依据中频信号采样与正交相干检波的基本原理,提出了直接对30MHz的雷达中频信号(带宽2MHz)进行采样来实现正交相干检波的方案,给出了计算机定点仿真及硬件实现结果.结果表明其指标比模拟电路提高了一个量级.

According to the principle of IF signal sampling and quadrature coherent detection, the scheme sampling the 30 MHz radar IF signal (Bandwidth= 2MHz) directly is presented. The results of computer simulation and hardware implementation are also provided. It is indicated by testing results that the performance of direct IF processing is superior to the simulative coherent detection.

TN95