Noise-tolerant signaling schemes supporting simplified timing and data recovery
    42.
    发明授权
    Noise-tolerant signaling schemes supporting simplified timing and data recovery 有权
    支持简化时序和数据恢复的耐噪声信令方案

    公开(公告)号:US07672380B2

    公开(公告)日:2010-03-02

    申请号:US11895415

    申请日:2007-08-23

    摘要: Described are communication systems that convey differential and common-mode signals over the same differential channel. Noise-tolerant communication schemes use low-amplitude common-mode signals that are easily rejected by differential receivers, thus allowing for very high differential data rates. Some embodiments employ the common-mode signals to transmit backchannel signals for adjusting the characteristics of the differential transmitter. Backchannel control signals are effectively conveyed even if the forward channel transmitter is so maladjusted that the received differential data is unrecognizable. Systems in accordance with the above-described embodiments obtain these advantages without additional pins or communications channels, and are compatible with both AC-coupled and DC-coupled communications channels. Data coding schemes and corresponding data recovery circuits eliminate the need for complex, high-speed CDR circuits.

    摘要翻译: 描述了通过相同的差分通道传送差分和共模信号的通信系统。 耐噪声通信方案使用容易被差分接收机拒绝的低振幅共模信号,从而允许非常高的差分数据速率。 一些实施例采用共模信号来发送用于调整差分发射机的特性的反向信道信号。 即使前向信道发射机被调整不正确,接收到的差分数据是无法识别的,反向信道控制信号也被有效地传送。 根据上述实施例的系统在没有附加引脚或通信信道的情况下获得这些优点,并且与AC耦合和DC耦合通信信道兼容。 数据编码方案和相应的数据恢复电路不需要复杂的高速CDR电路。

    ADAPTIVE OPTICAL SIGNAL PROCESSING WITH MULTIMODE WAVEGUIDES
    44.
    发明申请
    ADAPTIVE OPTICAL SIGNAL PROCESSING WITH MULTIMODE WAVEGUIDES 有权
    自适应光信号处理与多模波形

    公开(公告)号:US20090169220A1

    公开(公告)日:2009-07-02

    申请号:US12402127

    申请日:2009-03-11

    IPC分类号: H04B10/12

    CPC分类号: G02B6/4206 G02B6/2861

    摘要: Optical signals are passed in an optical medium using an approach that facilitates the mitigation of interference. According to an example embodiment, a filtering-type approach is used with an optical signal conveyed in an optical fiber, such as a multimode fiber (MMF) or a multimode waveguide. Adaptive spatial domain signal processing, responsive to a feedback signal indicative of data conveyed in the multimode waveguide, is used to mitigate interference in optical signals conveyed in the multimode waveguide.

    摘要翻译: 光信号通过使用有助于减轻干扰的方法在光学介质中传播。 根据示例实施例,滤波型方法与诸如多模光纤(MMF)或多模波导之类的光纤中传送的光信号一起使用。 响应于指示在多模波导中传送的数据的反馈信号的自适应空间域信号处理被用于减轻在多模波导中传送的光信号中的干扰。

    Noise-tolerant signaling schemes supporting simplified timing and data recovery
    48.
    发明授权
    Noise-tolerant signaling schemes supporting simplified timing and data recovery 有权
    支持简化时序和数据恢复的耐噪声信令方案

    公开(公告)号:US07292637B2

    公开(公告)日:2007-11-06

    申请号:US10739823

    申请日:2003-12-17

    摘要: Described are communication systems that convey differential and common-mode signals over the same differential channel. Noise-tolerant communication schemes use low-amplitude common-mode signals that are easily rejected by differential receivers, thus allowing for very high differential data rates. Some embodiments employ the common-mode signals to transmit backchannel signals for adjusting the characteristics of the differential transmitter. Backchannel control signals are effectively conveyed even if the forward channel transmitter is so maladjusted that the received differential data is unrecognizable. Systems in accordance with the above-described embodiments obtain these advantages without additional pins or communications channels, and are compatible with both AC-coupled and DC-coupled communications channels. Data coding schemes and corresponding data recovery circuits eliminate the need for complex, high-speed CDR circuits.

    摘要翻译: 描述了通过相同的差分通道传送差分和共模信号的通信系统。 耐噪声通信方案使用容易被差分接收机拒绝的低振幅共模信号,从而允许非常高的差分数据速率。 一些实施例采用共模信号来发送用于调整差分发射机的特性的反向信道信号。 即使前向信道发射机被调整不正确,接收到的差分数据是无法识别的,反向信道控制信号也被有效地传送。 根据上述实施例的系统在没有附加引脚或通信信道的情况下获得这些优点,并且与AC耦合和DC耦合通信信道兼容。 数据编码方案和相应的数据恢复电路不需要复杂的高速CDR电路。

    Linear transformation circuits
    49.
    发明授权
    Linear transformation circuits 失效
    线性变换电路

    公开(公告)号:US07133463B1

    公开(公告)日:2006-11-07

    申请号:US11213352

    申请日:2005-08-25

    IPC分类号: H04L27/04

    CPC分类号: G06F17/141 G06J1/005

    摘要: A transform circuit includes a first circuit and a second circuit. The first circuit and the second circuit implement first and second mappings that together generate a pre-defined transform of N digital data symbols. The first circuit maps a set of N digital data symbols from N parallel data streams to N analog data symbols by generating N sets of weighted sums of the N digital data symbols. Each respective weighted sum is defined by a respective set of pre-determined weighting values in a first matrix. The second circuit maps the N analog data symbols to a sequence of N output signals over N time intervals. Each of the N output signals corresponds to a respective weighted sum of the N analog data symbols. Each respective weighted sum is defined by a respective set of pre-determined weighting values in a second matrix.

    摘要翻译: 变换电路包括第一电路和第二电路。 第一电路和第二电路实现一起产生N个数字数据符号的预定义变换的第一和第二映射。 第一电路通过产生N个数字数据符号的加权和的N组,将来自N个并行数据流的一组N个数字数据符号映射到N个模拟数据符号。 每个相应的加权和由第一矩阵中的预定加权值的相应集合定义。 第二电路在N个时间间隔内将N个模拟数据符号映射到N个输出信号的序列。 N个输出信号中的每一个对应于N个模拟数据符号的各自的加权和。 每个相应的加权和由第二矩阵中的预定加权值的相应集合来定义。