METODO Y APARATO PARA ESTIMACION E IGULACION EN UN CANAL RECEPTOR DE MDFO.

    公开(公告)号:ES2260821T3

    公开(公告)日:2006-11-01

    申请号:ES98402253

    申请日:1998-09-11

    Applicant: MOTOROLA INC

    Abstract: Aparato 100 para estimar un canal y realizar una igualación en un esquema de modulación de OFDM en el que un símbolo de bloque recibido r{sup,ig}(k) incorpora un prefijo redundante r{sup,gi}{sub,0}(k), r{sup,gi}{sub,1}(k), r{sup,gi}{sub,2}(k),... r{sup,gi}{sub,D-1(k) además de los datos útiles a enviar, comprendiendo el aparato medio de almacenamiento y detección de prefijo redundante 60, 70 para detectar y almacenar el prefijo redundante además de los datos útiles y medios de procesamiento 110 para procesar el prefijo redundante para derivar información ^C{sub,0}, ^C{sub,1},...^C{sub,D} alrededor del canal.

    A TRANSMITTER AND A RECEIVER FOR COMMUNICATING A SIGNAL FROM MULTIPLE ANTENNAS USING A PREAMBLE
    14.
    发明申请
    A TRANSMITTER AND A RECEIVER FOR COMMUNICATING A SIGNAL FROM MULTIPLE ANTENNAS USING A PREAMBLE 审中-公开
    使用前置信号从多个天线传播信号的发射机和接收机

    公开(公告)号:WO2006052774A3

    公开(公告)日:2006-08-03

    申请号:PCT/US2005040076

    申请日:2005-11-04

    CPC classification number: H04L27/2613 H04J13/18 H04L1/0618

    Abstract: A transmitter comprises a transmit processor (105), preamble inserters (107, 109) and transmit units (113, 117) which are operable to transmit sub-signals from the antennas (115, 119). A preamble set comprising an individual preamble for each antenna generated by a preamble generator (111). Each of the individual preambles comprise first and second sections. The first section comprises a first data sequence, different for each antenna, and is selected from a predetermined set of preamble sequences. The first data sequence may comprise only time domain symbols belonging to the alphabet [1,-1, i,-i,0]. The second section comprises repetitions of a predetermined second data sequence where each repetition is weighted by a coefficient that is different for each antenna. Weighting may be by coefficients of different rows of a Walsh Hadamard matrix. The second data sequence may comprise only frequency domain symbols belonging to the alphabet of [1,-1,0].

    Abstract translation: 发射机包括发射处理器(105),前导码插入器(107,109)和可操作以从天线(115,119)发送子信号的发射单元(113,117)。 一种前置码集,其包括由前导码生成器(111)生成的每个天线的单独前导码。 每个单独的前导码包括第一和第二部分。 第一部分包括对于每个天线不同的第一数据序列,并且从预定的前导序列组中选择。 第一数据序列可以仅包括属于字母表[1,-1,i,-i,0]的时域符号。 第二部分包括预定的第二数据序列的重复,其中每个重复被对于每个天线不同的系数加权。 加权可以是Walsh Hadamard矩阵的不同行的系数。 第二数据序列可以仅包括属于[1,-1,0]的字母表的频域符号。

    ITERATIVE CHANNEL ESTIMATION IN MULTICARRIER RECEIVERS
    15.
    发明申请
    ITERATIVE CHANNEL ESTIMATION IN MULTICARRIER RECEIVERS 审中-公开
    多媒体接收机中的迭代信道估计

    公开(公告)号:WO2004040834A3

    公开(公告)日:2004-07-15

    申请号:PCT/EP0350774

    申请日:2003-10-31

    CPC classification number: H04L27/2647 H04L25/0236

    Abstract: A method of channel estimation comprises the steps of receiving a signal and applying a fast fourier transform (FFT) to obtain a plurality of frequency domain sub-carriers. Probabilities of coded bits are produced and channel coefficient estimation is performed for each of the plurality of frequency domain sub-carriers usung channel coefficient estimates of other ones (preferably all others) of the plurality of frequency domain sub-carriers, which are based on the probabilities on coded bits. An OFDM communication unit and OFDM communication system are also provided.

    Abstract translation: 一种信道估计方法包括以下步骤:接收信号并应用快速傅里叶变换(FFT)以获得多个频域子载波。 产生编码比特的概率,并对多个频域子载波中的每一个执行信道系数估计,以便基于多个频域子载波的多个频域子载波中的其他(频率所有其他)的信道系数估计 编码位的概率。 还提供OFDM通信单元和OFDM通信系统。

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