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    WAVEFORM SYNTHESIS FOR RFID TRANSMITTERS
    92.
    发明申请
    WAVEFORM SYNTHESIS FOR RFID TRANSMITTERS 审中-公开
    射频发射器的波形合成

    公开(公告)号：US20160294601A1

    公开(公告)日：2016-10-06

    申请号：US15037205

    申请日：2013-12-13

    申请人： CLAIRVOYANT TECHNOLOGY LLC

    发明人： Thomas Frederick

    IPC分类号： H04L27/36 ,  H04L27/06 ,  H04L27/18 ,  H04L27/04 ,  H04W4/00 ,  H04L12/26

    CPC分类号： H04L27/367 ,  G06K7/10009 ,  G06K7/10297 ,  G06K19/0723 ,  H03C1/00 ,  H03C5/00 ,  H03F1/3241 ,  H04B1/59 ,  H04B5/00 ,  H04B5/0062 ,  H04B2001/0425 ,  H04L27/04 ,  H04L27/06 ,  H04L27/18 ,  H04L27/366 ,  H04L43/028 ,  H04W4/35 ,  H04W4/80

    摘要： A waveform synthesis technique for radio frequency identification (RFID) transmitters and an RFID system making us of the technique are disclosed. The RFID transmitter in example embodiments synthesizes a continuous transmitter waveform from a symbol alphabet without Nyquist or interpolation filters. High spectral occupancy waveforms are achieved which include the ability to do both linear and nonlinear predistortion with no increase in computational load once the signal set has been adapted to compensate for linear and nonlinear distortion in the transmitter analog circuitry. A polarity generator can be used to impart the required polarity to each waveform. The RFID transmitter can be employed in RFID readers to reduce the computational requirements of the digital signal processor (DSP).

    摘要翻译： 公开了一种用于射频识别（RFID）发射机和RFID系统的波形合成技术，使其成为该技术。 在示例实施例中的RFID发射器从不具有奈奎斯特或内插滤波器的符号字母表合成连续的发射机波形。 实现了高频谱占用波形，其包括线性和非线性预失真的能力，一旦信号组被适配以补偿发射机模拟电路中的线性和非线性失真，则不增加计算负载。 可以使用极性发生器来赋予每个波形所需的极性。 RFID发射器可用于RFID读取器，以减少数字信号处理器（DSP）的计算需求。

    OTFS methods of data channel characterization and uses thereof
    93.
    发明授权
    OTFS methods of data channel characterization and uses thereof 有权
    OTFS数据通道表征方法及其用途

    公开(公告)号：US09444514B2

    公开(公告)日：2016-09-13

    申请号：US14583911

    申请日：2014-12-29

    申请人： Cohere Technologies, Inc.

    发明人： Ronny Hadani ,  Shlomo Selim Rakib

    IPC分类号： H04B1/692 ,  H04L27/36 ,  H04L5/00 ,  H04L25/02 ,  H04B7/10

    CPC分类号： H04B1/692 ,  H04B7/0626 ,  H04B7/10 ,  H04L5/0007 ,  H04L5/0048 ,  H04L25/0212 ,  H04L25/0226 ,  H04L27/366 ,  H04W24/02

    摘要： Fiber, cable, and wireless data channels are typically impaired by reflectors and other imperfections, producing a channel state with echoes and frequency shifts in data waveforms. Here, methods of using OTFS pilot symbol waveform bursts to automatically produce a detailed 2D model of the channel state are presented. This 2D channel state can then be used to optimize data transmission. For wireless data channels, an even more detailed 2D model of channel state can be produced by using polarization and multiple antennas in the process. Once 2D channel states are known, the system turns imperfect data channels from a liability to an advantage by using channel imperfections to boost data transmission rates. The methods can be used to improve legacy data transmission modes in multiple types of media, and are particularly useful for producing new types of robust and high capacity wireless communications using non-legacy OTFS data transmission methods.

