公开(公告)号：US20100103924A1

公开(公告)日：2010-04-29

申请号：US12259228

申请日：2008-10-27

申请人： Yadunandana N. Rao ,  Apoorv Chaudhri ,  Sudhir Rao

发明人： Yadunandana N. Rao ,  Apoorv Chaudhri ,  Sudhir Rao

IPC分类号： H04L12/28

CPC分类号： H04W16/14 ,  H04W40/08 ,  H04W40/20 ,  H04W84/18 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/22 ,  Y02D70/324 ,  Y02D70/38

摘要： A method (400) and system (100) for a wireless multi-hopping communication system is provided, wherein the system (100) includes an access point (102), a source node (CR1), and a plurality of nodes. The source node (CR1) is in communication with the access point (102), and configured to transmit a signal on at least one of a plurality of frequencies. The plurality of nodes are in communication with the access point (102) and the source node (CR1), and configured to transmit a signal on at least one of the plurality of frequencies, wherein the source node (CR1) and the plurality of nodes are adapted to determine a routing path utilizing at least one intermediate node (CR2) of the plurality of nodes and a transmitting frequency of the plurality of frequencies while reducing interference to a primary user of the transmitting frequency.

摘要翻译： 提供了一种用于无线多跳通信系统的方法（400）和系统（100），其中系统（100）包括接入点（102），源节点（CR1）和多个节点。 源节点（CR1）与接入点（102）通信，并且被配置为在多个频率中的至少一个频率上发送信号。 所述多个节点与所述接入点（102）和所述源节点（CR1）通信，并且被配置为在所述多个频率中的至少一个频率上发送信号，其中所述源节点（CR1）和所述多个节点 适于使用所述多个节点中的至少一个中间节点（CR2）和所述多个频率的发射频率来确定路由路径，同时减少对所述发射频率的主用户的干扰。

公开(公告)号：US20090298522A1

公开(公告)日：2009-12-03

申请号：US12131031

申请日：2008-05-30

申请人： Apoorv Chaudhri ,  David P. Gurney ,  Yadunandana N. Rao

发明人： Apoorv Chaudhri ,  David P. Gurney ,  Yadunandana N. Rao

IPC分类号： H04Q7/20 ,  H04B7/00

CPC分类号： H04W16/14 ,  H04W52/243 ,  H04W52/281 ,  H04W52/283 ,  H04W52/367 ,  H04W72/0453 ,  H04W72/0473

摘要： A method (300, 400) and a communication system (104, 106, 200) for dynamic RF spectrum allocation among a plurality of RF transmitters (108, 110, 112). A message can be received from a first communication system. The message can include a request (130) for available RF spectrum over which to transmit RF signals. The message can indicate a geographic location of a first non-incumbent transmitter (112) associated with the first communication system. Further, for the RF spectrum, a maximum power level can be determined at which the first non-incumbent transmitter may transmit without exceeding a threshold level of interference at least one focal point (134). A RF spectrum list (138) identifying at least the RF spectrum and the determined maximum power level can be communicated to the first communication system.

摘要翻译： 一种用于多个RF发射机（108,110,112）中的动态RF频谱分配的方法（300,400）和通信系统（104,106,200）。 可以从第一通信系统接收消息。 消息可以包括用于发射RF信号的可用RF频谱的请求（130）。 该消息可以指示与第一通信系统相关联的第一非现在发射机（112）的地理位置。 此外，对于RF频谱，可以确定第一非现在发射机可以在哪个第一非现在发射机可以在不超过至少一个焦点（134）处的阈值干扰电平的情况下发射的最大功率电平。 识别至少RF频谱和确定的最大功率电平的RF频谱列表（138）可被传送到第一通信系统。

