor , WEE, Daniel
IPC分类号： G01S13/00
CPC分类号： H04L27/2655 , H04L27/2657 , H04L27/2662 , H04L27/2675 , H04L27/2684
摘要： An apparatus for detecting uplink ranging codes includes a first transform unit for transforming data received from a mobile station to generate first outputs; a cross-correlation unit for comparing the first outputs with possible ranging codes to generate second outputs; a screening unit for selectively passing the second outputs representing parts of the received data that match the possible ranging codes; a second transform unit for transforming the second outputs from the screening unit to generate third outputs; and a detection unit for detecting the ranging codes for the received data based on the third outputs.
摘要翻译：一种用于检测上行链路测距码的装置，包括：第一变换单元，用于变换从移动站接收到的数据，以产生第一输出; 互相关单元，用于将第一输出与可能的测距码进行比较以产生第二输出; 筛选单元，用于选择性地传递表示与可能的测距码匹配的接收数据的部分的第二输出; 第二变换单元，用于变换来自所述筛选单元的所述第二输出以产生第三输出; 以及检测单元，用于基于第三输出来检测所接收数据的测距码。

3. 发明申请

WO2009020903A2 GENERALIZED MIMO-BEAMFORMING WEIGHT ESTIMATION 审中-公开
标题翻译：通用MIMO-BEAMFORMING权重估计
公开(公告)号：WO2009020903A2
公开(公告)日：2009-02-12
申请号：PCT/US2008/072077
申请日：2008-08-04
申请人： CISCO TECHNOLOGY, INC. , HEDAYAT, Ahmadreza , WANG, Genyuan , JIN, Hang , LOU, Hanqing
发明人： HEDAYAT, Ahmadreza , WANG, Genyuan , JIN, Hang , LOU, Hanqing
IPC分类号： H04B7/06
CPC分类号： H04B7/0617 , H04B7/0404 , H04B7/0413 , H04B7/0434 , H04B7/0851
摘要： Techniques are provided to enable wireless communication between first and second wireless communication devices each having a plurality of antennas, where the second device sends the transmissions via less than all of its plurality of antennas. Each transmission may comprise a plurality of time-frequency instances. At the first communication device, data is derived representing parameters of a communication channel between the plurality of antennas of the first device and all of the plurality of antennas of the second device from the transmissions received at the plurality of antennas of the first device. Beamforming weights for transmitting one or more signal streams via the plurality of antennas of the first device to the plurality of antennas of the second device are computed based on the data representing parameters of the communication channel between the plurality of antennas of the first device and the plurality of antennas of the second device. The beamforming weights are applied to the one or more signal streams to be transmitted via the plurality of antennas of the first device to the plurality of antennas of the second device.
摘要翻译：提供技术来实现每个具有多个天线的第一和第二无线通信设备之间的无线通信，其中第二设备经由小于其全部多个天线发送传输。每个传输可以包括多个时频实例。在第一通信设备处，从第一设备的多个天线处接收到的传输中导出表示第一设备的多个天线与第二设备的所有多个天线之间的通信信道的参数的数据。基于表示第一设备的多个天线之间的通信信道的参数的数据和表示第一设备的多个天线之间的通信信道的参数的数据来计算用于经由第一设备的多个天线将一个或多个信号流发送到第二设备的多个天线的波束成形权重第二装置的多个天线。波束成形权重被施加到要经由第一设备的多个天线发送到第二设备的多个天线的一个或多个信号流。