    摘要翻译： 光纤，电缆和无线数据通道通常受到反射器和其他缺陷的损害，产生具有回波的通道状态和数据波形中的频率偏移。 这里，给出了使用OTFS导频符号波形突发自动产生信道状态的详细2D模型的方法。 然后可以使用该2D通道状态来优化数据传输。 对于无线数据信道，可以通过在该过程中使用极化和多个天线来产生更加详细的信道状态的2D模型。 一旦二维渠道状态已知，系统通过使用渠道缺陷来提高数据传输速率，将不完美的数据通道从责任转移到优势。 这些方法可以用于改进多种类型媒体中的传统数据传输模式，并且对于使用非传统OTFS数据传输方法产生新类型的鲁棒和大容量无线通信特别有用。

    Method and apparatus for improving performance of transmit controlled adaptive modulation in xDSL and G.fast systems
    96.
    发明授权
    Method and apparatus for improving performance of transmit controlled adaptive modulation in xDSL and G.fast systems 有权
    用于提高xDSL和G.fast系统中发射控制自适应调制性能的方法和装置

    公开(公告)号：US09397781B2

    公开(公告)日：2016-07-19

    申请号：US14661177

    申请日：2015-03-18

    申请人： IKANOS COMMUNICATIONS, INC.

    发明人： Julien Daniel Pons ,  Murli Mohan Rao

    IPC分类号： H04L1/00 ,  H04M3/18 ,  H04M3/30 ,  H04L1/20 ,  H04L27/36 ,  H04L27/34

    CPC分类号： H04L1/0003 ,  H04L1/0065 ,  H04L1/20 ,  H04L27/3488 ,  H04L27/366 ,  H04M3/18 ,  H04M3/306

    摘要： According to certain aspects, the present invention improves upon the conventional TCAM scheme by allowing a traditional TCM scheme to be used while in RCM mode. In a RCM mode according to embodiments of the invention, the system uses traditional TCM+SNR margin (i.e. SNRM) with a receiver controlled bit allocation table (BAT) and tone ordering table (TOT). In a TCAM mode according to embodiments of the invention, the system uses uncoded hierarchical modulation similar to the modulation originally proposed for TCAM. According to certain aspects, the transmitter in RCM mode in embodiments of the invention can determine when line conditions require a switch to TCAM mode, and signal the transition to the receiver. Likewise, when in a TCAM mode according to embodiments of the invention, the receiver can request to switch back to RCM via a SRA mechanism, for example.

    摘要翻译： 根据某些方面，本发明通过在RCM模式下允许使用传统的TCM方案来改进传统的TCAM方案。 在根据本发明的实施例的RCM模式中，系统使用具有接收机受控位分配表（BAT）和音调排序表（TOT）的传统TCM + SNR余量（即SNRM）。 在根据本发明的实施例的TCAM模式中，系统使用类似于最初为TCAM提出的调制的未编码分级调制。 根据某些方面，在本发明的实施例中的RCM模式中的发射机可以确定线路条件何时需要切换到TCAM模式，并且向转接信号发出信号。 类似地，当根据本发明的实施例的TCAM模式时，接收机可以例如通过SRA机制请求切换回RCM。

    TECHNIQUES FOR LINEARIZING PHASE SEPARATELY FROM AMPLITUDE IN A COMMUNICATIONS SYSTEM
    97.
    发明申请
    TECHNIQUES FOR LINEARIZING PHASE SEPARATELY FROM AMPLITUDE IN A COMMUNICATIONS SYSTEM 有权
    用于在通信系统中与振幅分离相位的技术

    公开(公告)号：US20160182272A1

    公开(公告)日：2016-06-23

    申请号：US14574951

    申请日：2014-12-18

    申请人： ViaSat, Inc.

