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：US09655002B2

公开(公告)日：2017-05-16

申请号：US12758603

申请日：2010-04-12

申请人： Hongyuan Zhang ,  Hui-Ling Lou ,  Rohit U. Nabar ,  Sudhir Srinivasa ,  Mao Yu ,  Raja Banerjea

发明人： Hongyuan Zhang ,  Hui-Ling Lou ,  Rohit U. Nabar ,  Sudhir Srinivasa ,  Mao Yu ,  Raja Banerjea

IPC分类号： H04W80/00 ,  H04W28/06 ,  H04L1/00 ,  H04L29/06 ,  H04L27/26 ,  H04W84/12 ,  H04W99/00

CPC分类号： H04L1/0079 ,  H04L1/0072 ,  H04L1/009 ,  H04L27/2613 ,  H04L69/18 ,  H04W28/06 ,  H04W84/12 ,  H04W99/00

摘要： In a method for generating a data unit for transmission via a communication channel, wherein the data unit conforms to a first communication protocol, a preamble of the data unit is generated. The preamble includes a first field having information that indicates a duration of the data unit, the first field being formatted such that the first field is decodable by a receiver device that conforms to a second communication protocol but does not conform to the first communication protocol to determine the duration of the data unit based on the first field. Additionally, the preamble is formatted such that a portion of the preamble is decodable by a receiver device that conforms to a third communication protocol but does not conform to the first communication protocol. Also, the preamble is formatted such that a receiver device that conforms to the first communication protocol can determine that the data unit conforms to the first communication protocol. A data portion of the data unit that conforms to the first communication protocol and does not conform to either (i) the second communication protocol or (ii) the third communication protocol is generated.

公开(公告)号：US09590832B1

公开(公告)日：2017-03-07

申请号：US12552966

申请日：2009-09-02

申请人： Hongyuan Zhang ,  Hui-Ling Lou ,  Songping Wu

发明人： Hongyuan Zhang ,  Hui-Ling Lou ,  Songping Wu

IPC分类号： H04K1/10 ,  H04L27/28 ,  H04L27/26 ,  H04L5/00

CPC分类号： H04L27/34 ,  H04L5/0007 ,  H04L5/0046 ,  H04L5/006 ,  H04L25/0204 ,  H04L25/0262 ,  H04L27/2647 ,  H04L27/2657

摘要： Methods an apparatus for performing sub-carrier adaptation in multi-carrier communication systems. In one embodiment, a method includes receiving, via a reverse communication channel, a first data unit via multiple subcarriers. The method further includes determining an estimate of a forward communication channel based on the received first data unit. The method further includes determining different bit rates for the multiple subcarriers based on the estimate of the forward channel. The method further includes transmitting a second data unit via the multiple subcarriers, where bits in the second data unit are allocated across the multiple subcarriers based on the determined bit rates for the multiple subcarriers.

摘要翻译： 方法一种用于在多载波通信系统中执行子载波适配的装置。 在一个实施例中，一种方法包括经由反向通信信道经由多个子载波接收第一数据单元。 该方法还包括基于所接收的第一数据单元来确定前向通信信道的估计。 该方法还包括基于前向信道的估计来确定多个子载波的不同比特率。 该方法还包括经由多个子载波发送第二数据单元，其中基于多个子载波的所确定的比特率，第二数据单元中的比特在多个子载波上被分配。

公开(公告)号：US09014751B1

公开(公告)日：2015-04-21

申请号：US13553146

申请日：2012-07-19

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

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

IPC分类号： H04W88/06 ,  H04W52/26

CPC分类号： H04B7/0486 ,  H04W52/26 ,  H04W52/265 ,  H04W52/346 ,  H04W52/38 ,  H04W72/0453 ,  H04W84/12

摘要： Apparatus having corresponding methods and computer-readable media comprise: a transmitter configured to transmit, according to a first protocol, first wireless signals in a first frequency band; and a receiver configured to receive, according to a second protocol, second wireless signals in a second frequency band, wherein the second frequency band is adjacent to or overlaps the first frequency band; and an arbiter configured to allow the transmitter to transmit the first wireless signals according to the first protocol while the receiver receives the second wireless signals according to the second protocol responsive to at least one of i) a signal power level of the first wireless signals being less than a first signal power threshold; and ii) a signal power level of the second wireless signals being greater than a second signal power threshold.