公开(公告)号：US20090135744A1

公开(公告)日：2009-05-28

申请号：US11946306

申请日：2007-11-28

申请人： Apoorv Chaudhri ,  Yadunandana N. Rao

发明人： Apoorv Chaudhri ,  Yadunandana N. Rao

IPC分类号： H04B7/005

CPC分类号： H04W16/14

摘要： A combination of subscriber clustering and link interleaving provides a cognitive radio system (CR) 100 with opportunities to sense an incumbent system's spectrum on secondary basis. The CR system (100) uses clustering to identify out-of-band channels. The CR system (100) uses link interleaving during a second mode of operation to sense and detect any incumbent (120) on in-band channels. A list of out-band channels are sensed by clusters (0, 1, 2, 3) sequentially to generate a ranked list of potential channels for future use by the CR system. These out-of-band channels can be used opportunistically in case of in-band incumbent detection.

摘要翻译： 用户聚类和链路交织的组合为认知无线电系统（CR）100提供了次要的感知现有系统频谱的机会。 CR系统（100）使用聚类来识别带外信道。 CR系统（100）在第二操作模式期间使用链路交织来感测和检测带内信道上的任何现有（120）。 簇（1，2，3）依次检测出带外信道的列表，以产生用于将来由CR系统使用的潜在信道的排序列表。 在带内现场检测的情况下，这些带外频道可以机会地使用。

公开(公告)号：US20090111463A1

公开(公告)日：2009-04-30

申请号：US11931748

申请日：2007-10-31

申请人： Matthew E. Simms ,  Apoorv Chaudhri ,  Yadunandana N. Rao

发明人： Matthew E. Simms ,  Apoorv Chaudhri ,  Yadunandana N. Rao

IPC分类号： H04Q7/20

CPC分类号： H04W16/14

摘要： A monitoring device (141) can include a transceiver (202) to receive a radio signal, and a controller (203) communicatively coupled to the transceiver to detect an infringement on the radio signal and report the infringement to a database. One or more policies within the database can be updated to mitigate the infringement. The monitoring device can also detect whether a cognitive radio (111) is generating interference on a primary spectrum used by an incumbent device (151). Other embodiments are disclosed.

摘要翻译： 监视设备（141）可以包括用于接收无线电信号的收发机（202）和通信地耦合到收发器的控制器（203），以检测对无线电信号的侵权并将侵权报告给数据库。 可以更新数据库中的一个或多个策略以减轻侵权。 监测装置还可以检测认知无线电（111）是否在现有设备（151）使用的主要频谱上产生干扰。 公开了其他实施例。

公开(公告)号：US20090054095A1

公开(公告)日：2009-02-26

申请号：US11844624

申请日：2007-08-24

申请人： Robert J. Corke ,  Apoorv Chaudhri ,  Trefor J. Delve ,  Ralf Hekmann ,  Daniel G. Prysby ,  Yadunandana N. Rao ,  Christopher G. Ware ,  Michael F. Zeleznik

发明人： Robert J. Corke ,  Apoorv Chaudhri ,  Trefor J. Delve ,  Ralf Hekmann ,  Daniel G. Prysby ,  Yadunandana N. Rao ,  Christopher G. Ware ,  Michael F. Zeleznik

IPC分类号： H04Q7/20

CPC分类号： H04W72/02 ,  H04W72/0453 ,  H04W84/08

摘要： A wireless communication network is provided in which a plurality of radio devices achieve frequency diversity. By utilizing cognitive capability within the radio devices to iteratively select frequency sets, a lowest cardinality frequency set is generated and used to communicate amongst the plurality of radio devices. Each radio device can have different hardware, as the iterative selection of frequency set can take into account the different hardware capabilities of the radio devices.

