专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

31. 发明授权

US08130848B2 Channel estimation for OFDM-based wireless communication system using sparsely spaced pilot subcarriers 失效
标题翻译：使用稀疏间隔导频子载波的基于OFDM的无线通信系统的信道估计
公开(公告)号：US08130848B2
公开(公告)日：2012-03-06
申请号：US12113918
申请日：2008-05-01
申请人： Kee-Bong Song , Won-Joon Choi
发明人： Kee-Bong Song , Won-Joon Choi
IPC分类号： H04K1/10
CPC分类号： H04L25/0204 , H04L25/0232
摘要： A device and method for performing a channel estimation for an OFDM-based wireless communication system using sparsely spaced pilot subcarriers estimates missing pilot subcarriers in an interpolation window using pilot subcarriers that are outside of the interpolation window to produce estimated pilot subcarriers for the interpolation window. The pilot subcarriers in the interpolation window and the estimated pilot subcarrier are used to compute pilot channel estimates for the interpolation window, which are then used to derive data channel estimates for the interpolation window.
摘要翻译：使用稀疏间隔的导频子载波对基于OFDM的无线通信系统进行信道估计的装置和方法使用在内插窗口之外的导频子载波估计内插窗口中的缺失导频子载波，以产生插值窗口的估计导频子载波。内插窗口中的导频子载波和估计的导频副载波被用于计算插值窗口的导频信道估计，然后将其用于导出内插窗口的数据信道估计。

32. 发明授权

US07817735B2 Device and method of performing channel estimation for OFDM-based wireless communication system 失效
标题翻译：对基于OFDM的无线通信系统进行信道估计的装置和方法
公开(公告)号：US07817735B2
公开(公告)日：2010-10-19
申请号：US11621960
申请日：2007-01-10
申请人： Kee-Bong Song , Chaohuang Zeng , Won-Joon Choi
发明人： Kee-Bong Song , Chaohuang Zeng , Won-Joon Choi
IPC分类号： H04K1/10 , H01L27/28 , H04L1/02 , H04B7/02 , H03H7/30 , H03H7/40 , H03K5/159 , H04B1/04
CPC分类号： H04L25/0232 , H04L5/023 , H04L27/2647
摘要： A device and method of performing channel estimation for an OFDM-based wireless communication system performs a Least Square interpolation with a statistical channel profile consideration on pilot channel estimates to derive data channel estimates at data subcarrier locations.
摘要翻译：对基于OFDM的无线通信系统执行信道估计的装置和方法在导频信道估计上对统计信道简档考虑执行最小二乘插值，以导出数据子载波位置处的数据信道估计。

33. 发明授权

US07817533B2 Device and method for performing channel estimation for OFDM-based signals with variable pilot subcarrier spacing 失效
标题翻译：用于对具有可变导频子载波间隔的基于OFDM的信号执行信道估计的装置和方法
公开(公告)号：US07817533B2
公开(公告)日：2010-10-19
申请号：US11621965
申请日：2007-01-10
申请人： Kee-Bong Song , Chaohuang Zeng , Won-Joon Choi
发明人： Kee-Bong Song , Chaohuang Zeng , Won-Joon Choi
IPC分类号： H04J11/00
CPC分类号： H04W24/00 , H04L5/0007 , H04L5/0048 , H04L25/0226 , H04L25/0232 , H04W48/08
摘要： A device and method for performing channel estimation for an OFDM-based wireless communication system modifies pilot subcarrier spacing to use a set of interpolation coefficients associated with a different pilot subcarrier spacing.
摘要翻译：用于对基于OFDM的无线通信系统进行信道估计的装置和方法修改导频子载波间隔以使用与不同导频子载波间隔相关联的一组内插系数。

34. 发明申请

US20070160159A1 DEVICE AND METHOD OF PERFORMING CHANNEL ESTIMATION FOR OFDM-BASED WIRELESS COMMUNICATION SYSTEM 失效
标题翻译：基于OFDM无线通信系统的信道估计的设备及方法
公开(公告)号：US20070160159A1
公开(公告)日：2007-07-12
申请号：US11621960
申请日：2007-01-10
申请人： Kee-Bong Song , Chaohuang Zeng , Won-Joon Choi
发明人： Kee-Bong Song , Chaohuang Zeng , Won-Joon Choi
IPC分类号： H04K1/10
CPC分类号： H04L25/0232 , H04L5/023 , H04L27/2647
摘要： A device and method of performing channel estimation for an OFDM-based wireless communication system performs a Least Square interpolation with a statistical channel profile consideration on pilot channel estimates to derive data channel estimates at data subcarrier locations.
摘要翻译：对基于OFDM的无线通信系统执行信道估计的装置和方法在导频信道估计上对统计信道简档考虑执行最小二乘插值，以导出数据子载波位置处的数据信道估计。

