信道化造成的虚假信号处理方法研究

doi:10.16180/j.cnki.issn1007-7820.2021.08.005

摘要/Abstract

摘要：

针对信道化处理信号时会造成跨信道分裂信号、兔耳效应等虚假信号的问题,文中提出了一种利用虚假信号的参数特征进行虚假信号消除的方法。该方法根据相邻信道的跨信道分裂信号时频域交叠严重,对信道化检测结果的跨信道分裂信号进行拼接融合;根据兔耳效应虚假脉冲的幅度、脉宽等参数远小于原信号的幅度、脉宽且出现和结束时刻均在原信号上升沿和下降沿附近,对信道化检测结果的兔耳脉冲直接剔除,得到最终检测结果。实验结果表明,所提方法能有效实现虚假信号的消除,对信道化的输出进行处理后能得到正确的检测结果。

关键词: 信道化, 虚假信号, 跨信道, 兔耳效应, 线性调频, 宽带信号, 电子侦察, 信号检测

Abstract:

In view of the problem of false signals such as cross-channel split signals and rabbit ear effect when using channelization to process signals, this study proposes a method for eliminating false signals by using the parameter characteristics of the false signals. According to the serious time-frequency overlap of the cross-channel split signals of adjacent channels in the method, the cross-channel split signals of the channelization detection result are spliced and fused. According to the parameters such as the amplitude and pulse width of the false pulse of the rabbit ear effect, which are much smaller than the amplitude and pulse width of the original signal, and the occurrence and end times are near the rising and falling edges of the original signal, the rabbit ear pulses of the channelization detection result are directly eliminated. The final detection result is obtained through the above processing. Experimental results show that the method proposed in this study can effectively eliminate false signals and obtain correct detection results after processing the channelized output.

Key words: channelization, false signals, cross-channel, rabbit ear effect, linear frequency modulation, wideband signals, electronic reconnaissance, signal detection

中图分类号:

TN911.7

吴贞宇,夏厚培. 信道化造成的虚假信号处理方法研究[J]. 电子科技, 2021, 34(8): 25-30.

WU Zhenyu,XIA Houpei. Research on Processing Methods of False Signals Caused by Channelization[J]. Electronic Science and Technology, 2021, 34(8): 25-30.

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信道编号	频率范围/MHz
1	0.0~12.5
2	12.5~25.0
3	25.0~37.5
4	37.5~50.0
5	50.0~62.5
6	62.5~75.0
7	75.0~87.5
8	87.5~100.0

子信道编号	起始时间 /μs	结束时间 /μs	起始频率 /MHz	结束频率 /MHz
3	10.620	16.835	30.120	37.500
4	16.460	26.720	37.500	50.000
5	26.565	30.645	50.000	55.240

所在信道编号	起始时间/μs	脉宽/μs
3	10.080	0.170
3	30.010	0.065
4	10.105	19.955
5	29.990	0.100

子信道编号	起始时间 /μs	结束时间 /μs	起始频率 /MHz	结束频率 /MHz
3	10.115	10.200	40.230	40.310
4	10.090	20.215	40.120	50.290
5	20.065	30.155	50.070	60.340
6	30.110	30.175	60.070	60.190

子信道编号	起始时间 /μs	结束时间 /μs	起始频率 /MHz	结束频率 /MHz
4	10.090	20.215	40.120	50.290
5	20.065	30.155	50.070	60.340