Chandra, Madhukar and Danklmayer, Andreas (2011) Tropospheric-Propagation induced Distortion of Wideband Signals. In: Proceedings of the International Conference on Electromagnetics and Advanced Applications (ICEAA). International Conference on Electromagnetics and Advanced Applications (ICEAA), 2011-09-12 - 2011-09-17, Torino, Italy.
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Wideband signals are already playing an important role in telecommunications and radar remote sensing. In telecommunication applications, large-bandwidth signals are required for generating high channel capacity and data-transfer rates. In radar-imaging applications, large bandwidths are required for obtaining higher spatial resolution, for instance. The well known benefits of wideband signals, however, are available only under the premise that the free-space propagation effects do not distort or impair the amplitude and phase composition of the different frequency components contained in such signals. Indeed, the so-called free-space is, however, often filled with precipitation media, such as rain. Contrary to popular belief, such media are entirely capable of generating dispersion by causing unequal attenuation and phase-shift of the different frequency components present in the wideband signal. In this contribution, we shall report investigations in this regard. More precisely, using an appropriate scattering model of rain media, we shall, in the first step, quantify the frequency dependent amplitude extinction and phase-shift in rain media for different frequencies in the range of 1-60 GHz. In the second step, we shall use this information to quantify the distortion of wideband signals with different centre carrier frequencies and different modulation depths. Also, the results will be used to construct the ‘channel impulse response’ appropriate for different rain media that are likely to occur in reality. In this contribution, for brevity and accuracy of scattering calculations, the polarization dependence of rain media will not be considered. The results should enable the radar engineer and the telecommunication engineer to estimate the degree of tropospheric-propagation induced distortion of wideband signals both in the frequency domain and the time domain.
|Document Type:||Conference or Workshop Item (Speech, Paper)|
|Title:||Tropospheric-Propagation induced Distortion of Wideband Signals|
|Journal or Publication Title:||Proceedings of the International Conference on Electromagnetics and Advanced Applications (ICEAA)|
|In ISI Web of Science:||No|
|Keywords:||Wideband Signals, Propagation distortions, radar remote sensing|
|Event Title:||International Conference on Electromagnetics and Advanced Applications (ICEAA)|
|Event Location:||Torino, Italy|
|Event Type:||international Conference|
|Event Dates:||2011-09-12 - 2011-09-17|
|Organizer:||Politecnico di Torino, Istituto Superiore Mario Boella, Torino Wireless Foundation with Sponsorship of IEEE|
|HGF - Research field:||Aeronautics, Space and Transport (old)|
|HGF - Program:||Space (old)|
|HGF - Program Themes:||W EO - Erdbeobachtung|
|DLR - Research area:||Space|
|DLR - Program:||W EO - Erdbeobachtung|
|DLR - Research theme (Project):||W - Vorhaben SAR-Expert-Support-Lab (old)|
|Institutes and Institutions:||Microwaves and Radar Institute > Radar Concepts|
|Deposited By:||Dr.-Ing. Andreas Danklmayer|
|Deposited On:||21 Apr 2011 09:27|
|Last Modified:||22 Dec 2011 23:45|
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