摘要翻译： 提供了一种无线通信网络，其中多个无线电设备实现频率分集。 通过利用无线电设备内的认知能力来迭代地选择频率集合，生成最低基数频率集合并用于在多个无线电设备之间进行通信。 每个无线电设备可以具有不同的硬件，因为频率集合的迭代选择可以考虑到无线电设备的不同硬件能力。

公开(公告)号：US08594590B2

公开(公告)日：2013-11-26

申请号：US12982989

申请日：2010-12-31

申请人： Young-Seo Park ,  Yadunandana N. Rao ,  Darrell J. Stogner

发明人： Young-Seo Park ,  Yadunandana N. Rao ,  Darrell J. Stogner

IPC分类号： H04B1/04

CPC分类号： H03F1/02 ,  H03F3/24 ,  H03F2200/435 ,  H03F2200/66 ,  H04L27/2623 ,  H04L27/2636

摘要： A method for controlling peak-to-average power ratio prior to amplification by a power amplifier is provided. The peak sample of a signal is predicted, window length is adjusted based on the peak width around the peak sample or subcarriers used to transmit the signal, and the window is subsequently used to clip the samples. A peak suppression window may be applied prior to predicting the peak sample when a set number of samples exceed a predetermined threshold. Window clipping may be deactivated if interference and throughput of the power amplifier is detrimentally affected. A pulse shaping filter may be optimized based on the window clipping to control transmitted signal characteristics. Various thresholds used in the prediction may be initially based on system design and power amplifier linearity and then dynamically adjusted based on an estimation of active subcarriers or of interferers present in the communication system.

摘要翻译： 提供了一种用于在功率放大器放大之前控制峰值与平均功率比的方法。 预测信号的峰值采样，基于用于发送信号的峰值采样或子载波周围的峰值宽度来调整窗口长度，并且窗口随后用于剪辑采样。 当设定数量的样本超过预定阈值时，可以在预测峰值采样之前应用峰值抑制窗口。 如果功率放大器的干扰和吞吐量受到不利影响，则可以禁用窗口削波。 可以基于窗口限幅来优化脉冲整形滤波器以控制发射信号特性。 预测中使用的各种阈值可以最初基于系统设计和功率放大器线性度，然后基于在通信系统中存在的活动子载波或干扰源的估计来动态调整。

公开(公告)号：US08565702B2

公开(公告)日：2013-10-22

申请号：US12817007

申请日：2010-06-16

申请人： Geetha K. Thampi ,  Charles H. Carter ,  Jesus F. Corretjer ,  Yadunandana N. Rao

发明人： Geetha K. Thampi ,  Charles H. Carter ,  Jesus F. Corretjer ,  Yadunandana N. Rao

IPC分类号： H04B1/10

CPC分类号： H04B1/1661 ,  H03G3/348

摘要： A channel scanning technique and apparatus provides audio hole suppression in two-way radio communications. Upon detecting the absence of a carrier signal on a priority channel during a priority scan mode of operation, a training waveform is constructed upon returning to the home-channel. The training waveform is applied to audio shaping filters within an audio lineup to suppress transients and minimize or eliminate the occurrence of audio pops at a speaker output thereby reducing the audio hole.

摘要翻译： 信道扫描技术和装置在双向无线电通信中提供音频孔抑制。 在优先扫描操作模式期间检测到在优先信道上不存在载波信号时，在返回归属信道时构建训练波形。 训练波形被应用于音频阵容中的音频整形滤波器以抑制瞬变，并且最小化或消除扬声器输出处的音频弹出的发生，从而减少音频孔。

公开(公告)号：US08451917B2

公开(公告)日：2013-05-28

申请号：US12165597

申请日：2008-06-30

申请人： Yadunandana N. Rao ,  Apoorv Chaudhri ,  Robert J. Corke

发明人： Yadunandana N. Rao ,  Apoorv Chaudhri ,  Robert J. Corke

IPC分类号： H04K1/10

CPC分类号： H04L5/0062 ,  H04L5/0007 ,  H04L27/0012

摘要： Efficient frequency spectrum sharing between at least one incumbent communication system(s) (102, 104) and at least one cognitive radio (CR) system (106, 108) is provided. The CR unit includes OFDM detection (216) for detecting the presence of OFDM signals which indicate the presence of an incumbent communication system within the shared spectrum. The CR system (106) updates channel occupancy information in response to the detected OFDM signals so as not to interfere with the incumbent communication systems (102, 104).