4. 发明申请

WO2008103805A2 METHOD AND SYSTEM FOR ACHIEVING SPATIAL DIVERSITY OF A WIRELESS COMMUNICATIONS NETWORK 审中-公开
标题翻译：实现无线通信网络空间多样性的方法与系统
公开(公告)号：WO2008103805A2
公开(公告)日：2008-08-28
申请号：PCT/US2008/054543
申请日：2008-02-21
申请人： CISCO TECHNOLOGY, INC. , WANG, Genyuan , JIN, Hang , LOU, Hanqing , HEDAYAT, Ahmadreza
发明人： WANG, Genyuan , JIN, Hang , LOU, Hanqing , HEDAYAT, Ahmadreza
IPC分类号： H04B7/06 , H04B7/04
CPC分类号： H04B7/0691 , H04B7/0617 , H04B7/0671 , H04L5/0023 , H04W52/42
摘要： A method and system are provided for achieving spatial diversity of a wireless communications network. The method comprises arranging antennas on a transmitting wireless station into a plurality of antenna subgroups, wherein each of the antenna subgroups forms a virtual antenna, creating a plurality of beamformed MIMO channels using the plurality of virtual antennas, wherein each of the beamformed MIMO channel comprises a plurality of sub-carriers and corresponds to a virtual antenna, dividing sub-carriers in each of the plurality of beamformed MIMO channels into at least a first and second cluster, distributing a first amount of transmitting power to the first cluster and a second amount of transmitting power to the second cluster, wherein the first amount of transmitting power is substantially larger than the second amount of transmitting power.
摘要翻译：提供了一种用于实现无线通信网络的空间分集的方法和系统。该方法包括将发射无线站上的天线布置到多个天线子组中，其中每个天线子组形成虚拟天线，使用多个虚拟天线创建多个波束形成的MIMO信道，其中每个波束形成的MIMO信道包括多个子载波，并且对应于虚拟天线，将所述多个波束形成的MIMO信道中的每一个中的子载波划分为至少第一和第二簇，将第一发射功率量分配给所述第一簇，并将第二量向所述第二群发射功率，其中所述第一发射功率量大大地大于所述第二发射功率量。

5. 发明申请

WO2009020942A1 PILOT-BASED TWO-DIMENSIONAL CHANNEL ESTIMATION 审中-公开
标题翻译：基于导向的二维通道估计
公开(公告)号：WO2009020942A1
公开(公告)日：2009-02-12
申请号：PCT/US2008/072169
申请日：2008-08-05
申请人： CISCO TECHNOLOGY, INC. , WANG, Genyuan , JIN, Hang
发明人： WANG, Genyuan , JIN, Hang
IPC分类号： H04L25/02 , H04L5/00 , H04L27/26
CPC分类号： H04L25/0232 , H04L5/0007 , H04L5/005 , H04L25/0222 , H04L25/0226 , H04L25/0236
摘要： Techniques are provided herein to estimate channel information based a received burst that is comprises of consecutive transmissions. Each transmission comprises a plurality of data subcarriers and a plurality of pilot subcarriers on a radio frequency (RF) channel, wherein locations of the pilot subcarriers in the consecutive transmissions are different. Channel information at the pilot subcarriers is computed for each transmission in the burst. A time variation parameter and a frequency variation parameter of the channel for the burst are computed using the channel information at the pilot subcarriers for the transmissions in the burst. Channel information for at least one data subcarrier of a transmission in the burst is computed by interpolation and/or extrapolation of the channel information at the pilot subcarriers using the time variation parameter and the frequency variation parameter. The channel information for the remaining data subcarriers is computed by interpolation and/or extrapolation using the estimated channel information at the pilot subcarriers and the at least one data subcarrier.
摘要翻译：本文提供技术来基于包括连续传输的接收突发来估计信道信息。每个传输包括在射频（RF）信道上的多个数据子载波和多个导频子载波，其中连续传输中的导频子载波的位置不同。针对突发中的每个传输计算导频子载波处的信道信息。使用在突发中的传输的导频子载波处的信道信息来计算突发的信道的时间变化参数和频率变化参数。通过使用时间变化参数和频率变化参数在导频子载波处对信道信息进行内插和/或外推来计算突发中的传输的至少一个数据子载波的信道信息。通过使用在导频子载波和至少一个数据子载波处的估计信道信息的内插和/或外推来计算剩余数据子载波的信道信息。

6. 发明申请

WO2008073644A1 METHOD FOR DYNAMIC UPLINK SOUNDING REGION ALLOCATION 审中-公开
标题翻译：动态上行链接区域分配方法
公开(公告)号：WO2008073644A1
公开(公告)日：2008-06-19
申请号：PCT/US2007/084030
申请日：2007-11-08
申请人： NAVINI NETWORKS, INC. , LIU, Qingwen , WANG, Genyuan , JIN, Hang
发明人： LIU, Qingwen , WANG, Genyuan , JIN, Hang
IPC分类号： H04B7/00
CPC分类号： H04W72/0406 , H04W72/085
摘要： The present invention discloses a method for allocating an uplink sounding region dynamically to obtain downlink channel quality information (CQI) about a downlink channel. The method comprises receiving a downlink transmission request and retrieving an identification information from the downlink transmission request, searching one or more databases using the retrieved identification information as a key, identifying the CQI about the downlink channel from the one or more databases, wherein the uplink sounding region needs not to be allocated when the CQI corresponding to the downlink transmission request is identified in the databases.
摘要翻译：本发明公开了一种用于动态分配上行探测区域以获得关于下行链路信道的下行链路信道质量信息（CQI）的方法。该方法包括从下行链路传输请求接收下行链路传输请求和检索识别信息，使用检索到的识别信息作为密钥搜索一个或多个数据库，从一个或多个数据库中识别关于下行链路信道的CQI，其中上行链路当在数据库中识别出与下行链路传输请求对应的CQI时，不需要分配探测区域。

