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377 条记录 (耗时 0.021 秒)

    METHOD FOR AUTOMATICALLY FINDING THE OPTIMUM SAMPLING POINT IN AN EYE DIAGRAM
    71.
    发明授权
    METHOD FOR AUTOMATICALLY FINDING THE OPTIMUM SAMPLING POINT IN AN EYE DIAGRAM 有权

    公开(公告)号：EP3145106B1

    公开(公告)日：2018-08-01

    申请号：EP16189978.6

    申请日：2016-09-21

    申请人： Tektronix, Inc.

    发明人： POULO, Richard

    IPC分类号： H04L7/00 ,  H04L7/08 ,  H04L25/49 ,  H04L1/20

    CPC分类号： H04L7/08 ,  H04L1/20 ,  H04L1/205 ,  H04L7/0087 ,  H04L25/4917

    摘要： A system and method of multi-symbol communications from a transmitter to a receiver via a channel, including transmitting signals as a waveform representing a sequence of symbols, each symbol of unit-interval duration and each symbol associated with its own signal level. This method includes graphically representing the waveform as an eye diagram having a horizontal time axis and a vertical signal level axis arranged to form one or more eyes, and using a sampling point in each eye to determine which signal the waveform in any unit interval represents. Each sampling point has a phase and a decision threshold. The method further includes identifying the eyes in the eye diagram, finding a convex polygonal region fitting within each eye, finding a largest rectangle fitting the convex polygonal region of each eye, and positioning the sampling point in each eye at a center of the rectangle of that eye.

    SYSTEMS AND METHODS FOR IMPLEMENTING AN OPEN LOOP ARCHITECTURE IN A WIRELESS COMMUNICATION NETWORK
    75.
    发明公开
    SYSTEMS AND METHODS FOR IMPLEMENTING AN OPEN LOOP ARCHITECTURE IN A WIRELESS COMMUNICATION NETWORK 有权
    系统和方法用于实现具有开环的架构在无线通信网络

    公开(公告)号：EP1719274A4

    公开(公告)日：2015-07-29

    申请号：EP05723727

    申请日：2005-02-23

    申请人： INTELLECTUAL VENTURES HOLDING 73 LLC

    发明人： LAKKIS ISMAIL

    IPC分类号： H04L7/04 ,  H04B1/69 ,  H04J3/06 ,  H04L7/08 ,  H04L27/26

    CPC分类号： H04L7/041 ,  G01S5/0226 ,  G01S5/10 ,  G01S5/14 ,  H04L7/08 ,  H04L27/2613 ,  H04L27/2675

    摘要： Apparatus and methods of communication are provided. In one embodiment, a communication frame is generated and includes a synchronization section, and at least two data sections and at least two preamble sections. A receiver synchronizes with a transmitter using the synchronization section, and may also re-synchronize with the transmitter using at least one preamble section. In another embodiment, the length of the data sections are selected to ensure that drift between the receiver and transmitter will be minimal before re-synchronization. Additional embodiments of the invention may employ ultra-wideband communication technology. This Abstract is provided for the sole purpose of complying with the Abstract requirement rules that allow a reader to quickly ascertain the subject matter of the disclosure contained herein. This Abstract is submitted with the explicit understanding that it will not be used to interpret or to limit the scope or the meaning of the claims.

    Transmitter, receiver, mobile communication system and synchronization channel
    76.
    发明公开
    Transmitter, receiver, mobile communication system and synchronization channel 有权
    发射机，接收机，移动通信系统和同步信道

    公开(公告)号：EP2790339A2

    公开(公告)日：2014-10-15

    申请号：EP14170588.9

    申请日：2006-06-08

    申请人： NTT DOCOMO, INC.

    发明人： Tanno, Motohiro ,  Higuchi, Kenichi ,  Sawahashi, Mamoru ,  Kishiyama, Yoshihisa

    IPC分类号： H04J11/00 ,  H04B1/707 ,  H04L7/08

    CPC分类号： H04L27/2656 ,  H04B1/7075 ,  H04L5/0026 ,  H04L5/0048 ,  H04L7/08 ,  H04L25/0204 ,  H04L25/0226 ,  H04L25/0228 ,  H04L25/03866 ,  H04L27/2613 ,  H04L27/2627 ,  H04L27/2662

    摘要： A transmitter comprises a generation unit configured to generate multiple OFDM symbols included in a predefined time unit and a transmitting unit configured to transmit the multiple OFDM symbols generated at the generation unit, wherein the generation unit arranges a primary synchronization channel at an end OFDM symbol in the predefined time unit, the primary synchronization channel being generated based on one sequence, and a secondary synchronization channel, where two types of sequences are alternately arranged in a frequency domain, at an OFDM symbol preceding the OFDM symbol where the primary synchronization channel is arranged, and a cyclic prefix is arranged for each of the multiple OFDM symbols, and any of specified different cyclic prefix lengths is used.

    摘要翻译： 发射机包括：生成单元，配置为生成包括在预定时间单元中的多个OFDM符号;以及发送单元，配置为发送在生成单元生成的多个OFDM符号，其中，生成单元将主同步信道布置在 所述预定义时间单元是基于一个序列生成的主同步信道，以及在布置所述主同步信道的所述OFDM符号之前的OFDM符号处的辅同步信道，其中两种类型的序列在频域中交替地布置 并且针对多个OFDM符号中的每一个配置循环前缀，并且使用指定的不同循环前缀长度中的任何一个。