Coded modulation for digital storage in analog memory devices
    91.
    发明授权
    Coded modulation for digital storage in analog memory devices 失效
    模拟存储设备中数字存储的编码调制

    公开(公告)号:US06212654B1

    公开(公告)日:2001-04-03

    申请号:US08898441

    申请日:1997-07-22

    IPC分类号: G06F1100

    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。

    Short packet for use in beamforming
    92.
    发明授权
    Short packet for use in beamforming 有权
    用于波束成形的短包

    公开(公告)号:US09219576B2

    公开(公告)日:2015-12-22

    申请号:US12876758

    申请日:2010-09-07

    摘要: A method for generating a beamforming training (BFT) unit includes generating a physical layer (PHY) preamble of the BFT unit and generating a first encoding block and a second encoding block using PHY data and MAC data, including at least one of i) using a number of padding bits in a PHY layer of the BFT unit such that the BFT unit consists of the PHY preamble, the first encoding block, and the second encoding block, and ii) generating a MAC protocol data unit (MPDU) having a length such that the BFT unit consists of the PHY preamble, the first encoding block, and the second encoding block.

    摘要翻译: 一种用于生成波束形成训练(BFT)单元的方法包括:生成BFT单元的物理层(PHY)前导码并使用PHY数据和MAC数据生成第一编码块和第二编码块,包括以下各项中的至少一个:i)使用 BFT单元的PHY层中的多个填充比特,使得BFT单元由PHY前导码,第一编码块和第二编码块组成,以及ii)生成具有长度的MAC协议数据单元(MPDU) 使得BFT单元由PHY前导码,第一编码块和第二编码块组成。

    Using non-uniform frequency bands for coexistence among multiple wireless communication technologies
    93.
    发明授权
    Using non-uniform frequency bands for coexistence among multiple wireless communication technologies 有权
    使用不均匀的频带在多个无线通信技术之间共存

    公开(公告)号:US09185684B2

    公开(公告)日:2015-11-10

    申请号:US13605241

    申请日:2012-09-06

    IPC分类号: H04W72/02 H04W72/04 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, wherein bandwidths of the frequency regions are non-uniform, and wherein the first transceiver is configured to transceive, according to a first protocol, first wireless signals in the one of the plurality of frequency regions selected by the controller; 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,其中频率区域的带宽是不均匀的,并且其中第一收发器被配置为收发 对于第一协议,由所述控制器选择的所述多个频率区域中的一个频率区域中的第一无线信号; 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。

    Method and apparatus for avoiding interference among multiple radios
    94.
    发明授权
    Method and apparatus for avoiding interference among multiple radios 有权
    避免多台无线电干扰的方法和装置

    公开(公告)号:US09125216B1

    公开(公告)日:2015-09-01

    申请号:US13622916

    申请日:2012-09-19

    IPC分类号: H04B7/01 H04W72/08 H04W16/14

    摘要: The present disclosure describes techniques for avoiding interference among multiple radios. In some aspects a communication channel of a first wireless interface of a device is determined to be adjacent to a frequency band in which a second wireless interface of the device is configured to communicate and channel measurement results are altered prior to transmission by the first wireless interface to a base station, effective to prevent the base station from selecting, for use by the first wireless interface, the channel adjacent to the frequency band of the second wireless interface.

    摘要翻译: 本公开描述了用于避免多个无线电之间的干扰的技术。 在一些方面,设备的第一无线接口的通信信道被确定为与设备的第二无线接口被配置为通信的频带相邻,并且信道测量结果在第一无线接口发送之前被改变 到基站,有效地防止基站为第一无线接口使用与第二无线接口的频带相邻的信道。

    Feedback spoofing for coexistence among multiple wireless communication technologies
    95.
    发明授权
    Feedback spoofing for coexistence among multiple wireless communication technologies 有权
    反馈欺骗多种无线通信技术共存

    公开(公告)号:US08914019B1

    公开(公告)日:2014-12-16

    申请号:US13553170

    申请日:2012-07-19

    IPC分类号: H04W24/00

    摘要: Apparatus having corresponding methods and computer-readable media comprise: a Mobile Wireless Standards (MWS) transceiver configured to transceive MWS signals in accordance with a schedule, wherein the schedule is based on link status reports transmitted by the MWS transceiver as part of the MWS signals; one or more Industrial, Scientific and Medical (ISM) band transceivers, wherein each ISM band transceiver is configured to transceive ISM band signals; and an arbiter configured to modify the link status reports, prior to transmission of the link status reports, based on at least one of i) an expected transmission of the ISM band signals by one of the ISM band transceivers, and ii) an expected reception of the ISM band signals by one of the ISM band transceivers.

    摘要翻译: 具有相应方法和计算机可读介质的装置包括:移动无线标准(MWS)收发机,其被配置为根据时间表收发MWS信号,其中所述调度基于由MWS收发机发送的作为MWS信号的一部分的链路状态报告 ; 一个或多个工业,科学和医疗(ISM)频带收发器,其中每个ISM频带收发机被配置为收发ISM频带信号; 以及仲裁器,其被配置为在传输所述链路状态报告之前,基于以下至少一个来修改所述链路状态报告:i)所述ISM频带收发机之一的ISM频带信号的预期传输,以及ii)预期接收 的ISM频带收发器之一的ISM频带信号。

    Generalized co-phasing for multiple transmitting and receiving antennas
    96.
    发明授权
    Generalized co-phasing for multiple transmitting and receiving antennas 有权
    用于多个发射和接收天线的广义同相

    公开(公告)号:US08867635B1

    公开(公告)日:2014-10-21

    申请号:US13323781

    申请日:2011-12-12

    IPC分类号: H04K1/10 H04L27/28

    摘要: A method for determining a phase of each of a plurality of transmitting antennas in a multiple input and multiple output (MIMO) communication system includes: calculating, for first and second ones of the plurality of transmitting antennas, a value based on first and second groups of channel gains, the first group including channel gains between the first transmitting antenna and each of a plurality of receiving antennas, the second group including channel gains between the second transmitting antenna and each of the plurality of receiving antennas; and determining the phase of each of the plurality of transmitting antennas based on at least the value.

