Electro-Hydraulic Linear Lead Screw Actuator

    公开(公告)号:US20240019017A1

    公开(公告)日:2024-01-18

    申请号:US18101604

    申请日:2023-01-26

    CPC classification number: F16H25/2204 F15B15/14 F15B2015/1495 F16H2025/2062

    Abstract: An electro-hydraulic linear lead screw actuator preferably includes an electric motor device, a hydraulic tube, an actuator lead screw, an actuator screw nut, an actuator rod and at least one external hydraulic flow passage. The actuator lead screw is rotated by the electric motor device. The actuator screw nut preferably includes a piston portion, a first screw nut portion and a second screw nut portion. A lead screw thread is formed through the first and second screw nut portions to threadably receive the actuator lead screw. The actuator rod is retained on the piston portion. Rotation of the electric motor device causes the actuator rod to extend or retract. A first hydraulic chamber is located behind the piston portion and a second hydraulic chamber is located in front of the piston portion. At least one external hydraulic flow passage transfers hydraulic fluid between the first and second chambers.

    MIMO OFDMA and preamble design
    4.
    发明授权
    MIMO OFDMA and preamble design 有权
    MIMO OFDMA和前导码设计

    公开(公告)号:US08964720B2

    公开(公告)日:2015-02-24

    申请号:US12793383

    申请日:2010-06-03

    CPC classification number: H04L27/2602 H04L5/0007 H04L5/0037 H04W72/121

    Abstract: A method is provided for coupling a plurality of access nodes wirelessly to a plurality of access terminals. The method includes dividing up a carrier frequency into a plurality of subbands; scheduling one or more access terminals to share one of the plurality of subbands; and via one of the plurality of access nodes, first communicating with the one or more access terminals over the one of the plurality of subbands. The communicating includes, within the one of the plurality of subbands, time division multiplexing interlaces corresponding to each of the one or more access terminals.

    Abstract translation: 提供了一种用于将多个接入节点无线地耦合到多个接入终端的方法。 该方法包括将载波频率划分成多个子带; 调度一个或多个接入终端以共享所述多个子带中的一个子带; 并且经由所述多个接入节点中的一个接入节点首先通过所述多个子带中的一个子带与所述一个或多个接入终端进行通信。 所述通信在所述多个子带中的一个子带内包括与所述一个或多个接入终端中的每一个对应的时分复用交织。

    Method of transmitting and receiving acknowledgment signal in a wireless communication system
    5.
    发明授权
    Method of transmitting and receiving acknowledgment signal in a wireless communication system 有权
    在无线通信系统中发送和接收确认信号的方法

    公开(公告)号:US08787265B2

    公开(公告)日:2014-07-22

    申请号:US11740271

    申请日:2007-04-25

    CPC classification number: H04L5/0055 H04L1/1607 H04L1/1887 H04L2001/0092

    Abstract: A method of receiving an acknowledgement (ACK) signal from at least one access terminal (AT) in a wireless communication system is disclosed. More specifically, the method includes transmitting at least one packet via a packet data channel from an access network (AN), receiving at least one ACK signal from the at least one AT using same channelization resources, wherein each AT is assigned a code specific to each AT, and identifying the ACK signal corresponding to the transmitted packet from the received at least one ACK signal.

    Abstract translation: 公开了一种在无线通信系统中从至少一个接入终端(AT)接收确认(ACK)信号的方法。 更具体地,该方法包括经由分组数据信道从接入网络(AN)发送至少一个分组,使用相同的信道化资源从至少一个AT接收至少一个ACK信号,其中每个AT分配特定于 每个AT,并且从所接收的至少一个ACK信号中识别与所发送的分组相对应的ACK信号。

    Adaptive acknowledging and power control
    7.
    发明授权
    Adaptive acknowledging and power control 有权
    自适应确认和功率控制

    公开(公告)号:US08428109B2

    公开(公告)日:2013-04-23

    申请号:US12691572

    申请日:2010-01-21

    Abstract: A communication device wirelessly coupled to another communication device. The communication device includes a first transmitter and a first receiver. The first transmitter is configured to transmit first power control bit information to the base station over a reverse link. The first transmitter has a timeline manager, configured to transmit the first power control bit information at a first rate according to a first pattern within a frame. The first receiver is configured to receive second power control bit information from the another communication device over a forward link. The first receiver has an adaptive controller, configured to determine the first rate and the first pattern. The first rate and the first pattern are selected from a plurality of rates and patterns available for transmission of the first power control bit information and the second power control bit information.

