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    • 85. 发明授权
    • Implementing reduced-state viterbi detectors
    • 实现降态维特比探测器
    • US06597742B1
    • 2003-07-22
    • US09603703
    • 2000-06-27
    • Runsheng HeJoao R. Cruz
    • Runsheng HeJoao R. Cruz
    • H04L512
    • H03M13/6343H03M13/41H03M13/4107H03M13/6502H04L25/03229
    • A method of design and an implementation system for reduced-state Viterbi detectors for intersymbol interference channels are provided. The method uses a complement states grouping technique that comprises the steps of finding the state distances between complement states; forming the reduced-state trellis by grouping the complement states with state distance no less than the minimum free distance; and by keeping the complement states with state distance less than minimum free distance unchanged. The resultant reduced-state Viterbi detector has negligible performance loss compared to the full-state Viterbi detector while the complexity is reduced by a factor of about two.
    • 提供了一种用于符号间干扰信道的简化状态维特比检测器的设计方法和实现系统。 该方法使用补码状态分组技术,其包括找到补码状态之间的状态距离的步骤; 通过将状态距离不小于最小自由距离分组补码状态来形成缩小状态网格; 并保持状态距离小于最小自由距离不变的补码状态。 所得到的降维态维特比检测器与全状态维特比检测器相比具有可忽略的性能损失,而复杂度降低了约两倍。
    • 86. 发明授权
    • Cable tester
    • 电缆测试仪
    • US08829917B1
    • 2014-09-09
    • US13470893
    • 2012-05-14
    • William LoYiqing GuoTak TsuiTsin-Ho LeungRunsheng HeEric Janofsky
    • William LoYiqing GuoTak TsuiTsin-Ho LeungRunsheng HeEric Janofsky
    • G01R31/11
    • H04L43/50G01R31/11H04L12/10
    • A physical layer device configured to interface with a plurality of pairs of wires. The physical layer device includes a cable test module configured to transmit a pulse over the plurality of pairs of wires, measure a reflection of the pulse as received from the plurality of pairs of wires, and determine whether a short circuit exists in one of the plurality of pairs of wires based on the measure of the reflection of the pulse. An autonegotiation module is configured to perform autonegotiation to establish a link at a particular speed over the plurality of pairs of wires. The particular speed at which the link is established over the plurality of pairs of wires is based, at least in part, on whether a short circuit exists in one of the plurality of pairs of wires as determined by the cable test module.
    • 物理层设备,被配置为与多对线对接口。 物理层设备包括:电缆测试模块,被配置为在所述多对导线上传输脉冲,测量从所述多对导线接收的所述脉冲的反射,并且确定所述多个导线之一中是否存在短路 的基于脉冲反射测量的电线对。 自动协商模块被配置为执行自动协商以在多对线路上以特定速度建立链路。 至少部分地基于由电缆测试模块确定的多对线中的一条线路是否存在短路,在多对线路上建立链路的特定速度是基于的。