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10 条记录 (耗时 0.019 秒)

    Modified OFDM subcarrier profile
    1.
    发明申请
    Modified OFDM subcarrier profile 有权
    修改的OFDM子载波简档

    公开(公告)号：US20050117670A1

    公开(公告)日：2005-06-02

    申请号：US10927487

    申请日：2004-08-27

    申请人： Mark Webster ,  Albert Garrett ,  Steven Halford ,  Michael Seals

    发明人： Mark Webster ,  Albert Garrett ,  Steven Halford ,  Michael Seals

    IPC分类号： H04J11/00 ,  H04L27/26

    CPC分类号： H04L27/2602

    摘要： A 10 MHz channelized orthogonal frequency division multiplexing (OFDM) transmitter is provided that communicates using a modified OFDM packet structure with a half-rate oscillator having standard accuracy. The transmitter has an inverse fast fourier transform (IFFT) data processor that appends an outer pair of data subcarriers on either end of an OFDM subcarrier profile. An IFFT long sync processor appends an outer pair of binary phase shift key (BPSK) subcarriers on either end of an OFDM long sync subcarrier profile. By copying or appending the information of the data subcarriers closest to zero Hz. to more robust locations, 10 MHz channelized OFDM can be achieved with half-rate clocks and 20 PPM oscillators.

    摘要翻译： 提供了一种使用修正的OFDM分组结构与具有标准精度的半速率振荡器进行通信的10MHz信道化正交频分复用（OFDM）发射机。 发射机具有在OFDM子载波简档的任一端附加一对外部数据子载波对的快速傅立叶变换（IFFT）数据处理器。 IFFT长同步处理器在OFDM长同步子载波简档的任一端附加一对外部二进制相移键（BPSK）副载波。 通过复制或附加最接近零Hz的数据子载波的信息。 到更健壮的位置，可以使用半速率时钟和20 PPM振荡器来实现10 MHz信道化OFDM。

    Cyclic diversity systems and methods
    2.
    发明申请
    Cyclic diversity systems and methods 有权
    循环多样性系统和方法

    公开(公告)号：US20050259567A1

    公开(公告)日：2005-11-24

    申请号：US11121661

    申请日：2005-05-04

    申请人： Mark Webster ,  Michael Seals

    发明人： Mark Webster ,  Michael Seals

    IPC分类号： H04B7/00 ,  H04B7/06 ,  H04J11/00 ,  H04L27/26

    CPC分类号： H04L27/2602 ,  H04B7/0671

    摘要： Embodiments of cyclic diversity systems and methods are disclosed. One system embodiment, among others, comprises a logic configured to cyclically advance, or perform the periodic equivalent of the same, one or more sections of an orthogonal frequency division multiplexing (OFDM) packet relative to the OFDM packet to be transmitted on a first transmit antenna, the packet having the one or more cyclically advanced sections to be transmitted on a second transmit antenna, the duration of the cyclic advance having a duration less than a guard interval.

    摘要翻译： 公开了循环分集系统和方法的实施例。 一个系统实施例，其中包括一个逻辑，其被配置为相对于要在第一传输上发送的OFDM分组循环地前进或执行正交频分复用（OFDM）分组的相同的一个或多个部分的周期性等价物 天线，具有要在第二发射天线上发送的一个或多个循环高级部分的分组，循环前进的持续时间具有小于保护间隔的持续时间。

    Legacy compatible spatial multiplexing systems and methods
    5.
    发明申请
    Legacy compatible spatial multiplexing systems and methods 有权
    遗留兼容的空间复用系统和方法

    公开(公告)号：US20050281241A1

    公开(公告)日：2005-12-22

    申请号：US11159812

    申请日：2005-06-22

    申请人： Mark Webster ,  Michael Seals

    发明人： Mark Webster ,  Michael Seals

    IPC分类号： H04B7/06 ,  H04J1/00 ,  H04L27/26

    CPC分类号： H04L27/2613 ,  H04B7/02 ,  H04B7/0697 ,  H04W24/00

    摘要： Embodiments of legacy compatible spatial multiplexing systems and methods are disclosed. One method embodiment, among others, comprises receiving long training symbols and cyclic shifted long training symbols corresponding to legacy preamble portions of packets corresponding to first and second transmit signals, receiving long training symbols and inverted cyclic shifted long training symbols corresponding to spatial multiplexing portions of packets corresponding to first and second transmit signals, and combining the symbols corresponding to the first and second transmit antennas to estimate the respective channels.