7. 发明申请

WO2008085598A1 METHOD AND SYSTEM FOR SCHEDULING UPLINK SOUNDING SIGNALS 审中-公开
标题翻译：用于调度上传信号的方法和系统
公开(公告)号：WO2008085598A1
公开(公告)日：2008-07-17
申请号：PCT/US2007/083438
申请日：2007-11-02
申请人： NAVINI NETWORKS, INC. , LIU, Qingwen , WANG, Genyuan , JIN, Hang
发明人： LIU, Qingwen , WANG, Genyuan , JIN, Hang
IPC分类号： H04L5/16
CPC分类号： H04B7/0617 , H04L5/023 , H04W72/1289
摘要： The present invention discloses a method for scheduling a transmission of uplink sounding signals for a mobile station (MS). The method comprises receiving a request to send the MS downlink signals associated with a service flow at a first frame, searching a scheduling database for pending uplink bandwidth requests from the MS, scheduling uplink transmission slots for the MS to transmit uplink signals in a second frame without scheduling a sounding signal when a uplink bandwidth request associated with the MS being present in the scheduling database, computing beamf orming weighting vectors for the MS using the uplink signals, and transmitting the downlink signals employing the beamforming weighting vectors at a third frame subsequent to the first frame.
摘要翻译：本发明公开了一种用于调度移动台（MS）的上行探测信号的传输的方法。该方法包括：在第一帧处接收发送与服务流相关联的MS下行链路信号的请求，在调度数据库中搜索来自MS的未决上行链路带宽请求，调度MS的上行链路传输时隙以在第二帧中发送上行链路信号当与调度数据库中存在的MS相关联的上行链路带宽请求调度探测信号时，使用上行链路信号计算用于MS的加权向量，并且在后续的第三帧发送采用波束成形加权向量的下行链路信号第一帧。

8. 发明申请

WO2008051658A1 METHOD AND SYSTEM FOR IMPROVING CHANNEL ESTIMATION IN A COMMUNICATIONS NETWORK 审中-公开
标题翻译：用于改善通信网络中的信道估计的方法和系统
公开(公告)号：WO2008051658A1
公开(公告)日：2008-05-02
申请号：PCT/US2007/077802
申请日：2007-09-06
申请人： NAVINI NETWORKS, INC. , WANG, Genyuan , JIN, Hang
发明人： WANG, Genyuan , JIN, Hang
IPC分类号： H04K1/10
CPC分类号： H04L25/0204 , H04L25/022 , H04L25/0232 , H04L25/0236
摘要： The present invention discloses a method for improving channel estimation in a communications network. The method comprises estimating first channel characteristics of first sub-carriers carrying pilot signals; obtaining second channel characteristics of second sub-carriers carrying data using the first channel characteristics of the first sub-carriers with an algorithm that comprises selecting a first process from the group consisting of two-dimensional interpolation and extrapolation channel estimation algorithms, breaking down the first process, according to a predetermined rule, into second processes selected from the group consisting of one-dimensional interpolation and extrapolation channel estimation algorithms, and calculating the second channel characteristics of the second sub- carriers carrying data; demodulating and decoding the data carried in the second sub-carriers using the second channel characteristics; obtaining channel information about the first and the second channel characteristics from demodulating and decoding the data; and revising the first and the second channel characteristics using the channel information.
摘要翻译：本发明公开了一种改善通信网络中信道估计的方法。该方法包括估计携带导频信号的第一子载波的第一信道特性; 使用包括从由二维插值和外推信道估计算法组成的组中选择第一处理的算法来获得使用第一子载波的第一信道特性携带数据的第二子载波的第二信道特性，分解第一子载波根据预定规则处理从由一维内插和外推信道估计算法组成的组中选择的第二进程，以及计算携带数据的第二子载波的第二信道特性; 使用第二信道特性对在第二子载波中承载的数据进行解调和解码; 从解码和解码数据中获取关于第一和第二信道特性的信道信息; 以及使用所述频道信息修改所述第一和第二频道特征。

