公开(公告)号：US06799294B1

公开(公告)日：2004-09-28

申请号：US09716558

申请日：2000-11-20

申请人： Sae-Young Chung ,  Hui-Ling Lou

发明人： Sae-Young Chung ,  Hui-Ling Lou

IPC分类号： H03M1303

CPC分类号： H04L1/0082 ,  H04L1/0054

摘要： Error flags are generated for use in source decoding of a source-coded bit stream transmitted through a channel of a communication system. The source-coded bit stream is channel coded using at least one channel code, and the channel code is decoded in a soft-decision channel decoder to generate a received version of the source-coded bit stream and one or more reliability measures associated with a designated portion of the received version of the source-coded bit stream. The reliability measures are processed to generate one or more error flags indicative of the presence of an error in the corresponding portion of the received version of the source-coded bit stream. The invention allows different detection capabilities to be used for different portions of the received version of the source-coded bit stream, and further allows these detection capabilities to be changed dynamically at the receiver. The error flags may be used to trigger an error mitigation/concealment algorithm in the source decoder. Advantageously, the error flags can be matched to frames or subframes of the source-coded bit stream, such that the performance of the error mitigation/concealment algorithm is substantially improved relative to its performance when using error flags generated from a conventional outer block code.

摘要翻译： 生成错误标志用于通过通信系统的通道发送的源编码比特流的源解码。 源编码比特流使用至少一个信道码进行信道编码，并且在软判决信道解码器中解码信道码，以产生源编码比特流的接收版本和与 源编码比特流的接收版本的指定部分。 处理可靠性度量以产生指示在源编码比特流的接收版本的对应部分中存在错误的一个或多个错误标志。 本发明允许将不同的检测能力用于源编码比特流的接收版本的不同部分，并且还允许在接收机处动态地改变这些检测能力。 错误标志可用于触发源解码器中的错误减轻/隐藏算法。 有利地，错误标志可以与源编码比特流的帧或子帧匹配，使得当使用从常规外部块码产生的错误标志时，相对于其性能，误差减轻/隐藏算法的性能被显着改善。

公开(公告)号：US07190732B2

公开(公告)日：2007-03-13

申请号：US09765754

申请日：2001-01-19

申请人： Sae-Young Chung ,  Hui-Ling Lou

发明人： Sae-Young Chung ,  Hui-Ling Lou

IPC分类号： H04L23/02 ,  H03M13/00

CPC分类号： H04L1/0058 ,  H04L1/0041 ,  H04L1/0065 ,  H04L1/007

摘要： Techniques for multilevel coding of a stream of information bits in a communication system. The stream of information bits is separated into portions, and each of the portions is associated with a different level of the multilevel coding. At least one code is applied to the portion of the information bits of each level in a designated subset of the full set of levels, such that the portions of the information bits for levels in the designated subset are coded while the portions of the information bits for levels not in the designated subset are uncoded. Both the coded portions of the information bits and the uncoded portions of the information bits are used to select modulation symbols for transmission in the system. Advantageously, the invention provides improved coding gain relative to conventional techniques, and can be configured to provide unequal error protection as well as time diversity for transmissions in the system.

摘要翻译： 通信系统中信息比特流多级编码技术。 信息比特流被分成多个部分，并且每个部分与多级编码的不同级别相关联。 至少一个代码被应用于整个级别的指定子集中的每个级别的信息位的部分，使得指定子集中的级别的信息位的部分被编码，同时信息位的部分 对于未在指定子集中的级别未编码。 信息比特的编码部分和信息比特的未编码部分都用于选择用于在系统中传输的调制符号。 有利地，本发明相对于常规技术提供改进的编码增益，并且可以被配置为为系统中的传输提供不相等的错误保护以及时间分集。

