Implementation and tuning of optical singlesideband modulation in ring resonator-based optical beam forming systems for phased-array receive antennas

Hong, L. (2009) Implementation and tuning of optical singlesideband modulation in ring resonator-based optical beam forming systems for phased-array receive antennas.

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Abstract:For receiving broadband satellite signal in airplanes, phased array antenna systems can be used instead of conventional satellite dishes, with advantages such as small weight and better aerodynamic performance. The corresponding beam forming and beam steering system can be implemented in the optical domain. The goal of this master assignment is to analyze and verify the functionality of an optical single sideband filter in the DVB-S receiving system. In order to achieve this goal, the following steps have been taken. First, the frequency response of the filter has been investigated through study its transfer function. The result shows that this filter is not linear in phase, which means that it may introduce signal distortion. Second, the impact of the filter on the modulated signal was studied from the signal pulse point of view. Results are presented for a satellite television case study, based on DVB-S standard. Third, the filter response has been optimized and, and finally the sideband filtering on a double sideband signal has been demonstrate. The result of the filter analysis indicates that the pulse broadening is quite small and the optimization shows that the filter can be tuned with a value of 25dB suppression and this response can be shifted freely within one free spectra range, without any distortion of the filter response. With this filter response, an optical single sideband suppressed carrier modulation is implemented. The obtained results show that this optical single sideband filter has a good performance with DVB-S standard signal
Item Type:Essay (Master)
Faculty:EEMCS: Electrical Engineering, Mathematics and Computer Science
Subject:54 computer science
Programme:Telematics MSc (60032)
Link to this item:http://purl.utwente.nl/essays/59380
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