The purpose may be to accurately detect a distress signal from a search and rescue transponder and reduce a calculation load for the detection. A signal processing device for detecting a distress signal from a search and rescue transponder may be provided. The device may include an instantaneous frequency change rate calculating module 21 configured to calculate a change rate of an instantaneous frequency of a complex reception signal generated from a reception wave received by a wave receiver, a memory 22 configured to store a value obtained based on a reference frequency sweeping speed that is a frequency sweeping speed of the distress signal, and a distress signal determining module 28 configured to determine whether the distress signal is issued from the search and rescue transponder, based on a comparison result between the instantaneous frequency change rate calculated by the instantaneous frequency change rate calculating module 21 and the value obtained based on the reference frequency sweeping speed stored in the memory 22.
SIGNAL-PROCESSING DEVICE, RADAR DEVICE, AND SIGNAL-PROCESSING METHOD
SIGNALVERARBEITUNGSVORRICHTUNG, RADARVORRICHTUNG UND SIGNALVERARBEITUNGSVERFAHREN
DISPOSITIF DE TRAITEMENT DE SIGNAL, DISPOSITIF RADAR ET PROCÉDÉ DE TRAITEMENT DE SIGNAL
2020-02-05
Patent
Electronic Resource
English
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