Burst mode optical receiver for maintaining constant signal amplitude
    2.
    发明授权
    Burst mode optical receiver for maintaining constant signal amplitude 有权
    突发模式光接收机用于保持恒定的信号幅度

    公开(公告)号:US07539424B2

    公开(公告)日:2009-05-26

    申请号:US10696142

    申请日:2003-10-28

    IPC分类号: H04B10/06

    CPC分类号: H04B10/6931

    摘要: Provided is a burst mode optical receiver capable of accurately detecting an optical signal of minimum amplitude, by automatically controlling a gain of a pre-amplifier according to an amplitude of an input optical signal. The burst mode optical receiver can automatically control a gain of a pre-amplifier according to the amplitude of an input optical signal using an output signal of a first peak detector. In other words, when the input optical signal has a small amplitude that meets the receiving sensitivity of the burst mode optical receiver, the gain of the pre-amplifier automatically increases, thereby improving the receiving sensitivity of the burst mode optical receiver.

    摘要翻译: 提供了能够通过根据输入光信号的幅度自动控制前置放大器的增益来精确地检测最小幅度的光信号的突发模式光接收机。 突发模式光接收机可以使用第一峰值检测器的输出信号根据输入光信号的幅度自动控制前置放大器的增益。 换句话说,当输入光信号具有满足突发模式光接收机的接收灵敏度的小幅度时,前置放大器的增益自动增加,从而提高突发模式光接收机的接收灵敏度。

    LOCATION BASED VEHICLE MULTIHOP PROTOCOL UNICAST APPARATUS AND ROUTING METHOD USING THE APPARATUS
    4.
    发明申请
    LOCATION BASED VEHICLE MULTIHOP PROTOCOL UNICAST APPARATUS AND ROUTING METHOD USING THE APPARATUS 有权
    基于位置的车辆多媒体协议使用装置的装置和路由方法

    公开(公告)号:US20110134840A1

    公开(公告)日:2011-06-09

    申请号:US12949362

    申请日:2010-11-18

    IPC分类号: H04W40/00

    摘要: In order for a source node including a vehicle multihop protocol unicast apparatus to route data to a destination node, the source node broadcasts a location request message to neighbor node and receives a location response message from the neighbor nodes in response to the location request message. Therefore, the source node routs unicast data on the basis of the location information of the destination node included in the location response message. At this time, the source node uses a location based forwarder selecting algorithm in order to select a forwarder.

    摘要翻译: 为了使包括车辆多跳协议单播装置的源节点将数据路由到目的地节点,源节点向邻居节点广播位置请求消息,并响应于位置请求消息从邻居节点接收位置响应消息。 因此,源节点基于位置响应消息中包括的目的地节点的位置信息来路由单播数据。 此时,源节点使用基于位置的转发器选择算法来选择转发器。

    APPARATUS AND METHOD FOR TIME SYNCHRONIZATION AND RECEPTION APPARATUS OF OFDM SYSTEM
    5.
    发明申请
    APPARATUS AND METHOD FOR TIME SYNCHRONIZATION AND RECEPTION APPARATUS OF OFDM SYSTEM 有权
    OFDM系统的时间同步和接收装置的装置和方法

    公开(公告)号:US20100158164A1

    公开(公告)日:2010-06-24

    申请号:US12643296

    申请日:2009-12-21

    IPC分类号: H04L27/06 H04L7/00

    摘要: An apparatus for time synchronization of an orthogonal frequency division multiplexing (OFDM) system oversamples a received signal using a master clock having a frequency at least four times higher than a minimum sampling frequency in a transmission apparatus, sets one of a plurality of oversampled signals to an on-time signal, and shifts each of the remaining oversampled signals by a predetermined time on the basis of the on-time signal. The apparatus for time synchronization calculates a correlation value by correlating each of the shifted signals and the on-time signal with a previously known signal, detects a maximum energy value among the calculated correlation values, and detects a start point of a frame by comparing the maximum energy value with a predetermined threshold value.

