The study on simulation of raw signal for spaceborne SAR aims at producing raw signal to test and evaluate the system and imaging algorithm. The model used for simulation includes a distributed target model, a platfor...The study on simulation of raw signal for spaceborne SAR aims at producing raw signal to test and evaluate the system and imaging algorithm. The model used for simulation includes a distributed target model, a platform and target geometry model, and a mathematical architecture used for generation of raw echo. Two aspects are stressed, one is the effects of earth ellip soid and attitude errors on radar impulse respense, the other is quick generation of range migration in azimuth frequency domain. Prescribed statistical characteristics of the model account for a realistic speckle of actual image. Finally, examples are given to validate the simulation of raw signal for spaceborne SAR.展开更多
he raw echo simulator, one of the fundamental components of Chinas Cband spaceborne Synthetic Aperture Rador(SAR) ground demonstration system is presented in this paper. The function of the raw echo simulator is to pr...he raw echo simulator, one of the fundamental components of Chinas Cband spaceborne Synthetic Aperture Rador(SAR) ground demonstration system is presented in this paper. The function of the raw echo simulator is to provide realistic radar return in real time, and form a closed loop system together with the onboard radar equipment and the signal processor. It can be used to verify the performance of the SAR system and imaging algorithm before practical launching. The computer simulation models for the raw echo simulator are analyzed, and some preliminary results of the simulated experiments are given.展开更多
文摘The study on simulation of raw signal for spaceborne SAR aims at producing raw signal to test and evaluate the system and imaging algorithm. The model used for simulation includes a distributed target model, a platform and target geometry model, and a mathematical architecture used for generation of raw echo. Two aspects are stressed, one is the effects of earth ellip soid and attitude errors on radar impulse respense, the other is quick generation of range migration in azimuth frequency domain. Prescribed statistical characteristics of the model account for a realistic speckle of actual image. Finally, examples are given to validate the simulation of raw signal for spaceborne SAR.
文摘he raw echo simulator, one of the fundamental components of Chinas Cband spaceborne Synthetic Aperture Rador(SAR) ground demonstration system is presented in this paper. The function of the raw echo simulator is to provide realistic radar return in real time, and form a closed loop system together with the onboard radar equipment and the signal processor. It can be used to verify the performance of the SAR system and imaging algorithm before practical launching. The computer simulation models for the raw echo simulator are analyzed, and some preliminary results of the simulated experiments are given.
