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    • 6. 发明授权
    • Apparatus and method for reducing PAPR in an OFDM system
    • OFDM系统中减少PAPR的装置和方法
    • US08208567B2
    • 2012-06-26
    • US12253174
    • 2008-10-16
    • Hae-Dong YeonIn-Hyoung KimJin-Woo RohSung-Soo KimBong-Gee SongJong-Han Lim
    • Hae-Dong YeonIn-Hyoung KimJin-Woo RohSung-Soo KimBong-Gee SongJong-Han Lim
    • H04K1/10H04L27/28
    • H04L27/2614H04L25/03343
    • An apparatus and method for reducing a Peak-to-Average Power Ratio (PAPR) are provided. The apparatus includes a gain processor for multiplying time signals in paths by gains set for respective paths, a delay processor for delaying gain-multiplied signals in second to last paths except for a first path by time delays set for respective second to last paths, a summer for summing the gain-multiplied signal for the first path received from the gain processor and the delayed signals received from the delay processor, a PAPR processor for measuring a PAPR of the summed signal received from the summer, for comparing the measured PAPR with a target PAPR, and for requesting one or more changes of at least one of the gain and time delay of each path, and a gain delay controller for changing the at least one of the gain and the time delay of each path according to the request received from the PAPR processor and for controlling the gain processor and the delay processor according to the change.
    • 提供了降低峰值功率比(PAPR)的装置和方法。 该装置包括一个增益处理器,用于通过针对相应路径设定的增益对路径中的时间信号进行乘法;延迟处理器,用于通过为相应的第二到最后路径设置的时间延迟来延迟除了第一路径之外的第二到最后路径中的增益相乘信号的延迟处理器 用于将从增益处理器接收的第一路径的增益信号和从延迟处理器接收的延迟信号相加的加法器,用于测量从夏季接收到的求和信号的PAPR的PAPR处理器,用于将测量的PAPR与 目标PAPR,并且用于请求每个路径的增益和时间延迟中的至少一个的一个或多个改变;以及增益延迟控制器,用于根据接收的请求来改变每个路径的增益和时间延迟中的至少一个 来自PAPR处理器,并且用于根据该改变来控制增益处理器和延迟处理器。
    • 10. 发明授权
    • Apparatus and method for initial fractional frequency offset estimation in a broadband wireless access communication system
    • 宽带无线接入通信系统中初始分数频偏估计的装置和方法
    • US07907682B2
    • 2011-03-15
    • US12030370
    • 2008-02-13
    • In-Chun LimYong-Sun HwangBong-Gee Song
    • In-Chun LimYong-Sun HwangBong-Gee Song
    • H04L27/00
    • H04L27/2676H04L27/266
    • 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.
    • 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。