Publicação
Multi-tone linearity characterization techniques and metrics for nonlinear dynamic RF systems
| Resumo: | Linearity quantifies how much a system drifts from the ideal linear operation. Unfortunatelly, the technical ability to characterize linearity is incomplete. Measuring nonlinear dynamics, and relating linearity metrics measured with different test signals has always been a problem. As telecommunication technologies transcend the limits of radio frequency hardware by occupying broader bandwidths, moving to higher carrier frequencies, and using a more deversified set of modulated signals, the time to overcome these linearity characterization limitations runs short. This work addresses both problems. It explains how nonlinear dynamic effects manifest under broadband excitation, presenting a technique to measure them: swept noise power ratio. And defines a framework to compare linearity when using different signals. This framework consists of a clear understanding of how the system under test and the test signal influence linearity metrics, and of the expected linearity metric, a linearity metric definition that, regardless of the system and signal, enables a seamless linearity evaluation. |
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| Autores principais: | Figueiredo, Ricardo José Coelho de |
| Assunto: | Linearity characterization Multi-tone Nonlinear dynamics Swept noise power ratio Expected linearity metric |
| Ano: | 2023 |
| País: | Portugal |
| Tipo de documento: | tese de doutoramento |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade de Aveiro |
| Idioma: | inglês |
| Origem: | RIA - Repositório Institucional da Universidade de Aveiro |
| Resumo: | Linearity quantifies how much a system drifts from the ideal linear operation. Unfortunatelly, the technical ability to characterize linearity is incomplete. Measuring nonlinear dynamics, and relating linearity metrics measured with different test signals has always been a problem. As telecommunication technologies transcend the limits of radio frequency hardware by occupying broader bandwidths, moving to higher carrier frequencies, and using a more deversified set of modulated signals, the time to overcome these linearity characterization limitations runs short. This work addresses both problems. It explains how nonlinear dynamic effects manifest under broadband excitation, presenting a technique to measure them: swept noise power ratio. And defines a framework to compare linearity when using different signals. This framework consists of a clear understanding of how the system under test and the test signal influence linearity metrics, and of the expected linearity metric, a linearity metric definition that, regardless of the system and signal, enables a seamless linearity evaluation. |
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