强噪声背景下微弱信号检测方法研究

Study on Weak Signal Detection Method in A Stronger Noise Backgroung

研究了用于微弱信号检测的自相关法、多重自相关法及双谱估计法,并介绍了各种技术的算法及特点。最后利用Matlab进行仿真并对仿真结果进行比较,结果表明:双谱估计检测法在检测强噪声背景下微弱信号方面对噪声有较强的抑制能力,能有效地检测出微弱信号。

Methods of auto correlation, multi- layer autocorrelation and bispectrum estimation that can be used in weak signal detection are studied in this paper with algorithm, and characteristics of each technology, Simulation is made by using MatLab and the results are compared with each means. Simulation results show that bispectrum estimation can restrain noise strongly, detect weak signal effectively.