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1. 发明授权

US08130875B2 Method for estimating channel response in a wireless communications network based on pilot signals 有权
标题翻译：基于导频信号估计无线通信网络中信道响应的方法
公开(公告)号：US08130875B2
公开(公告)日：2012-03-06
申请号：US11929983
申请日：2007-10-30
申请人： Qingwen Liu , Genyuan Wang , Hang Jin
发明人： Qingwen Liu , Genyuan Wang , Hang Jin
IPC分类号： H04L27/06
CPC分类号： H04L25/0232 , H04L27/2647
摘要： The present invention discloses a method for estimating a channel response of data subcarriers in a wireless communications network. The method comprises estimating a first plurality of channel responses of pilot subcarriers carrying pilot signals at the time instance using pilot signals, generating a pseudo time instance for pilot subcarriers according to a predetermined rule, approximating a second plurality of channel responses at the pseudo time instance using the first plurality of channel responses, computing a rate of change in the channel response using the first and second plurality of channel responses, calculating a third plurality of channel responses of pilot subcarriers carrying data at the time instance using the first plurality of channel responses and the rate of change in the channel response, estimating the channel response of the data subcarriers from the first and third plurality of channel responses using a predetermined conventional two-dimensional channel estimation algorithm.
摘要翻译：本发明公开了一种用于估计无线通信网络中的数据子载波的信道响应的方法。该方法包括：在使用导频信号的情况下估计携带导频信号的导频子载波的第一多个信道响应，根据预定规则生成用于导频子载波的伪时间实例，在伪时间实例近似第二多个信道响应使用所述第一多个信道响应，使用所述第一和第二多个信道响应来计算所述信道响应的变化率，计算使用所述第一多个信道响应在所述时间实例中携带数据的导频子载波的第三多个信道响应以及信道响应的变化率，使用预定的常规二维信道估计算法估计来自第一和第三多个信道响应的数据子载波的信道响应。

2. 发明申请

US20080165728A1 Method and System for Scheduling Uplink Sounding Signals 有权
标题翻译：调度上行探测信号的方法和系统
公开(公告)号：US20080165728A1
公开(公告)日：2008-07-10
申请号：US11934055
申请日：2007-11-01
申请人： Qingwen Liu , Genyuan Wang , Hang Jin
发明人： Qingwen Liu , Genyuan Wang , Hang Jin
IPC分类号： H04Q7/00
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 beamforming 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的波束成形加权向量，并且在该第一帧之后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。

3. 发明申请

US20080139248A1 Method for Dynamic Uplink Sounding Region Allocation 有权
标题翻译：动态上行链路探测区域分配方法
公开(公告)号：US20080139248A1
公开(公告)日：2008-06-12
申请号：US11936774
申请日：2007-11-07
申请人： Qingwen Liu , Genyuan Wang , Hang Jin
发明人： Qingwen Liu , Genyuan Wang , Hang Jin
IPC分类号： H04B1/38
CPC分类号： H04W72/0406 , H04B17/24 , 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，使用所检索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相对应的CQI时，不需要分配探测区域。

4. 发明授权

US08073489B2 Method for dynamic uplink sounding region allocation 有权
标题翻译：动态上行探测区域分配方法
公开(公告)号：US08073489B2
公开(公告)日：2011-12-06
申请号：US11936774
申请日：2007-11-07
申请人： Qingwen Liu , Genyuan Wang , Hang Jin
发明人： Qingwen Liu , Genyuan Wang , Hang Jin
IPC分类号： H04B1/38
CPC分类号： H04W72/0406 , H04B17/24 , 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，使用所检索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相对应的CQI时，不需要分配探测区域。

5. 发明授权

US08068445B2 Scheduling uplink sounding signals 有权
标题翻译：调度上行探测信号
公开(公告)号：US08068445B2
公开(公告)日：2011-11-29
申请号：US11934055
申请日：2007-11-01
申请人： Qingwen Liu , Genyuan Wang , Hang Jin
发明人： Qingwen Liu , Genyuan Wang , Hang Jin
IPC分类号： H04W4/00 , H04W72/00 , H04J3/00 , H04B7/26
CPC分类号： H04B7/0617 , H04L5/023 , H04W72/1289
摘要： A method and apparatus are provided 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 is present in the scheduling database, computing beamforming weighting vectors for the MS using the uplink signals, and transmitting the downlink signals using the beamforming weighting vectors at a third frame subsequent the first frame.
摘要翻译：提供了一种用于调度用于移动台（MS）的上行链路探测信号的传输的方法和装置。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在调度数据库中存在与MS相关联的上行链路带宽请求时调度探测信号，使用上行链路信号计算用于MS的波束成形加权向量，并且在第一帧之后的第三帧使用波束成形加权向量发送下行链路信号帧。

6. 发明授权

US08249509B2 Dynamic channel estimation based on channel conditions 有权
标题翻译：基于信道条件的动态信道估计
公开(公告)号：US08249509B2
公开(公告)日：2012-08-21
申请号：US12276518
申请日：2008-11-24
申请人： Genyuan Wang , Hang Jin , Allaukik Abhishek , Daniel Wee
发明人： Genyuan Wang , Hang Jin , Allaukik Abhishek , Daniel Wee
IPC分类号： H04B17/00
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 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。

