Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 38 for “"frequency reuse"”.
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A study of parasitic cellular frequency reuse
… is to provide an analysis to determine the frequency reuse possible between in-building and outside cellular systems. The amount of frequency reuse currently available for an urban office building is presented based on field strength measurements made inside the building. In addition, this …
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Frequency reuse through RF power management in ship-to-ship data networks
… available in the UHF band, it is desired to reuse a frequency channel at the shortest possible range. By limiting the radiated power to the minimum required to establish a desired quality of service, the channel can be reused at considerably shorter ranges than when the transmitter output …
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Improving fractional frequency reuse (FFR) for interference mitigation in Multi-tier 4G wireless networks
… their Ad-hoc mode of deployment. The Fractional Frequency Reuse (FFR) is an interference mitigation scheme, due to its effectiveness and low complexity; it has been proposed to be an efficient technique of solving the problem of interference in the cross-boundary region. In this study, a critical …
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An Analytical Tool for Calculating Co-Channel Interference in Satellite Links That Utilize Frequency Reuse
… mobile communications system, due to the reuse of frequencies in spot beams or coverage cells. The analysis and computer code can be applied to any type of satellite or platform elevated at any height above earth. The cells or beams are defined in the angular domain, as measured from the …
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Co-channel interference cancellation in mobile cellular communication systems
… limited by co-channel interference caused by frequency reuse. The acceptable co-channel interference at the receiver determines the minimum allowable distance between adjacent co-channel users and hence the system capacity. One approach to increase the capacity is to employ co-channel …
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Spread spectrum satellite multiple access and overlay service
… on existing satellite traffic as a form of frequency reuse.
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Exploiting the ability of Self Organizing Networks for inter-cell interference coordination for emergency communications in cellular networks
… channel, such as limited spectrum, leads to frequency reuse but also irrevocable interference. This thesis gives a holistic conspectus of interference coordination in LTE cellular systems utilizing the ability of Self Organizing Networks (SON). LTE uses a universal frequency reuse concept and …
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Interference Management in Heterogeneous Cellular Networks
… performance with system parameters such as frequency reuse factor, transmission probability, and the signal-to-interference ratio (SIR) gap from Shannon capacity. Specifically, the interference and performance impact of Rician fading and lognormal shadowing are analytically investigated, …
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System requirements for a dual polarized space to earth communications link
… communications links in the 20/30 GHz bands and frequency reuse through orthogonal polarizations. This thesis examines the system level constraints imposed by medium effects at these high frequencies of which the most serious is rain induced attenuation and depolarization. The effect of crosstalk …
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Rain depolarization scatter prediction
… diversity design; multiple hop systems requiring frequency reuse and systems constrained to operate under fixed polarizations.
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Personal communications services: improving theater deployable communications for the 21st century
… systems. Cellular design principles such as frequency reuse, cell splitting, channel access methods, and propagation factors are also addressed. Finally, a framework for comparison of the candidate MSS systems is proposed as a baseline for further studies into the most beneficial …
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Parameterized analysis of optical inter-satellite links for high resolution satellite communication
… for reducing interference and enabling frequency reuse. Antenna arrays have been deployed in single satellite applications but arrays have not been exploited in multi-satellite constellations where increased array size enables high spatial selectivity between ground transmitters. One …
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Mobility management in 5G heterogeneous networks
… a key innovation in 5G, which enables frequent frequency reuse and higher data rates. Small cells, however, present a major challenge for nodes moving at vehicular speeds. This is because the smaller coverage areas of small cells result in frequent handover, which leads to lower throughput and …
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General Interference Suppression Technique For Diversity Wireless Rece
… multiple antenna elements are used for increased frequency reuse. The suppression of both image signal and Co-Channel Interference (CCI) are performed in DSP simultaneously. The signal-processing algorithm used is Independent Component Analysis (ICA). Specifically, the fixed-point Fast-ICA is …
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A Model-Based Receiver for CPM Signals in a Cochannel Interference Limited Environment
… systems, identical carrier frequencies are reused in distant cells. The interference rejection capability of the receiver determines this frequency reuse and is therefore critical. In this thesis, we propose an improved demodulation scheme, employing high-resolution frequency estimation …
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Design of broad-band dual-polarized microstrip patch antennas with high port isolation for millimeter-wave 5G applications
… polarized antennas are designed covering the frequency band for the next generation of 5G communications around 28 GHz. Dual polarization antennas are employed to increase the capacity of the allocated spectrum through frequency reuse. Techniques for improving the impedance bandwidth is one of …
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Time dependent adaptive filters for interference cancellation in CDMA systems
… benefits of wideband modulation and universal frequency reuse traditionally associated with CDMA systems. The net result is a tremendous increase in system user capacity and signal reception quality.
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Integrated broadband microphotonic beamformer for adaptive nulling in smart antennas
… bandwidth, signal-to-interference ratio, and frequency reuse. Due to the increasing complexity of the smart antennas system, innovations and improvements in miniaturisation, power consumption, and cost are needed. These breakthroughs could be achieved by combining the microelectronic and …
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Interference Aware Cognitive Femtocell Networks
… model which builds upon an existing fractional frequency reuse technique to ensure minimal impact on the macro-tier resource allocation. A new flexible and adaptive virtual clustering framework is then formulated to alleviate co-tier interference in high FAP densities situations and finally, an …
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High speed 802.11ad wireless video streaming
… (UHD) video shows the feasibility of aggressive frequency reuse in the absence of co-channel interference. Moreover, using heuristic approach, this work compared materials absorption and signal reception at 60 GHz and the results gives better performance in contrast to the theoretical values. …
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