公开(公告)号：US09130711B2

公开(公告)日：2015-09-08

申请号：US13294039

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： H04L12/28 ,  H04L5/00 ,  H04L27/00 ,  H04L27/26 ,  H04J1/16

CPC分类号： H04L5/0041 ,  H04L5/0044 ,  H04L27/0006 ,  H04L27/2636

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 frequency components derived from 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 time-domain signal derived from the mapped frequency components. In the receive path, a time-domain signal received on the physical baseband is reshaped by the virtual spectrum layer in order to recompose a time-domain symbol 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，频谱虚拟化层将从由物理层协议产生的传输符号导出的多个频率分量映射到所分配的物理频带的子载波。 然后，频谱虚拟化层输出从映射的频率分量导出的时域信号。 在接收路径中，在物理基带上接收​​的时域信号由虚拟频谱层重新形成，以便重构虚拟基带中的时域符号。

公开(公告)号：US20140241157A1

公开(公告)日：2014-08-28

申请号：US13571010

申请日：2012-08-09

申请人： Kun Tan ,  Wenjun Hu ,  Guohan Lv ,  Yongguang Zhang

发明人： Kun Tan ,  Wenjun Hu ,  Guohan Lv ,  Yongguang Zhang

IPC分类号： H04W28/08 ,  H04W88/08 ,  H04W56/00 ,  H04L5/00

CPC分类号： H04W28/08 ,  H04J3/0638 ,  H04J3/0661 ,  H04L5/0037 ,  H04W56/00 ,  H04W88/08 ,  H04W88/085

摘要： An extended wireless access point may have many distributed radio units connected to associated processing units via a radio transmission network comprising commodity switches controlled by one or more network controllers. The one or more network controllers may use a load balancing algorithm to select a processing unit to process a signal received by a distributed radio unit. The radio units may receive a wireless signal, and generate compressed samples of the wireless signal for transport via the radio transmission network and processing by a selected processing unit. Similarly, a processing unit may generate and transmit via the radio transmission network compressed samples for decompression and transmission by a radio unit.

摘要翻译： 扩展无线接入点可以具有许多分布式无线电单元，其经由包括由一个或多个网络控制器控制的商业交换机的无线电传输网络连接到相关处理单元。 一个或多个网络控制器可以使用负载平衡算法来选择处理单元来处理由分布式无线电单元接收的信号。 无线电单元可以接收无线信号，并生成无线信号的压缩样本，用于经由无线电传输网络传输和由选定的处理单元进行处理。 类似地，处理单元可以经由无线电传输网络生成并发送压缩样本以进行解压缩和由无线电单元传输。

公开(公告)号：US20140044038A1

公开(公告)日：2014-02-13

申请号：US13572912

申请日：2012-08-13

申请人： Jiansong Zhang ,  Kun Tan ,  Yongguang Zhang ,  Ranveer Chandra

发明人： Jiansong Zhang ,  Kun Tan ,  Yongguang Zhang ,  Ranveer Chandra

IPC分类号： H04W4/00

CPC分类号： H04L1/1854 ,  H04L1/1887 ,  H04L1/1893

摘要： Implementations for retransmitting erroneous portions within a transmission frame are described. A sender transmits a transmission frame and the receiver performs error detection on portions of the transmission frame in order to determine if any are received in error. The receiver sets up a feedback channel and transmits acknowledgements to the receiver to indicate that one or more portions have been received and to identify any portions that are received with errors. At least some of the acknowledgements are transmitted prior to receipt of the entire transmission frame. The sender retransmits any portions that are identified as being erroneous within the transmission frame.

摘要翻译： 描述用于在传输帧内重传错误部分的实现。 发送方发送传输帧，并且接收机对传输帧的部分执行错误检测，以便确定是否有错误。 接收机建立反馈信道并且向接收机发送确认以指示已经接收到一个或多个部分并且识别任何被错误接收的部分。 在接收到整个传输帧之前至少发送一些确认。 发送方重传发送帧内被识别为错误的任何部分。

公开(公告)号：US08627189B2

公开(公告)日：2014-01-07

申请号：US12630774

申请日：2009-12-03

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

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

IPC分类号： G06F11/00

CPC分类号： H04L1/0054 ,  H03M13/23 ,  H03M13/41 ,  H03M13/4169 ,  H03M13/6527 ,  H04B1/0039 ,  H04L1/0043 ,  H04L1/0052 ,  H04L1/0066 ,  H04L1/1607 ,  H04L1/1829

摘要： An extensive use of look-up table (LUT) and single instruction multiple data (SIMD) in different algorithms in a software-defined radio (SDR) system is described. In particular, the LUT is used during spreading modulation, mapping and spreading, scrambling, de-scrambling, soft demapping, and the like. The SIMD is executed by a multi-core processor during implementation of a “min” operation to find an optimal path in a Trellis diagram for a Viterbi decoder.

