宽带单元数字阵雷达延时方法  

Time-delay Technology for Broadband Digital Array Radar

作　　者：朱张勤[1] 郑万青[1] 

机构地区：[1]南京电子技术研究所,南京210039

出　　处：《现代雷达》2016年第6期27-29,33,共4页Modern Radar

摘　　要：针对宽带数字阵雷达相位扫描时的孔径渡越问题,分别研究了针对宽带线性调频信号的上行链路移频移相和下行链路整数和分数阶延时相结合的单元级数字延时方法,克服了宽带数字阵雷达由于方位大角度扫描导致的波束色散、增益下降问题,替代模拟延时线补偿方法,降低了雷达系统的结构复杂度和系统重量。文中通过分析并计算了上行链路需要的移频量和移相量、以及数字有限冲击响应滤波器延时的响应特性,并通过仿真验证了上、下行链路补偿的效果。To solve the aperture fill time caused by wide angle scanning of broadband digital array radar, the method of digital timedelay compensation was proposed for the transmit and receiving chain to the broadband line-frequency modulation （ LFM ） signal. The method can increase the beam formation quality and reduce the array gain losing. By using the digital time-delay compensation, the delay line can be substituted by digital chip, which can simplify the broadband digit array system. In this paper, the compensation value of frequency and phase is figured and the response characteristics of FRI filter is analyzed. Then, compensation affection of transmit and receiving chain is simulated.

关 键 词：宽带数字阵雷达 孔径渡越 延时补偿 

分 类 号：TN958[电子电信—信号与信息处理]