公开(公告)号：US09753884B2

公开(公告)日：2017-09-05

申请号：US12571188

申请日：2009-09-30

申请人： Kun Tan ,  Jiansong Zhang ,  Yongguang Zhang

发明人： Kun Tan ,  Jiansong Zhang ,  Yongguang Zhang

IPC分类号： G06F13/42 ,  G06F13/40 ,  G06F13/38 ,  H04B1/00

CPC分类号： G06F13/4273 ,  G06F13/38 ,  G06F13/40 ,  H04B1/0007

摘要： A radio control board exchanges data with a radio frequency (RF) front end using a messaging protocol over an interface that includes separate data and control channels. Training data can also be passed over the interface for tuning the clock phase.

公开(公告)号：US20110136439A1

公开(公告)日：2011-06-09

申请号：US12631548

申请日：2009-12-04

申请人： Kun Tan ,  Jiansong Zhang ,  Yongguang Zhang

发明人： Kun Tan ,  Jiansong Zhang ,  Yongguang Zhang

IPC分类号： H04B17/00 ,  H04M3/00 ,  G06F13/14 ,  G06F3/00

CPC分类号： H04W24/08

摘要： An analysis application is adapted to be executed on a computing device for collecting data for analysis from a software-defined radio implemented on the same computing device or on a separate computing device for testing measurement and analysis of wireless standards, radio configurations, communication protocols and other radio technologies.

摘要翻译： 分析应用适于在计算设备上执行，用于从在相同的计算设备上实现的软件定义的无线电收集数据或者在用于测试无线标准，无线电配置，通信协议的测量和分析的单独的计算设备上收集用于分析的数据， 其他无线电技术。

公开(公告)号：US20080279092A1

公开(公告)日：2008-11-13

申请号：US11801785

申请日：2007-05-11

申请人： Amer A. Hassan ,  Bernard D. Aboba ,  Kun Tan ,  Jiansong Zhang

发明人： Amer A. Hassan ,  Bernard D. Aboba ,  Kun Tan ,  Jiansong Zhang

IPC分类号： G06F11/00

CPC分类号： H04L1/002 ,  H04L1/0002 ,  H04L1/0009 ,  H04L1/0021 ,  H04L1/203

摘要： A computing device configured for wireless communication may effectively control adaptation to channel conditions. The device may be configured to identify and classify conditions impacting performance of a channel so that appropriate adaptations may be made. Interference may be detected by correlating received signal strength and packet errors. High received signal strength correlated to a high packet error rate may signify presence of a source of interference. Once a source of interference is detected, other criteria may be used to determine the nature of the interference so that an adaptation that is minimally disruptive of applications can be selected. Additionally, channel degradation may be predicted by monitoring trends in error rates, including Forward Error Correction rates, and adaptation may be used before packet error rates exceed an unacceptable level.

摘要翻译： 配置用于无线通信的计算设备可以有效地控制对信道条件的适配。 该设备可以被配置为识别和分类影响信道性能的条件，以便进行适当的调整。 可以通过将接收的信号强度和分组错误相关联来检测干扰。 与高分组错误率相关的高接收信号强度可能意味着存在干扰源。 一旦检测到干扰源，可以使用其他标准来确定干扰的性质，从而可以选择最小程度地破坏应用的适配。 另外，可以通过监视错误率的趋势（包括前向纠错率）来预测信道恶化，并且可以在分组错误率超过不可接受的水平之前使用适配。