    摘要翻译: 一种用于确定多输入多输出(MIMO)通信系统中的多个发射天线中的每一个的相位的方法,包括:针对所述多个发射天线中的第一和第二发射天线的第一和第二发射天线,基于第一和第二组 所述第一组包括所述第一发射天线与所述多个接收天线中的每一个之间的信道增益,所述第二组包括所述第二发射天线与所述多个接收天线中的每一个之间的信道增益; 以及至少基于所述值确定所述多个发射天线中的每一个的相位。

    Soft decoding of coded bit-streams
    97.
    发明授权
    Soft decoding of coded bit-streams 有权
    编码比特流的软解码

    公开(公告)号:US08774289B1

    公开(公告)日:2014-07-08

    申请号:US13355349

    申请日:2012-01-20

    IPC分类号: H04L25/00

    摘要: A transmitter can include an encoder configured to encode a data sequence based on a first encoding rate to generate a first encoded bit stream having first bits with at least one first repeated bit and encode the data sequence based on a second, different encoding rate to generate a second encoded bit stream having second bits with at least one second repeated bit, where the first and second encoded bit streams each fully represent the data sequence. A receiver can include circuitry configured to produce identified repeated bits by identifying a repeated bit in the first encoded bit stream and a repeated bit in the second encoded bit stream that correspond to a same bit position, combine the first encoded bit stream and the second encoded bit stream including the identified repeated bits to generate a combined bit stream, and decode the combined bit stream.

    摘要翻译: 发射机可以包括编码器,其被配置为基于第一编码速率对数据序列进行编码,以产生具有至少一个第一重复比特的第一比特的第一编码比特流,并且基于第二不同编码率对该数据序列进行编码以产生 第二编码比特流,具有具有至少一个第二重复比特的第二比特,其中第一和第二编码比特流各自完全表示数据序列。 接收机可以包括被配置为通过识别第一编码比特流中的重复比特和对应于相同比特位置的第二编码比特流中的重复比特来产生识别的重复比特的电路,组合第一编码比特流和第二编码比特流 包括所识别的重复比特以产生组合比特流,并对组合的比特流进行解码。

    Adaptive low-complexity channel estimation
    99.
    发明授权
    Adaptive low-complexity channel estimation 有权
    自适应低复杂度信道估计

    公开(公告)号:US08699644B1

    公开(公告)日:2014-04-15

    申请号:US13282952

    申请日:2011-10-27

    IPC分类号: H04B1/10

    摘要: Systems, methods, and other embodiments associated with adaptive low-complexity channel estimation are illustrated. In one embodiment a device includes a receiver configured to receive an orthogonal frequency-division multiplexed (OFDM) signal. The device also includes a controller configured to control a switch to select between processing paths based, at least in part, on the channel conditions of the OFDM signal. The processing paths selectable by the switch include a first processing path and a second processing path.

    摘要翻译: 示出了与自适应低复杂度信道估计相关联的系统,方法和其他实施例。 在一个实施例中,设备包括被配置为接收正交频分复用(OFDM)信号的接收机。 该设备还包括控制器,其被配置为至少部分地基于OFDM信号的信道条件来控制交换机在处理路径之间进行选择。 由开关可选择的处理路径包括第一处理路径和第二处理路径。

    Link adaptation for OFDM systems
    100.
    发明授权
    Link adaptation for OFDM systems 有权
    OFDM系统的链路适配

    公开(公告)号:US08681888B1

    公开(公告)日:2014-03-25

    申请号:US13619523

    申请日:2012-09-14

    IPC分类号: H04L27/28

    摘要: A method includes determining one or more metrics indicative of at least one of (i) interference on a communication link, (ii) noise on the communication link, and (iii) performance of a receiver receiving packets via the communication link, selecting a modulation and coding scheme as a function of (i) the determined one or more metrics, and (ii) one or more Quality of Service requirements for the communication link, and correcting the selected modulation and coding scheme using a current value of a correction factor. The corrected modulation and coding scheme is to be used to generate one or more packets. The method also includes determining an error rate corresponding to packets previously transmitted over the communication link, and adjusting the correction factor based on the determined error rate. Adjusting the correction factor includes incrementing or decrementing the correction factor.

    摘要翻译: 一种方法包括确定一个或多个度量,其指示以下中的至少一个:(i)通信链路上的干扰,(ii)通信链路上的噪声,以及(iii)经由通信链路接收分组的接收机的性能,选择调制 以及作为(i)确定的一个或多个度量的函数的编码方案,以及(ii)通信链路的一个或多个服务质量要求,以及使用校正因子的当前值来校正所选择的调制和编码方案。 校正的调制和编码方案将用于生成一个或多个分组。 该方法还包括确定对应于先前通过通信链路发送的分组的错误率,以及基于所确定的错误率来调整校正因子。 调整校正因子包括增加或减少校正因子。