摘要翻译： 具有相应方法和计算机可读介质的装置包括：发射机，被配置为根据第一协议传输第一频带中的第一无线信号; 以及接收机，被配置为根据第二协议接收第二频带中的第二无线信号，其中所述第二频带与所述第一频带相邻或重叠; 以及仲裁器，被配置为允许发射机根据第一协议发射第一无线信号，同时接收机根据第二协议接收第二无线信号，响应于以下至少之一：i）第一无线信号的信号功率电平为 小于第一信号功率阈值; 以及ii）所述第二无线信号的信号功率电平大于第二信号功率阈值。

公开(公告)号：US08929472B1

公开(公告)日：2015-01-06

申请号：US11782556

申请日：2007-07-24

申请人： Jungwon Lee ,  Woong Jun Jang ,  Hui-Ling Lou

发明人： Jungwon Lee ,  Woong Jun Jang ,  Hui-Ling Lou

IPC分类号： H04B7/02 ,  H04L1/02

CPC分类号： H04L1/08 ,  G06F11/10 ,  H04B7/0413 ,  H04B7/0885 ,  H04L1/0045 ,  H04L1/02 ,  H04L1/1845

摘要： Systems and methods are provided for decoding signal vectors in multiple-input multiple-output (MIMO) systems, where the receiver has received one or more signal vectors from a common digital information sequence. Each received signal vector is decoded using, for example, a maximum-likelihood decoder to produce log-likelihood ratios. The results of the decoders are combined by addition to produce a final decoding estimate. In some embodiments, each of the received signals may be processed prior to decoding. The disclosed decoding scheme may utilize all received information without increasing hardware complexity.

摘要翻译： 提供了用于解码多输入多输出（MIMO）系统中的信号向量的系统和方法，其中接收机已经从公共数字信息序列接收到一个或多个信号向量。 使用例如最大似然解码器对每个接收信号矢量进行解码以产生对数似然比。 通过加法组合解码器的结果以产生最终解码估计。 在一些实施例中，可以在解码之前处理每个接收的信号。 所公开的解码方案可以利用所有接收到的信息而不增加硬件复杂性。

公开(公告)号：US08891592B1

公开(公告)日：2014-11-18

申请号：US12901287

申请日：2010-10-08

申请人： Hongyuan Zhang ,  Hui-Ling Lou

发明人： Hongyuan Zhang ,  Hui-Ling Lou

IPC分类号： H04B1/00

CPC分类号： H04L7/0091 ,  H04B1/7073 ,  H04B7/0617 ,  H04L5/0007 ,  H04L25/0226 ,  H04W56/00

摘要： In a wireless communication system where communication devices exchange information utilizing physical layer (PHY) data units that conform to a first format, where the first format includes a short training field (STF) that includes exactly N repetitions of a spreading sequence, a method for generating a PHY data unit that conforms to a second format, where the second format has a longer STF than the first format, includes generating an STF of the PHY data unit that includes M instances of the spreading sequence, where M is greater than N, and generating a channel estimation field (CEF).

摘要翻译： 在通信设备利用符合第一格式的物理层（PHY）数据单元交换信息的无线通信系统中，其中第一格式包括精确地N个重复扩频序列的短训练场（STF），其中 生成符合第二格式的PHY数据单元，其中所述第二格式具有比所述第一格式更长的STF，包括生成包括所述扩展序列的M个实例的PHY数据单元的STF，其中M大于N， 并产生信道估计字段（CEF）。

公开(公告)号：US08830917B1

公开(公告)日：2014-09-09

申请号：US12699702

申请日：2010-02-03

申请人： Hongyuan Zhang ,  Yong Liu ,  Hui-Ling Lou

发明人： Hongyuan Zhang ,  Yong Liu ,  Hui-Ling Lou

IPC分类号： H04W4/00

CPC分类号： H04W4/00

摘要： In a wireless communication system where communication devices utilize physical layer (PHY) data units that conform to a first format to communicate information associated with a layer of a protocol stack above a media access channel (MAC) layer, where the first format is associated with a first number of symbols in a preamble, a method for generating a PHY data unit that conforms to a second format includes generating a preamble of the PHY data unit, where the preamble includes a second number of symbols, wherein the second number is smaller than the first number; and generating another portion of the PHY data unit.

摘要翻译： 在无线通信系统中，其中通信设备利用符合第一格式的物理层（PHY）数据单元来传送与介质访问信道（MAC）层之上的协议栈层相关联的信息，其中第一格式与 前导码中的第一数量的符号，用于生成符合第二格式的PHY数据单元的方法包括生成PHY数据单元的前导码，其中前导码包括第二数量的符号，其中第二数目小于 第一个数字; 以及生成PHY数据单元的另一部分。

