The Properties of Higher-order Reassigned Local Polynomial Periodogram
Reassigned operation is a technique to improve the representation quality of time-varying signals in the time-frequency domain.This paper presents the arbitrary higher-order reassigned local polynomial periodograms (LPPs) and their properties.The modified Wigner-Ville distribution is defined and its properties are discussed as a basis to derive the properties of the higher-order reassigned LPPs.The higher-order reassigned LPPs are shown to have desirable properties such as the non-negativity,non-bilinearity,time and frequency shifts invariance,time-scaling property and energy conservation.The property to perfectly localize the corresponding order polynomial phase signals is also shown to obtain improved signal concentration in the time-frequency domain.
Reassignment method local polynomial Fourier transform local polynomial periodogram
Xiumei Li Guoan Bi
School of Information Science and Engineering, Hangzhou Normal University, China School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore
国际会议
the 25th Chinese Control and Decision Conference(第25届中国控制与决策会议)
贵阳
英文
2447-2452
2013-05-01（万方平台首次上网日期，不代表论文的发表时间）