Multi-carrier symbol synchronization
    1.
    发明授权
    Multi-carrier symbol synchronization 有权
    多载波符号同步

    公开(公告)号:US06459744B1

    公开(公告)日:2002-10-01

    申请号:US09101881

    申请日:1998-11-03

    IPC分类号: H04L700

    摘要: A method for the time synchronization of a multi-carrier signal receiver consisting of a sequence of symbols each formed by a plurality of carrier frequencies. Each carrier frequency is modulated by a modulation coefficient. The position of some of said carrier frequencies in the time-frequency space is known to the receiver, and said frequencies are reference carrier frequencies. Each reference carrier frequency bears a reference coefficient with a value that is known to the receiver. The method includes a fine synchronization step, wherein the signal transmission channel impulse response is estimated on the basis of reference coefficients belonging to at least two received symbols. The beginning of the useful portion of each of the symbols is determined, and/or a receiver clock is controlled by analyzing the estimate of said impulse response.

    摘要翻译: 一种用于由多个载波频率形成的符号序列组成的多载波信号接收机的时间同步的方法。 每个载波频率由调制系数调制。 时间 - 频率空间中的一些所述载波频率的位置对于接收机是已知的,并且所述频率是参考载波频率。 每个参考载波频率具有接收机已知的值的参考系数。 该方法包括精细同步步骤,其中基于属于至少两个接收符号的参考系数来估计信号传输信道脉冲响应。 确定每个符号的有用部分的开始,和/或通过分析所述脉冲响应的估计来控制接收机时钟。

    Data element interleaving/deinterleaving
    2.
    发明授权
    Data element interleaving/deinterleaving 失效
    数据元素交织/解交织

    公开(公告)号:US06192493B1

    公开(公告)日:2001-02-20

    申请号:US09000273

    申请日:1998-01-27

    IPC分类号: G06F1100

    CPC分类号: H03M13/2785

    摘要: To interleave or deinterleave data elements in first and second blocks transmitted alternately and each having N data elements with rank n lying between 0 and N−1, N being an integer, the data elements with ranks 0, . . . n, . . . N−1 in the first blocks are ordered in accordance with the successive ranks A(0), . . . A(n), . . . A(N−1) and the data elements with ranks 0, . . . n, . . . N−1 in the second block are ordered in accordance with the successive ranks A−1(0), . . . A−1(n), . . . A−1(N−1). A and A−1 are different functions such that A−1(A(n))=n.

    摘要翻译: 为了交织或解交织交替发送的第一和第二块中的数据元素,并且每个具有N个数据元素,秩n位于0和N-1之间,N是整数,数据元素具有等级0。 。 。 n,。 。 。 第一个块中的N-1根据连续的等级A(0)排序。 。 。 A(n),。 。 。 A(N-1)和数据元素的等级为0,。 。 。 n,。 。 。 第二块中的N-1根据连续的等级A-1(0)来排序。 。 。 A-1(n),。 。 。 A-1(N-1)。 A和A-1是不同的功能,使得A-1(A(n))= n。

    Distributed pilot multicarrier signal designed to limit interference affecting said pilots
    3.
    发明授权
    Distributed pilot multicarrier signal designed to limit interference affecting said pilots 有权
    分布式导频多载波信号旨在限制影响所述飞行员的干扰

    公开(公告)号:US07272188B2

    公开(公告)日:2007-09-18

    申请号:US10381178

    申请日:2001-09-20

    IPC分类号: H04L27/28

    CPC分类号: H04L27/2613 H04L27/2698

    摘要: A multicarrier signal, which includes a temporal succession of symbols formed by a set of data elements, each of said data elements modulating a carrier frequency of the signal. The data elements include reference elements called pilots, whereof the value in transmission is known to at least one receiver designed to receive the signal and informative data elements, whereof the value in transmission is not known a priori to the at least one receiver. One of the caffier frequencies is modulated, at a given time, by one of the data elements, being called a carrier. At least one constraint is imposed on the value of at least one of the informative data elements, so as to reduce, in reception, at least one term of interference affecting at least one of the pilots.

    摘要翻译: 一种多载波信号,其包括由一组数据元素形成的符号的时间序列,每个所述数据元素调制该信号的载波频率。 数据元素包括称为导频的参考元件,其中传输中的值对于设计用于接收信号的至少一个接收器和信息数据元素是已知的,其中传输中的值先于该至少一个接收器是未知的。 在给定时间,通过被称为载体之一的数据元素中的一个来调制其中一个卡费尔频率。 对至少一个信息数据元素的值施加至少一个约束,以便在接收时减少影响至少一个导频的至少一个干扰项。

    Process for estimating a parasite phase shift during reception of a multi-carrier signal and the corresponding receiver
    4.
    发明授权
    Process for estimating a parasite phase shift during reception of a multi-carrier signal and the corresponding receiver 有权
    用于在接收多载波信号期间估计寄生相移的处理和对应的接收机

    公开(公告)号:US06529783B1

    公开(公告)日:2003-03-04

    申请号:US09508140

    申请日:2000-03-07

    IPC分类号: G05B1302

    CPC分类号: H04L27/2657 H04L27/2675

    摘要: A method for estimating an interference phase shift when receiving a multicarrier signal formed of a time series of symbols modulating a plurality of carrier frequencies, at least some of the carrier frequencies of at least some of the symbols bearing reference elements, whereof the value at transmission level is known by the receiver carrying out the reception. The phase variation &dgr;n between at least two symbols bearing reference elements is estimated by analysing the reference elements. Each of the reference elements in the estimation is weighted by information representing the noise affecting the carrier frequency bearing the reference element.

    摘要翻译: 一种用于在接收由调制多个载波频率的时间序列符号形成的多载波信号时估计干扰相移的方法,所述多载波信号至少部分载有参考元件的符号中的至少一些的载波频率,其中传输值 由接收机进行接收来知道电平。 通过分析参考元素来估计具有参考元素的至少两个符号之间的相位变化Δtan。 估计中的每个参考元素由表示影响载有参考元素的载波频率的噪声的信息加权。