    摘要翻译： 公开了传统兼容空间复用系统和方法的实施例。 一个方法实施例包括接收对应于与第一和第二发射信号相对应的分组的传统前导码部分的长训练符号和循环移位的长训练符号，接收对应于空间复用部分的长训练符号和反向循环移位长训练符号 分组对应于第一和第二发射信号，并组合对应于第一和第二发射天线的符号以估计相应的信道。

    ON-SIGNAL QUADRATURE MODULATOR CALIBRATION
    6.
    发明申请
    ON-SIGNAL QUADRATURE MODULATOR CALIBRATION 有权
    信号量程调制器校准

    公开(公告)号：US20050075815A1

    公开(公告)日：2005-04-07

    申请号：US10666410

    申请日：2003-09-19

    申请人： Mark Webster ,  Michael Seals ,  Bruce Cochran

    发明人： Mark Webster ,  Michael Seals ,  Bruce Cochran

    IPC分类号： H04B17/00 ,  G06F19/00

    CPC分类号： H04L27/364 ,  H03C3/406 ,  H03D3/008 ,  H03D3/009 ,  H04B17/14

    摘要： An on-signal calibration system I and Q signals of a transmitter to remove distortions in the RF output signal. The transmitter generates I and Q values and converts, modulates and combines the I and Q values into the RF output signal for transmission. The calibration system includes a detector, a sampler, a selector, an imbalance estimator, and an IQ corrector. The detector senses the RF output signal and provides a detection signal indicative thereof. The sampler samples the detection signal and provides digital samples. The selector selects from among the digital samples that correspond to predetermined ranges of the I and Q values, or otherwise predetermined selection boxes at predetermined phases. The imbalance estimator determines at least one imbalance estimate based on selected digital samples. The IQ corrector corrects the I and Q values using at least one imbalance estimate.

    摘要翻译： 发射机的信号校准系统I和Q信号，以消除RF输出信号中的失真。 发射机产生I和Q值，并将I和Q值转换，调制和组合成RF输出信号进行传输。 校准系统包括检测器，采样器，选择器，不平衡估计器和IQ校正器。 检测器感测RF输出信号并提供指示其的检测信号。 采样器对检测信号进行采样，并提供数字采样。 选择器从数字样本中选择对应于I和Q值的预定范围，或者在预定阶段选择预定的选择框。 不平衡估计器基于所选择的数字样本确定至少一个不平衡估计。 IQ校正器使用至少一个不平衡估计来校正I和Q值。

    Carrier tracking circuit and method including dual numerically controlled oscillators and feedforward phase correction coefficient
    7.
    发明申请
    Carrier tracking circuit and method including dual numerically controlled oscillators and feedforward phase correction coefficient 有权
    载波跟踪电路和方法包括双数字控制振荡器和前馈相位校正系数

    公开(公告)号：US20060140308A1

    公开(公告)日：2006-06-29

    申请号：US10785622

    申请日：2004-02-23

    申请人： Daniel MacFarlane Shearer ,  Michael Seals

    发明人： Daniel MacFarlane Shearer ,  Michael Seals

    IPC分类号： H04L27/22

    CPC分类号： H04L27/2657 ,  H04L2027/0032 ,  H04L2027/0046 ,  H04L2027/0055

    摘要： A carrier tracking circuit includes a first phase adjustment circuit coupled to an input of a delay element and a second phase adjustment circuit coupled to an output of the delay element. A phase correction circuit is coupled to output of the delay element is operable to generate a phase adjustment value based upon a data symbol output from the delay element. The phase correction circuit includes a double phase correction circuit to prevent double application of the same phase adjustment value to a symbol by both the first and second phase adjustment circuits. The carrier tracking circuit may be used in OFDM communications systems with each data symbol being an OFDM symbol and with the delay element being an FFT. The carrier tracker circuit also may include a feed forward circuit for correcting the phase error of a given data symbol using a phase error generated from that symbol.

