Cyclic diversity systems and methods
    1.
    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

    CPC classification number: H04L27/2602 H04B7/0671

    Abstract: 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.

    Abstract translation: 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
    4.
    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

    CPC classification number: H04L27/2613 H04B7/02 H04B7/0697 H04W24/00

    Abstract: 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.

    Abstract translation: 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。

    Modified OFDM subcarrier profile
    5.
    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

    CPC classification number: H04L27/2602

    Abstract: 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.

    Abstract translation: 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。

    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

    CPC classification number: H04L27/364 H03C3/406 H03D3/008 H03D3/009 H04B17/14

    Abstract: 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.

    Abstract translation: 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。

    Silicon-based schottky barrier detector with improved responsivity
    8.
    发明授权
    Silicon-based schottky barrier detector with improved responsivity 有权
    基于硅的肖特基势垒检测器,具有更高的响应度

    公开(公告)号:US08618625B2

    公开(公告)日:2013-12-31

    申请号:US13038470

    申请日:2011-03-02

    CPC classification number: H01L31/101 H01L31/1085

    Abstract: A planar, waveguide-based silicon Schottky barrier photodetector includes a third terminal in the form of a field plate to improve the responsivity of the detector. Preferably, a silicide used for the detection region is formed during a processing step where other silicide contact regions are being formed. The field plate is preferably formed as part of the first or second layer of CMOS metallization and is controlled by an applied voltage to modify the electric field in the vicinity of the detector's silicide layer. By modifying the electric field, the responsivity of the device is “tuned” so as to adjust the momentum of “hot” carriers (electrons or holes, depending on the conductivity of the silicon) with respect to the Schottky barrier of the device. The applied potential functions to align with the direction of momentum of the “hot” carriers in the preferred direction “normal” to the silicon-silicide interface, allowing for an increased number to move over the Schottky barrier and add to the generated photocurrent.

    Abstract translation: 平面的基于波导的硅肖特基势垒光电检测器包括场板形式的第三端子,以提高检测器的响应度。 优选地,在其中形成其它硅化物接触区域的处理步骤期间形成用于检测区域的硅化物。 场板优选地形成为第一或第二CMOS金属化层的一部分,并且通过施加的电压来控制,以修改检测器硅化物层附近的电场。 通过修改电场,器件的响应度被“调谐”,以相对于器件的肖特基势垒调节“热”载流子(电子或空穴,取决于硅的导电性)的动量。 所施加的电位功能与“硅”载体的优势方向“正常”硅硅化物界面的动量方向相一致,允许增加的数量移动到肖特基势垒上并增加产生的光电流。

    Optical interconnection arrangement for high speed, high density communication systems
    9.
    发明授权
    Optical interconnection arrangement for high speed, high density communication systems 有权
    用于高速,高密度通信系统的光互连布置

    公开(公告)号:US08364042B2

    公开(公告)日:2013-01-29

    申请号:US12796868

    申请日:2010-06-09

    Abstract: An optical interconnection arrangement for use in high data applications is presented that eliminates the need for extensive serialization/de-serialization (SERDES) functionality by utilizing pulse amplitude modulation (PAM) techniques to represent the data in the optical domain while utilizing a separate channel for transmitting an optical clock signal, eliminating the need for clock recovery circuitry on the receive end of the arrangement.

    Abstract translation: 提出了一种用于高数据应用的光互连装置,通过利用脉冲幅度调制(PAM)技术来表示光域中的数据,消除了对广泛的串行/解序列化(SERDES)功能的需要,同时利用单独的信道 发送光时钟信号,消除了对该装置接收端的时钟恢复电路的需要。

    Dopant profile control for high speed silicon-based optical modulators
    10.
    发明授权
    Dopant profile control for high speed silicon-based optical modulators 有权
    高速硅基光调制器的掺杂分布控制

    公开(公告)号:US08363986B2

    公开(公告)日:2013-01-29

    申请号:US13029342

    申请日:2011-02-17

    CPC classification number: G02B6/12 G02B6/26 G02B26/00 G02F1/025

    Abstract: A high speed silicon-based optical modulator with control of the dopant profiles in the body and gate regions of the device reduces the series resistance of the structure without incurring substantial optical power loss. That is, the use of increased dopant values in areas beyond the active region will allow for the series resistance to be reduced (and thus increase the modulating speed of the device) without incurring too large a penalty in signal loss. The dopant profiles within the gate and body regions are tailored to exhibit an intermediate value between the high dopant concentration in the contact areas and the low dopant concentration in the carrier integration window area.

    Abstract translation: 具有控制器件的主体和栅极区域中的掺杂剂分布的高速硅基光学调制器降低了结构的串联电阻而不会引起实质的光功率损耗。 也就是说,在有源区域之外的区域中使用增加的掺杂剂值将允许降低串联电阻(从而增加器件的调制速度),而不会在信号损失中造成太大的惩罚。 调整栅极和体区内的掺杂剂分布,以显示接触区域中的高掺杂剂浓度与载流子集成窗口区域中的低掺杂剂浓度之间的中间值。

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