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Signal-to-noise ratio equalization for TOPSAR mode using a nonuniform steering rate
Ruiz Rodon, Josep; Broquetas Ibars, Antoni; González Arbesú, José María; Closa Domínguez, Josep M.; Labriola, M
Universitat Politècnica de Catalunya. Departament de Física Aplicada; Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions; Universitat Politècnica de Catalunya. RSLAB - Grup de Recerca en Teledetecció; Universitat Politècnica de Catalunya. ANTENNALAB - Grup d´Antenes i Sistemes Radio
In this letter, an optimized scanning in terrain observation by progressive scan synthetic aperture radar (TOPSAR) mode is studied. A nonuniform steering rate of the radar array antenna in the along-track direction is proposed in order to obtain constant radiometric sensitivity and signal-to-noise ratio. This is achieved owing to the longer integration time of the echoes received at both ends of the antenna azimuth sweep. By optimizing iteratively the array discrete steering rate law, the radiometric impact of the array basic element pattern (subarray pattern) can be accurately compensated. First, simulation results are presented to validate the nonuniform steering TOPSAR.
Peer Reviewed
Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Processament del senyal
Signal processing
Tractament del senyal -- Tècniques digitals
info:eu-repo/semantics/publishedVersion
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