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    • 7. 发明授权
    • System and method for coherent multi-h continuous phase modulation waveform
    • 相干多h连续相位调制波形的系统和方法
    • US07421006B2
    • 2008-09-02
    • US10800691
    • 2004-03-16
    • Paul Edward Voglewede
    • Paul Edward Voglewede
    • H04B1/713
    • H04B1/713H04B1/7156H04L27/201
    • A system and method improves ECCM and data payload for a multi-h continuous phase modulated waveform with the addition of frequency hopping capabilities. The system and method exploit the short constraint length and rotational invariance of the multi-h CPM waveform to enable frequency hopping using current system capabilities. The transmitted data is structured such that the initial phase state of each hopping frame is in the zero state and the final phase state of each hopping frame is cycled to zero by the addition of flushing symbols and transition symbols. The transition symbols allow the oscillator to change frequency without disrupting the phase progression. The system and method uses synchronous demodulation of the transmitted data at a plurality of phase offsets and determines the best phase offset based on the total sum of the branch metrics for each symbol and phase offset. The system and method alternatively demodulated with a phase offset that is tracked and adjusted over each hop by accumulation of the frequency error.
    • 一种系统和方法通过添加跳频功能来改进多小时连续相位调制波形的ECCM和数据有效载荷。 该系统和方法利用多h CPM波形的短约束长度和旋转不变性,以使用当前系统功能启用跳频。 发送的数据被构造成使得每个跳频帧的初始相位状态处于零状态,并且通过添加冲洗符号和转换符号将每个跳变帧的最终相位状态循环为零。 转换符号允许振荡器改变频率,而不会中断相位进展。 该系统和方法使用多个相位偏移的发射数据的同步解调,并且基于每个符号和相位偏移的分支度量的总和来确定最佳相位偏移。 该系统和方法用相位偏移方式交替解调,该相位偏移通过频率误差的累积在每一跳上被跟踪和调整。