Um estudo comparativo entre BPSK e QAM, utilizando OFDM, com aplicação aos sistemas móveis de quarta geração

Detalhes bibliográficos
Ano de defesa: 2010
Autor(a) principal: Cavalcante, Tiago Francisco Barros
Orientador(a): Não Informado pela instituição
Banca de defesa: Não Informado pela instituição
Tipo de documento: Dissertação
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Programa de Pós-graduação em Engenharia de Telecomunicações
Engenharia de Telecomunicações
Programa de Pós-Graduação: Não Informado pela instituição
Departamento: Não Informado pela instituição
País: Não Informado pela instituição
Palavras-chave em Português:
Link de acesso: https://app.uff.br/riuff/handle/1/18968
Resumo: Mobile networks have picked a better combination of quality and operational services to their users. In recent years it has seen a major breakthrough for the new possibilities for users and also the interest in obtaining these new applications on their devices. This corroborates with the studies done to advance the techniques of signal compression, coding, channel measurements of parameters such as coherence bandwidth and delay spread. Another important study is associated with modulations of a transmission system. To this end, there are some parameters that can be taken to compare one system when using a modulation with the outcome of the same system when using a second modulation. Among the most used are the Bit Error Rate, or BER, the Symbol Error Rate, or SER and the Probability of Error Bits, or BEP. This dissertation takes the output generated from a simulation of a Rayleigh fading channel that transmits through a system of multicarrier (OFDM). What is sought then is to compare the results of this system when using a BPSK modulation with its result when using an M-QAM system, using as parameter the BER of the channel. This research seeks to inspire future studies and dissertations when taking a field measurement of a radio propagation link. That compared with the values presented with the simulation analysis, can generate a good result for the industrial environment in the future we are headed: WIMAX, LTE and the Fourth Generation telephony.