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    • 8. 发明申请
    • DIGITAL RECEIVER SYNCHRONIZATION
    • 数字接收机同步
    • US20070286314A1
    • 2007-12-13
    • US11753728
    • 2007-05-25
    • Stefan HerzingerAndreas MenkhoffStefan MeierNorbert Neurohr
    • Stefan HerzingerAndreas MenkhoffStefan MeierNorbert Neurohr
    • H04L27/06H04L7/00
    • H04L7/042
    • A method is disclosed, including identifying a preamble in a frame, where the preamble has a preamble length 1. M data items received in succession are stored. The m data items once divided into n portions, where the data items in each portion have respectively been received at successive times and where m and n are natural numbers and the following applies to m and n: m>n, m>1, n>1. The n portions are respectively correlated to the expected values to form component correlation results. Delaying the component correlation results, with at least two component correlation results being delayed by different lengths. The method also includes combining the delayed component correlation results to form a total correlation value. The total correlation value is used to determine whether the m received data items contain the preamble of a frame.
    • 公开了一种方法,包括识别帧中的前同步码,其中前导码具有前同步码长度1。 连续接收的M个数据项被存储。 m个数据项一次划分为n个部分,其中每个部分中的数据项分别在连续的时间被接收,并且其中m和n是自然数,并且以下适用于m和n:m> n,m> 1,n > 1。 n个部分分别与预期值相关以形成分量相关结果。 延迟分量相关结果,至少两个分量相关结果被不同长度延迟。 该方法还包括组合延迟分量相关结果以形成总相关值。 总相关值用于确定m个接收的数据项是否包含帧的前同步码。
    • 10. 发明申请
    • Method and circuit for crest factor reduction
    • 波峰因数降低的方法和电路
    • US20050008094A1
    • 2005-01-13
    • US10840946
    • 2004-05-07
    • Ronalf KramerNorbert NeurohrHeinrich Schenk
    • Ronalf KramerNorbert NeurohrHeinrich Schenk
    • H04B1/707H04L27/26H04L27/28
    • H04B1/709H04B2201/70706H04L27/2614
    • The invention relates to a method for production of a transmission signal with reduced crest factor having the following method steps: (a) Provision of a transmission signal which is to be transmitted and has at least one peak value in one area; (b) sampling, in particular oversampling of the transmission signal in order to produce sample values; (c) buffer-storage and/or delay of the transmission signal s1(+) corresponding to the delay in the production of a correction function; (d) production of a weighted correction function by detection of whether the magnitude of the transmission signal or of its sample values has exceeded a first threshold in this area of the transmission signal; calculation of a correction factor; production of a weighted correction function from the correction factor and from a predetermined correction function; (e) additives superimposition of the weighted correction function and the delayed and/or buffer-stored transmission signal in order to produce the transmission signal with a reduced crest factor. The invention also relates to a circuit for crest factor reduction, to a circuit arrangement with such a circuit for crest factor reduction, and to a transmission system.
    • 本发明涉及一种用于生成具有降低波峰因数的传输信号的方法,具有以下方法步骤:(a)提供待传输的传输信号,并且在一个区域中具有至少一个峰值; (b)采样,特别是过采样传输信号,以产生样本值; (c)对应于生产校正功能的延迟的发送信号s1(+)的缓冲存储和/或延迟; (d)通过检测发送信号的幅度或其采样值的大小是否超出了发送信号的该区域中的第一阈值来产生加权校正功能; 校正因子的计算; 从校正因子和预定校正函数产生加权校正函数; (e)加权校正功能和延迟和/或缓冲存储的传输信号的添加剂叠加,以产生具有降低的波峰因数的传输信号。 本发明还涉及一种用于波峰因数降低的电路,一种具有这种用于波峰因数降低的电路的电路装置以及一种传输系统。