公开(公告)号：US09924512B1

公开(公告)日：2018-03-20

申请号：US12730651

申请日：2010-03-24

申请人： Hongyuan Zhang ,  Rohit U. Nabar ,  Hui-Ling Lou

发明人： Hongyuan Zhang ,  Rohit U. Nabar ,  Hui-Ling Lou

IPC分类号： H04W4/00 ,  H04W72/04 ,  H04L5/00 ,  H04W84/12

CPC分类号： H04W72/0453 ,  H04L5/0007 ,  H04L5/003 ,  H04W84/12

摘要： A plurality of different orthogonal frequency division multiplexing (OFDM) sub-channel blocks are assigned to a plurality of devices including a first device and a second device. The plurality of OFDM sub-channel blocks includes a first OFDM sub-channel block assigned to the first device and a second OFDM sub-channel block assigned to the second device. Data for the first device and data for the second device are received. OFDM data units are generated, wherein data for the first device is modulated on sub-channels in the first OFDM sub-channel block and data for the second device is modulated on sub-channels in the second OFDM sub-channel block. At least one of the OFDM sub-channel blocks is formatted to substantially conform to a physical layer specification of a WLAN communication protocol having a maximum channel bandwidth smaller than a bandwidth of the generated OFDM data units.

公开(公告)号：US09124944B1

公开(公告)日：2015-09-01

申请号：US13292720

申请日：2011-11-09

申请人： Jihwan P. Choi ,  Hui-Ling Lou

发明人： Jihwan P. Choi ,  Hui-Ling Lou

IPC分类号： H04L12/28 ,  H04N21/6405 ,  H04J1/16 ,  H04L12/18

CPC分类号： H04N21/6405 ,  H04L12/1845 ,  H04L12/1877 ,  H04L12/1881

摘要： In a method for transmitting control signals in a multicast communication system, wherein the multicast communication system broadcasts one or more multicast channels, one or more occurrences of a first control signal are transmitted. The first control signal includes at least control information corresponding to the one or more multicast channels. Additionally, one or more occurrences of a second control signal are transmitted for each of the one or more multicast channels. The second control signal includes at least control information corresponding to the respective multicast channel. At least one transmission of an occurrence of the second control signal is synchronized with at least one transmission of an occurrence of the first control signal.

摘要翻译： 在多播通信系统中发送控制信号的方法中，其中多播通信系统广播一个或多个多播信道，发送一个或多个出现的第一控制信号。 第一控制信号至少包括与一个或多个多播信道相对应的控制信息。 另外，针对一个或多个多播信道中的每一个发送一个或多个出现的第二控制信号。 第二控制信号至少包括对应于各个多播信道的控制信息。 第二控制信号的发生的至少一次发送与第一控制信号的发生的至少一次发送同步。

公开(公告)号：US08996066B1

公开(公告)日：2015-03-31

申请号：US12363047

申请日：2009-01-30

申请人： Jungwon Lee ,  Hui-Ling Lou

发明人： Jungwon Lee ,  Hui-Ling Lou

IPC分类号： H04W16/28

CPC分类号： H04B7/0617 ,  H04B7/0626 ,  H04L25/0204 ,  H04L25/021 ,  H04L25/0244 ,  H04W16/28 ,  H04W72/046 ,  H04W72/082

摘要： Methods and apparatus are provided for directing a beam towards a receiving device in the presence of interference. A beam transmitted by a transmission source is received by a received device. The beam shape is affected by signals transmitted by interfering sources. The receiving device computes channel estimates associated with the transmission source and the interfering sources. A feedback signal that represents the channel estimates associated with the transmission and interfering sources is transmitted to the transmission source. The transmission source changes characteristics of the beam to compensate for the interference caused by the interfering sources. The transmission source may change the characteristics of the beam by performing precoding algorithms.

摘要翻译： 提供了用于在存在干扰的情况下将光束引向接收装置的方法和装置。 由发送源发送的波束由接收的设备接收。 光束形状受干扰源发射的信号的影响。 接收设备计算与传输源和干扰源相关联的信道估计。 表示与传输和干扰源相关联的信道估计的反馈信号被传送到传输源。 传输源改变光束的特性以补偿由干扰源造成的干扰。 传输源可以通过执行预编码算法来改变波束的特性。