摘要翻译： 描述了在软件定义无线电（SDR）系统中在不同算法中广泛使用查找表（LUT）和单指令多数据（SIMD）。 特别地，LUT在扩展调制，映射和扩展，加扰，去加扰，软解映射等期间被使用。 在执行“最小”操作期间，SIMD由多核处理器执行以在维特比解码器的网格图中找到最佳路径。

公开(公告)号：US20130121257A1

公开(公告)日：2013-05-16

申请号：US13294039

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

CPC分类号： H04L5/0041 ,  H04L5/0044 ,  H04L27/0006 ,  H04L27/2636

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 frequency components derived from 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 time-domain signal derived from the mapped frequency components. In the receive path, a time-domain signal received on the physical baseband is reshaped by the virtual spectrum layer in order to recompose a time-domain symbol 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，频谱虚拟化层将从由物理层协议产生的传输符号导出的多个频率分量映射到所分配的物理频带的子载波。 然后，频谱虚拟化层输出从映射的频率分量导出的时域信号。 在接收路径中，在物理基带上接收​​的时域信号由虚拟频谱层重新形成，以便重构虚拟基带中的时域符号。

公开(公告)号：US20110138259A1

公开(公告)日：2011-06-09

申请号：US12630774

申请日：2009-12-03

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

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

IPC分类号： H03M13/25 ,  H03M13/41 ,  G06F11/10

CPC分类号： H04L1/0054 ,  H03M13/23 ,  H03M13/41 ,  H03M13/4169 ,  H03M13/6527 ,  H04B1/0039 ,  H04L1/0043 ,  H04L1/0052 ,  H04L1/0066 ,  H04L1/1607 ,  H04L1/1829

摘要： An extensive use of look-up table (LUT) and single instruction multiple data (SIMD) in different algorithms in a software-defined radio (SDR) system is described. In particular, the LUT is used during spreading modulation, mapping and spreading, scrambling, de-scrambling, soft demapping, and the like. The SIMD is executed by a multi-core processor during implementation of a “min” operation to find an optimal path in a Trellis diagram for a Viterbi decoder.

摘要翻译： 描述了在软件定义无线电（SDR）系统中在不同算法中广泛使用查找表（LUT）和单指令多数据（SIMD）。 特别地，LUT在扩展调制，映射和扩展，加扰，去加扰，软解映射等期间被使用。 在执行“最小”操作期间，SIMD由多核处理器执行以在维特比解码器的网格图中找到最佳路径。

公开(公告)号：US20110035522A1

公开(公告)日：2011-02-10

申请号：US12535415

申请日：2009-08-04

申请人： Kun Tan ,  Jiansong Zhang ,  Yongguang Zhang

发明人： Kun Tan ,  Jiansong Zhang ,  Yongguang Zhang

IPC分类号： G06F13/00 ,  H04L27/00 ,  G06F12/00

CPC分类号： G06F13/28

摘要： A radio control board passes a plurality of digital samples between a memory of a computing device and a radio frequency (RF) transceiver coupled to a system bus of the computing device. Processing of the digital samples is carried out one or more cores of a multi-core processor to implement a software-defined radio.

摘要翻译： 无线电控制板在计算设备的存储器与耦合到计算设备的系统总线的射频（RF）收发器之间传递多个数字样本。 数字样本的处理由多核处理器的一个或多个核进行，以实现软件定义的无线电。

公开(公告)号：US20100172274A1

公开(公告)日：2010-07-08

申请号：US12349520

申请日：2009-01-07

申请人： Haitao Wu ,  Kun Tan ,  Yongguang Zhang

发明人： Haitao Wu ,  Kun Tan ,  Yongguang Zhang

IPC分类号： G08C17/00

CPC分类号： H04W48/16 ,  Y02D70/122 ,  Y02D70/124 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/164

摘要： Described is a technology in which a Wi-Fi enabled mobile computing device conserves power by only selectively scanning to discover a potential access point for connecting. In one aspect, a cellular footprint, comprising the cellular tower identifier(s) and corresponding signal strength information, determines whether to perform or delay the Wi-Fi scan. The footprint may be used to detect mobile user location changes and compare with history, so as to delay scanning when the device has not sufficiently moved, or delay scanning when the history indicates little chance of a successful discovery/connection at the current location.