35. 发明授权

US08718667B2 Adaptive random access channel retransmission 有权
标题翻译：自适应随机接入信道重传
公开(公告)号：US08718667B2
公开(公告)日：2014-05-06
申请号：US13555083
申请日：2012-07-21
申请人： Kee-Bong Song , Xiaowen Wang , Syed A. Mujtaba
发明人： Kee-Bong Song , Xiaowen Wang , Syed A. Mujtaba
IPC分类号： H04W74/00
CPC分类号： H04W74/0833 , H04B17/318 , H04W52/146 , H04W52/241 , H04W52/367 , H04W52/48 , H04W52/50
摘要： A mobile wireless device adapts transmit power levels and number of retransmissions of a preamble sent to a wireless network. The mobile wireless device measures characteristics of a downlink signal received from the wireless network. The mobile wireless device transmits a series of preambles to the wireless network, each successive preamble having an increased power level, starting at a power level based on the measured received signal characteristics and on parameters received from the wireless network, up to a maximum transmit power level. When the transmit power level of the preamble exceeds the maximum transmit power level and when the measured downlink signal quality falls below a threshold, the mobile wireless device limits the number of preamble retransmission to less than an allowed maximum number of retransmissions. A minimum number of retransmissions is determined and adapted to higher values for larger measured values of downlink signal quality.
摘要翻译：移动无线设备适配发送功率电平和发送到无线网络的前导码的重传次数。移动无线设备测量从无线网络接收的下行链路信号的特性。移动无线设备向无线网络发送一系列前导码，每个连续的前同步码具有增加的功率电平，从基于所测量的接收信号特性的功率电平和从无线网络接收的参数开始，直到最大发射功率水平。当前导码的发射功率电平超过最大发射功率电平时，并且当所测量的下行链路信号质量低于阈值时，移动无线设备将前导码重传的数量限制为小于允许的最大重发次数。确定最小重传次数并适应较大的下行链路信号质量测量值的值。

36. 发明申请

US20130315119A1 TUNE BACK COORDINATION WITH CONNECTED MODE DISCONTINUOUS RECEIVE 有权
标题翻译：与连接模式不连续接收的回调协调
公开(公告)号：US20130315119A1
公开(公告)日：2013-11-28
申请号：US13602067
申请日：2012-08-31
申请人： Tarik TABET , Paul V. Flynn , Sreevalsan Vallath , Kee-Bong Song , Syed A. Mujtaba , Li Su
发明人： Tarik TABET , Paul V. Flynn , Sreevalsan Vallath , Kee-Bong Song , Syed A. Mujtaba , Li Su
IPC分类号： H04W72/12 , H04W52/02
CPC分类号： H04W76/28 , H04W52/0216 , H04W76/27 , Y02D70/1262 , Y02D70/1264 , Y02D70/24
摘要： A method is disclosed for coordinating a user equipment's communication with a network during tune back with C-DRX (connected mode discontinuous receive). When a user equipment tunes back to a network after a tune away or a signal fade, a scheduling request is sent to the network to indicate the tune back as quickly as possible. The user equipment waits for a downlink transmission from the network. When the user equipment does not receive the downlink transmission, the method determines if the connection between the user equipment and the network has been released. The sending of the first scheduling request and any additional scheduling requests is coordinated with the C-DRX configuration so as to maximize the battery savings of C-DRX and minimize the latency of the tune back process in case the user equipment has uplink data to send.
摘要翻译：公开了一种用于在用C-DRX（连接模式不连续接收）回调期间协调用户设备与网络的通信的方法。当用户设备在离开音乐或信号消隐后调谐回网络时，调度请求将被发送到网络，以尽可能快地指示回调。用户设备等待来自网络的下行链路传输。当用户设备没有接收到下行链路传输时，该方法确定用户设备和网络之间的连接是否已被释放。第一调度请求和任何附加调度请求的发送与C-DRX配置协调，以便最大限度地减少C-DRX的电池节省，并且在用户设备具有发送上行链路数据的情况下最小化回调过程的等待时间。

