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In this article the results of testing of numerical methods of solution of differential equations describing the systems with chaotic dynamics in MATLAB are discussed. The results of evaluation of the actual error, the global error and root-mean-square error of the numerical solution of the test differential equation system are discussed. The results of evaluation of the main radio technical parameters...
This work addresses the problem of the unbalanced three-phase system accurate estimation parameter. This problem occurs in various fields of applications, among which is Smart Grid. It is well known to use the unbalanced three phase power system for modeling in smart grid applications. In this work, we propose a new analytical method in order to obtain an accurate estimation of the unbalanced three-phase...
In this paper, we propose a test of hypothesis improvement, by phase study of the analytical cross-correlation function in acoustical detection application. Robustness of false alarms probability for the Time Of Arrival (TOA) estimation represents the goal of the proposed method. After signal detection, TOA will be used to localize one receiver, thanks to a grid of transmitters (more than 3), thanks...
The presence detection of communication signals is the precondition and basis of information retrieval, which plays an important role in the signal processing. A new algorithm based on the fluctuation of the correlation function of the received signals in time domain is proposed. The algorithm, employing the first-order fluctuation function of the correlation function as the detection function and...
This paper introduces an algorithm for estimating loop-delay in digital predistortion (DPD) system. The algorithm includes two parts: integer loop-delay estimation and fractional loop-delay estimation. The integer loop-delay estimation adopts correlation function and digital differentiator to search the estimate. The fractional part gets the convergence value through LMS algorithm based on interpolation...
Cross-correlation of coherent wave fronts of acoustic ambient noise fields gives an estimation of the bottom profile of ocean. Hydrophones are used to record the noise fields. Averaging time needed for estimating depth of sea bed depends on the number of coherent wave fronts extracted from the noise fields. In the current approach of depth estimation if only two hydrophones are used to record the...
The estimation of pseudo random sequence is of great importance of the security in DS-CDMA system, which remains a hot research topic in reconnaissance and supervision of wireless communication. In DS-CDMA system, the information sequences of different users are independent and the pseudo random sequences are none correlation, thus Independent Component Analysis (ICA) technology can be adopted to...
Based on the cooperation model of small and medium-sized logistics enterprises' alliance, this paper designs the indexes for SMLEA member selection to test optional enterprises in the association. And the matter-element model and relevant correlation functions are built by applying the extension theory. By calculating and comparing integrated correlation of the optional companies' content members,...
Using of chirp-type excitations for the fast broadband measurement and estimation of the complex bioimpedance is discussed in this paper. The proposed method includes cross-correlation of the excitation (reference) and response signals with a subsequent Fourier analysis of the obtained correlation function. It is shown that the phase response can be especially convenient for estimating of the state...
Echo path estimation in echo canceling for teleconference system is a problem in double-talk condition. The correlation function based algorithms were defined by the authors to solve this problem. In this paper, in order to improve the convergence speed of correlation function based algorithm, we propose a new modified proportionate step-size adaptation method, and then implement it into frequency...
In this paper we describe an automatic voice-to-MIDI transcription procedure. In particular we propose a note segmentation method based on the analysis of the signal envelope and its derivative. The pitch of the segmented note is extracted with a novel generalized correlation function called correntropy function achieving high accuracy with the same computational cost of traditional correlation based...
Robust, computationally efficient and accurate estimation of 2D speckle pattern displacement is the key signal processing task in most digital speckle photography principles. State-of-the-art techniques are based on the evaluation of correlation functions with high computational complexity when sub-pixel accuracy is needed. Within this paper we describe a new algorithm based on the evaluation of 2D...
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