摘要
提出一种基于柔性形态学预处理的短波信号宽带检测算法。算法基于经典的顶帽变换思想,采用柔性形态学中的开运算估计信号频谱的噪声基底,并对信号基底进行白化处理,进而选用高斯白噪声环境下的检测算法对预处理后的信号频谱图进行检测,实现短波环境下的信号宽带检测。对实际的短波宽带接收信号进行测试,结果表明算法对噪声基底的估计较为准确,克服了不平坦基底的影响,对短波信号的宽带检测概率有所提高。
This paper proposes a detection algorithm for wideband received signal based on soft morphology pre-processing. It uses the open operation of soft morphology to estimate the floor of noise based on the im- proved skeleton extraction algorithm, improved hit or miss transformation to suppress noise and interference, discover the frequency hopping signal, restore the signal image, etc. Simulation results indicate that the algo- rithm can detect and restore FH signals and more effective in discovering the signal in low signal to noise ratio.
出处
《通信对抗》
2013年第2期8-11,共4页
Communication Countermeasures
关键词
短波信号
预处理
宽带检测
柔性形态学
噪声基底
FH signal
pre-processing
wideband detection
soft morphology
floor of noise
