[pt] Este trabalho apresenta um estudo detalhado de técnicas de planejamento de sistemas celulares de terceira geração WCDMA. Primeiramente é realizado um estudo teórico do sistema WCDMA, da estrutura da interface aérea, dos diversos tipos de canais presentes no downlink e no uplink. A seguir são aprentadas técnicas de planejamento de rede, com uma análise detalhada do cálculo de enlace e do planejamento de cobertura do sistema celular. Com base neste estudo foram realizadas diversas simulações com o software aberto NPSW para diferentes situações em relação a tipos de serviço, condições de uso e carga no sistema. Estas simulações permitiram caracterizar os efeitos dos diversos parâmetros de entrada no desempenho do sistema. Finalmente, é apresentado um estudo de caso de planejamento para a região do centro do Rio de Janeiro. / [en] This work presents a detailed study of planning tecniques for third generation WCDMA cellular systems. At first a theoretical study of the WCDMA system is presented, including the structure of the air interface and the various channel types in the downlink and uplink. Following, network planning techniques are presented, with a detailed analysis of the link budget calculations and the system coverage planning issues. Based on this study, the system behaviour was simulated using the open software NPSW for different configurations of service, operation condition and system load. The simulations allowed the characterization of the effect of several parameters on the system performance. Finally, a case study of coverage planning for downtown Rio de Janeiro is presented.

Software radios have evolved as multimode, programmable digital radios that perform radio functions using digital signal processing algorithms. They have been designed as software programmable radios using a combination of various hardware elements and structures. In this dissertation a {em{soft radio}} refers to a completely configurable radio that can be programmed through software, to change the radio behavior including the hardware functionality. Conventional software radios achieve flexibility through software with the use of static hardware. While these radios have the flexibility to operate in multiple modes, the hardware is not used efficiently. This inefficient utilization of hardware frequently limits the flexibility of software radios and the number of modes the radio can support. Soft radios however, attempt to gain flexibility through the use of reconfigurable hardware. The same piece of hardware can be configured to perform different functions based on the mode the radio is operating in. While many soft/software radio architectures have been suggested and implemented, there remains a lack of a formal design methodology that can be used to design and implement reconfigurable soft radios. Most designs are based on ad hoc approaches which are appropriate only for the problem at hand. After examining the design issues of a soft radio an architecture, called the {em{Layered Radio Architecture}}, is developed with the use of stream based processing and run-time reconfigurable hardware. These choices aid in maximizing performance with minimum hardware while keeping the architecture robust, simple, and scalable. The reconfigurable platform enables {em hardware paging} through reusability hardware. The stream-based approach gives a uniform modular structure to the processing modules and defines the protocol for interaction between various modules. The architecture describes a formal yet open design methodology and makes it possible to incorporate all of the features of a software radio while minimizing complexity issues. The layered architecture also defines the methodology for incorporating changes and updates into the system. The layered radio architecture assumes run-time reconfigurability of the hardware. This feature is not supported by existing commercial reconfigurable hardware, like FPGAs. An Custom Computing Machine (CCM), called Stallion that supports fast run time reconfiguration, has been developed at Virginia Tech. This dissertation describes the deficiencies of existing commercial reconfigurable hardware and shows how the Stallion is capable of supporting the layered radio architecture. The dissertation presents algorithms and procedures that can be used to implement the layered radio architecture using existing hardware. The architecture is validated with the implementation of two receivers: A single user CDMA receiver based on complex adaptive filtering and a W-CDMA downlink rake receiver with channel estimation. Performance analysis of these receivers show that it is important to keep the paging ratio high while maximizing utilization of the processing elements. The layered radio architecture with the use of Stallion can support existing high data rate systems. / Ph. D.

[pt] Impulsionadas pelo crescimento do mercado corporativo e pela prestação de serviços para grandes clientes, as operadoras de serviços de telecomunicação estão buscando processos automatizados e redução de custo no desenvolvimento de novos projetos de redes de telecomunicações. Nesse cenário, dois modelos de Programação Inteira são apresentados buscando uma minimização de custos. O primeiro para o problema de planejamento de novas redes. E segundo para o problema de configuração de trails nas redes SDH. Uma introdução sobre meios de transmissão, redes de telecomunicações, topologias mais utilizadas e sistemas de proteção são apresentados. Por fim, em ambos problemas, são apresentados estudos comparativos com situações reais, com o intuito de validar os modelos. / [en] Stimulated by the growth of the corporate market and by the services dedicated to big customers, providers are searching for, even more nowadays, automated process and cost reduction on the development of new telecommunications networks projects. In that setting, two models of Integer Programming will be presented, seeking a minimization of costs. At first, for the problem of planning of new networks, and second for the problem of configuration of trails in the SDH networks. Beyond that, an introduction about transmission lines, networks of communication, topology more utilized and systems of protection will be presented. In both problems, comparing real situations, with the purpose of validate the models.