多部不同体制雷达信号源结构与算法设计

摘要

A fast and simple system that can output simultaneously multiple radar base-band signals is proposed.The DSP is applied to the main control data and the CPLD is applied to control directly DDS,which is to accurate control signal.For the key timing of multiple and different radar,the system adopts time-sharing algorithm and builds the scale of time queue.Besides,probability theory is used to analyze the pulse coverage,and the tolerance defined is guaranteed to satisfy the requirement of performance.Experiment indicates that the power of system output achieve about-11 dBm for the carrier wave or the pulse wave.%提出了一种结构简单、速度快的系统能同时输出多部雷达基带信号.为了达到精准控制信号的输出,采用高速DSP作为数据的主控,并由CPLD直接控制DDS产生雷达基带信号;针对输出多部不同体制雷达基带信号的关键时序问题,使用分时复用算法并建立时间队列长度;另外,采用概率统计论分析脉冲覆盖率,并通过设置脉冲容差以保证信号满足性能指标要求.经测试,证明了系统能输出各种体制脉冲雷达以及连续波基带信号,输出功率为-11 dBm 左右.