DDS可实现的宽带线性调频信号延时补偿技术

发布时间：2017-12-27 01:16

本文关键词：DDS可实现的宽带线性调频信号延时补偿技术　出处：《火控雷达技术》2016年03期 　论文类型：期刊论文

【摘要】：对于多通道宽带线性调频信号发射波束的空间合成,传统的相位控制方法由于孔径渡越问题限制了发射信号的带宽。针对这一问题,本文对线性调频信号延时表达式进行分析,得到需要补偿的部分,并基于Matlab仿真结果,根据一定的评估标准,得出几种补偿方法的适用范围及优缺点,提出一种DDS芯片可实现的宽带线性调频信号的延时补偿技术。结合DDS芯片的具体指标,推导出DDS芯片可以达到的延时精度的表达式,为将来基于DDS芯片的宽带线性调频信号发射波束的空间合成技术提供理论基础。
[Abstract]:For the multi-channel wideband LFM signal transmitting beam's spatial synthesis, the traditional phase control method restricts the bandwidth of the transmitted signal due to the aperture crossing problem. To solve this problem, this paper analyzes the delay of LFM signal expression, get the compensation, and based on the simulation results of Matlab, according to a certain evaluation standard, obtained the scope of application of several compensation methods and advantages and disadvantages of time delay compensation of wideband LFM signal presents a DDS chip can realize the. Combined with the specific index of DDS chip, we deduce the expression of delay accuracy achieved by DDS chip, and provide a theoretical basis for the future space synthesis technology of broadband LFM signal transmitting beam based on DDS chip.
【作者单位】：中国电子科技集团公司第38研究所;
【分类号】：TN957.51
【正文快照】： 0引言相控阵雷达具有敏捷快速的波束扫描能力及捷变能力,具有多目标截获、跟踪、自适应等优点[1-2];而大瞬时带宽的信号可以提高相控阵雷达的抗干扰能力,并具有更高的测距精度及分辨率,有利于目标的成像、识别与分类[3]。因此,宽带相控阵雷达技术是现代相控阵雷达技术发展的主

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