37. 发明申请

US20130272212A1 METHOD FOR IMPLEMENTING AUTONOMOUS MANAGEMENT OF RADIO RESOURCES ACROSS DUAL NETWORKS 有权
标题翻译：实现双网络无线电资源自主管理的方法
公开(公告)号：US20130272212A1
公开(公告)日：2013-10-17
申请号：US13599289
申请日：2012-08-30
申请人： Tarik Tabet , Syed A. Mujtaba , Xiaowen Wang , Paul Flynn , Kee-Bong Song , Vinay Majjigi , Youngjae Kim , Yuchul Kim , Christian Mucke
发明人： Tarik Tabet , Syed A. Mujtaba , Xiaowen Wang , Paul Flynn , Kee-Bong Song , Vinay Majjigi , Youngjae Kim , Yuchul Kim , Christian Mucke
IPC分类号： H04W88/06 , H04W74/08 , H04W72/04
CPC分类号： H04W36/0066 , H04W36/0088 , H04W76/28 , H04W88/06
摘要： Managing radio resources across dual networks includes a wireless mobile device connecting to a first wireless network using a first radio access technology. The wireless device may notify the first network of a capability to be temporarily non-responsive to the first network while maintaining a signaling connection to the first network. The wireless device may communicate with a second network. The wireless device may return to communicating with the first network subsequent to communicating with the second network, and in response to communicating with the second network for less than a predetermined amount of time, the wireless device may send a scheduling request to the first network. In response to receiving a grant acknowledgement from the first network, the wireless device may send a buffer status report that includes a value such as zero to indicate that the wireless device has returned to and can communicate with the first network.
摘要翻译：跨双网络管理无线电资源包括使用第一无线电接入技术连接到第一无线网络的无线移动设备。无线设备可以在维持到第一网络的信令连接的同时向第一网络通知临时不响应于第一网络的能力。无线设备可以与第二网络通信。无线设备可以在与第二网络通信之后返回与第一网络的通信，并且响应于与第二网络的通信少于预定的时间量，无线设备可以向第一网络发送调度请求。响应于从第一网络接收到许可确认，无线设备可以发送包括诸如零的值的缓冲器状态报告，以指示无线设备已经返回并可以与第一网络通信。

38. 发明申请

US20130035103A1 METHODS FOR TRANSMIT ANTENNA SWITCHING DURING UPLINK ACCESS PROBING 审中-公开
标题翻译：在上行链路访问探测中发送天线切换的方法
公开(公告)号：US20130035103A1
公开(公告)日：2013-02-07
申请号：US13195494
申请日：2011-08-01
申请人： Syed A. Mujtaba , Youngjae Kim , Kee-Bong Song , Xiaowen Wang
发明人： Syed A. Mujtaba , Youngjae Kim , Kee-Bong Song , Xiaowen Wang
IPC分类号： H04W74/00
CPC分类号： H04W52/50 , H04B7/0404 , H04B7/0604
摘要： Electronic devices may be provided that contain wireless communication circuitry. The wireless communication circuitry may include radio-frequency transceiver circuitry coupled to first and second antennas. An electronic device may send network access probe signals to a base station in a wireless network. If the base station responds with a corresponding acknowledgement, the electronic device and base station may establish a wireless communication link such as a cellular telephone link. In response to failure to receive the acknowledgement signal from the base station, the electronic device may increase the transmit power of a successive network access probe signal. The electronic device may switch between use of the first and second antennas when transmitting the network access probe signals. The electronic device may alternate between the first and second antennas or may use other antenna usage patterns.
摘要翻译：可以提供包含无线通信电路的电子设备。无线通信电路可以包括耦合到第一和第二天线的射频收发器电路。电子设备可以向无线网络中的基站发送网络接入探测信号。如果基站用相应的确认进行响应，则电子设备和基站可以建立诸如蜂窝电话链路的无线通信链路。响应于不能从基站接收确认信号，电子设备可以增加连续的网络接入探测信号的发射功率。当发送网络接入探测信号时，电子设备可以在使用第一和第二天线之间切换。电子设备可以在第一和第二天线之间交替，或者可以使用其他天线使用模式。