公开(公告)号：US08964789B1

公开(公告)日：2015-02-24

申请号：US12609862

申请日：2009-10-30

申请人： Jungwon Lee ,  Jiwoong Choi ,  Qing Zhao ,  Hui-Ling Lou

发明人： Jungwon Lee ,  Jiwoong Choi ,  Qing Zhao ,  Hui-Ling Lou

IPC分类号： H04J3/06

CPC分类号： H04L27/2643 ,  H04L7/042 ,  H04L27/2613 ,  H04L27/2656 ,  H04L2027/0026

摘要： Methods and apparatus for data synchronization in communication systems using repetitive preamble patterns. In one embodiment, a method includes receiving a signal, where the received signal includes a data unit. The data unit includes a preamble symbol, and the preamble symbol has a start time and includes Q portions, each having the same pattern. The method further includes determining multiple possible values of a frame timing (FT). The method further includes determining multiple correlation functions including at least one correlation function corresponding to each of the multiple possible values of the FT, such that a given correlation function corresponding to a given possible value of the FT represents a correlation between data in two non-adjacent portions of the Q portions associated with the given FT. The method further includes selecting one of the multiple possible values of the FT based at least in part on the multiple determined correlation functions.

摘要翻译： 使用重复前导码模式的通信系统中的数据同步的方法和装置。 在一个实施例中，一种方法包括接收信号，其中所接收的信号包括数据单元。 数据单元包括前导符号，并且前导码符号具有开始时间，并且包括各自具有相同模式的Q个部分。 该方法还包括确定帧定时（FT）的多个可能值。 该方法还包括确定包括与FT的多个可能值中的每一个相对应的至少一个相关函数的多个相关函数，使得对应于FT的给定可能值的给定相关函数表示两个非可变值中的数据之间的相关性， 与给定FT相关联的Q部分的相邻部分。 该方法还包括至少部分地基于多个确定的相关函数来选择FT的多个可能值中的一个。

公开(公告)号：US08897394B1

公开(公告)日：2014-11-25

申请号：US12400442

申请日：2009-03-09

申请人： Rohit U. Nabar ,  Hongyuan Zhang ,  Arul Durai Murugan Palanivelu ,  Hui-Ling Lou ,  Songping Wu

发明人： Rohit U. Nabar ,  Hongyuan Zhang ,  Arul Durai Murugan Palanivelu ,  Hui-Ling Lou ,  Songping Wu

IPC分类号： H03K9/00

CPC分类号： H04W72/085 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0028 ,  H04L5/0069 ,  H04L5/0085 ,  H04L25/0204 ,  H04L25/0228 ,  H04L27/0008 ,  H04L27/261 ,  H04W24/10 ,  H04W88/06

摘要： Methods and apparatus are provided for adaptively selecting a communications mode in high frequency systems. A first dual-mode device having capabilities of using two or more high frequency communications modes, such as OFDM and SC modulation, may transmit a signal to a second dual-mode device with the same capabilities. The second dual-mode device may compute a channel characteristic associated with a high frequency communications channel and select an optimal high frequency communications mode. The second dual-mode device may transmit information indicative of the channel characteristic or the selected communications mode to the first dual-mode device. The first dual-mode device may select and operate using the optimal high frequency communications mode based on the information received from the second dual-mode device. The first and second dual-mode devices may communicate using the selected high frequency communications mode.

摘要翻译： 提供了用于在高频系统中自适应地选择通信模式的方法和装置。 具有使用诸如OFDM和SC调制之类的两个或多个高频通信模式的能力的第一双模设备可以将信号发送到具有相同能力的第二双模设备。 第二双模设备可以计算与高频通信信道相关联的信道特性，并选择最佳高频通信模式。 第二双模设备可以向第一双模设备发送指示信道特性或所选通信模式的信息。 第一双模设备可以基于从第二双模设备接收的信息，使用最佳高频通信模式来选择和操作。 第一和第二双模式设备可以使用所选择的高频通信模式进行通信。

公开(公告)号：US08879999B2

公开(公告)日：2014-11-04

申请号：US13611174

申请日：2012-09-12

申请人： Ying Cai ,  Jihwan P. Choi ,  Hui-Ling Lou ,  Vladan Petrovic ,  Chuxiang Li

