摘要
针对雷达在检测弱目标能力的不足,基于雷达信号与噪声的实际模型,为构建基于实值离散Gabor变换的移动目标检测系统(MTD),提出了一种基于实值离散Gabor变换(RDGT)的快速的雷达信号Gabor表示算法。基于DCT的实值离散Gabor变换是一种重要的联合时频域分析工具,文中采用基于DCT的实值离散Gabor变换的算法对雷达信号进行Gabor域表示,并给出了一些仿真实验来验证算法的有效性。仿真结果表明该算法能够将被白噪声污染的不同多普勒频率不同到达时间的雷达目标回波信号在联合时频域中进行有效地区分。
For the insufficiency of detecting weak radar targets,basing on the radar signals and noise actual model,a fast algorithm for the Gabor representation for radar signals is presented to structure the moving target detection（MTD） system based on real-valued discrete Gabor transforms.In this paper,as an importmant joint time-frequency analysis tool,DCT-based real-valued discrete Gabor transform is utilized to represent the radar signals in the Gabor domain.Numerical examples are given to demonstrate the efficiency of the algorithm.The simulation results show that the proposed algorithm is capable of separating echoes of the objects with different doppler frequencies,various arrival times,and additive white noises.
出处
《计算机技术与发展》
2010年第10期131-136,共6页
Computer Technology and Development
关键词
实值离散GABOR变换
雷达信号
联合时频分析
real-valued discrete Gabor transforms
radar signals
joint time-frequency analysis
