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    SINGLE RF OSCILLATOR SINGLE-SIDE BAND MODULATION FOR RFID READERS USING TONE INSERTION DURING READER RECEPTION
    1.
    发明申请
    SINGLE RF OSCILLATOR SINGLE-SIDE BAND MODULATION FOR RFID READERS USING TONE INSERTION DURING READER RECEPTION 有权
    单片射频振荡器用于RFID读取器的单边调制在读卡器接收期间使用音频插入

    公开(公告)号：US20060199551A1

    公开(公告)日：2006-09-07

    申请号：US11073340

    申请日：2005-03-04

    申请人： Michael Thomas ,  Scott Cooper ,  Aanand Esterberg

    发明人： Michael Thomas ,  Scott Cooper ,  Aanand Esterberg

    IPC分类号： H04B1/04

    CPC分类号： H04B1/68 ,  H03C1/60 ,  H03C2200/007

    摘要： A transmitter upconverts a SSB data signal during a first operational mode using a RF upconverting signal having a frequency that is offset from a center frequency of a channel (ωC) by an amount that depends on the data signal's SSB bandwidth (ωM). In a second operational mode, the transmitter upconverts a tone signal having a frequency ωM using the same RF upconverting signal. The upconverted tone signal can be used as a continuous wave (CW) carrier signal having a frequency ωC. The transmitter has a single RF oscillator to output both a SSB signal centered at frequency ωC during the first mode and a carrier signal of frequency ωC during the second mode.

    摘要翻译： 发射机在第一操作模式期间使用具有偏离信道的中心频率（ω）的频率的RF上变频信号来上变频SSB数据信号，该频率取决于数据信号 SSB带宽（Ω-M）。 在第二操作模式中，发射器使用相同的RF上变频信号来上变频具有ωωM的频率信号。 上转换音调信号可以用作具有频率ωC的连续波（CW）载波信号。 发射机具有单个RF振荡器，以在第一模式期间输出以频率ω-C'为中心的SSB信号，并且在第二模式期间输出频率ωC'C的载波信号。

    RFID READERS SYSTEMS AND METHODS FOR HOPPING AWAY FROM A FREQUENCY CHANNEL WITH RF INTERFERENCE
    2.
    发明申请
    RFID READERS SYSTEMS AND METHODS FOR HOPPING AWAY FROM A FREQUENCY CHANNEL WITH RF INTERFERENCE 有权
    RFID读写器系统和方法用于从具有RF干扰的频道通道中跳出

    公开(公告)号：US20070296590A1

    公开(公告)日：2007-12-27

    申请号：US11849804

    申请日：2007-09-04

    申请人： Christopher Diorio ,  Aanand Esterberg ,  Thomas Anderl ,  Scott Cooper

    发明人： Christopher Diorio ,  Aanand Esterberg ,  Thomas Anderl ,  Scott Cooper

    IPC分类号： G08B13/14

    CPC分类号： G06K7/0008 ,  G06K7/10069 ,  G06K7/10198 ,  G06K19/0723

    摘要： RFID readers, systems, and methods are provided for overcoming the effects of RF interference. While a system is communicating in a channel, RF interference is monitored. If it is low, then the next channel to be hopped onto is chosen in an unbiased manner. But if interference is high, then the next channel to be hopped onto is chosen in a biased manner that disfavors at least one channel over another, in view of the detected interference. The choice of the next channel can thus result in diminishing communication in channels with a lot of RF interference.

    摘要翻译： 提供RFID读取器，系统和方法来克服RF干扰的影响。 当系统正在通道中进行通信时，会监视射频干扰。 如果它是低的，那么要跳过的下一个通道是以不偏不倚的方式选择的。 但是如果干扰较高，则考虑到检测到的干扰，要跳过的下一个信道被选择为以偏置的方式使得至少一个信道相对于另一信道不利。 因此，下一个通道的选择可以导致具有大量RF干扰的通道中的通信减少。

    Single RF oscillator single-side band modulation for RFID readers with frequency translation and filtering
    3.
    发明申请
    Single RF oscillator single-side band modulation for RFID readers with frequency translation and filtering 有权
    用于具有频率转换和滤波的RFID读取器的单RF振荡器单边带调制

    公开(公告)号：US20060211386A1

    公开(公告)日：2006-09-21

    申请号：US11073292

    申请日：2005-03-04

    申请人： Michael Thomas ,  Scott Cooper ,  Aanand Esterberg

    发明人： Michael Thomas ,  Scott Cooper ,  Aanand Esterberg

    IPC分类号： H04B1/02 ,  H04B1/68 ,  G08B13/14

    CPC分类号： G06K7/0008

    摘要： A transmitter shifts a baseband data signal having a bandwidth of 2ωM using a tone signal having a frequency ωM, which centers a sideband of the data signal at zero frequency. The transmitter then filters the shifted signal to filter out the non-centered sideband, and then adds the tone signal to form a composite signal. The transmitter upconverts the composite signal during a first operational mode using a RF signal having a frequency ωC equal to a center frequency of a channel. In a second operational mode, the transmitter upconverts a DC level using the same RF signal. The upconverted DC level can be used as a continuous wave carrier signal having a frequency ωC. The transmitter has a single RF oscillator to output both a SSB signal centered at frequency ωC during the first mode and a carrier signal of frequency ωC during the second mode.

