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1. 发明授权

US08655283B2 Cluster-based cooperative spectrum sensing in cognitive radio systems 有权
标题翻译：认知无线电系统中基于簇的协作频谱感知
公开(公告)号：US08655283B2
公开(公告)日：2014-02-18
申请号：US12062590
申请日：2008-04-04
申请人： Chunhua Sun , Wei Zhang , Khaled Ben Letaief
发明人： Chunhua Sun , Wei Zhang , Khaled Ben Letaief
IPC分类号： H04B17/00
CPC分类号： H04W16/14 , H04W84/18
摘要： Cluster-based cooperative spectrum sensing is provided for cognitive radio systems. For each cluster of cognitive users, a cluster head is determined. Each cluster head collects energies of a reporting channel measured by the cognitive users within the cluster and decides whether a primary user is absent from a given spectrum. A common receiver then aggregates the cluster-level decisions made by the cluster heads, and makes a decision across multiple, or all of, the clusters whether the primary user is absent based on a fusion function of the cluster-level decisions. If the primary (licensed) user is absent, then secondary (unlicensed) users may utilize the spectrum.
摘要翻译：为认知无线电系统提供基于簇的协作频谱感知。对于每个认知用户集群，确定集群头。每个簇头收集由群集内的认知用户测量的报告信道的能量，并且确定主用户是否不在给定的频谱中。然后，公共接收器聚合由簇头做出的集群级决策，并且基于聚类级别决策的融合功能，通过多个或全部群集来决定主用户是否不存在。如果主（许可）用户不存在，则次要（未许可）用户可以利用频谱。

2. 发明申请

US20080261639A1 CLUSTER-BASED COOPERATIVE SPECTRUM SENSING IN COGNITIVE RADIO SYSTEMS 有权
标题翻译：认知无线电系统中基于聚类的合作频谱感知
公开(公告)号：US20080261639A1
公开(公告)日：2008-10-23
申请号：US12062590
申请日：2008-04-04
申请人： Chunhua Sun , Wei Zhang , Khaled Ben Letaief
发明人： Chunhua Sun , Wei Zhang , Khaled Ben Letaief
IPC分类号： H04Q7/20
CPC分类号： H04W16/14 , H04W84/18
摘要： Cluster-based cooperative spectrum sensing is provided for cognitive radio systems. For each cluster of cognitive users, a cluster head is determined. Each cluster head collects energies of a reporting channel measured by the cognitive users within the cluster and decides whether a primary user is absent from a given spectrum. A common receiver then aggregates the cluster-level decisions made by the cluster heads, and makes a decision across multiple, or all of, the clusters whether the primary user is absent based on a fusion function of the cluster-level decisions. If the primary (licensed) user is absent, then secondary (unlicensed) users may utilize the spectrum.
摘要翻译：为认知无线电系统提供基于簇的协作频谱感知。对于每个认知用户集群，确定集群头。每个簇头收集由群集内的认知用户测量的报告信道的能量，并且确定主用户是否不在给定的频谱中。然后，公共接收器聚合由簇头做出的集群级决策，并且基于聚类级别决策的融合功能，通过多个或全部群集来决定主用户是否不存在。如果主（许可）用户不存在，则次要（未许可）用户可以利用频谱。

3. 发明授权

US08774111B2 Fair and efficient channel allocation and spectrum sensing for cognitive OFDMA networks 失效
标题翻译：用于认知OFDMA网络的公平有效的信道分配和频谱感知
公开(公告)号：US08774111B2
公开(公告)日：2014-07-08
申请号：US13342839
申请日：2012-01-03
申请人： Chunhua Sun , Wei Chen , Khaled Ben Letaief
发明人： Chunhua Sun , Wei Chen , Khaled Ben Letaief
IPC分类号： H04W4/00
CPC分类号： H04W24/10 , H04W72/08
摘要： Systems, methods, and computer-readable media for a fair and efficient channel allocation and spectrum sensing for cognitive transmission in wireless networks are presented herein. A base station can send a cognitive user device a request to sense an idle channel associated with a primary network, and in response to receiving a willingness indicator or an attribute from the cognitive user device and/or a number of idle channels associated with the primary network sensed by the cognitive user device, the base station can assign the cognitive user device to transmit data on the idle channel associated with the primary network.
摘要翻译：本文介绍了用于无线网络中认知传输的公平有效的信道分配和频谱感测的系统，方法和计算机可读介质。基站可以向认知用户设备发送感知与主网络相关联的空闲信道的请求，并且响应于接收到来自认知用户设备的意愿指示符或属性和/或与主要网络相关联的多个空闲信道网络由认知用户设备感测到，基站可以分配认知用户设备在与主网络相关联的空闲信道上传输数据。

