摘要： 分析待探测的瞬态光信号，对其进行频谱估计，推导出空间瞬态光信号是一种随机信号。通过分析基于FLOM估计的共变谱估计，得出当 <1时，这种方法并不适应。为此，提出一种分数低阶协方差谱的估计方法，对这2种 稳定分布噪声中正弦信号的估计与分辨进行仿真实验，结果表明该方法可以获得较好的谱估计性能，对 稳定分布噪声具有广泛适用性，且瞬态光信号为 稳定分布噪声。
关键词:
瞬态光信号,
谱,
稳定分布,
分数低阶协方差
Abstract: The frequency features of the optical transient signal are analyzed and the spectrum is estimated. The result is that the signal of spatial transient optical is random signal. The analysis of the covariation-spectrum estimations based on FLOM, finding that this method is not applicable when α<1. A method of estimation of Fraction Low Order Covariation(FLOC) is proposed. The comparison of emulator results of two spectrum estimations show the method presents a good capability and it can be widely applied to α-stable distribution. Through the comparison, concluding that the optical transient signal is α-stable distribution.
Key words:
transient optical signal,
α-spectrum,
stable distribution,
Fraction Low Order Covariation(FLOC)
中图分类号:
陈朝峰, 郭书超, 查代奉. 基于α稳定分布的空间瞬态光频谱估计[J]. 计算机工程, 2011, 37(5): 94-96.
CHEN Chao-Feng, GUO Shu-Chao, CHA Dai-Feng. Frequency Spectrum Estimation for Spacial Transient Optical Based on α-Stable Distribution[J]. Computer Engineering, 2011, 37(5): 94-96.