公开(公告)号：US08989286B2

公开(公告)日：2015-03-24

申请号：US13294093

申请日：2011-11-10

申请人： Yong He ,  Kun Tan ,  Haichen Shen ,  Jiansong Zhang ,  Yongguang Zhang

发明人： Yong He ,  Kun Tan ,  Haichen Shen ,  Jiansong Zhang ,  Yongguang Zhang

IPC分类号： H04K1/00 ,  H04B7/24 ,  H04L5/00 ,  H04L27/00 ,  H04W72/00 ,  H04L27/26

CPC分类号： H04B7/24 ,  H04L5/0044 ,  H04L27/0006 ,  H04L27/2636 ,  H04W72/00 ,  Y02D70/00

摘要： Embodiments include processes, systems, and devices for reshaping virtual baseband signals for transmission on non-contiguous and variable portions of a physical baseband, such as a white space frequency band. In the transmission path, a spectrum virtualization layer maps a plurality of transmission components associated with a transmission symbol produced by a physical layer protocol to sub-carriers of the allocated physical frequency band. The spectrum virtualization layer then outputs a physical transmission symbol composed of time-domain samples derived from the mapped frequency components and a cyclic prefix. In the receive path, a time-domain symbol received on the physical baseband is reshaped and equalized by the virtual spectrum layer in order to recompose a time-domain samples of a transmission stream in the virtual baseband.

摘要翻译： 实施例包括用于重构虚拟基带信号以用于在诸如空白频带的物理基带的非连续和可变部分上传输的过程，系统和设备。 在传输路径中，频谱虚拟化层将与由物理层协议产生的传输符号相关联的多个传输组件映射到所分配的物理频带的子载波。 然后，频谱虚拟化层输出由映射的频率分量导出的时域样本和循环前缀组成的物理传输符号。 在接收路径中，在物理基带上接收​​的时域符号由虚拟频谱层重新整形和均衡，以便重构虚拟基带中的传输流的时域采样。

公开(公告)号：US08948282B2

公开(公告)日：2015-02-03

申请号：US13294093

申请日：2011-11-10

申请人： Yong He ,  Kun Tan ,  Haichen Shen ,  Jiansong Zhang ,  Yongguang Zhang

发明人： Yong He ,  Kun Tan ,  Haichen Shen ,  Jiansong Zhang ,  Yongguang Zhang

IPC分类号： H04K1/00 ,  H04B7/24 ,  H04L5/00 ,  H04L27/00 ,  H04W72/00 ,  H04L27/26

摘要： Embodiments include processes, systems, and devices for reshaping virtual baseband signals for transmission on non-contiguous and variable portions of a physical baseband, such as a white space frequency band. In the transmission path, a spectrum virtualization layer maps a plurality of transmission components associated with a transmission symbol produced by a physical layer protocol to sub-carriers of the allocated physical frequency band. The spectrum virtualization layer then outputs a physical transmission symbol composed of time-domain samples derived from the mapped frequency components and a cyclic prefix. In the receive path, a time-domain symbol received on the physical baseband is reshaped and equalized by the virtual spectrum layer in order to recompose a time-domain samples of a transmission stream in the virtual baseband.

公开(公告)号：US08929933B2

公开(公告)日：2015-01-06

申请号：US13202297

申请日：2011-05-04

申请人： Kun Tan ,  Jiansong Zhang ,  Yongguang Zhang ,  Ranveer Chandra ,  Yong He ,  Thomas Moscibroda ,  Paramvir Bahl ,  Haichen Shen

发明人： Kun Tan ,  Jiansong Zhang ,  Yongguang Zhang ,  Ranveer Chandra ,  Yong He ,  Thomas Moscibroda ,  Paramvir Bahl ,  Haichen Shen

IPC分类号： H04B15/00 ,  H04W88/08 ,  H04L5/00 ,  H04W72/08 ,  H04W72/04 ,  H04W16/14 ,  H04L27/00

CPC分类号： H04W72/0453 ,  H04L5/0005 ,  H04L5/0023 ,  H04L5/0064 ,  H04L5/0066 ,  H04L5/0092 ,  H04L5/14 ,  H04L27/0006 ,  H04W16/14 ,  H04W72/0446 ,  H04W72/082 ,  H04W88/08

摘要： Embodiments include processes, systems, and devices that allow a white space base station to request available frequency ranges for white space transmission in a local area. A white space finder service models a primary user device's transmission signal propagation area using terrain data associated with the local area of the primary user device. The white space finder service also determines, based on the location of the white space base station and the modeled propagation area, one or more locally available, non-interfering frequency ranges and provides them to the white space base station. The white space base station compares the provided frequency ranges to policies and selects one or more of the available frequencies that accommodate the policies. The white space base station also maps the transmission frequency ranges to virtual frequency ranges for transmission by a software-defined radio employing spectrum virtualization.