39. 发明申请

US20130033996A1 ELECTRONIC DEVICE WITH ANTENNA SWITCHING CAPABILITIES 审中-公开
标题翻译：具有天线切换能力的电子设备
公开(公告)号：US20130033996A1
公开(公告)日：2013-02-07
申请号：US13204617
申请日：2011-08-05
申请人： Kee-Bong Song , Syed A. Mujtaba
发明人： Kee-Bong Song , Syed A. Mujtaba
IPC分类号： H04W24/00 , H04J3/00 , H04L12/26
CPC分类号： H04B7/0811 , H04B7/0808 , H04B7/0817
摘要： Electronic devices may be provided that contain wireless communications circuitry capable of supporting time division multiple access. The wireless communications circuitry may include radio-frequency transceiver circuitry coupled to multiple antennas. Signal strength measurements may be gathered using the antennas and corresponding signal strength difference measurements may be computed to reflect which of the antennas is exhibiting superior performance. The signal strength measurements may be made by measuring receive power levels in a beacon channel during idle time slots while toggling its antennas in and out of use or by detecting for the presence of non-silent traffic channel frames or silence indicator description frames and measuring corresponding receive power levels while toggling its antennas in and out of use. Beacon-channel-based measurements and non-silent-frame-based measurements may be used for electronic devices with receive diversity by simultaneously receiving frames of interest using each of its antennas and making corresponding measurements in parallel.
摘要翻译：可以提供包含能够支持时分多址的无线通信电路的电子设备。无线通信电路可以包括耦合到多个天线的射频收发器电路。可以使用天线来收集信号强度测量值，并且可以计算相应的信号强度差测量值，以反映哪些天线表现出优异的性能。信号强度测量可以通过在空闲时隙期间测量信标信道中的接收功率电平，同时切换其天线进出使用或通过检测非静默业务信道帧或静音指示符描述帧的存在并测量相应的在切换天线的同时切换和使用接收功率电平。基于信标通道的测量和非静音帧测量可以用于具有接收分集的电子设备，通过使用其每个天线同时接收感兴趣的帧并且并行地进行相应的测量。

40. 发明申请

US20120115553A1 ADAPTIVE ANTENNA DIVERSITY SYSTEM 有权
标题翻译：自适应天线多样性系统
公开(公告)号：US20120115553A1
公开(公告)日：2012-05-10
申请号：US12941008
申请日：2010-11-05
申请人： Isabel G. Mahe , Jianxiong Shi , Kee-Bong Song , Ming Hu , William S. Burchill , Syed A. Mujtaba , Johnson O. Sebeni , Haining Zhang
发明人： Isabel G. Mahe , Jianxiong Shi , Kee-Bong Song , Ming Hu , William S. Burchill , Syed A. Mujtaba , Johnson O. Sebeni , Haining Zhang
IPC分类号： H04W88/02
CPC分类号： H04B7/0874 , H04B7/0825 , H04W52/0245 , Y02D70/142 , Y02D70/144 , Y02D70/164 , Y02D70/23 , Y02D70/26 , Y02D70/444
摘要： Electronic devices may be provided that contain wireless communications circuitry. The wireless communications circuitry may include radio-frequency transceiver circuitry with first and second ports that are coupled by switching circuitry to first and second antennas. A first receiver in the transceiver circuitry may be associated with the first port and a second receiver in the transceiver circuitry may be associated with the second port. An electronic device may be operated in a single receiver mode in which only one of the receivers is active to conserve power or a dual receiver mode in which signals from both antennas may be received in parallel to compare antenna performance. Based on antenna performance metrics, the electronic device may adjust the switching circuitry to ensure that an optimal antenna is being used.
摘要翻译：可以提供包含无线通信电路的电子设备。无线通信电路可以包括射频收发器电路，其中第一和第二端口由开关电路耦合到第一和第二天线。收发器电路中的第一接收器可以与第一端口相关联，并且收发器电路中的第二接收器可以与第二端口相关联。电子设备可以在单个接收机模式中操作，其中只有一个接收器有效地节省功率或双接收机模式，其中可以并行地接收来自两个天线的信号以比较天线性能。基于天线性能度量，电子设备可以调整开关电路以确保正在使用最佳天线。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式