Searched for: department%3A%22IRCTR%22
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Lian, X. (author), Nikookar, H. (author), Ligthart, L.P. (author)
In this paper, we introduce Adaptive Beamforming (AB) and Distributed Beamforming (DB) as two efficient techniques for IntelligentWiMAX (I-WiMAX). I-WiMAX is a new maritime communication system, consisting of Smart Radio (SR) principles and mobile WiMAX based on the IEEE 802.16e standard. Adopting AB, the same spectrum can accommodate more users...
journal article 2011
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Fasoula, A. (author)
In this thesis, the modeling of extended objects with low-dimensional representations of their 2D geometry is addressed. The ultimate objective is the classification of the objects using libraries of such compact 2D object models that are much smaller than in the state-of-the-art classification schemes based on (High Range Resolution) HRR data....
doctoral thesis 2011
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Wang, Z. (author), Krasnov, O.A. (author), Babur, G.P. (author), Ligthart, L.P. (author), Van der Zwan, F. (author)
This paper presents the development of a reconfigurable receiver to undertake challenging signal processing tasks for a novel polarimetric radar system. The field-programmable gate arrays (FPGAs)-based digital receiver samples incoming signals at intermediate frequency (IF) and processes signals digitally instead of using conventional analog...
journal article 2011
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Ruggiano, M. (author)
This thesis addresses the development of a robust processing technique aimed at resolving and unmasking targets, in range and azimuth, embedded in the received signal of a single and monostatic rotating surveillance radar. The reason for the need of such technique is twofold. Firstly, there are several relevant applications, from collision...
doctoral thesis 2011
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Apeldoorn, M.A. (author)
Radio telescopes are quite often used for astronomy. Since these telescopes are wideband systems, they encounter standing waves between the reflector and the feed. This interaction has been studied by investigation the radar cross section (RCS) of the feed and the effect the standing waves have on the antenna performance (gain and beamwidth).
master thesis 2011
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Krasnov, O.A. (author), Babur, G.P. (author), Wang, Z. (author), Ligthart, L.P. (author), Van der Zwan, F. (author)
The article describes the IRCTR PARSAX radar system, the S-band high-resolution Doppler polarimetric frequency modulated continuous wave (FM-CW) radar with dual-orthogonal sounding signals, which has the possibility to measure all elements of the radar target polarization scattering matrix simultaneously, in one sweep. The performance of such...
journal article 2010
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Tanyer-Ti?rek, F.M. (author)
Ultra-wideband (UWB) is a radio technology that can be used at very low energy levels, for short-range high-bandwidth communications, by using a large radio spectrum. Due to its high speed rate, this technology is nowadays one of the most promising solutions for communications. Maximum data that can be transmitted per second over a communication...
doctoral thesis 2010
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Ghaseminezhad Marandi, I. (author)
The IEEE 802.11n standard is a promising technology for near future Wireless LAN's. By utilizing enhanced techniques like MIMO communication and OFDM digital modulation extremely high data rates over large distances are possible for wireless communications. Predecessors like 802.11b/g standards are succesfully outnumbered and a strong competitor...
master thesis 2009
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Van Genderen, P. (author), Kovalenko, V. (author)
Detection in most surveillance radars is based on the condition of point targets against a more or less homogeneous background. Currently, the resolution of many new types of radar is increasing, at least in the range dimension. Therefore many objects can no longer be considered as points. Also as a consequence, the background is becoming more...
journal article 2009
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Abdulrahman, H. (author)
The demand for high data rates in wireless communication systems is increasing as well the demand for new (communication) services. Expanding of existing services or introducing new services needs a portion in the radio spectrum. Mean while the radio spectrum is a scarce resource and is regulated by governmental regulations and policies....
master thesis 2009
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Lakshmanan, M.K. (author), Nikookar, H. (author)
Ultra wideband (UWB) wireless systems are highly susceptible to interference from other services. To reduce the effect of interference from co-existing sources such as the WLAN standard IEEE 802.11a on UWB Communication, the construction of a modified template waveform using multi-carrier sinusoids is proposed in Ohno and Ikegami (2003), Ohno et...
journal article 2009
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De Wit, J.J.M. (author)
In the field of airborne earth observation there is a special interest in lightweight, low cost imaging radars of high resolution. Such radar systems could play an essential role in small-scale earth observation applications such as the monitoring of dikes, watercourses or areas in which gas pipes or electrical power lines are buried. In order...
doctoral thesis 2005
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De Wit, J.J.M. (author)
In order to obtain the cloud liquid water content from radar observations, a relationship between the radar reflectivity (Z) and the cloud liquid water content (LWC) must be found. In literature, empirical Z-LWC have been proposed. However these relationships ignore drizzle-sized droplets. Since the clouds were drizzling during Clare these...
master thesis 2000
Searched for: department%3A%22IRCTR%22
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