4. 发明申请

US20120281643A1 FAIR AND EFFICIENT CHANNEL ALLOCATION AND SPECTRUM SENSING FOR COGNITIVE OFDMA NETWORKS 失效
标题翻译：公平有效的信道分配和频谱感知的OFDMA网络
公开(公告)号：US20120281643A1
公开(公告)日：2012-11-08
申请号：US13342839
申请日：2012-01-03
申请人： Chunhua Sun , Wei Chen , Khaled Ben Letaief
发明人： Chunhua Sun , Wei Chen , Khaled Ben Letaief
IPC分类号： H04W72/04
CPC分类号： H04W24/10 , H04W72/08
摘要： Systems, methods, and computer-readable media for a fair and efficient channel allocation and spectrum sensing for cognitive transmission in wireless networks are presented herein. A base station can send a cognitive user device a request to sense an idle channel associated with a primary network, and in response to receiving a willingness indicator or an attribute from the cognitive user device and/or a number of idle channels associated with the primary network sensed by the cognitive user device, the base station can assign the cognitive user device to transmit data on the idle channel associated with the primary network.
摘要翻译：本文介绍了用于无线网络中认知传输的公平有效的信道分配和频谱感测的系统，方法和计算机可读介质。基站可以向认知用户设备发送感知与主网络相关联的空闲信道的请求，并且响应于接收到来自认知用户设备的意愿指示符或属性和/或与主要网络相关联的多个空闲信道网络由认知用户设备感测到，基站可以分配认知用户设备在与主网络相关联的空闲信道上传输数据。

5. 发明申请

US20110312368A1 POWER CONTROL IN COGNITIVE RADIO SYSTEMS BASED ON SPECTRUM SENSING SIDE INFORMATION 有权
标题翻译：基于光谱感知信息的认知无线电系统的功率控制
公开(公告)号：US20110312368A1
公开(公告)日：2011-12-22
申请号：US13223120
申请日：2011-08-31
申请人： Karama Hamdi , Wei Zhang , Khaled Ben Letaief
发明人： Karama Hamdi , Wei Zhang , Khaled Ben Letaief
IPC分类号： H04W52/04
CPC分类号： H04W52/26 , H04W16/14 , H04W52/242 , H04W52/243 , H04W52/246 , H04W52/265 , H04W52/283 , H04W64/00
摘要： For cognitive radio systems, the transmit power of a cognitive radio device is controlled so that the cognitive, unlicensed radio device does not interfere with the use of a shared spectrum by a primary, licensed device. Controlling the transmit power includes determining a distance, or a function of the distance, between a primary transmitter of the primary device and the cognitive radio device based on sensing information from a spectrum sensing process. The maximum transmit power of the cognitive radio device is then dynamically controlled based on the distance, or the function of the distance, while considering a worst case scenario of an underlying cognitive radio model, to guarantee a quality of service requirement of the primary device.
摘要翻译：对于认知无线电系统，认知无线电设备的发射功率被控制，使得认知的，未许可的无线电设备不会干扰主要许可设备使用共享频谱。控制发射功率包括基于来自频谱感测过程的感测信息确定主设备的主发射机与认知无线电设备之间的距离或距离的函数。然后在考虑基础认知无线电模型的最坏情况的情况下，基于距离的距离或距离的函数来动态地控制认知无线电设备的最大发射功率，以保证主设备的服务质量要求。