    摘要翻译： 发射机使用具有频率ωM M M的音调信号来移动具有2omega M带宽的基带数据信号，该频率ωM是使数据信号的边带以零频率居中。 然后，发射机对移位的信号进行滤波，以滤除非中心边带，然后将音调信号相加以形成复合信号。 发射机在第一操作模式期间使用具有等于信道的中心频率的频率ω-C的RF信号来上变频合成信号。 在第二种操作模式中，发射器使用相同的RF信号上变频DC电平。 上转换的DC电平可以用作具有频率ωC的连续波载波信号。 发射机具有单个RF振荡器，以在第一模式期间输出以频率ω-C'为中心的SSB信号，并且在第二模式期间输出频率ωC'C的载波信号。

    RFID READER SYSTEMS DETECTING PILOT TONE
    4.
    发明申请
    RFID READER SYSTEMS DETECTING PILOT TONE 审中-公开
    RFID读写器系统检测引导音

    公开(公告)号：US20070109129A1

    公开(公告)日：2007-05-17

    申请号：US11622092

    申请日：2007-01-11

    申请人： Kurt Sundstrom ,  Scott Cooper ,  Amir Sarajedini ,  Aanand Esterberg ,  Todd Humes ,  Christopher Diorio

    发明人： Kurt Sundstrom ,  Scott Cooper ,  Amir Sarajedini ,  Aanand Esterberg ,  Todd Humes ,  Christopher Diorio

    IPC分类号： G08B13/14

    CPC分类号： G06K7/0008

    摘要： RFID tags are commanded to generate a pilot tone in their backscatter. When the backscattered pilot tone is received in the reader, the pilot tone is used to estimate the tag period/frequency. Then, the estimate is used to seed and lock a symbol timing recovery loop, which provides a detected signal to one or more correlators for detecting the tag preamble. A delayed version of the received tag signal is compared against a baseline signal threshold established from the received signal to detect the pilot tone.

    摘要翻译： 命令RFID标签在其反向散射中产生导频音。 当在读取器中接收到反向散射导频时，使用导频音来估计标签周期/频率。 然后，估计用于对符号定时恢复循环进行种子和锁定，该循环向一个或多个相关器提供检测信号以检测标签前导码。 将接收到的标签信号的延迟版本与从接收信号建立的基线信号阈值进行比较，以检测导频音。

    RFID READERS SYSTEMS AND METHODS FOR EARLY HOPPING OUT OF A FREQUENCY CHANNEL IN THE PRESENCE OF RF INTERFERENCE
    5.
    发明申请
    RFID READERS SYSTEMS AND METHODS FOR EARLY HOPPING OUT OF A FREQUENCY CHANNEL IN THE PRESENCE OF RF INTERFERENCE 有权
    RFID读写器系统和方法在RF干扰存在的情况下早期被频繁地通道

    公开(公告)号：US20070296603A1

    公开(公告)日：2007-12-27

    申请号：US11849737

    申请日：2007-09-04

    申请人： Christopher Diorio ,  Thomas Anderl ,  Scott Cooper ,  Aanand Esterberg

    发明人： Christopher Diorio ,  Thomas Anderl ,  Scott Cooper ,  Aanand Esterberg

    IPC分类号： H04L1/00

    CPC分类号： G06K7/0008 ,  G06K7/10069 ,  G06K7/10198

    摘要： RFID readers, systems, and methods are provided for overcoming the effects of RF interference. While a system is communicating in a channel, RF interference is monitored. If it is low, then hopping to another channel is performed according to an ordinary decision. But if interference is high, then hopping out to another channel can be earlier than would be dictated by the ordinary decision under the same circumstances. The earlier hopping out can result in diminishing communication in channels with a lot of RF interference.

    摘要翻译： 提供RFID读取器，系统和方法来克服RF干扰的影响。 当系统正在通道中进行通信时，会监视射频干扰。 如果为低，则根据普通决定执行到另一信道的跳频。 但是，如果干扰较大，那么跳出另一个频道可能会比同样情况下的普通决策所规定的更早。 较早的跳出可能导致频道中的通信频繁减少，具有大量的射频干扰。

    RFID joint acquisition of time sync and timebase
    6.
    发明申请
    RFID joint acquisition of time sync and timebase 有权
    RFID联合获取时间同步和时基

    公开(公告)号：US20050269408A1

    公开(公告)日：2005-12-08

    申请号：US11136948

    申请日：2005-05-24

    申请人： Aanand Esterberg ,  William Colleran ,  Scott Cooper

    发明人： Aanand Esterberg ,  William Colleran ,  Scott Cooper

    IPC分类号： G06K7/00

    CPC分类号： G06K7/0008

    摘要： Systems and methods to determine timebase and timing (i.e., time sync) of received signals in RFID systems. Multiple matched filters corresponding to multiple timebases are used to receive the preambles of signals received from RFID tags. The multiple matched filters define a range of expected timebases of the received signals. The matched filter with the maximum output signal peak is used to derive the timebase and timing of the received signal. Viterbi techniques can be used in determining the timebase and timing to incorporate a portion of the data signal in addition to the preamble. Reconfigurable matched filters can be used so that after a preliminary timebase is determined as described above, the matched filters can be reconfigured to define a new smaller range centered about the preliminary timebase. This allows the timebase to be determined with finer resolution when another preamble portion is received.