    Abstract translation: 无线地耦合到另一通信设备的通信设备。 通信设备包括第一发射机和第一接收机。 第一发射机被配置为通过反向链路向基站发送第一功率控制比特信息。 第一发射机具有时间线管理器,被配置为根据帧内的第一模式以第一速率发送第一功率控制比特信息。 第一接收器被配置为通过前向链路从另一通信设备接收第二功率控制位信息。 第一接收机具有自适应控制器,被配置为确定第一速率和第一模式。 从可用于传输第一功率控制位信息和第二功率控制位信息的多个速率和模式中选择第一速率和第一模式。

    MIMO OFDMA with antenna selection and subband handoff
    8.
    发明授权
    MIMO OFDMA with antenna selection and subband handoff 有权
    MIMO OFDMA与天线选择和子带切换

    公开(公告)号:US08274943B2

    公开(公告)日:2012-09-25

    申请号:US12730426

    申请日:2010-03-24

    Abstract: An access node wirelessly coupled to a plurality of access terminals, having a subband scheduler, a plurality of orthogonal frequency division multiplex elements, and a plurality of antennas. The subband scheduler receives precoded data, and schedules transmission of a preamble signal and a plurality of data streams. The plurality of orthogonal frequency division multiplex elements converts the preamble signal and the plurality of data streams into a corresponding preamble tone and a corresponding plurality of data tones. The preamble tone indicates a mapping of the plurality of data tones to one or more of the plurality of access terminals. The plurality of antennas transmits the corresponding preamble tone and the corresponding plurality of data tones in timely fashion for receipt by the plurality of access terminals. The corresponding preamble tone and the corresponding data tones are transmitted over subbands of a code division multiple access (CDMA)-based carrier frequency.

    Abstract translation: 无线地耦合到具有子带调度器,多个正交频分复用元件和多个天线的多个接入终端的接入节点。 子频带调度器接收预编码数据,并调度前导信号和多个数据流的传输。 多个正交频分多路复用元件将前导码信号和多个数据流转换成对应的前导码音调和对应的多个数据音调。 前导码音指示多个数据音调到多个接入终端中的一个或多个的映射。 多个天线及时发送对应的前同步码音和相应的多个数据音调,以便由多个接入终端接收。 在基于码分多址(CDMA)的载波频率的子带上发送对应的前同步码音和相应的数据音调。

    Peak to average power ratio reduction
    10.
    发明授权
    Peak to average power ratio reduction 有权
    峰均功率比降低

    公开(公告)号:US08175177B2

    公开(公告)日:2012-05-08

    申请号:US12191227

    申请日:2008-08-13

    Applicant: Shu Wang

    Inventor: Shu Wang

    Abstract: The present invention is related to a method for reducing a peak to average power ratio (PAPR) of a signal in a wireless communication system. PAPR is reduced by modulating a data stream into a plurality of symbols, dividing the plurality of symbols into symbol groups, applying a Fourier transform to each of the symbol groups, applying a delay to at least one of the transformed symbol groups, and calculating a peak to average power ratio of the symbol groups.

    Abstract translation: 本发明涉及一种降低无线通信系统中的信号的峰均功率比(PAPR)的方法。 通过将数据流调制成多个符号来减少PAPR,将多个符号划分成符号组,对每个符号组应用傅立叶变换,向至少一个经转换符号组施加延迟,并计算 符号组的峰值与平均功率比。

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