详细论述了半实物仿真系统中的毫米波目标模拟器体系结构和实现。给出了基于“相干移频转发“方式的模拟器射频分机电路的实现。采用直接数字合成(DDS)技术，提出了新的基带回波功率谱的合成方法，显著降低了基带信号合成的时钟频率和数据存储容量。采用时域和频域图形生成数据的新方法，为模拟数据的产生提供了简化的手段。该模拟器为国内首台毫米波主动导引头目标模拟器，实现了复杂目标与地物杂波的模拟。

This paper describes in detail the architecture and realization of a MM wave targets simulator which included in a certain semi object simulation system. The RF circuits configuration of this simulator based on "coherent frequency shifted transmit" is provided. A new synthesis method of baseband echo power spectrum, which adopts Direct Digital Synthesis (DDS) technology, reduces greatly the clock rate and data memory. A new way that generates simulation data from both time domain and frequency domain waveform is raised to provide a simple means for the generation of data. This simulator is the first in China ever developed for the simulation of MM wave active seeker. The simulation of complex targets and terrain clutters is realized.

TN959.73 TN95