基于相位差分方法的BPSK引信信号m序列识别
doi: 10.3724/SP.J.1146.2005.00706
Identification of m-Sequence for BPSK Fuse Signal Based on Phase-Difference Method
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摘要: 该文根据二相移相键控(BPSK)引信信号脉冲相位差分和m序列的一一对应关系，通过求解脉冲相位差分方程组来得到m序列。首先，通过FFT求得脉冲相位，然后分别采用了一阶相位差分方法和二阶相位差分方法来对m序列进行识别。经计算机仿真验证，该方法是完全正确的。最后对该方法进行了可靠性分析，分析表明，即使某一个码元由于对应的脉冲相位测量误差很大而被错误识别，也不会对后续的PN码识别产生影响，说明该方法具有很高的可靠性。Abstract: According to one-to-one relationship of the Binary-Phase-Shift-Keying (BPSK) fuse signals pulse-phase difference and the m-sequence, the m-sequence can be obtained by solving the phase-difference equations. First, the pulse phase is measured by FFT. Then, first-order phase difference method and second-order phase difference method separately are applied to identify the m-sequence. The computer simulation proves the method to be completely correct. Finally, the reliability of the method is analyzed to find that, even if any Pseudo Noise (PN) code is mistakenly identified because of large measuring error of the corresponding pulse phase, it has no influence on identification of the later codes. This indicates that the method has high reliability.
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