6. 发明申请

US20090129496A1 FULL-RATE DISTRIBUTED SPACE-TIME CODES FOR COOPERATIVE COMMUNICATIONS 有权
标题翻译：用于合作通信的全速分配空间时间码
公开(公告)号：US20090129496A1
公开(公告)日：2009-05-21
申请号：US11941293
申请日：2007-11-16
申请人： Wei Zhang , Khaled Ben Letaief
发明人： Wei Zhang , Khaled Ben Letaief
IPC分类号： H04L27/28 , H04B7/14 , H04L5/12
CPC分类号： H04L25/03242 , H04B7/15592 , H04B7/2606 , H04L25/0248 , H04L2025/0342 , Y02D70/00 , Y02D70/446 , Y02D70/449
摘要： A full-rate distributed space-time (ST) code design is provided for amplify-and-forward cooperative wireless channels. A signal space diversity technique is employed at the source node and a unique signature vector at each relay node. The distributed space-time (ST) codes can achieve full cooperative diversity and full rate. The achievable diversity gain is M+1, where M is the number of relay nodes. Optimal power allocation can be used to maximize the coding gain under a total power constraint.
摘要翻译：提供全速率分布式时空（ST）码设计，用于放大和转发协作无线信道。在源节点采用信号空间分集技术，在每个中继节点采用唯一的签名向量。分布式时空（ST）码可以实现完全的协同分集和全速率。可实现的分集增益是M + 1，其中M是中继节点的数量。最佳功率分配可以用于在总功率约束下最大化编码增益。

7. 发明授权

US08315663B2 Power control in cognitive radio systems based on spectrum sensing side information 有权
标题翻译：基于频谱感知侧信息的认知无线电系统中的功率控制
公开(公告)号：US08315663B2
公开(公告)日：2012-11-20
申请号：US13223120
申请日：2011-08-31
申请人： Karama Hamdi , Wei Zhang , Khaled Ben Letaief
发明人： Karama Hamdi , Wei Zhang , Khaled Ben Letaief
IPC分类号： H04W52/24
CPC分类号： H04W52/26 , H04W16/14 , H04W52/242 , H04W52/243 , H04W52/246 , H04W52/265 , H04W52/283 , H04W64/00
摘要： For cognitive radio systems, the transmit power of a cognitive radio device is controlled so that the cognitive, unlicensed radio device does not interfere with the use of a shared spectrum by a primary, licensed device. Controlling the transmit power includes determining a distance, or a function of the distance, between a primary transmitter of the primary device and the cognitive radio device based on sensing information from a spectrum sensing process. The maximum transmit power of the cognitive radio device is then dynamically controlled based on the distance, or the function of the distance, while considering a worst case scenario of an underlying cognitive radio model, to guarantee a quality of service requirement of the primary device.
摘要翻译：对于认知无线电系统，认知无线电设备的发射功率被控制，使得认知的，未许可的无线电设备不会干扰主要许可设备使用共享频谱。控制发射功率包括基于来自频谱感测过程的感测信息确定主设备的主发射机与认知无线电设备之间的距离或距离的函数。然后在考虑基础认知无线电模型的最坏情况的情况下，基于距离的距离或距离的函数来动态地控制认知无线电设备的最大发射功率，以保证主设备的服务质量要求。

8. 发明授权

US08792500B2 Multiuser scheduling for MIMO broadcast channels with finite rate feedback 有权
标题翻译：具有有限速率反馈的MIMO广播信道的多用户调度
公开(公告)号：US08792500B2
公开(公告)日：2014-07-29
申请号：US13240219
申请日：2011-09-22
申请人： Wei Zhang , Khaled Ben Letaief
发明人： Wei Zhang , Khaled Ben Letaief
IPC分类号： H04L12/28
CPC分类号： H04B7/0697 , H04B7/0452 , H04B7/061 , H04B7/0632 , H04B7/0691 , H04B7/0805
摘要： System and methodologies are provided herein for multiuser scheduling in a multiple-input multiple-output (MIMO) communication system. Various aspects described herein facilitate full feedback scheduling, wherein multiuser scheduling is performed based on an antenna selection and signal quality feedback, such as signal-to-interference-plus-noise ratio (SINR) feedback, from respective users. Based on information received from respective users, independent information streams can be transmitted from respective transmit antennas to respective users with the highest signal quality. Receive antenna selection can also be employed to allow respective users to select a single receive antenna on which information is to be received. Additional aspects described herein facilitate quantized feedback scheduling, wherein scheduling is performed based on signal quality feedback that is quantized into a finite number of bits by respective users.
摘要翻译：本文提供了用于多输入多输出（MIMO）通信系统中的多用户调度的系统和方法。这里描述的各个方面促进全反馈调度，其中基于来自相应用户的天线选择和信号质量反馈（例如信号与干扰加噪声比（SINR）反馈）来执行多用户调度。基于从各个用户接收的信息，可以将独立的信息流从各个发送天线发送到具有最高信号质量的各个用户。还可以采用接收天线选择以允许各个用户选择要在其上接收信息的单个接收天线。本文描述的附加方面有助于量化的反馈调度，其中基于由相应用户量化为有限位数的信号质量反馈来执行调度。