    摘要翻译： 确定RFID系统中接收信号的时基和定时（即，时间同步）的系统和方法。 对应于多个时基的多个匹配滤波器被用于接收从RFID标签接收的信号的前导码。 多个匹配滤波器定义了接收信号的预期时基的范围。 具有最大输出信号峰值的匹配滤波器用于导出接收信号的时基和定时。 除了前导码之外，维特比技术可用于确定并入数据信号的一部分的时基和定时。 可以使用可重配置匹配滤波器，使得在如上所述确定初步时基之后，可以重新配置匹配滤波器以定义以初步时基为中心的新的较小范围。 这允许当接收另一个前同步码部分时，以更精细的分辨率确定时基。

    Interleaved digital correction for MASH delta-sigma ADC
    7.
    发明授权
    Interleaved digital correction for MASH delta-sigma ADC 有权
    MASH delta-sigma ADC的交错数字校正

    公开(公告)号：US06873281B1

    公开(公告)日：2005-03-29

    申请号：US10652537

    申请日：2003-08-28

    申请人： Aanand Esterberg ,  Scott Cooper

    发明人： Aanand Esterberg ,  Scott Cooper

    IPC分类号： H03M1/34 ,  H03M3/00

    CPC分类号： H03M3/344 ,  H03M3/414 ,  H03M3/47

    摘要： Methods of and apparatuses for optimizing quantization noise cancellation in multi-phase sampled MASH ADCs are disclosed. A test signal is combined with quantization noise produced by a delta-sigma modulator. Two parallel adaptive filters (i.e. even and odd filters) are configured to receive respective even and odd samples of a digital output signal of a MASH ADC analog modulator. Adaptive coefficients for the even adaptive filter are derived from correlation results between the even samples of the test signal and associated even samples of the final digital output signal. Similarly, adaptive coefficients for the odd adaptive filter are derived from correlation results between the odd samples of the test signal and associated odd samples of the final digital output signal. Using the adaptive coefficients, the even and odd adaptive filters are able to independently compensate for analog variations in the two paths. Fixed, slowly varying, and clock rate variations may all be tracked out using the methods and apparatus of the present invention.

    摘要翻译： 公开了用于优化多相采样MASH ADC中的量化噪声消除的方法和装置。 测试信号与由Δ-Σ调制器产生的量化噪声组合。 两个并行自适应滤波器（即偶数和奇数滤波器）被配置为接收MASH ADC模拟调制器的数字输出信号的相应偶数和奇数样本。 用于均匀自适应滤波器的自适应系数是从测试信号的偶数采样和最终数字输出信号的相关偶数采样之间的相关结果得出的。 类似地，用于奇数自适应滤波器的自适应系数从测试信号的奇数样本与最终数字输出信号的相关奇数采样之间的相关结果得出。 使用自适应系数，偶数和奇数自适应滤波器能够独立地补偿两个路径中的模拟变化。 可以使用本发明的方法和装置来全部跟踪固定的，缓慢变化的和时钟频率的变化。

    Preparation of metallic comonomers for polystyrene
    10.
    发明授权
    Preparation of metallic comonomers for polystyrene 有权
    制备聚苯乙烯的金属共聚单体

    公开(公告)号：US08829114B2

    公开(公告)日：2014-09-09

    申请号：US13306088

    申请日：2011-11-29

    申请人： Steven D. Gray ,  Scott Cooper ,  Jason Clark

    发明人： Steven D. Gray ,  Scott Cooper ,  Jason Clark

    IPC分类号： C08L33/02

    CPC分类号： C08F230/04 ,  C08F212/08 ,  C08F220/06 ,  C08F230/00

    摘要： A method for making a polystyrene ionomer comprises: preparing a metallic comonomer within styrene monomer to form a reaction mixture; and placing the reaction mixture under conditions suitable for the formation of a polymer composition. The metallic comonomer can be a metal acrylate, formed by contacting a metal complex and an acrylate precursor.

    摘要翻译： 制备聚苯乙烯离聚物的方法包括：在苯乙烯单体内制备金属共聚单体以形成反应混合物; 并将反应混合物置于适于形成聚合物组合物的条件下。 金属共聚单体可以是通过使金属络合物和丙烯酸酯前体接触而形成的金属丙烯酸酯。