
handle: 10773/30779
In this work is studied the direct interference between FMCW radars using the algebraic expressions that outputs the expected chirp interference rate. In hope that by understanding the effect of each radar parameters on the radar system, it is possible to reduce or eliminate the chirp interference rate within the radar system. The expressions are inspired by set theory in order to better gather the numerous conditions that limit the interference rate, such as the frequency window and the chirps duration, to reduce the complexity of the FMCW radar signal, and last, to translate to a more efficient use of the simulation computations in regard to time and memory used. The simulators created serves two purposes: first to allow to simulate interference between two radars with different configurations. Supporting the expressions interference rate output. Second it gives an intuitive way to visualize and understand the interference behavior. Lastly, was experimented with success using radar development kits to confirm the theorical and simulated results.
Neste trabalho estuda-se a interferência directa entre radares FMCW. Este estudo poderá ser usado para entender o efeito dos parâmetros dos sinais radar com o uso de expressões algébricas que estimam o número de ocorrências de interferência. As expressões têm como base a teoria de conjuntos para exprimir o sinal de um radar FMCW, que permite uma escrita simples das condições de interferência no domínio da frequência. Para além disto, permite uma adaptação para uma simulação computacional mais eficiente em termos de tempo e memória usada. Os simuladores criados servem dois propósitos: primeiro para permitir uma simulação rápida e parametrizável um cenário com dois radares, apoiando assim as introduzidas expressões algébricas. Segundo, permitem uma forma intuitiva de visualizar o comportamento de interferência entre radares. Por fim, foram feitas experiências em laboratório para confirmar, não só, as expressões algébricas, assim como, os simuladores desenvolvidos.
Mestrado em Engenharia Eletrónica e Telecomunicações
Simulations, FMCW radars, Set theory, Direct interference, Algebraic expressions
Simulations, FMCW radars, Set theory, Direct interference, Algebraic expressions
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