摘要
针对Wigner-Ville变换、Radon-Wigner变换估计P3/P4多相编码雷达信号参数存在运算量大、估计精度低等问题,提出了基于Radon-Ambiguity变换和分数阶傅立叶变换(FRFT)联合分析的参数快速估计方法。该方法采用Radon-Ambiguity变换估计信号调制斜率,采用分数阶傅立叶变换估计载频、周期等,通过两次一维搜索峰值来估计信号的参数,与Wigner变换、Radon-Wigner变换的二维搜索峰值相比,运算量大大降低,且提高了参数估计精度。仿真结果证明了该方法的有效性。
Against the problems of more runtime and lower precision via Wigner-Ville distributions and Radon-Wigner transform to estimate polyphase codes of radar signal parameters,joint algorithms based on Radon-Ambiguity transform and Fractional Fourier transform are proposed to estimate signal parameters.This algorithm estimates modulation slope of signal via Radon-Ambiguity transform,and RF via Fractional Fourier transform.Compared with Wigner-Ville distributions and two-dimension search of Radon-Wigner transform,the signal parameters are estimated via double one-dimension search,the simulation shows that it takes fewer runtime,and the precision of parameter estimated is higher.The simulation results prove the effectiveness of this algorithm.
出处
《电子信息对抗技术》
2010年第5期39-43,共5页
Electronic Information Warfare Technology
