High resolution rotating fan-beam scatterometer imaging based on sparse recovery

High resolution synthetic aperture imaging using rotating fan-beam scatterometers is studied. First, the working mode is presented. Then, the relationships among pulse repetition frequency, the number of coherent pulses and the unambiguous swath are discussed. Considering the sparsity of the imaging region and the limited number of pulses, we adopt the sparse recovery method to obtain the target images. By utilizing multiple frequency systems, the unambiguous imaging swath is enlarged. Finally, the simulated results confirm the proposed method.