摘要
针对P3/P4多相编码雷达信号的检测和参数估计问题,提出了一种基于积分二次相位函数和分数阶傅里叶变换联合分析的处理方法。该方法首先利用此类多相编码信号的二次相位函数在时间—调频率平面为一条平行于时间轴直线的特点,由积分二次相位函数获得信号总能量,通过检测峰值得到信号调频率的估计值;然后采用分数阶傅里叶变换估计载频、带宽、周期等;最后通过仿真分析了检测性能和参数估计性能,仿真结果表明该方法计算量小,并且由于没有交叉干扰项,使得参数估计精度有所提高。
Against the problems of detection and parameter estimation for P3/P4 polyphase codes signal, joint algorithms based on the integrated quadratic phase function and Fractional Fourier transform are proposed. The pol- yphase codes signal＇ s integrated quadratic phase function has its lel with the axis of time , which is used to obtain the estimation of energy concentrated along a ridge that runs paral- the sweep rate. And the algorithm estimates RF, bandwidth, period via Fractional Fourier transform. Finally, the detection performance and parameter estimation performance is evaluated by computer simulations, which shows that the method has a low computational cost and a high precision of parameter estimation.
出处
《科学技术与工程》
北大核心
2013年第19期5673-5678,共6页
Science Technology and Engineering
关键词
多相编码
积分二次相位函数
分数阶傅里叶变换
信号检测
参数估计
polyphase codes integrated quadratic phase function Fractional Fourier transform sig- nal detection parameter estimation
