基于分数阶运算的多相码信号检测与参数估计  

Detection and Parameter Estimation of Polyphase Codes Radar Signal Based on Fractional Operation

作　　者：王晓峰[1] 周瑞[1] 蒋黎 

机构地区：[1]空军航空大学信息对抗系,长春130022

出　　处：《电子信息对抗技术》2018年第1期18-22,共5页Electronic Information Warfare Technology

摘　　要：针对目前多相码信号检测与参数估计方法运算复杂度高的问题,提出了一种基于分数阶运算的多相码信号检测与参数估计方法。该方法首先依据分数阶自相关与模糊函数径向切片的等价关系,实现了多相码信号的检测与调频率估计,然后联合分数阶傅里叶变换(Fr FT)估计多相码信号的其它调制参数。整个方法无需计算时频平面,且能够利用FFT实现,显著降低了多相码信号检测与参数估计的运算复杂度。仿真实验表明,该方法能够快速有效地实现多相码信号检测与参数估计。To solve the problem of higher computational complexity in detection and parameter estimation of the polyphase codes signal, an algorithm based on fractional operation is proposed. The polyphase codes signal is detected and the sweep rate base on the fractional autocorrelation is estimated, and then the other parameters via the fractional Fourier transform （FrFT） are estimated. The proposed algorithm, which does not compute the time-frequency plane and can be achieved by the FFT, observably reduces the computational complexity of polyphase codes signal detection and parameter estimation. The computer simulations verify the effectiveness of the algorithm.

关 键 词：信号检测 参数估计 多相码信号 分数阶运算 

分 类 号：TN971.1[电子电信—信号与信息处理]