    发明人： Dean L. Cook ,  Bobby D. Andersen, II ,  Konrad Miehle ,  David E. Pettit

    IPC分类号： H04L27/36 ,  H04B15/00

    CPC分类号： H04B15/00 ,  H03F1/3241 ,  H03F1/3282 ,  H03F1/34 ,  H03F3/189 ,  H03F3/24 ,  H03F2200/438 ,  H03F2200/451 ,  H04B1/0475 ,  H04B1/10 ,  H04B2001/0408 ,  H04B2001/0425 ,  H04B2001/0433 ,  H04L27/366

    摘要： The present disclosure, for example, relates to one or more techniques for linearizing a signal in a communications system. An input signal may be obtained at a beginning of a signal path of a radio frequency (RF) communication device. The RF communication device may estimate subsequent distortion of the input signal due to the signal path. The estimated distortion may include estimated phase distortion and estimated amplitude distortion of the input signal. The RF communication device may adjust phase and amplitude within the signal path to compensate for the estimated phase distortion and the estimated amplitude distortion to produce an adjusted signal. The phase within the signal path of the input signal may be adjusted separately from the amplitude within the signal path of the input signal. The RF communication device may generate a linearized signal at an end of the signal path based at least in part on the adjusted signal.

    摘要翻译： 本公开例如涉及用于线性化通信系统中的信号的一种或多种技术。 可以在射频（RF）通信设备的信号路径的开始处获得输入信号。 RF通信设备可以估计由于信号路径而导致的输入信号的后续失真。 估计的失真可以包括输入信号的估计相位失真和估计的幅度失真。 RF通信设备可以调整信号路径内的相位和幅度，以补偿估计的相位失真和估计的幅度失真，以产生经调整的信号。 可以将输入信号的信号路径内的相位与输入信号的信号路径内的振幅分开调整。 RF通信设备可以至少部分地基于经调整的信号在信号路径的末端产生线性化信号。

    ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING POLAR TRANSMITTER
    98.
    发明申请
    ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING POLAR TRANSMITTER 有权
    正交频分复用极性发射器

    公开(公告)号：US20160173314A1

    公开(公告)日：2016-06-16

    申请号：US14570738

    申请日：2014-12-15

    申请人： APPLE INC.

    发明人： Zohar Agon

    IPC分类号： H04L27/26 ,  H04L27/36

    CPC分类号： H04L27/2637 ,  H04L27/3461 ,  H04L27/361 ,  H04L27/366 ,  H04L27/367

    摘要： Devices and methods for reducing and/or substantially preventing nonlinearities and discontinuities during the translation stage from an I/Q signal into a polar coordinate OFDM signal are provided. By way of example, a method includes receiving an incoming data signal via a processor of a transmitter. The method further includes computing one or more roots of a first function representing a phase component of the data signal, computing a second function representing the phase component, and deriving one or more characteristics of the phase component based on the second function. The method further includes adjusting one of the one or more characteristics in a second domain to establish a substantially finite bandwidth of the phase component.

    摘要翻译： 提供了用于在从I / Q信号转换成极坐标OFDM信号的转换阶段期间减少和/或基本上防止非线性和不连续性的装置和方法。 作为示例，一种方法包括经由发射机的处理器接收输入数据信号。 该方法还包括计算表示数据信号的相位分量的第一函数的一个或多个根，计算表示相位分量的第二函数，以及基于第二函数导出相位分量的一个或多个特性。 该方法还包括调整第二域中的一个或多个特性中的一个以建立相位分量的基本上有限的带宽。

    Semiconductor device including first inductor of a spiral shape and a second inductor having an opening which is opposite the first inductor
    99.
    发明授权
    Semiconductor device including first inductor of a spiral shape and a second inductor having an opening which is opposite the first inductor 有权
    半导体器件包括螺旋形状的第一电感器和具有与第一电感器相对的开口的第二电感器

    公开(公告)号：US09319091B2

    公开(公告)日：2016-04-19

    申请号：US14724525

    申请日：2015-05-28

    申请人： Renesas Electronics Corporation

    发明人： Takao Kihara

    IPC分类号： H01L27/08 ,  H04B1/40 ,  H01L49/02 ,  H01L23/522 ,  H01F17/00 ,  H04L25/03 ,  H04L27/36

    CPC分类号： H04B1/40 ,  H01F17/0006 ,  H01F17/0013 ,  H01F38/14 ,  H01F2017/0073 ,  H01F2017/0086 ,  H01F2038/143 ,  H01L23/5227 ,  H01L28/10 ,  H01L2924/0002 ,  H04L25/03343 ,  H04L27/366 ,  H04L2025/03356 ,  Y10S257/924 ,  H01L2924/00

