Impact of window function on statistical index of quality of spectral estimates of poliharmonic acoustic signals
Journal Title: Вісник Житомирського державного технологічного університету. Серія: Технічні науки - Year 2016, Vol 78, Issue 3
Abstract
As the role of passive acoustic systems of extracting information is increasing in military sphere the interest to algorithms of polyharmonic acoustic signals detection has grown greatly. The difficulty of detecting such signals is caused by a priory uncertainty of its structure. Using statistical index of quality (SIQ) of spectral estimates for adaptive thresholding simplify implementing this task. The paper gives the expressions for SIQ computation of periodogram and its overall values are defined for cases of harmonic oscillation and white noise. It is proved that SIQ pulsation level (difference between its’ maximum and minimum values) is connected to pulsation level of overall amplitude spectrum of Fast Fourier Transform. Ascertained that SIQ pulsation level decreases with spreading main lobe of window function in frequency domain. We proposed to use for weighting polyharmonic acoustic signals Tukey, Cauchy or Dolph–Chebyshev windows, which simultaneously provide minimal SIQ pulsation level and coefficient of signals’ energy losses.
Authors and Affiliations
D. V. Piaskovskyi, N. V. Bugaеv
Keywords
Related Articles
- EP ID EP254531
- DOI -
- Views 114
- Downloads 0
Using the USB-receivers based on demodulator RTL2832U in the educational process
The application of USB-receivers based on the demodulator RTL2832U as a software-defined radio (SDR), which can serve as a low-cost platform for a wide range of interesting learning tasks in carrying out laboratory works...
The application of deep confidence network in the problem of image recognition
In order to study the concept of deep learning, in particular the substitution of multilayer perceptron on the corresponding network of deep confidence, computer simulations of the learning process to test voters was car...
Mathematical model of heat exchange in the turnover of the surface grinding machine
A mathematical model of the heat transfer process in the coolant tank of a circular grinding machine is proposed. The sequence and dependencies for calculating the coolant temperature at the inlet to the pump of the cool...
Peculiarities of transport exploitation of general purpose in technology of intelligent transport systems
The key features of the technological processes function regarding the control of the public transport using the intelligent transport systems were analyzed. The attributes of the groups uniting within a domain on the gr...
Determination of the complexity of bus routes under operating conditions
Technical operation, as a subsystem of road transport, significantly influence the efficiency of the transportation process and requires constant perfection, namely due to objective rationing (adjustment) of performance...