Research on Multi-channel Signal Processing Method of Pulsed Millimeter-Wave SAR

In order to achieve the comprehensive observation purpose of high-resolution and wide mapping goal, based on the multi-channel synthetic aperture radar (SAR) signal model in the millimeter wave band, the SAR imaging processing process with range multi-channel and azimuth multi-channel is analyzed, and the data of inertial guidance equipment is introduced to achieve parameter calibration for the problem that non-uniform channel reconstruction is easily affected by attitude error. Based on the Ka-band multi-channel SAR airborne flight data, the method is verified. The data processing results show that through two-dimensional multi-channel data processing, the azimuth ambiguity characteristics of SAR images under down-sampling can be effectively improved, and the noise characteristics can be optimized, and the image interpretability can be improved. The research results can provide a reference for the development and application of millimeter-wave multi-channel SAR imaging system.