    摘要： A semiconductor device is configured to perform a transmission process and a reception process using a radio wave, includes a transmission unit configured to perform the transmission process, and includes a modulator having a first inductor of a spiral shape, and a reception unit configured to perform the reception process, which includes a local oscillator having a second inductor. The second inductor includes a first portion extending in a first direction, a second portion extending in a second direction and a third portion extending in a third direction. The second direction and the third direction intersect with the first direction. The first portion, second portion and third portion include a same conductor layer. The second portion has an end which is not connected with the first portion. The third portion has another end which is not connected with the first portion, and the end of the second portion and said another end of the third portion are located apart in a plan view.

    摘要翻译： 半导体器件被配置为执行使用无线电波的发送处理和接收处理，包括被配置为执行发送处理的发送单元，并且包括具有螺旋形状的第一电感器的调制器和被配置为执行 该接收处理包括具有第二电感器的本地振荡器。 第二电感器包括沿第一方向延伸的第一部分，在第二方向上延伸的第二部分和沿第三方向延伸的第三部分。 第二方向和第三方向与第一方向相交。 第一部分，第二部分和第三部分包括相同的导体层。 第二部分具有不与第一部分连接的端部。 第三部分具有不与第一部分连接的另一端，并且第二部分的端部和第三部分的另一端在俯视图中分开。

    TX IQ MISMATCH PRE-COMPENSATION USING DIRECT LEARNING ADAPTATION
    100.
    发明申请
    TX IQ MISMATCH PRE-COMPENSATION USING DIRECT LEARNING ADAPTATION 审中-公开
    TX IQ MISMATCH使用直接学习适应的预补偿

    公开(公告)号：US20160056990A1

    公开(公告)日：2016-02-25

    申请号：US14834405

    申请日：2015-08-24

    申请人： Texas Instruments Incorporated

    发明人： Charles K. Sestok, IV

    IPC分类号： H04L27/36

    CPC分类号： H04L27/364 ,  H04L27/366 ,  H04L27/3863

    摘要： A direct conversion wireless transmitter includes IQ mismatch pre-compensation using direct learning adaptation to adjust IQ pre-compensation filtering. Widely-linear IQ_mismatch pre-compensation filtering compensates for IQ mismatch in the TX analog chain, filtering of input data x(n) to provide pre-compensated data y(n) with a compensation image designed to interfere destructively with the IQ_mismatch image. A feedback receiver FBRX captures feedback data z(n) used for direct learning adaptation. DL adaptation adjusts IQ_mismatch filters, modeled as an x(n)_direct and complex conjugate x(n)_image transfer functions w1 and w2, including generating an adaptation error signal based on a difference between TX/FBRX-path delayed versions of x(n) and z(n), and can include estimation and compensation for TX/FBRX phase errors. DL adaptation adjusts the IQ pre-comp filters w1/w2 to minimize the adaptation error signal. Similar modeling can be used for IQ mismatch. The IQ_mismatch pre-compensator can be implemented as a combination of digital signal processing and hardware acceleration.

    摘要翻译： 直接转换无线发射机包括使用直接学习适应的IQ失配预补偿来调整IQ预补偿滤波。 宽线性IQ不匹配预补偿滤波补偿TX模拟链中的IQ失配，对输入数据x（n）进行滤波，以提供预设补偿数据y（n）与补偿图像，设计用于与IQ_mismatch图像相互破坏性地进行干扰。 反馈接收机FBRX捕获用于直接学习适配的反馈数据z（n）。 DL自适应调整IQ_mismatch过滤器，被建模为x（n）_direct和复共轭x（n）_图像传递函数w1和w2，包括基于x（n）的TX / FBRX路径延迟版本之间的差异生成自适应误差信号 ）和z（n），并且可以包括TX / FBRX相位误差的估计和补偿。 DL自适应调整IQ预压缩滤波器w1 / w2以最小化适应误差信号。 类似建模可用于IQ不匹配。 IQ_Mismatch预补偿器可以实现为数字信号处理和硬件加速的组合。