Radar Multi-target Generation System If Signal Slip Design And Implementation

Since Modern radars' functions are complicated more and more, the difficulty of debugging and testing radars' components and the whole system is increasing. At the same time, radars' development budget and period is increased and delayed by the following factors, the high cost of outdoor experimentations, the huge size of system and completed kinds of devices. Therefore, in modern radar technology domain, the development of different sorts of radar-simulator becomes a hotspot.Based on certain system of radar-echo generator, with the main controlling processor of digital signal processor ADSP21161 and the signal generator of direct digital synthesis (DDS) device AD9854, this paper designs and realizes the hardware and software of the intermediate frequency radar echo generator. Hardware and software are two proportions of this article's work:In the hardware proportion, this article designs and realizes the intermediate frequency radar echo generator based on the scheme of "DSP + DDS+ Attenuating net".In the software proportion, this article searches and solves the following questions: the principal of radar simulating; working out the cross section of targets with inverse method; the principal of the phase-complementing of the full-phase-parameter signal generated by DDS; the principal of generating signal by DDS , these signals include general pulse, linear frequency modulation, nonlinear frequency modulation and phase modulation; analysis of equally-divided method for nonlinear frequency modulation, compiling DSP program; the communication protocol between DSP and embedded system, and so on.