2006(1):6-8.
Abstract:
A design and implementation method of ISAR target IF echo is introduced. At first, the ISAR IF echo characteristics are analyzed, taking a stationary point-target as an example. Then, according to the signal property, the signal generation technique based on AD9857 quadrature digital upconverter is introduced. At last, how to solve the problem of signal coherence is described. According to practice, this simulator has stable signal phase, pure signal spectrum, and ability to produce any complex waveform. In the development process of one kind of high resolution radar used for space target searching and tracking, this simulator has been successfully employed.