某型PD雷达直接中频正交采样的研究  

The Study of Direct IF Signal Quadrature Sampling on PD Radar

作　　者：黄振远[1] 朱剑平[1] 

机构地区：[1]空军雷达学院,武汉430019

出　　处：《火力与指挥控制》2010年第3期114-116,共3页Fire Control & Command Control

基　　金：总装备部某型雷达改造预研基金资助项目

摘　　要：在PD雷达系统中,通常采用模拟方法进行正交双通道采样,但是其性能较差。分析了在PD雷达系统中,当多普勒频率不为零的回波信号通过幅相不平衡的正交双通道时,所产生的镜像频率对系统改善因子的影响,并通过相应的仿真研究加以说明。通过采用直接中频正交采样,系统检测性能得到提升,并通过某型雷达实际参数进行了仿真论证。Quadrature double channels sampling using analog circuits has widely been used in PD radar, but it is difficult to obtain perfect balance. When the echo signal whose doppler frequency is not zero passed the quadrature double channels with unbalanced amplitude and pb Lse, the influence to system improvement factor which results from the mirror frequency is analysed and simulated. By using direct IF signal quadrature sampling method, the system detection performance is promoted and this is also demonstrated through the actual parameter in the PD radar.

关 键 词：PD雷达 正交采样 正交插值 镜频抑制 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]