摘要
高精度动目标检测是雷达数字接收机的一项核心技术,现有的多普勒频移估计方法不能满足现代数字接收机的高精度、低计算量、超低信噪比环境等要求。该文提出了一种低信噪比环境下的基于双采样速率的高精度动目标检测技术,它包括基于FFT的欠采样信号频率无模糊估计,高精度多普勒频移估计和基于双采样速率的动目标径向速度估计等算法。
High accuracy moving target detection is a key technique in the digital radar receiver. The Doppler frequency estimation methods which have been presented can not satisfy the performances of modern digital receivers such as high estimation accuracy, less computation, super low SNR circumstance, etc. In this paper, a high accuracy detection technique of moving target based on double sample rate in low SNR circumstance is proposed, and it includes three main techniques, i.e. unambiguous frequency estimation of sub-sampling signal based on FFT, high accuracy Doppler frequency estimation and radial rate estimation of moving target based on double sample rate.
出处
《电子与信息学报》
EI
CSCD
北大核心
2005年第2期332-333,共2页
Journal of Electronics & Information Technology
关键词
欠采样
无模糊频率估计
多普勒频移估计
双采样速率
动目标检测
Sub-sampling,Unambiguous frequency estimation, Doppler frequency estimation, Double sample rate, Moving target detection