摘要翻译： 描述了一种技术，其中支持Wi-Fi的移动计算设备通过仅选择性地扫描以发现用于连接的潜在接入点来节省功率。 在一个方面，包括蜂窝塔标识符和对应的信号强度信息的蜂窝覆盖区确定是否执行或延迟Wi-Fi扫描。 可以使用足迹来检测移动用户位置变化并与历史进行比较，以便当设备没有充分移动时延迟扫描，或者当历史表示在当前位置成功发现/连接几率很小时延迟扫描。

公开(公告)号：US07861275B1

公开(公告)日：2010-12-28

申请号：US09536276

申请日：2000-03-27

申请人： Asha Vellaikal ,  Yongguang Zhang ,  Son K. Dao

发明人： Asha Vellaikal ,  Yongguang Zhang ,  Son K. Dao

IPC分类号： H04N7/173

CPC分类号： H04N21/4725 ,  H04N7/17318 ,  H04N21/234318 ,  H04N21/4622 ,  H04N21/4782 ,  H04N21/4788 ,  H04N21/6143 ,  H04N21/6175 ,  H04N21/6377 ,  H04N21/8583

摘要： A system and method for producing and receiving interactive broadcasting having a broadcast signal with a hypermedia channel and a logical multicast data channel. The logical multicast data channel has a broadcast signal markup stream (BSMS). The system users have a receiver with an interactivity module and a communication module. The BSMS allows user selectable objects to be displayed to users of the system. BSMS objects can be generated by combining speech recognition, language (and optionally video) processing, and keyword searches. By selecting objects various information relating to those objects may be displayed to users. A portion of the logical multicast channel may be employed to provide interactivity between users. A variation eliminates the BSMS either by employing a markup stream server to provide access links or by generating link content directly in the receiver by the same process.

摘要翻译： 一种用于产生和接收具有超媒体信道和逻辑多播数据信道的广播信号的交互式广播的系统和方法。 逻辑多播数据信道具有广播信号标记流（BSMS）。 系统用户具有具有交互模块和通信模块的接收器。 BSMS允许用户可选择的对象显示给系统的用户。 BSMS对象可以通过组合语音识别，语言（和可选的视频）处理和关键字搜索来生成。 通过选择对象，可以向用户显示与这些对象有关的各种信息。 可以采用逻辑多播信道的一部分来提供用户之间的交互性。 变体消除了BSMS，即通过采用标记流服务器来提供接入链路，或者通过相同的过程在接收机中直接生成链路内容。

公开(公告)号：US20090323784A1

公开(公告)日：2009-12-31

申请号：US12147480

申请日：2008-06-27

申请人： Francois Depienne ,  Fan Yang ,  Yuankai Ge ,  Yongguang Zhang

发明人： Francois Depienne ,  Fan Yang ,  Yuankai Ge ,  Yongguang Zhang

IPC分类号： H04B1/38

CPC分类号： H04H20/61 ,  H04H60/80 ,  H04W4/18 ,  H04W88/02

摘要： Described is using a graphic processing unit (GPU) as a programming platform to implement radio communication technologies. A software defined radio platform is implemented via a graphics processing unit (GPU). The GPU includes modules, corresponding to kernels, that process an incoming bitstream (e.g., from a CPU) into baseband signals for output by radio frequency hardware. Example modules include a PLCP module, a scrambler, an encoder, a puncturer, an interleaver, a mapper, a pilot insertion module, an OFDM module, and cyclic prefix and/or windowing modules. Other example modules/kernels convert a received baseband signal into a bitstream for consumption by a CPU or the like. In one example, an IEEE 802.11a transceiver is operated by the GPU-based software defined radio platform.

摘要翻译： 描述的是使用图形处理单元（GPU）作为编程平台来实现无线电通信技术。 软件定义的无线电平台通过图形处理单元（GPU）来实现。 GPU包括对应于内核的模块，其将输入比特流（例如，从CPU）处理成基带信号以由射频硬件输出。 示例模块包括PLCP模块，扰码器，编码器，穿孔器，交织器，映射器，导频插入模块，OFDM模块以及循环前缀和/或开窗模块。 其他示例性模块/内核将接收的基带信号转换为比特流以供CPU等等使用。 在一个示例中，IEEE 802.11a收发器由基于GPU的软件定义的无线电平台操作。