Identifying alignment markers using partial correlators

    公开(公告)号:US11824761B1

    公开(公告)日:2023-11-21

    申请号:US16199744

    申请日:2018-11-26

    Applicant: Xilinx, Inc.

    Inventor: Ben J. Jones

    CPC classification number: H04L45/24 H04L1/0045 H04L25/14

    Abstract: Methods and apparatus for detecting alignment markers in received data streams received via a plurality of data lanes are disclosed. Corresponding data streams may be received via respective data lanes in the plurality of data lanes, where each data stream includes alignment markers delineating data frames, and each alignment marker has a predefined bit pattern. For each respective data lane, a determination is made whether a specified portion of the received data stream has at least a threshold degree of similarity with a portion of the predefined bit pattern. In response to determining, for one of the plurality of data lanes, that the specified portion has at least the threshold degree of similarity, a frame boundary may be determined based on the specified portion, and a verification may be performed, that the specified portion of the received data stream corresponds to an alignment marker.

    METHOD AND APPARATUS FOR AUTOMATIC SKEW COMPENSATION

    公开(公告)号:US20180041330A1

    公开(公告)日:2018-02-08

    申请号:US15554867

    申请日:2016-04-05

    Inventor: Sung-Oh YIM

    CPC classification number: H04L7/0041 G06F13/4072 H04L7/04 H04L25/14

    Abstract: The present invention relates to a method and an apparatus for automatic skew compensation. The apparatus according to the present invention comprises: a skew compensating part configured to receive a high speed data signal and output a plurality of delay data signals having different delay times; a start code detecting part configured to detect a start code from the plurality of delay data signals; and a control part configured to determine a skew delay time depending on signal reception quality which is determined on the basis of the number of start codes normally detected for each different delay time. The apparatus may further comprise a packet start detecting part configured to receive an LP signal separated from an MIPI D-PHY and count the number of received packets. The packet start detecting part receives the LP signal separated from the MIPI D-PHY, and counts the number of packets received at every preset quality evaluation time by detecting the start location of a packet according to the state of the LP signal. The signal reception quality is obtained using the number of normally detected start codes and the number of received packets received and counted at every quality evaluation time. The present invention can automatically compensate the skew between a data signal and a clock signal in an MIPI D-PHY reception system.

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