发明人： Ying Cai ,  Jihwan P. Choi ,  Hui-Ling Lou ,  Vladan Petrovic ,  Chuxiang Li

IPC分类号： H04B1/00 ,  H04W72/08 ,  H04B1/40 ,  H04W88/06 ,  H04B1/10

CPC分类号： H04B1/406 ,  H04B1/109 ,  H04W72/082 ,  H04W88/06

摘要： Apparatus having corresponding methods and computer-readable media comprise: a first transceiver comprising a controller configured to select one of a plurality of frequency regions, and a transmitter configured to transmit, according to a first protocol, first wireless signals in the one of the plurality of the frequency regions selected by the controller, wherein each frequency region is characterized by a respective type of unwanted interference generated responsive to the transmitter transmitting the first wireless signals in the respective frequency region; an arbiter configured to select one or more frequency channels based on the one of the plurality of the frequency regions selected by the controller; and a second transceiver configured to transceive, according to a second protocol, second wireless signals only in the one or more frequency channels selected by the arbiter.

摘要翻译： 具有相应方法和计算机可读介质的装置包括：第一收发器，包括被配置为选择多个频率区域中的一个的控制器，以及被配置为根据第一协议传输多个频率区域中的一个的第一无线信号的发射机 其中每个频率区域的特征在于响应于在相应频率区域中发送第一无线信号的发射机而产生的相应类型的不需要的干扰; 配置为基于由控制器选择的多个频率区域中的一个选择一个或多个频率信道的仲裁器; 以及第二收发机，其被配置为仅在所述仲裁器选择的所述一个或多个频率信道中收发根据第二协议的第二无线信号。

公开(公告)号：US08817912B1

公开(公告)日：2014-08-26

申请号：US13274401

申请日：2011-10-17

申请人： Songping Wu ,  Hui-Ling Lou

发明人： Songping Wu ,  Hui-Ling Lou

IPC分类号： H04L27/20

CPC分类号： H04L27/206 ,  H04L27/3411

摘要： Systems, methods, and other embodiments associated with phase-rotated tone-grouping modulation are described. According to one embodiment, an apparatus includes a parser configured to reposition bits of at least a portion of a data word. An encoder configured to, from the repositioned bits, form i) a tone grouping and ii) a copy of the tone grouping. The apparatus also includes a modulator configured to modulate the tone grouping and the copy of the tone grouping.

摘要翻译： 描述了与相位旋转色调组调制相关联的系统，方法和其他实施例。 根据一个实施例，一种装置包括被配置为重新定位数据字的至少一部分的位的解析器。 配置成从重新定位的位形成i）音调分组的编码器，和ii）音调分组的副本。 该装置还包括调制器，用于调制音调分组和音调分组的副本。

公开(公告)号：US08792598B1

公开(公告)日：2014-07-29

申请号：US13565228

申请日：2012-08-02

申请人： Raphael Cendrillon ,  Hui-Ling Lou

发明人： Raphael Cendrillon ,  Hui-Ling Lou

IPC分类号： H04B1/10

CPC分类号： H04B1/109 ,  H04B1/406 ,  H04B1/525

摘要： A method of mitigating interference from a transmitter of a communication device at a receiver of the same communication device, where the communication device operates according to at least a first and a second communication protocol, includes generating, in the transmitter, a transmit signal conforming to the second communication protocol, generating an interference estimate signal from the transmit signal using an adaptive filter, and receiving a receive signal at the receiver. The receive signal includes a desired component conforming to the first communication protocol and an interference component corresponding to the transmit signal. The method also includes processing the receive signal using the interference estimate signal to remove at least a portion of the interference component from the receive signal.

摘要翻译： 一种减轻来自同一通信设备的接收机的通信设备的发射机的干扰的方法，其中通信设备根据至少第一和第二通信协议进行操作，包括在发射机中产生符合 第二通信协议，使用自适应滤波器从发送信号生成干扰估计信号，以及在接收机处接收接收信号。 接收信号包括符合第一通信协议的期望分量和对应于发射信号的干扰分量。 该方法还包括使用干扰估计信号来处理接收信号，以从接收信号中去除干扰分量的至少一部分。