矢量信号处理结合DEMON谱的多目标分辨算法  

Multi-targets distinguish algorithm by combination of DEMON line spectrum with vector signal processing

作　　者：王逸林 殷敬伟 梅继丹 

机构地区：[1]哈尔滨工程大学水声技术国防重点实验室,黑龙江哈尔滨150001

出　　处：《华中科技大学学报（自然科学版）》2010年第4期22-25,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：水声技术国防科技重点实验室基金资助项目(9140C200210080C2002)

摘　　要：将矢量信号处理技术与DEMON谱分析技术相结合,提出矢量DEMON谱分析方法,利用矢量信息提取DEMON谱并计算线谱方位,再根据线谱方位和各个线谱间频率差分别提取多个目标轴频.该方法不仅可获得更高的处理增益,同时通过声压、振速分频段线谱融合能够得到更加完整的DEMON线谱簇;且在单传感器条件下,应用结合矢量信息的最大公约数算法,能够提取多目标的轴频特征、分辨不同目标并测量方位.仿真结果验证了所提方法的有效性和可行性.A new method of vector DEMON （detection of envelope modulation on noise） spectral analysis was proposed by combining vector signal processing and DEMON spectral analysis.In this method,DEMON spectrum was extracted and the directions of line spectrum were calculated by the use of using vector signal information.Then the shaft frequencies of multi-targets can be extracted based on the directions of the line spectrum and the frequency differences between every line spectrum.The new method not only has more gain than the old one,but also a more completed DEMON spectrum can be obtained by frequency division line spectrum fusion.Finally,in the condition of one vector sensor,the largest common divisor algorithm based on vector information is presented.The method can extract shaft frequency features of multi-targets.The efficacy and feasibility of the method are verified by the simulation.

关 键 词：信号处理 特征提取 矢量信号处理 轴频提取 DEMON谱分析 

分 类 号：TB566[交通运输工程—水声工程] TN911[理学—物理]