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 12 of 12 for “"Macrocells"”.
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Resource Allocation in Cellular Networks with Coexisting Femtocells and Macrocells
… cellular networks with coexisting femtocells and macrocells on the downlink side, addressing questions such as: How many additional resource blocks are required to add femtocells into the current cellular system? What is the best way to reuse resources between femtocells and macrocells? How can we …
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BiCMOS technology and some applications in high performance arithmetic structures.
… architectures were implemented in the form of macrocells, and their design is discussed. Toward that end, a survey of hardware multipliers is given, concentrating on the parallel types, and two new recently proposed architectures are described which form the basis for five of the six …
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Optimising energy efficiency and spectral efficiency in multi-tier heterogeneous networks : performance and tradeoffs
… BSs overlaid within the coverage area of the macrocells. The HetNets can provide better coverage and data rate to the cell edge users in comparison to the macrocells only deployment. One of the key requirements for the next generation networks is to maintain acceptable levels of both EE and …
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Advanced handover procedure for cellular communication systems
… architecture in which picocells, microcells and macrocells are used to achieve full coverage and increase the spectral capacity. Supporting higher numbers of mobile terminals and the use of smaller cells will result in an increase in the number of handovers, and consequently an increase in the …
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Coverage Analysis and Resource Allocation in Heterogeneous Networks
… associate high speed users to upper tiers (e.g., macrocells) with a lower AP density. For stationary users, we first derive the statistical distribution of the load, and the minimum bandwidth required to meet an outage constraint in a multi-tier HetNet. This result is most useful for system design …
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Distributed spectrum leasing via cooperation
… wireless networks such as femtocells overlaid by macrocells whereby the femtocell base station acts as a relay for the macrocell users is presented. The performance advantages of the proposed application are evaluated by studying the transmission reliability of macro and femto users for a …
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Modelling and Analysis of Resource Management Schemes in Wireless Networks. Analytical Models and Performance Evaluation of Handoff Schemes and Resource Re-Allocation in Homogeneous and Heterogeneous Wireless Cellular Networks.
… Thirdly, performance models for microcells and macrocells in hierarchical cellular networks have been developed by using a combination of different handoff schemes. Finally, the microcell in HCN is replaced by WLANs and a prioritised vertical handoff scheme in an integrated UMTS/WLAN network has …
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Efficient radio resource management for future generation heterogeneous wireless networks
… in the coverage area of the traditional macrocells is a cost-efficient solution to provide network capacity, indoor coverage and green communications towards sustainable environments in the future fifth generation (5G) wireless networks. However, the unplanned and ultra-dense deployment …
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Distributed Multiple Access for OFDMA Femtocells
… heterogeneous network architecture consisting of macrocells for wide-area coverage and smaller cells such as femtocells for capacity boost in local hotspots. The primary problem in such heterogeneous networks is mitigating inter-cell interference especially in dense deployments of residential …
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Integration of a genetic optimisation algorithm in a simulation framework for optimising femtocell networks.
… demands for heterogeneous networks in which macrocells work in combination with femtocells to provide coverage to offices, homes and enterprise. A survey of the literature is conducted to examine the mechanisms and approaches different authors have used to optimise the network. One of the …
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Doppler spread estimation in mobile fading channels
… speed estimation at the base station in macrocells is also provided. In comparison with the existing methods, the new estimators can be used without any need for pilot tones and are robust to additive stationary noise or interference of any color or distribution. Unlike the conventional …
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Generic Adaptive Handoff Algorithms Using Fuzzy Logic and Neural Networks
Efficient handoff algorithms cost-effectively enhance the capacity and Quality of Service (QoS) of cellular systems. This research presents novel approaches for the design of high performance handoff algorithms that exploit attractive features of several existing algorithms, provide adaptation to …