9. 发明申请

WO2008085664A1 METHOD AND SYSTEM FOR RESIZING A MIMO CHANNEL 审中-公开
标题翻译：用于限制MIMO信道的方法和系统
公开(公告)号：WO2008085664A1
公开(公告)日：2008-07-17
申请号：PCT/US2007/087561
申请日：2007-12-14
申请人： NAVINI NETWORKS, INC. , HEDAYAT, Ahmadreza , WANG, Genyuan , JANANI, Mohammad , LOU, Hanqing , JIN, Hang
发明人： HEDAYAT, Ahmadreza , WANG, Genyuan , JANANI, Mohammad , LOU, Hanqing , JIN, Hang
IPC分类号： H04Q7/00
CPC分类号： H04L1/0625 , H04L1/0071
摘要： The present invention discloses a method for generating a signal stream in a multiple-input-multiple-output (MIMO) channel of a wireless communications system. The method comprises encoding at least one transmitting message into a first signal sequence, transforming the first signal sequence into a second and a third signal sequence by a first and a second predetermined rule, respectively, coupling the second signal sequence to a first antenna, coupling the third signal sequence to a second antenna, transmitting a signal stream comprising the first and second signal sequences to a mobile station.
摘要翻译：本发明公开了一种用于在无线通信系统的多输入多输出（MIMO）信道中生成信号流的方法。该方法包括将至少一个发送消息编码到第一信号序列中，分别通过第一和第二预定规则将第一信号序列转换成第二和第三信号序列，将第二信号序列耦合到第一天线，耦合将第三信号序列发送到第二天线，将包括第一和第二信号序列的信号流发送到移动台。

10. 发明申请

WO2008118921A2 ADAPTIVE SWITCHING TECHNIQUES FOR HYBRID AUTOMATIC REPEAT REQUEST SYSTEMS 审中-公开
标题翻译：用于混合自动重复请求系统的自适应切换技术
公开(公告)号：WO2008118921A2
公开(公告)日：2008-10-02
申请号：PCT/US2008/058166
申请日：2008-03-26
申请人： CISO TECHNOLOGY INC. , LOU, Hanqing , HEDAYAT, Ahmadreza , WANG, Genyuan , JIN, Hang
发明人： LOU, Hanqing , HEDAYAT, Ahmadreza , WANG, Genyuan , JIN, Hang
IPC分类号： H04L1/00
CPC分类号： H04L1/1825 , H04B7/0671 , H04L1/06 , H04L1/1812 , H04L5/0007
摘要： [0045] Apparatus, system, and method for an adaptive transmission selection technique. A retransmission scheme is selected for a multiple-input-multiple-output (MIMO) wireless communications system. Techniques are provided herein for selecting from a plurality of wireless communication techniques when a first device needs to retransmit a signal (one or more packets of data) to a second device. The first device determines when the signal which was originally wirelessly transmitted using beamforming techniques via multiple antennas of the first device to the second device needs to be retransmitted to the second device. If a retransmission is needed, the first device determines channel conditions with respect to the second device. The first device selects a retransmission scheme from a plurality of transmission schemes based on the channel conditions for retransmitting the signal via the multiple antennas of the first device to the second device. A first retransmission technique is selected when the channel conditions are static. A second retransmission technique is selected when the channel conditions are relatively slowly changing, and a third retransmission technique is selected when the channel conditions are relatively quickly changing.
摘要翻译：用于自适应传输选择技术的装置，系统和方法。针对多输入多输出（MIMO）无线通信系统选择重传方案。本文提供了技术，用于当第一设备需要将信号（一个或多个数据包）发送到第二设备时从多个无线通信技术中进行选择。第一设备确定何时首先通过第一设备的多个天线使用波束成形技术无线传输的信号到第二设备需要被重新发送到第二设备。如果需要重传，则第一设备确定相对于第二设备的信道条件。第一设备基于用于经由第一设备的多个天线向第二设备重传信号的信道条件，从多个传输方案中选择重传方案。当信道条件是静态时，选择第一种重传技术。当信道条件相对缓慢地改变时，选择第二重传技术，并且当信道条件相对快速变化时选择第三重传技术。

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