公开(公告)号：US08767616B2

公开(公告)日：2014-07-01

申请号：US13307471

申请日：2011-11-30

申请人： Jihwan P. Choi ,  Yakun Sun ,  Hui-Ling Lou

发明人： Jihwan P. Choi ,  Yakun Sun ,  Hui-Ling Lou

IPC分类号： H04L5/00 ,  H04L5/22 ,  H04J11/00 ,  H04J13/00 ,  H04B7/185 ,  H04W4/00 ,  H04H20/71 ,  H04L5/26

CPC分类号： H04W72/1231 ,  G01S19/03 ,  G01S19/21 ,  H04J11/0023 ,  H04J11/0026 ,  H04J13/00 ,  H04L5/0073 ,  H04L5/0085 ,  H04L5/26 ,  H04W28/04 ,  H04W28/18 ,  H04W52/0216 ,  H04W72/1226 ,  H04W84/12 ,  H04W84/18 ,  Y02D70/00 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/164

摘要： In a method of synchronizing time domain multiplexing interference mitigation schemes of at least a first, second, and third wireless communication link within a first, second, and third network, respectively, a first set of parameters defining a first set of time intervals is determined. The first set of time intervals is utilized to schedule transmissions of the first wireless communication link to reduce interference with transmissions of the second wireless communication link. A second set of parameters defining a second set of time intervals is determined. The second set of time intervals is utilized to schedule transmissions of the first wireless communication link to reduce interference with transmissions of the third wireless communication link. The second set of parameters is determined based at least in part on at least one of the first set of parameters.

摘要翻译： 在分别在第一，第二和第三网络内同步至少第一，第二和第三无线通信链路的时域复用干扰减轻方案的方法中，确定定义第一组时间间隔的第一组参数 。 第一组时间间隔被用于调度第一无线通信链路的传输以减少对第二无线通信链路的传输的干扰。 确定定义第二组时间间隔的第二组参数。 第二组时间间隔被用于调度第一无线通信链路的传输以减少对第三无线通信链路的传输的干扰。 至少部分地基于第一组参数中的至少一个来确定第二组参数。

公开(公告)号：US08761287B2

公开(公告)日：2014-06-24

申请号：US12871692

申请日：2010-08-30

申请人： Rohit U. Nabar ,  Hui-Ling Lou

发明人： Rohit U. Nabar ,  Hui-Ling Lou

IPC分类号： H04B7/02 ,  H04B1/40

CPC分类号： H04B7/0473 ,  H04B7/0408 ,  H04B7/0417 ,  H04B7/043 ,  H04B7/061 ,  H04B7/0874

摘要： In a method for controlling transmission of an information signal to a plurality of receive antennas associated with one or more receivers, a steering matrix is developed using a subset of receive antennas, wherein the subset of receive antennas includes less than all of the plurality of receive antennas. Transmission of the information signal via a plurality of transmit antennas is controlled using the steering matrix.

摘要翻译： 在用于控制信息信号传输到与一个或多个接收机相关联的多个接收天线的方法中，使用接收天线的子集来开发导引矩阵，其中接收天线的子集包括少于所有多个接收 天线。 使用导向矩阵来控制经由多个发送天线的信息信号的发送。

公开(公告)号：US08694851B1

公开(公告)日：2014-04-08

申请号：US13210812

申请日：2011-08-16

申请人： Yakun Sun ,  Jihwan P. Choi ,  Jiwoong Choi ,  Hui-Ling Lou

发明人： Yakun Sun ,  Jihwan P. Choi ,  Jiwoong Choi ,  Hui-Ling Lou

IPC分类号： H03M13/00

CPC分类号： H04L1/0054 ,  H03M13/09 ,  H03M13/27 ,  H03M13/29 ,  H03M13/3738 ,  H03M13/3746 ,  H03M13/3776 ,  H03M13/6331 ,  H04J11/004 ,  H04L1/208 ,  H04L25/03891 ,  H04L25/067 ,  H04L2025/03426

摘要： A system including a first receiver module and a first interference canceller module. The first receiver module is configured to receive a first signal including a first set of codewords and to generate a first set of decoded codewords by decoding at least one of the first set of codewords. The first interference canceller module is configured to measure first reliability metrics of codewords corresponding to the first set of decoded codewords; based on the first reliability metrics, select a second set of decoded codewords from the first set; generate a second signal based on the second set of decoded codewords; and subtract at least a portion of the second signal from the first signal to cancel interference of codewords corresponding to the second set of decoded codewords on the second set of codewords in the first signal.

摘要翻译： 一种包括第一接收机模块和第一干扰消除器模块的系统。 第一接收器模块被配置为接收包括第一组码字的第一信号，并且通过解码第一组码字中的至少一个来生成第一组解码码字。 第一干扰消除器模块被配置为测量与第一组解码码字相对应的码字的第一可靠性度量; 基于所述第一可靠性度量，从所述第一集合中选择第二组解码码字; 基于所述第二组解码码字生成第二信号; 并且从所述第一信号中减去所述第二信号的至少一部分，以消除所述第一信号中所述第二码字集合上对应于所述第二解码码字集合的码字的干扰。