摘要
分析了时域重叠的多信号(LFM和正弦波信号)经过自相关运算以后的包络特征,根据包络的跳变特征进行信号切割,对每段信号分别进行处理,得到它们的起、止时间和所含有的信号参数。通过数据拟合,将分段信号进行整合,最终得到各个信号的完整结果。仿真结果表明该方法在低信噪比条件下具有较好的性能。
A separation algorithm is used to analyze the envelopment character of LFM signals and sine signals correlated in time domain. According to the leap character of the envelopment, the original mixed signal is seperated into several segments and same process is performed on every segment. The beginning and ending moments, and the parameters of different signals on the same signal segement can be obtained. The information of every component in the mixed signal can be totally obtained by fitting the estimation results of different segements. Simulation results confirm its availability under the situation of low signal to noise ratio.
出处
《数据采集与处理》
CSCD
北大核心
2005年第2期186-192,共7页
Journal of Data Acquisition and Processing
关键词
信号分离
相关运算
时域
参数估计
信号拟舍
signal separation
correlation
time domain
parameter estimation
signal fitting