7. 发明授权

US08149942B1 Method and system for selecting a transmission scheme in a multiple-input-multiple-output wireless communications system 有权
标题翻译：用于在多输入多输出无线通信系统中选择传输方案的方法和系统
公开(公告)号：US08149942B1
公开(公告)日：2012-04-03
申请号：US12026928
申请日：2008-02-06
申请人： Genyuan Wang , Ahmadreza Hedayat , Hanqing Lou , Hang Jin
发明人： Genyuan Wang , Ahmadreza Hedayat , Hanqing Lou , Hang Jin
IPC分类号： H04B7/02
CPC分类号： H04B7/0617 , H04B7/0626
摘要： The present invention discloses a method for selecting a transmission scheme in a multiple-input-multiple-output (MIMO) wireless communications system. The method comprises receiving a downlink request to transmit a data stream to a wireless station, checking the availability of channel state information (CSI) associated with the wireless station, determining the validity characteristic of beamforming weighting vectors associated with the wireless station, selecting a transmission scheme from a plurality of predetermined transmission schemes based on the availability of the CSI and the validity characteristic of the beamforming weighting vectors.
摘要翻译：本发明公开了一种在多输入多输出（MIMO）无线通信系统中选择传输方案的方法。该方法包括接收向无线站发送数据流的下行链路请求，检查与无线站相关联的信道状态信息（CSI）的可用性，确定与无线站相关联的波束成形加权向量的有效性特性，选择传输基于CSI的可用性和波束成形加权矢量的有效特性，从多个预定传输方案中获取。

8. 发明授权

US08116698B2 Generalized MIMO-beamforming weight estimation 有权
标题翻译：广义MIMO波束成形权重估计
公开(公告)号：US08116698B2
公开(公告)日：2012-02-14
申请号：US12181383
申请日：2008-07-29
申请人： Ahmadreza Hedayat , Genyuan Wang , Hang Jin , Hanqing Lou
发明人： Ahmadreza Hedayat , Genyuan Wang , Hang Jin , Hanqing Lou
IPC分类号： H03C7/02 , H04M1/00 , H04B1/00 , H04B15/00
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和第一设备的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。

9. 发明授权

US08306001B2 Dynamic downlink beamforming weight estimation for beamforming-space time code transmissions 有权
标题翻译：用于波束形成空间时间码传输的动态下行链路波束成形加权估计
公开(公告)号：US08306001B2
公开(公告)日：2012-11-06
申请号：US12687181
申请日：2010-01-14
申请人： Genyuan Wang , Li Guo , Hanqing Lou , Hang Jin
发明人： Genyuan Wang , Li Guo , Hanqing Lou , Hang Jin
IPC分类号： H04B7/216
CPC分类号： H04B7/0617 , H04B7/063 , H04W72/046
摘要： Techniques are provided to improve wireless beamformed communication between first and second wireless communication devices. At a plurality of antennas of the first wireless communication device (e.g., a base station) uplink transmissions sent from the second wireless communication device (e.g., a client or mobile device or station) are received. The first wireless communication device generates a downlink beamforming weight vector from received uplink transmissions, and computes a covariance matrix for received uplink transmissions. The first wireless communication device stores history information based on the covariance matrices for received uplink transmissions. The first wireless communication device computes first and second beamforming-space time code weight vectors based on the covariance matrix for an uplink transmission received in a current frame and the history information. The first wireless communication device uses the first and second beamforming-space time code weight vectors for a beamforming-space time code transmission technique to send a downlink transmission to the second wireless communication device.
摘要翻译：提供技术来改善第一和第二无线通信设备之间的无线波束形成的通信。在第一无线通信设备（例如，基站）的多个天线处，从第二无线通信设备（例如，客户机或移动设备或站）发送的上行链路传输被接收。第一无线通信设备从接收到的上行链路传输生成下行链路波束成形加权向量，并且计算用于接收的上行链路传输的协方差矩阵。第一无线通信设备基于接收到的上行链路传输的协方差矩阵存储历史信息。第一无线通信设备基于用于当前帧中接收的上行链路传输的协方差矩阵和历史信息来计算第一和第二波束形成空间时间码权重向量。第一无线通信设备使用波束形成空间时间码传输技术的第一和第二波束形成空间时间码权重向量来向第二无线通信设备发送下行链路传输。

10. 发明授权

US08280426B2 Adaptive power balancing and phase adjustment for MIMO-beamformed communication systems 有权
标题翻译：用于MIMO波束形成通信系统的自适应功率平衡和相位调整
公开(公告)号：US08280426B2
公开(公告)日：2012-10-02
申请号：US12608285
申请日：2009-10-29
申请人： Li Guo , Genyuan Wang , Hanqing Lou , Hang Jin
发明人： Li Guo , Genyuan Wang , Hanqing Lou , Hang Jin
IPC分类号： H04B7/005
CPC分类号： H04W52/42 , H04B7/0413 , H04B7/0617 , H04B7/086
摘要： Techniques are provided for improving performance of a multiple-input multiple-output (MIMO) wireless communication system. At a first wireless communication device (e.g., a base station) having a plurality of antennas, uplink transmissions are received from a second wireless communication device (e.g., a client device). The base station determines a measure of multipath conditions between it and the second wireless communication device based on the received uplink transmissions. The base station applies downlink beamforming weight vectors together with power balance and phase adjustment factors depending on the measure of multipath conditions to transmit multiple downlink data streams across the plurality of antennas simultaneously to the second wireless communication device.
摘要翻译：提供了用于改善多输入多输出（MIMO）无线通信系统的性能的技术。在具有多个天线的第一无线通信设备（例如，基站）处，从第二无线通信设备（例如，客户端设备）接收上行链路传输。基站基于所接收的上行链路传输来确定其与第二无线通信设备之间的多径条件的测量。基站根据多径条件的测量，将多个下行链路数据流同时发送到第二无线通信设备，基站根据功率平衡和相位调整因子来应用下行链路波束成形加权向量。

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