Modelado y Mitigación de Fenómenos de Multitrayecto en Imágenes Radar mediante Técnicas basadas en Inversión Temporal

Abstract

SAR (Synthetic Aperture Radar) and ISAR (Inverse SAR) techniques are coherent high-resolution radar systems, capable of providing a map of target radar cross section in the spatial domain of range and azimuth. The aim of both techniques consists in achieving a finer azimuth resolution by generating a synthetic aperture from the relative motion between radar and target. Radar imaging complements the task of conventional optical and infrared systems, especially in adverse weather conditions.Conventional SAR and ISAR systems are designed for imaging targets with a direct line of sight of sensors. For this reason, they have a reduced performance in complex scenarios, such as in forests or urban environments, where multiplebounce returns are superposed to direct-scatter echoes coming from targets. They are known as ghost artifacts, since they obscure true targets and lead to poor visual quality, making target detection particularly difficult. Lista de acrónimosADC Analog-to-Digital Converter. Conversor analógico-digital. AIC Akaike Information Criterion. Criterio extendido de Akaike. AM Amplitude Modulation. Modulación de amplitud. ATR Automatic Target Recognition. Reconocimiento automático de blancos. CPI Coherent Processing Interval. Intervalo de procesado coherente.