Temat: noise SAR - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Pseudo-Noise Waveform Design Minimizing Range and Doppler Masking Effect
Autorzy:: Kulpa, J. S.
Misiurewicz, J.
Powiązania:: https://bibliotekanauki.pl/articles/226260.pdf
Data publikacji:: 2011
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: noise radar
noise SAR
waveform design
Opis:: Noise radar is a very promising technology offering advantages which cannot be achieved in classical radar systems. Unfortunately, it has also several disadvantages. One of the most significant is the masking effect, where strong objects raise the noise floor preventing detection of weak ones and significantly affecting dynamic range. In this article method of designing waveform with reduced noise floor is presented.
Źródło:: International Journal of Electronics and Telecommunications; 2011, 57, 3; 359-362
2300-1933
Pojawia się w:: International Journal of Electronics and Telecommunications
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Experimental Investigation of Factors Affecting Stability of Interferometric Measurements with Ground Based Noise Waveform SAR
Autorzy:: Lukin, K. A.
Palamarchuk, V. P.
Vyplavin, P. L.
Kudriashov, V. V.
Powiązania:: https://bibliotekanauki.pl/articles/226322.pdf
Data publikacji:: 2011
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: noise waveform
noise radar
SAR imaging
differential interferometry
Opis:: Application of ground-based SAR and differential interferometry technique is often used for monitoring manmade objects aiming detection of their structural changes. Recently Ka-band Ground Based Noise Waveform SAR has been developed [1] which may be applied for the above monitoring. The paper is devoted to investigation of stability of Noise Waveform SAR. Monitoring of a simple construction has been carried out. The related measurements enabled estimating the accuracy of differential phase measurements using the above Ka-band Noise Waveform SAR. In the paper we present some results of the experiments and their explanations.
Źródło:: International Journal of Electronics and Telecommunications; 2011, 57, 3; 389-393
2300-1933
Pojawia się w:: International Journal of Electronics and Telecommunications
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Bistatic Noise SAR Experiment with a Non-Cooperative Illuminator
Autorzy:: Maślikowski, Ł.
Kulpa, K.
Powiązania:: https://bibliotekanauki.pl/articles/226516.pdf
Data publikacji:: 2011
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: SAR
noise radar
passive radar
COTS
Opis:: The paper describes the results of a conception-stage experiment with a ground-based bistatic noise SAR (Synthetic Aperture Radar) demonstrator. Its aim was to research the ability of a simple Commercial-Off-The-Shelf (COTS) build system to provide a bistatic SAR image using non-cooperative illuminator. The noise signal used in the experiment is similar to a signal used in many transmission systems such as DVB-T that can be employed in passive bistatic radars. The paper presents the system setup, details of the measurement campaign, signal processing and the results of SAR imaging.
Źródło:: International Journal of Electronics and Telecommunications; 2011, 57, 1; 85-89
2300-1933
Pojawia się w:: International Journal of Electronics and Telecommunications
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Nonuniform Spatial Sampling in a Ground-Based Noise SAR
Autorzy:: Maślikowski, Ł.
Misiurewicz, J.
Powiązania:: https://bibliotekanauki.pl/articles/226510.pdf
Data publikacji:: 2011
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: nonuniform sampling
noise radar
synthetic aperture
radar (SAR)
compressive sampling
Opis:: The paper presents an idea of nonuniform spatial sampling applied to a noise synthetic aperture radar. In certain cases it is desirable to limit the number of spatial (alongtrack) domain samples acquired in a SAR radar because of external constraints on sampling frequency or on the overall number of samples – e.g. in order to economy on time or power consumed. Lowering number of samples taken may, however, lead to spatial aliasing and incorrect reconstruction of the image. Nonuniform sampling allows to reduce the aliasing effect and reconstruct the image better. This technique can be applied with standard reconstruction methods, but it works best together with Compressive Sensing reconstruction algorithms. The idea will be verified with an experimental noise SAR built at ISE PW.
Źródło:: International Journal of Electronics and Telecommunications; 2011, 57, 1; 71-75
2300-1933
Pojawia się w:: International Journal of Electronics and Telecommunications
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 5.

Tytuł:: Sampling Jitter in Audio A/D Converters
Autorzy:: Kulka, Z.
Powiązania:: https://bibliotekanauki.pl/articles/177046.pdf
Data publikacji:: 2011
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: analog-to-digital converter
ADC
successive approximation register (SAR)
sigma-delta ADC
sample-and-hold circuit
DT sigma delta modulator
CT sigma delta modulator
time jitter
aperture jitter
clock jitter
periodic clock jitter
signal-to-noise ratio (SNR)
Opis:: This paper provides an overview of the effects of timing jitter in audio sampling analog-to-digital converters (ADCs), i.e. PCM (conventional or Nyquist sampling) ADCs and sigma-delta (ΣΔ) ADCs. Jitter in a digital audio is often defined as short- term fluctuations of the sampling instants of a digital signal from their ideal positions in time. The influence of the jitter increases particularly with the improvements in both resolution and sampling rate of today’s audio ADCs. At higher frequencies of the input signals the sampling jitter becomes a dominant factor in limiting the ADCs performance in terms of signal-to-noise ratio (SNR) and dynamic range (DR).
Źródło:: Archives of Acoustics; 2011, 36, 4; 831-849
0137-5075
Pojawia się w:: Archives of Acoustics
Dostawca treści:: Biblioteka Nauki

Artykuł

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