    摘要翻译: 正交频分复用(OFDM)系统的时间同步的装置使用在发送装置中具有比最小采样频率高至少四倍的频率的主时钟对接收信号进行采样,将多个过采样信号中的一个设置为 导通时间信号,并且基于接通时间信号将每个剩余的过采样信号移位预定时间。 用于时间同步的装置通过将每个移位信号和接通时间信号与先前已知的信号相关来计算相关值,检测所计算的相关值中的最大能量值,并通过比较 具有预定阈值的最大能量值。

    Location based vehicle multihop protocol unicast apparatus and routing method using the apparatus
    7.
    发明授权
    Location based vehicle multihop protocol unicast apparatus and routing method using the apparatus 有权
    基于位置的车辆多跳协议单播设备和使用该设备的路由方法

    公开(公告)号:US08570930B2

    公开(公告)日:2013-10-29

    申请号:US12949362

    申请日:2010-11-18

    IPC分类号: H04Q7/00

    摘要: In order for a source node including a vehicle multihop protocol unicast apparatus to route data to a destination node, the source node broadcasts a location request message to neighbor node and receives a location response message from the neighbor nodes in response to the location request message. Therefore, the source node routes unicast data on the basis of the location information of the destination node included in the location response message. At this time, the source node uses a location based forwarder selecting algorithm in order to select a forwarder.

    摘要翻译: 为了使包括车辆多跳协议单播装置的源节点将数据路由到目的地节点,源节点向邻居节点广播位置请求消息,并响应于位置请求消息从邻居节点接收位置响应消息。 因此,源节点根据位置响应消息中包含的目的地节点的位置信息来路由单播数据。 此时,源节点使用基于位置的转发器选择算法来选择转发器。

    Channel access method for vehicle communication handover
    8.
    发明授权
    Channel access method for vehicle communication handover 有权
    用于车辆通信切换的信道接入方法

    公开(公告)号:US08543155B2

    公开(公告)日:2013-09-24

    申请号:US13195365

    申请日:2011-08-01

    IPC分类号: H04B7/00

    CPC分类号: H04W36/00 H04W36/18 H04W74/00

    摘要: A first roadside equipment operates as a transmitting/receiving mode in a control channel interval of an Nth synchronization interval so as to support a handover. In this instance, a second roadside equipment neighboring to the first roadside equipment operates as a receiving mode in the control channel interval of the Nth synchronization interval. The first roadside equipment operates as the receiving mode in a control channel interval of an (N+1)th synchronization interval. In this instance, the second roadside equipment operates as the transmitting/receiving mode in the control channel interval of the (N+1)th synchronization interval.

    摘要翻译: 第一路边设备在第N个同步间隔的控制信道间隔中作为发送/接收模式工作,以支持切换。 在这种情况下,与第一路边设备相邻的第二路边设备在第N个同步间隔的控制信道间隔中作为接收模式进行操作。 第一路边设备在第(N + 1)同步间隔的控制信道间隔中作为接收模式进行操作。 在这种情况下,第二路边设备作为第(N + 1)同步间隔的控制信道间隔中的发送/接收模式。

    Apparatus and method for time synchronization and reception apparatus of OFDM system
    9.
    发明授权
    Apparatus and method for time synchronization and reception apparatus of OFDM system 有权
    OFDM系统的时间同步和接收装置的装置和方法

    公开(公告)号:US08270510B2

    公开(公告)日:2012-09-18

    申请号:US12643296

    申请日:2009-12-21

    IPC分类号: H04L27/28

    摘要: An apparatus for time synchronization of an orthogonal frequency division multiplexing (OFDM) system oversamples a received signal using a master clock having a frequency at least four times higher than a minimum sampling frequency in a transmission apparatus, sets one of a plurality of oversampled signals to an on-time signal, and shifts each of the remaining oversampled signals by a predetermined time on the basis of the on-time signal. The apparatus for time synchronization calculates a correlation value by correlating each of the shifted signals and the on-time signal with a previously known signal, detects a maximum energy value among the calculated correlation values, and detects a start point of a frame by comparing the maximum energy value with a predetermined threshold value.

    摘要翻译: 正交频分复用(OFDM)系统的时间同步的装置使用在发送装置中具有比最小采样频率高至少四倍的频率的主时钟对接收信号进行采样,将多个过采样信号中的一个设置为 导通时间信号,并且基于接通时间信号将每个剩余的过采样信号移位预定时间。 用于时间同步的装置通过将每个移位信号和接通时间信号与先前已知的信号相关来计算相关值,检测所计算的相关值中的最大能量值,并通过比较 具有预定阈值的最大能量值。