摘要翻译： 实施例包括允许空白基站在局部区域中为空白传输请求可用频率范围的过程，系统和设备。 白色空间查找器服务使用与主用户设备的本地区域相关联的地形数据来建模主用户设备的传输信号传播区域。 白色空间查找器服务还基于白色空间基站的位置和建模的传播区域确定一个或多个本地可用的非干扰频率范围并将其提供给空白基站。 空白基站将提供的频率范围与策略进行比较，并选择适应策略的一个或多个可用频率。 白空间基站还将传输频率范围映射到虚拟频率范围，以便通过使用频谱虚拟化的软件定义无线电进行传输。

公开(公告)号：US20130122949A1

公开(公告)日：2013-05-16

申请号：US13294093

申请日：2011-11-10

申请人： Yong He ,  Kun Tan ,  Haichen Shen ,  Jiansong Zhang ,  Yongguang Zhang

发明人： Yong He ,  Kun Tan ,  Haichen Shen ,  Jiansong Zhang ,  Yongguang Zhang

IPC分类号： H04W72/04 ,  H04B7/24 ,  H04B17/00

CPC分类号： H04B7/24 ,  H04L5/0044 ,  H04L27/0006 ,  H04L27/2636 ,  H04W72/00 ,  Y02D70/00

摘要： Embodiments include processes, systems, and devices for reshaping virtual baseband signals for transmission on non-contiguous and variable portions of a physical baseband, such as a white space frequency band. In the transmission path, a spectrum virtualization layer maps a plurality of transmission components associated with a transmission symbol produced by a physical layer protocol to sub-carriers of the allocated physical frequency band. The spectrum virtualization layer then outputs a physical transmission symbol composed of time-domain samples derived from the mapped frequency components and a cyclic prefix. In the receive path, a time-domain symbol received on the physical baseband is reshaped and equalized by the virtual spectrum layer in order to recompose a time-domain samples of a transmission stream in the virtual baseband.

摘要翻译： 实施例包括用于重构虚拟基带信号以用于在诸如空白频带的物理基带的非连续和可变部分上传输的过程，系统和设备。 在传输路径中，频谱虚拟化层将与由物理层协议产生的传输符号相关联的多个传输组件映射到所分配的物理频带的子载波。 然后，频谱虚拟化层输出由映射的频率分量导出的时域样本和循环前缀组成的物理传输符号。 在接收路径中，在物理基带上接收​​的时域符号由虚拟频谱层重新整形和均衡，以便重构虚拟基带中的传输流的时域采样。

公开(公告)号：US08340062B2

公开(公告)日：2012-12-25

申请号：US12792677

申请日：2010-06-02

申请人： Kun Tan ,  Jiansong Zhang ,  Yongguang Zhang ,  He Liu ,  Ji Fang

发明人： Kun Tan ,  Jiansong Zhang ,  Yongguang Zhang ,  He Liu ,  Ji Fang

IPC分类号： H04L27/28

CPC分类号： H04L1/0045 ,  H04L1/208 ,  H04L25/03891

摘要： An uncontrolled spatial multiple access system and method facilitating spatial multiple access for multiple devices in a wireless local-area network (WLAN). Embodiments of the system and method increase throughput of the wireless network by facilitating concurrent encoded frame transmission. Decoding of the quasi-overlapped frames is achieved using a chain decoding technique that takes data streams (or signals) containing the quasi-overlapping encoded frames and isolates each encoded frame so that the frame can be decoded. Quasi-overlapped frames means that the frames are overlapped in the body of the frame but not at the preamble (or headers) of the frames. Embodiments of the chain decoding also use interference nullifying and interference cancellation to enable concurrent quasi-overlapping transmission. A carrier counting multiple access technique of embodiments of the system and method allow wireless networks to retain their asynchronous nature while supporting spatial multiple access and maintain backwards compatibility with the IEEE 802.11 standard.

