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    • 29. 发明申请
    • APPARATUS AND METHOD FOR DETECTING PACKET OF ZERO-PADDED OFDM SIGNAL
    • 用于检测零帕值OFDM信号分组的装置和方法
    • US20090147667A1
    • 2009-06-11
    • US12189931
    • 2008-08-12
    • Kyu-Min KANGSang-In ChoSangsung Choi
    • Kyu-Min KANGSang-In ChoSangsung Choi
    • H04J11/00
    • H04L27/2647
    • Provided is an apparatus and method for detecting a packet of a zero-padded OFDM signal, which are capable of determining if a packet exists in a reception (RX) signal by comparing a cross-correlation value of an OFDM signal delayed by a predetermined sample time, e.g., a zero-padded sample time, with a power value of the RX signal, thereby increasing a packet detection probability and preventing a false alarm. The packet detecting apparatus includes: a cross-correlation calculator for calculating a cross-correlation value of a reception signal received from the outside and delaying the calculated cross-correlation value by a predetermined sample time; a power calculator for calculating a power value of the reception signal; and a packet detector for determining if a packet exists in the reception signal by comparing the delayed cross-correlation value with the calculated power value, and detecting the corresponding packet.
    • 提供了一种检测零填充OFDM信号的分组的装置和方法,其能够通过比较延迟了预定样本的OFDM信号的互相关值来确定在接收(RX)信号中是否存在分组 时间,例如零填充采样时间,具有RX信号的功率值,从而增加分组检测概率并防止误报。 分组检测装置包括:互相关计算器,用于计算从外部接收的接收信号的互相关值,并将所计算的互相关值延迟预定采样时间; 功率计算器,用于计算接收信号的功率值; 以及分组检测器,用于通过将延迟的互相关值与所计算的功率值进行比较来确定接收信号中是否存在分组,并检测相应的分组。
    • 30. 发明授权
    • FIR filter of DS-CDMA UWB modem transmitter and control method thereof
    • DS-CDMA UWB调制解调器发射机的FIR滤波器及其控制方法
    • US07436915B2
    • 2008-10-14
    • US11137468
    • 2005-05-26
    • Kyu Min KangBub Joo KangSangsung ChoiKwang Roh Park
    • Kyu Min KangBub Joo KangSangsung ChoiKwang Roh Park
    • H04B1/10
    • H04B1/7176H04B1/7174H04B2201/70707
    • An FIR filter of a DS-CDMA UWB modem transmitter and a control method thereof are disclosed. The FIR filter includes an LUT control device for outputting a resultant value of “0” to all adders if data values corresponding to upper three chips H2, M2 and L2 and lower three chips H, M and L are “000000”, and discriminating which group between a first group and a second group the upper/lower data values belong to if the upper/lower data values are not“000000”. The LUT control device provides upper or lower LUT values to the adders using the upper or lower LUT values as they are, or converts the upper or lower LUT values into 2's complements and provides the converted values to the adders according to the discriminated first or second group.
    • 公开了DS-CDMA UWB调制解调发射机的FIR滤波器及其控制方法。 如果对应于上三个码片H 2,M 2和L 2以及较低的三个码片H,M和L的数据值为“000000”,则FIR滤波器包括LUT控制装置,用于向所有加法器输出结果值“0” 并且如果所述上/下数据值不是“000000”,则鉴别所述上/下数据值属于第一组和第二组之间的组。 LUT控制装置使用上下LUT值向加法器提供上或下LUT值,或者将上或下LUT值转换为2的补码,并根据所识别的第一或第二值向加法器提供转换的值 组。