Compensator for removing nonlinear distortion

    公开(公告)号:US09705477B2

    公开(公告)日:2017-07-11

    申请号:US14845242

    申请日:2015-09-03

    Abstract: The present invention is a computationally-efficient compensator for removing nonlinear distortion. The compensator operates in a digital post-compensation configuration for linearization of devices or systems such as analog-to-digital converters and RF receiver electronics. The compensator also operates in a digital pre-compensation configuration for linearization of devices or systems such as digital-to-analog converters, RF power amplifiers, and RF transmitter electronics. The compensator effectively removes nonlinear distortion in these systems in a computationally efficient hardware or software implementation by using one or more factored multi-rate Volterra filters. Volterra filters are efficiently factored into parallel FIR filters and only the filters with energy above a prescribed threshold are actually implemented, which significantly reduces the complexity while still providing accurate results. For extremely wideband applications, the multi-rate Volterra filters are implemented in a demultiplexed polyphase configuration which performs the filtering in parallel at a significantly reduced data rate. The compensator is calibrated with an algorithm that iteratively subtracts an error signal to converge to an effective compensation signal. The algorithm is repeated for a multiplicity of calibration signals, and the results are used with harmonic probing to accurately estimate the Volterra filter kernels. The compensator improves linearization processing performance while significantly reducing the computational complexity compared to a traditional nonlinear compensator.

    TRANSCEIVER
    44.
    发明申请

    公开(公告)号:US20170149588A1

    公开(公告)日:2017-05-25

    申请号:US15416800

    申请日:2017-01-26

    Inventor: Bo Yang Hua Cai

    Abstract: A transceiver includes: a baseband control apparatus (21); an up-conversion apparatus (22), connected to the baseband control apparatus (21), and configured to perform up-conversion on a baseband signal generated by the baseband control apparatus (21), to obtain an intermediate frequency signal; at least two radio frequency channels (23) disposed in parallel, connected to the up-conversion apparatus (22), and configured to perform frequency conversion, amplification, and filtering on the intermediate frequency signal, to obtain a radio frequency signal corresponding to the frequency band covered by the each radio frequency channel; and an antenna (24), connected in series with an output end of any radio frequency channel of the at least two radio frequency channels (23), and configured to transmit the radio frequency signal obtained by the radio frequency channel. The transceiver enables relatively high wireless communication performance when an ultra wide bandwidth is implemented.

    Method, system and logic for configuring a local link based on a remote link partner

    公开(公告)号:US09608865B2

    公开(公告)日:2017-03-28

    申请号:US14327085

    申请日:2014-07-09

    CPC classification number: H04L41/0813 H04L25/14 H04L41/083

    Abstract: Methods and systems are providing for configuring a port on a network device for communication with a port on a remote device. In one example, the network device receives, by a local port, a message from a physical coding sublayer (PCS) transmitter on the remote partner device. In one aspect, a port configuration module partitions the port to transfer data on a plurality of sub-ports each having a second data transfer rate if it is determined, by the network device that a local PCS receiver failed to align data received in the message. In another aspect, the port configuration module aggregates the plurality of sub-ports of the port to transfer data on a port having the first data transfer rate if it is determined, by the network device, that the local PCS receiver detected a code violation error in the message on at least one of the plurality of sub-links.

    Transmission apparatus
    48.
    发明授权
    Transmission apparatus 有权
    传输装置

    公开(公告)号:US09584307B2

    公开(公告)日:2017-02-28

    申请号:US14594224

    申请日:2015-01-12

    CPC classification number: H04L7/0075 H04J3/0605 H04J3/1652 H04L25/14

    Abstract: A transmission apparatus includes: a plurality of logical lanes; a receiver configured to receive a signal including synchronization information of a frame; a distributor configured to divide data included in the received signal into frame elements and cause the plurality of logical lanes to store the data; and a transmitter configured to transmit the data stored in the logical lanes to lines corresponding to the logical lanes. When the data is stored in the plurality of logical lanes, the distributor groups the logical lanes into a plurality of groups and associates the frame elements with the synchronization information.

    Abstract translation: 发送装置包括:多个逻辑通道; 接收器,被配置为接收包括帧的同步信息的信号; 配置成将包含在接收信号中的数据划分为帧单元并使多条逻辑通道存储数据的分配器; 以及发射机,被配置为将存储在逻辑车道中的数据发送到对应于逻辑车道的线路。 当数据存储在多个逻辑通道中时,分配器将逻辑通道分组成多个组并将帧元素与同步信息相关联。

    METHOD TO ENHANCE MIPI D-PHY LINK RATE WITH MINIMAL PHY CHANGES AND NO PROTOCOL CHANGES

    公开(公告)号:US20160380755A1

    公开(公告)日:2016-12-29

    申请号:US15262280

    申请日:2016-09-12

    Abstract: System, methods and apparatus are described that facilitate transmission of data, particularly between two devices within an electronic apparatus. A first transition may be detected in a signal carried on a data lane of a data communications link or carried on a timing lane of the data communications link and an edge may be generated on a receiver clock signal based on the first transition. Data may be captured from the data lane using the receiver clock signal. The timing lane may carry a clock signal, a strobe signal or another signal providing timing information. The strobe signal may transition between signaling states when no state transition occurs on any of a plurality of data lanes at a boundary between consecutive data periods.

Patent Agency Ranking