摘要翻译： 一种不受控制的空间多址系统和方法，其促进无线局域网（WLAN）中的多个设备的空间多址接入。 该系统和方法的实施例通过促进并发编码的帧传输来增加无线网络的吞吐量。 使用链式解码技术来实现准重叠帧的解码，链路解码技术获取包含准重叠编码帧的数据流（或信号），并隔离每个编码帧，使得帧可以被解码。 准重叠帧意味着帧在帧的主体中重叠，但不在帧的前导码（或报头）处。 链路解码的实施例还使用干扰无效和干扰消除来实现并行准重叠传输。 计算系统和方法的实施例的多址接入技术的载波允许无线网络保持其异步性质，同时支持空间多址并保持与IEEE 802.11标准的向后兼容性。

公开(公告)号：US20120127914A1

公开(公告)日：2012-05-24

申请号：US12952063

申请日：2010-11-22

申请人： Kun Tan ,  Jiansong Zhang ,  Yongguang Zhang ,  Ji-hoon Ryoo ,  Ji Fang

发明人： Kun Tan ,  Jiansong Zhang ,  Yongguang Zhang ,  Ji-hoon Ryoo ,  Ji Fang

IPC分类号： H04B7/14

CPC分类号： H04B7/15521 ,  H04B7/14 ,  H04B7/15 ,  H04B7/15528 ,  H04B7/15592

摘要： Techniques and systems that improve throughput between a pair of nodes by using two multi-hop paths of one-way flows regardless of the one-way flows interfering with each other are described herein. These techniques enable nearly full-rate data flow through frame transmissions, even though these frame transmissions can interfere with substantially concurrent relay transmissions. In some implementations, relays on the two paths forward mixed frame signals to the next hop without trying to decode the mixed frame signals of interfered frames. The destination successfully recovers the useful information from the mixed frame signals by canceling out interference based on previously received frames.

摘要翻译： 这里描述了通过使用单向流的两个多跳路径来改善一对节点之间的吞吐量的技术和系统，而不管彼此干扰的单向流。 即使这些帧传输可能干扰基本上并发的中继传输，这些技术使得能够通过帧传输几乎全速率数据流。 在一些实施方式中，两个路径上的中继器将混合帧信号转发到下一跳，而不尝试对被干扰帧的混合帧信号进行解码。 目的地通过基于先前接收到的帧来消除干扰，从混合帧信号成功地恢复有用信息。

公开(公告)号：US20110299612A1

公开(公告)日：2011-12-08

申请号：US12792677

申请日：2010-06-02

申请人： Kun Tan ,  Jiansong Zhang ,  Yongguang Zhang ,  He Liu ,  Ji Fang

发明人： Kun Tan ,  Jiansong Zhang ,  Yongguang Zhang ,  He Liu ,  Ji Fang

IPC分类号： H04L27/28

CPC分类号： H04L1/0045 ,  H04L1/208 ,  H04L25/03891

摘要： An uncontrolled spatial multiple access system and method facilitating spatial multiple access for multiple devices in a wireless local-area network (WLAN). Embodiments of the system and method increase throughput of the wireless network by facilitating concurrent encoded frame transmission. Decoding of the quasi-overlapped frames is achieved using a chain decoding technique that takes data streams (or signals) containing the quasi-overlapping encoded frames and isolates each encoded frame so that the frame can be decoded. Quasi-overlapped frames means that the frames are overlapped in the body of the frame but not at the preamble (or headers) of the frames. Embodiments of the chain decoding also use interference nullifying and interference cancelation to enable concurrent quasi-overlapping transmission. A carrier counting multiple access technique of embodiments of the system and method allow wireless networks to retain their asynchronous nature while supporting spatial multiple access and maintain backwards compatibility with the IEEE 802.11 standard.

摘要翻译： 一种不受控制的空间多址系统和方法，其促进无线局域网（WLAN）中的多个设备的空间多址接入。 该系统和方法的实施例通过促进并发编码的帧传输来提高无线网络的吞吐量。 使用链式解码技术来实现准重叠帧的解码，链路解码技术获取包含准重叠编码帧的数据流（或信号），并隔离每个编码帧，使得帧可以被解码。 准重叠帧意味着帧在帧的主体中重叠，但不在帧的前导码（或报头）处。 链路解码的实施例还使用干扰无效和干扰消除来实现并行准重叠传输。 计算系统和方法的实施例的多址接入技术的载波允许无线网络保持其异步性质，同时支持空间多址并保持与IEEE 802.11标准的向后兼容性。