一种高效快速的二相码旁瓣抑制算法  

An Efficient and Fast Sidelobe Suppression Algorithm for Biphase Codes

作　　者：陈洪猛[1] 李明[1] 李响[1] 

机构地区：[1]西安电子科技大学雷达信号处理国家重点实验室,陕西西安710071

出　　处：《雷达科学与技术》2012年第1期48-53,共6页Radar Science and Technology

基　　金：国家部委预研基金(No.9140C0103071003);国防预研基金(No.9140A01060411DZ0101)

摘　　要：高效的旁瓣抑制能力可以提高雷达对微弱目标的检测能力,传统的旁瓣抑制方法中,递归最小二乘算法(RLS)不仅数值稳定性差,而且运算量大。通过合理构建脉冲压缩后的信号模型,提出一种基于横向滤波器的快速旁瓣抑制算法。该算法采用投影技术和向量空间法,不仅大大减小了运算量,而且具有高效的旁瓣抑制特性。仿真实验表明:该算法迭代2次就可收敛于真值,迭代5次即可达到RLS算法迭代100次的旁瓣抑制效果,并且信噪比损失要低于RLS算法。The ability of radar to detect weak targets can be greatly improved by efficient sidelobe suppression.The traditional recursive least square（RLS） algorithm suffers from its low numerical robustness and excessive computational complexity.A reasoned signal model after pulse compression is constructed and a fast sidelobe suppression algorithm derived through the use of projection technology and vector space concept is introduced in this paper.The sidelobe suppression algorithm is fast and efficient.Simulation results show that the proposed algorithm can converge to the real value with 2 times of iteration and can achieve a 100-times sidelobe suppression effect of RLS with 5 times of iteration,and signal to noise ratio（SNR） is lower than RLS.

关 键 词：二相码 脉冲压缩 旁瓣抑制 快速横向滤波算法 递归最小二乘算法 

分 类 号：TN958.3[电子电信—信号与信息处理] TN957.51[电子电信—信息与通信工程]