APPARATUS AND METHOD FOR TIME-VARYING CYCLIC DELAY DIVERSITY IN A WIRELESS COMMUNICATION SYSTEM
    1.
    发明申请
    APPARATUS AND METHOD FOR TIME-VARYING CYCLIC DELAY DIVERSITY IN A WIRELESS COMMUNICATION SYSTEM 有权
    无线通信系统中时延变化的时变设备及方法

    公开(公告)号:US20090141620A1

    公开(公告)日:2009-06-04

    申请号:US12325457

    申请日:2008-12-01

    IPC分类号: H04J11/00

    摘要: An apparatus and method for Time-Varying Cyclic Delay Diversity (TV-CDD) in a wireless communication system are provided. The method includes, if there is a signal of an antenna path to be transmitted, determining if a current time corresponds to a preamble zone within a frame and, if the current time corresponds to the preamble zone within the frame, shifting a partial antenna path signal forward compared to a reference timing and shifting a remaining partial antenna path signal equally or backward compared to the reference timing.

    摘要翻译: 提供了一种用于无线通信系统中的时变循环延迟分集(TV-CDD)的装置和方法。 该方法包括:如果存在要发送的天线路径的信号,则确定当前时间是否对应于帧内的前导码区域,并且如果当前时间对应于帧内的前导码区域,则移位部分天线路径 信号与参考定时相比,并且与参考定时相比平移或相反地移位剩余的部分天线路径信号。

    APPARATUS AND METHOD FOR INITIAL FRACTIONAL FREQUENCY OFFSET ESTIMATION IN A BROADBAND WIRELESS ACCESS COMMUNICATION SYSTEM
    2.
    发明申请
    APPARATUS AND METHOD FOR INITIAL FRACTIONAL FREQUENCY OFFSET ESTIMATION IN A BROADBAND WIRELESS ACCESS COMMUNICATION SYSTEM 有权
    宽带无线接入通信系统中初始频率偏移估计的装置和方法

    公开(公告)号:US20080192874A1

    公开(公告)日:2008-08-14

    申请号:US12030370

    申请日:2008-02-13

    IPC分类号: H04L7/02

    CPC分类号: H04L27/2676 H04L27/266

    摘要: An apparatus and method for initial fractional frequency offset estimation are provided. In an apparatus for estimating an initial fractional frequency offset in a Broadband Wireless Access (BWA) communication system, the apparatus includes a sample power calculator for calculating a power of input sample data and for calculating an average power of a specific symbol, a power threshold comparator for comparing the sample data power in magnitude with the average power of the specific symbol and for outputting one of an accumulation ON and OFF signal, a first buffer for correlating a last data of the sample data with the sample data and for storing sample data corresponding to a preset number of correlation results, a second buffer for storing sample data corresponding to correlation results other than the sample data stored in the first buffer; and an accumulator for allowing accumulation of sample data stored in the second buffer if the power threshold comparator outputs the accumulation ON signal.

    摘要翻译: 提供了一种用于初始分数频偏估计的装置和方法。 在用于估计宽带无线接入(BWA)通信系统中的初始分数频率偏移的装置中,该装置包括用于计算输入采样数据的功率并用于计算特定符号的平均功率的采样功率计算器,功率阈值 比较器,用于将幅度上的采样数据功率与特定符号的平均功率进行比较,并输出累加ON和OFF信号中的一个;第一缓冲器,用于将采样数据的最后数据与采样数据相关联并用于存储采样数据 对应于预设数量的相关结果;第二缓冲器,用于存储对应于除了存储在第一缓冲器中的采样数据之外的相关结果的采样数据; 以及累加器,用于如果功率阈值比较器输出累加ON信号,则允许累积存储在第二缓冲器中的采样数据。