摘要翻译： 提供了至少一个现有通信系统（102,104）和至少一个认知无线电（CR）系统（106,108）之间的有效的频谱共享。 CR单元包括用于检测表示共享频谱内现有通信系统的存在的OFDM信号的存在的OFDM检测（216）。 CR系统（106）响应于检测到的OFDM信号来更新信道占用信息，以便不干扰现有的通信系统（102,104）。

公开(公告)号：US08204015B2

公开(公告)日：2012-06-19

申请号：US12474886

申请日：2009-05-29

申请人： Apoorv Chaudhri ,  Yadunandana N. Rao

发明人： Apoorv Chaudhri ,  Yadunandana N. Rao

IPC分类号： H04W4/00 ,  H04J1/00 ,  H04L12/413

CPC分类号： H04W16/14 ,  H04W72/082 ,  H04W88/18

摘要： The application discloses a method and apparatus for dynamic spectrum allocation to a secondary communication system seeking to operate within the spectrum of a regulated primary communication system. The method includes clustering a plurality of secondary devices based on an operating frequency utilized by each of the secondary devices. The method then includes assigning sensing opportunities to the plurality of clustered secondary devices. The method then includes, receiving sensing information from each of the clustered secondary devices. The sensing information indicates at least one of an occupied channel frequency and an unoccupied channel frequency in the spectrum. The method further includes determining at least one spectrum opportunity, in the spectrum, that is unoccupied by each of a plurality of primary devices based on the received sensing information, and allocating the at least one spectrum opportunity to at least one of the secondary devices.

摘要翻译： 本申请公开了一种用于动态频谱分配给寻求在受调节的主要通信系统的频谱范围内操作的辅助通信系统的方法和装置。 该方法包括基于每个辅助设备使用的工作频率对多个辅助设备进行聚类。 该方法然后包括将感测机会分配给多个群集二次设备。 该方法然后包括从每个群集二次设备接收感测信息。 感测信息指示频谱中的占用信道频率和未占用信道频率中的至少一个。 该方法还包括基于所接收的感测信息来确定频谱中至少一个频谱机会，其中多个主设备中的每一个未占用，并且将至少一个频谱机会分配给至少一个辅助设备。

公开(公告)号：US08140085B2

公开(公告)日：2012-03-20

申请号：US12241821

申请日：2008-09-30

申请人： Apoorv Chaudhri ,  David P. Gurney ,  Stephen L. Kuffner ,  Yadunandana N. Rao ,  Matthew E. Simms

发明人： Apoorv Chaudhri ,  David P. Gurney ,  Stephen L. Kuffner ,  Yadunandana N. Rao ,  Matthew E. Simms

IPC分类号： H04W72/00

CPC分类号： H04W72/082 ,  H04W4/02 ,  H04W8/205 ,  H04W16/14 ,  H04W48/20 ,  H04W72/02

摘要： A technique for a secondary communication system to utilize spectrum designated to another (or primary) communication system is provided. By ranking a plurality of secondary base stations based on base station transmit power, calculated required transmit power and path loss, a set of criteria is developed for selecting a highest ranked secondary base station for operation within a primary's spectrum. The ranking may be adapted based on mobility of the secondary's subscriber; and as such the secondary system communicates within the primary's spectrum using the adaptively ranked base stations. Channel selection may also be ranked. The technique and apparatus allows a cognitive radio (CR) network to operate within an incumbent network's spectrum.

摘要翻译： 提供了一种次要通信系统利用指定给另一（通信）通信系统的频谱的技术。 通过基于基站发射功率，计算的所需发射功率和路径损耗对多个次基站进行排序，开发了用于选择最高等级次级基站以在主频谱内操作的一组标准。 可以基于辅助用户的移动性来调整排名; 并且因此次级系统使用自适应排名的基站在主频谱内进行通信。 频道选择也可能被排名。 该技术和装置允许认知无线电（CR）网络在现有网络的频谱范围内运行。