Temat: non-ideal - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Extended Definitions of Spectrum of a Sampled Signal
Autorzy:: Borys, Andrzej
Powiązania:: https://bibliotekanauki.pl/articles/1844508.pdf
Data publikacji:: 2021
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: spectrum of sample signal
ideal versus non-ideal sampling
modelling of signal sampling process
Opis:: It is shown that a number of equivalent choices for the calculation of the spectrum of a sampled signal are possible. Two such choices are presented in this paper. It is illustrated that the proposed calculations are more physically relevant than the definition currently in use.
Źródło:: International Journal of Electronics and Telecommunications; 2021, 67, 3; 395-401
2300-1933
Pojawia się w:: International Journal of Electronics and Telecommunications
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: On modelling and description of the output signal of a sampling device
Autorzy:: Borys, Andrzej
Powiązania:: https://bibliotekanauki.pl/articles/2202544.pdf
Data publikacji:: 2023
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: signal sampling
modelling
ideal or non-ideal sampling
averaging operator
Dirac and Kronecker deltas
Opis:: The problem of an inconsistent description of an “interface” between the A/D converter and the digital signal processor that implements, for example, a digital filtering (described by a difference equation) – when a sequence of some hypothetical weighted Dirac deltas occurs at its input, instead of a sequence of numbers – is addressed in this paper. Digital signal processors work on numbers, and there is no “interface” element that converts Dirac deltas into numbers. The output of the A/D converter is directly connected to the input of the signal processor. Hence, a clear conclusion must follow that sampling devices do not generate Dirac deltas. Not the other way around. Furthermore, this fact has far-reaching implications in the spectral analysis of discrete signals, as discussed in other works referred to in this paper.
Źródło:: Archives of Electrical Engineering; 2023, 72, 1; 147--155
1427-4221
2300-2506
Pojawia się w:: Archives of Electrical Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Spectrum Aliasing Does Occur Only in Case of Non-ideal Signal Sampling
Autorzy:: Borys, Andrzej Marek
Powiązania:: https://bibliotekanauki.pl/articles/1844609.pdf
Data publikacji:: 2021
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: signal sampling
occurrence of spectrum aliasing and folding
signal modelling
non ideal signal sampling operation
Opis:: In this paper, it has been shown that the spectrum aliasing and folding effects occur only in the case of non-ideal signal sampling. When the duration of the signal sampling is equal to zero, these effects do not occur at all. In other words, the absolutely necessary condition for their occurrence is just a nonzero value of this time. Periodicity of the sampling process plays a secondary role.
Źródło:: International Journal of Electronics and Telecommunications; 2021, 67, 1; 79-85
2300-1933
Pojawia się w:: International Journal of Electronics and Telecommunications
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Another Proof of Ambiguity of the Formula Describing Aliasing and Folding Effects in Spectrum of Sampled Signal
Autorzy:: Borys, Andrzej
Powiązania:: https://bibliotekanauki.pl/articles/2055252.pdf
Data publikacji:: 2022
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: signal sampling
occurrence of spectrum aliasing and folding
modelling of non-ideal signal sampling operation
Vetterli's model
Opis:: In this paper, a new proof of ambiguity of the formula describing the aliasing and folding effects in spectra of sampled signals is presented. It uses the model of non-ideal sampling operation published by Vetterli et al. Here, their model is modified and its black-box equivalent form is achieved. It is shown that this modified model delivers the same output sequences but of different spectral properties. Finally, a remark on two possible understandings of the operation of non-ideal sampling is enclosed as well as fundamental errors that are made in perception and description of sampled signals are considered.
Źródło:: International Journal of Electronics and Telecommunications; 2022, 68, 1; 115--122
2300-1933
Pojawia się w:: International Journal of Electronics and Telecommunications
Dostawca treści:: Biblioteka Nauki

Artykuł

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