一种改进的峰均功率比判源方法  

Modified peak-to-average power ratio method for source number judgement

作　　者：徐向艺[1] 王建玺[1] 

机构地区：[1]平顶山学院软件学院,河南平顶山467002

出　　处：《现代电子技术》2015年第14期8-11,共4页Modern Electronics Technique

基　　金：国家自然科学基金资助项目(U1204611);河南省科技厅科技发展计划项目(134300510037)

摘　　要：在阵列信号处理领域,信号源数的估计是一个重要问题。EIT方法有着良好的检测性能,但对不等强目标检测时性能严重下降。因此提出一种改进的峰均功率比判源方法,利用特征向量对接收数据进行加权,然后计算其峰均功率比,通过利用特征值与峰均功率比值在区分噪声和信号方面的一致性,引入一个递归过程,检测信号源个数。仿真结果显示,采用此方法不受目标强度差的影响,对不等强双目标有优良的检测性能。Estimation of the number of sources is an important issue in array signal processing. EIT is a well-known excel-lent method for source number detection. However,the detection capacity of this method is weak while the intensity of sources is quite different. A modified peak-to-average power ratio method is proposed in this paper. The eigenvector is employed to weigh the received data and calculate the peak-to-average power ratio,then according to the fact that both the eigenvalues and the peak-to-average power ratio have valuable information in distinguish signal and noise,the source number is detected by introducing a recursive procedure. The simulation results show that the method is efficient,and does not be influenced by the intensity differ-ence between the targets,and has good performance when the target intensity is unequal.

关 键 词：目标检测 特征向量 峰均功率比 不等强多目标 

分 类 号：TN911.34[电子电信—通信与信息系统]