摘要
应用FFT测脉冲初始相位并计算相位序列的二阶差分来识别伪码脉冲引信信号m序列,在信号环境复杂、信噪比较低的情况下,存在误差较大、识别正确率低的问题。为此,提出在测脉冲初始相位的同时,通过检测测频误差来对消测相误差,对相位序列二阶差分进行校正的相位校正二阶差分方法来识别信号m序列。在不同信噪比条件下,仿真结果显示相位校正二阶差分识别算法能取得更好的识别效果。
The second-order difference of pulse initial phase measured by FFT has being applied to identify the m-sequence for PN pulse fuze,in the case of complex signal environment and low signal noise ratio,this method is of big deviation and low recognition accuracy.Referred to the phase offset obtained by detecting the deviation of frequency measurement,we designed an algorithm on second-order phase-difference with phase compensation to identify the signal of m-sequence.The computer simulation of different SNRs indicated that the algorithm provided a better identification effect.
出处
《探测与控制学报》
CSCD
北大核心
2010年第6期42-46,共5页
Journal of Detection & Control
关键词
伪码脉冲引信
m序列识别
相位差分
the PN pulse fuze
identification of m-sequence
phase-difference
