| 摘要: |
| 针对线性调频（LFM）脉冲信号的实时检测问题，提出了一种基于多重累积相关的检测算法
。该
算法根据信号与噪声具有不同的统计特性，利用LFM信号的累积相关高于噪声的累积相关的
原理实现LFM脉冲信号的检测。通过二次累积改善累积相关输出的信噪比，实现对多分
量微弱LFM脉冲信号的有效检测。该算法复杂度低，可以通过递推运算减小运算量，便于
实时处理。仿真实验结果验证了算法的有效性。 |
| 关键词: 信号检测 线性调频 累积相关 低信噪比 实时处理 |
| DOI： |
|
| 基金项目: |
|
| Real-time Detection of LFM Pulse Signal Based on Cumulate-Correlation |
| YAO Shan-feng,ZENG An-jun,YAN Hang,TONG Wu-qin,YU Fei-qun |
| (National Defense Key Lab on Blind Signal Processing, Chengdu 610041, China) |
| Abstract: |
| In order to realize the real-time detection of linear frequency modulated(LFM)
pulse signal,a method based
on cumulate-correlation is proposed. According to the different statistica
l characteristic between signal and noise,detection of LFM pulse sig
nal is realized based on the theory that the cumulate-correlation of LFM signal
is higher than that of noise. Through multiple cumulate correlation to improve o
utput SNR, the algorithm
can effectively detect multicomponent weak LFM pulse signals. In addition, the p
roposed algorithm has lower complexity.A recursion algo
rithm is used to reduce computation to realize realtime processing. The validity
of the proposed algorit
hm is proved by simulation. |
| Key words: signal detection LFM cumulate-correlation low SNR realtime processing |
