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    • 5. 发明授权
    • Method for estimating the frequency shift of a CPFSK signal
    • 估计CPFSK信号频移的方法
    • US07106807B2
    • 2006-09-12
    • US10168122
    • 2000-12-13
    • Andre′ Neubauer
    • Andre′ Neubauer
    • H03K7/06H04L27/20
    • H04L27/2332H04L2027/0036H04L2027/0065
    • A method for estimating the frequency shift of a CPFSK signal includes scanning the CPFSK signal. Intermediate signal values are determined for the scanned CPFSK signal. An estimated value (ν) is determined for the frequency shift of the CPFSK signal by assessing a predefined number of L0 consecutive intermediate signal values. An integer delay parameter D is specified. Intermediate signal values for intervals k·T+τ are determined in each case from scanning values of the CPFSK signal obtained for intervals k·D·T+τ and [k−1]·D·T+τ, whereby T designates a scanning period of the scanned CPFSK signal, k is a scanning index and τ is a delay constant. The estimated value (ν) for the frequency shift is determined from the intermediate signal values for intervals i·D·T+τ with i=0 . . . L0−1. The integer delay parameter D is variable and is selected depending on the type of CPFSK modulation used for the CPFSK signal.
    • 用于估计CPFSK信号的频移的方法包括扫描CPFSK信号。 为扫描的CPFSK信号确定中间信号值。 通过评估预定数量的L 0 0连续中间信号值来确定CPFSK信号的频移的估计值(nu)。 指定整数延迟参数D。 在每个情况下,由间隔kDT + tau和[k-1]·D·T +τ获得的CPFSK信号的扫描值确定间隔k.T +τ的中间信号值,由此T表示 扫描的CPFSK信号,k是扫描索引,τ是延迟常数。 频移的估计值(nu)由i = 0的间隔i.D.T +τ的中间信号值确定。 。 。 L <0> -1。 整数延迟参数D是可变的,并且根据用于CPFSK信号的CPFSK调制的类型来选择。