A DSP based frequency domain approach for non-stationary signals using S-Transform

2011 ◽  
Author(s):  
Sagar Kondaveti ◽  
M. Jaya Bharata Reddy ◽  
D. K. Mohanta
Keyword(s):  
Frequency Domain ◽  
S Transform ◽  
Stationary Signals ◽  
Frequency Domain Approach

scholarly journals Blind separation of complex-valued satellite-AIS data for marine surveillance: a spatial quadratic time-frequency domain approach

2019 ◽  
Vol 9 (3) ◽  
pp. 1732
Author(s):  
Omar Cherrak ◽  
Hicham Ghennioui ◽  
Nadege Thirion Moreau ◽  
El Hossein Abarkan
Keyword(s):  
Frequency Domain ◽  
Block Diagonalization ◽  
Blind Separation ◽  
Time Frequency ◽  
High Magnitude ◽  
Frequency Domain Methods ◽  
Stationary Signals ◽  
Mixing Matrix ◽  
Frequency Domain Approach ◽  
Complex Valued

<p>In this paper, the problem of the blind separation of complex-valued Satellite-AIS data for marine surveillance is addressed. Due to the specific properties of the sources under consideration: they are cyclo-stationary signals with two close cyclic frequencies, we opt for spatial quadratic time-frequency domain methods. The use of an additional diversity, the time delay, is aimed at making it possible to undo the mixing of signals at the multi-sensor receiver. The suggested method involves three main stages. First, the spatial generalized mean Ambiguity function of the observations across the array is constructed. Second, in the Ambiguity plane, Delay-Doppler regions of high magnitude are determined and Delay-Doppler points of peaky values are selected. Third, the mixing matrix is estimated from these Delay-Doppler regions using our proposed non-unitary joint zero-(block) diagonalization algorithms as to perform separation.</p>

scholarly journals A frequency‐domain approach for damage detection in welded structures

2021 ◽  
Author(s):  
Camilla Ronchei ◽  
Sabrina Vantadori ◽  
Andrea Carpinteri ◽  
Ignacio Iturrioz ◽  
Roberto Issopo Rodrigues ◽  
...  
Keyword(s):  
Damage Detection ◽  
Frequency Domain ◽  
Welded Structures ◽  
Frequency Domain Approach

A frequency domain approach to residual generation for the industrial actuator benchmark

1995 ◽  
Vol 3 (12) ◽  
pp. 1747-1750 ◽  
Author(s):  
E. Alcorta García ◽  
B. Köppen-Seliger ◽  
P.M. Frank
Keyword(s):  
Frequency Domain ◽  
Frequency Domain Approach ◽  
Residual Generation
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