The Insar Launch Channel Simulation And Analysis

Especially in spaceborne InSAR, interferometric synthetic aperture radarsystem consisteted with a number of complex electronic equipment involvesmany areas of technonlogy. The system simulation is an important aspect in thedesign and development. The thesis describes the InSAR system errors base onthe dot target. And we try to quantificationally or qualitatively analysis eachmodule of the transmit channel. By emulating the interference processing ofpoint target, We attempt to product some useful conclutions for the InSARsystem design.The height measurement error can’t be quantificationally analysised inInSAR system. Emulating a dot target with a certain elevation can bequantificationally analysised the impact of height measurement error in transmitchannel’ errors. Firstly, we analysis the impact of height measurement in boththe quantization error of DDWS and the over sampling. Secondly, we describethe principle of quadrature modulation, and quantificationally analysis theimpact in both DC offset and amplititude and phase errors. Then we analysis theimpact in the phase noise of multiplier, and describe the impact in the orthogonalmodulation error which passes the multiplier. Finally, we quantificationallyanalysis the impact in the orthogonal modulation error which passes the Salehmodel of the nonlinear power amplifier.By the interference processing of point target, it can be quantificationallyanalysised the impact of height measurement error both coarse registration andfine registration. In the ideal interference processing of dot target, the transmitchannel of errors’ simulation can be quantificationally analysised the impact ofheight measurement error. We qualitatively describe the linear relationshipbetween orthogonal modulation errors and height measurement error, and it canbe keep in transmit channel.Although using the dot target can be quantificationally analysised the heightmeasurement error, it requires further investigation in dot targets...