公开(公告)号：US06212654B1

公开(公告)日：2001-04-03

申请号：US08898441

申请日：1997-07-22

申请人： Hui-Ling Lou ,  Carl-Erik Wilhelm Sundberg

发明人： Hui-Ling Lou ,  Carl-Erik Wilhelm Sundberg

IPC分类号： G06F1100

CPC分类号： H03M13/6505 ,  G11C7/1006 ,  G11C27/00 ,  H03M13/05 ,  H03M13/23 ,  H03M13/25 ,  H03M13/41 ,  H03M13/413

摘要： Digital data is stored in an analog memory device using coded modulation techniques. The memory device includes a number of memory cells, each capable of storing one of a number of different levels. A given set of b information bits to be stored in the memory device is first coded in a convolutional or block coder to generate a set of coded bits which includes more than b bits. The set of coded bits is then mapped to one or more corresponding levels, and the one or more levels are each stored in a separate cell of the memory device. In a one-dimensional embodiment, the coding may involve applying a rate 1/2 convolutional code to i least significant bits, i=1, 2, . . . , and mapping the resulting b+i coded bits to one of 2b+i distinct levels in a one-dimensional AM signal set. In embodiments of the invention which utilize multidimensional signal sets, a given set of bits is mapped to a signal in an m-dimensional signal set, with or without coding of the bits, and each of the m dimensions of the selected signal is then stored as a level in a separate cell of the analog memory device. The invention increases the storage capacity of the memory device for a given readout error probability, or alternatively improves the error probability for a given storage capacity. Readout performance may be further improved by using a multiple read-and-sum unit to generate a readout value for a given stored level based on a sum or average of several different readouts of the stored level.

摘要翻译： 使用编码调制技术将数字数据存储在模拟存储装置中。 存储器件包括多个存储器单元，每个存储器单元能够存储多个不同级别中的一个。 要存储在存储器件中的一组给定的b信息位首先在卷积或块编码器中被编码，以产生包括多于b位的一组编码位。 然后将该组编码位映射到一个或多个相应的电平，并且一​​个或多个电平各自存储在存储器件的单独单元中。 在一维实施例中，编码可以包括将速率1/2卷积码应用于i = 1,2，...的至少有效位。 。 。 ，并将所得的b + i编码比特映射到一维AM信号组中的2b + i个不同级别之一。 在利用多维信号集的本发明的实施例中，给定的一组位被映射到m维信号组中的信号，具有或不具有位的编码，然后存储所选信号的m个维度中的每一个 作为模拟存储设备的单独单元中的电平。 本发明在给定的读出错误概率的情况下增加了存储器件的存储容量，或者提高了给定存储容量的误差概率。 通过使用多个读和和单元，基于所存储的电平的几个不同读出的和或平均值，为给定的存储电平产生读出值，可以进一步提高读出性能。

公开(公告)号：US06728924B1

公开(公告)日：2004-04-27

申请号：US09425143

申请日：1999-10-21

申请人： Hui-Ling Lou ,  Carl-Erik Wilhelm Sundberg

发明人： Hui-Ling Lou ,  Carl-Erik Wilhelm Sundberg

IPC分类号： H03M1300

CPC分类号： H04L1/08

摘要： A method for providing packet loss recovery in a data packet-based network used for real-time multimedia communications. In accordance with a first illustrative embodiment of the present invention, the information payload associated with a given data packet k is identically copied and appended to data packet k+w (i.e., the information payload is repeated with a delay of w transmitted packets). More generally, the present invention provides a method of coding a sequence of data packets representing a contiguous stream of information, with each data packet comprising, a set of payload information representative of a segment of the stream of information corresponding thereto. The method comprises the steps of coding a first data packet for transmission (wherein the encoded first data packet comprises a first set of payload information representative of a first segment of the stream of information), and coding a second data packet subsequence to the first data packet in the sequence for transmission (wherein the encoded second data packet comprises a second set of payload information representative of a second segment of the stream of information subsequent to the first segment of the stream of information). The encoded second data packet further comprises an additional set of payload information, the additional set of payload information also representative of the first segment of the stream of information, but not representative of other segments of the stream of information.

摘要翻译： 一种用于在用于实时多媒体通信的基于数据分组的网络中提供分组丢失恢复的方法。 根据本发明的第一示例性实施例，与给定数据分组k相关联的信息有效载荷被相同地复制并附加到数据分组k + w（即，信息有效载荷以w发送的分组的延迟重复）。 更一般地，本发明提供了一种对表示连续的信息流的数据分组序列进行编码的方法，每个数据分组包括一组代表与之对应的信息流的分段的有效载荷信息。 该方法包括以下步骤：对用于传输的第一数据分组进行编码（其中编码的第一数据分组包括表示信息流的第一分段的第一组有效载荷信息），以及将第二数据分组子序列编码到第一数据 分组（其中编码的第二数据分组包括表示信息流的第一分段之后的信息流的第二分段的第二组有效载荷信息）。 编码的第二数据分组还包括附加的有效载荷信息集合，附加的有效载荷集合还表示信息流的第一段，但不代表信息流的其他段。

公开(公告)号：US06430401B1

公开(公告)日：2002-08-06

申请号：US09280280

申请日：1999-03-29

申请人： Hui-Ling Lou ,  Deepen Sinha ,  Carl-Erik Wilhelm Sundberg

发明人： Hui-Ling Lou ,  Deepen Sinha ,  Carl-Erik Wilhelm Sundberg

IPC分类号： H04B102

CPC分类号： H04H20/30 ,  H04H60/07 ,  H04H2201/186

摘要： In a communications system implementing, e.g., an in-band on channel AM (IBOC-AM) (also known as “hybrid IBOC-AM”) scheme, multiple bit streams are used to represent an audio signal to be transmitted over one or more frequency bands including, e.g., parts of an AM frequency band for radio broadcast. These bit streams contain various and/or equivalent amounts of audio information. In an illustrative embodiment, at least one of the bit streams is a core bit stream containing core audio information. The remaining bit streams are enhancement bit streams containing enhancement audio information. The core bit stream is necessary for recovering the audio signal with minimal acceptable quality. Such quality is enhanced when the core bit stream, together with one or more of the enhancement bit streams, is used to recover the audio signal. In accordance with the invention, the AM frequency band is divided into subbands. Each of the core and enhancement bit streams is assigned to a respective one of the subbands for transmission. The assignment is conducive to an effective treatment of interference affecting the IBOC-AM system. Other embodiments may include, e.g., communications of the multiple bit streams in accordance with the invention in an IBOC-FM system, a satellite broadcasting system, etc.

摘要翻译： 在实现例如带内频道AM（IBOC-AM）（也称为“混合IBOC-AM”）方案的通信系统中，使用多个比特流来表示将通过一个或多个 频带包括例如用于无线电广播的AM频带的部分。 这些比特流包含各种和/或等量的音频信息。 在说明性实施例中，至少一个比特流是包含核心音频信息的核心比特流。 剩余的比特流是包含增强音频信息的增强比特流。 核心比特流对于以最小可接受的质量恢复音频信号是必需的。 当使用核心比特流以及一个或多个增强比特流来恢复音频信号时，这种质量得到增强。 根据本发明，AM频带被划分成子带。 核心和增强比特流中的每一个分配给相应的一个子带用于传输。 这项任务有利于对影响IBOC-AM系统的干扰的有效处理。 其他实施例可以包括例如根据本发明在IBOC-FM系统，卫星广播系统等中的多个比特流的通信

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。