9. 发明申请

US20130035133A1 POWER CONTROL IN COGNITIVE RADIO SYSTEMS BASED ON SPECTRUM SENSING SIDE INFORMATION 有权
标题翻译：基于光谱感知信息的认知无线电系统的功率控制
公开(公告)号：US20130035133A1
公开(公告)日：2013-02-07
申请号：US13649875
申请日：2012-10-11
申请人： Karama Hamdi , Wei Zhang , Khaled Ben Letaief
发明人： Karama Hamdi , Wei Zhang , Khaled Ben Letaief
IPC分类号： H04W52/22 , H04W24/00
CPC分类号： H04W52/26 , H04W16/14 , H04W52/242 , H04W52/243 , H04W52/246 , H04W52/265 , H04W52/283 , H04W64/00
摘要： For cognitive radio systems, the transmit power of a cognitive radio device is controlled so that the cognitive, unlicensed radio device does not interfere with the use of a shared spectrum by a primary, licensed device. Controlling the transmit power includes determining a distance, or a function of the distance, between a primary transmitter of the primary device and the cognitive radio device based on sensing information from a spectrum sensing process. The maximum transmit power of the cognitive radio device is then dynamically controlled based on the distance, or the function of the distance, while considering a worst case scenario of an underlying cognitive radio model, to guarantee a quality of service requirement of the primary device.
摘要翻译：对于认知无线电系统，认知无线电设备的发射功率被控制，使得认知的，未许可的无线电设备不会干扰主要许可设备使用共享频谱。控制发射功率包括基于来自频谱感测过程的感测信息确定主设备的主发射机与认知无线电设备之间的距离或距离的函数。然后在考虑基础认知无线电模型的最坏情况的情况下，基于距离的距离或距离的函数来动态地控制认知无线电设备的最大发射功率，以保证主设备的服务质量要求。

10. 发明授权

US08054837B2 Multiuser scheduling for MIMO broadcast channels with finite rate feedback 有权
标题翻译：具有有限速率反馈的MIMO广播信道的多用户调度
公开(公告)号：US08054837B2
公开(公告)日：2011-11-08
申请号：US12108485
申请日：2008-04-23
申请人： Wei Zhang , Khaled Ben Letaief
发明人： Wei Zhang , Khaled Ben Letaief
IPC分类号： H04L12/28
CPC分类号： H04B7/0697 , H04B7/0452 , H04B7/061 , H04B7/0632 , H04B7/0691 , H04B7/0805
摘要： System and methodologies are provided herein for multiuser scheduling in a multiple-input multiple-output (MIMO) communication system. Various aspects described herein facilitate full feedback scheduling, wherein multiuser scheduling is performed based on an antenna selection and signal quality feedback, such as signal-to-interference-plus-noise ratio (SINR) feedback, from respective users. Based on information received from respective users, independent information streams can be transmitted from respective transmit antennas to respective users with the highest signal quality. Receive antenna selection can also be employed to allow respective users to select a single receive antenna on which information is to be received. Additional aspects described herein facilitate quantized feedback scheduling, wherein scheduling is performed based on signal quality feedback that is quantized into a finite number of bits by respective users.
摘要翻译：本文提供了用于多输入多输出（MIMO）通信系统中的多用户调度的系统和方法。这里描述的各个方面促进全反馈调度，其中基于来自相应用户的天线选择和信号质量反馈（例如信号与干扰加噪声比（SINR）反馈）来执行多用户调度。基于从各个用户接收的信息，可以将独立的信息流从各个发送天线发送到具有最高信号质量的各个用户。还可以采用接收天线选择以允许各个用户选择要在其上接收信息的单个接收天线。本文描述的附加方面有助于量化的反馈调度，其中基于由相应用户量化为有限位数的信号质量反馈来执行调度。

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