    摘要翻译： 载波跟踪电路包括耦合到延迟元件的输入的第一相位调整电路和耦合到延迟元件的输出的第二相位调整电路。 相位校正电路耦合到延迟元件的输出，其可操作以基于从延迟元件输出的数据符号产生相位调整值。 相位校正电路包括双相校正电路，以防止由第一和第二相位调整电路两者将相同的相位调整值双重施加到符号。 载波跟踪电路可以用在OFDM通信系统中，其中每个数据符号是OFDM符号，并且延迟元件是FFT。 载波跟踪器电路还可以包括用于使用从该符号生成的相位误差来校正给定数据符号的相位误差的前馈电路。

    Watch
    8.
    外观设计
    Watch 有权

    公开(公告)号：USD781723S1

    公开(公告)日：2017-03-21

    申请号：US29549938

    申请日：2015-12-29

    申请人： Michael Seals

    设计人： Michael Seals

    Methods and systems for frequency shift keyed modulation for broadband ultra wideband communication
    9.
    发明申请
    Methods and systems for frequency shift keyed modulation for broadband ultra wideband communication 审中-公开
    用于宽带超宽带通信的频移键控调制方法和系统

    公开(公告)号：US20050220173A1

    公开(公告)日：2005-10-06

    申请号：US11078721

    申请日：2005-03-14

    申请人： James Zyren ,  Michael Seals

    发明人： James Zyren ,  Michael Seals

    IPC分类号： H04B1/713 ,  H04L27/18 ,  H04B1/69

    CPC分类号： H04B1/719 ,  H04B1/715 ,  H04B2001/7154 ,  H04L27/18

    摘要： A system and method for transmitting a UWB or WB signal over a wireless network using a CP-FSK modulated carrier waveform. The system and method comprises selecting a wireless communication channel that is free of at least one of interference and multipath distortion and transmitting a CP-FSK modulated signal over the selected channel having a modulation index of ≦0.707, a bandwidth of at least 500 MHz, a power spectral density of ≦−41.3 dBm/MHz, and a frequency range of 3.1 GHz to 10.6 GHz.

    摘要翻译： 一种用于通过无线网络使用CP-FSK调制载波波形发送UWB或WB信号的系统和方法。 该系统和方法包括选择无干扰和多径失真中的至少一个的无线通信信道，并且在调制指数为<= 0.707，至少500MHz的带宽的所选信道上发送CP-FSK调制信号 ，功率谱密度为<= - 41.3 dBm / MHz，频率范围为3.1 GHz至10.6 GHz。

    Technique for output power dithering for improved transmitter performance
    10.
    发明申请
    Technique for output power dithering for improved transmitter performance 有权
    用于输出功率抖动的技术，用于改善发射机性能

    公开(公告)号：US20050180359A1

    公开(公告)日：2005-08-18

    申请号：US10779606

    申请日：2004-02-18

    申请人： Michael Seals ,  Adam Harriman

    发明人： Michael Seals ,  Adam Harriman

    IPC分类号： H04B7/005 ,  H04W52/20 ,  H04W52/28 ,  H04Q7/00

    CPC分类号： H04W52/20 ,  H04W52/286

    摘要： A technique for admission control of packet flows is disclosed. In one particular exemplary embodiment, the technique may be realized as a method for output power dithering for improved transmitter performance. The method may comprise transmitting a plurality of packets at a first output power, determining a first error rate associated with the transmission of the plurality of packets at the first output power, transmitting the plurality of packets at at least one second output power different from the first output power, determining at least one second error rate associated with the transmission at the at least one second output power, and identifying a desired output power based at least in part on a comparison between the first error rate and the at least one second error rate.

    摘要翻译： 公开了一种分组流的接纳控制技术。 在一个特定的示例性实施例中，该技术可以被实现为用于改善发射机性能的用于输出功率抖动的方法。 该方法可以包括以第一输出功率发送多个分组，确定与第一输出功率下的多个分组的传输相关联的第一错误率，以不同于第一输出功率的至少一个第二输出功率发送多个分组 第一输出功率，确定与所述至少一个第二输出功率处的所述传输相关联的至少一个第二错误率，以及至少部分地基于所述第一错误率和所述至少一个第二错误之间的比较来识别期望的输出功率 率。