摘要
提出了一种基于DPT的宽带非线性调频信号的DOA估计算法。首先将非线性调频(NLFM)信号建模为高阶多项式相位信号(PPS)模型,然后通过高阶瞬时矩进行多项式相位变换。接收信号将变换为单个正弦信号和新的噪声。再利用ROOT-MUSIC或者ESPRIT算法对变换得到的正弦信号的波达方向进行估计。理论分析和仿真结果表明,该方法计算量小,易于实现,且估计性能好。
A novel algorithm for the direction of arrival (DOA) estimation of wideband nonlinear frequency modulation signal using discrete polynomial-phase transform (DPT) is introduced. In this paper, firstly, a nonlinear FM(NLFM) signal is modeled as a high-order polynomial phase signal (PPS).And then,through high order instantaneous moments,the polynomial phase transformation is carried on.After that,the higher-order polynomial phase signal can be transformed into a single sinusoidal signal and the new noise.The ROOT-MUSIC or ESPRIT algorithm is then used to estimate the DOA of the single sinusoidal signal. Theoretical analysis and simulation results show this method is simply and estimation performance is good.
出处
《电子技术应用》
北大核心
2011年第10期103-107,共5页
Application of Electronic Technique
基金
国家自然科学基金项目(61071196)
国家自然科学基金-中物院NSAF联合基金项目(10776040)
教育部新世纪优秀人才支持计划(NCET-10-0927)
信号与信息处理重庆市市级重点实验室建设项目(CSTC
2009CA2003)
重庆市自然科学基金项目(CSTC
2009BB2287
CSTC
2010BB2398
CSTC
2010BB2411)
关键词
非线性调频信号
高阶多项式相位信号
多项式相位变换
波达方向估计
nonlinear FM
higher order polynomial phase signal
polynomial phase transform
direction of arrival estimation