基于水声扩频信号的空时分簇DoA估计算法  

Space-time division cluster DoA estimation algorithm based on UWA spread spectrum signal

作　　者：周锋 张宝胜[1,2,3] 张文博[1,2,3] ZHOU Feng;ZHANG Baosheng;ZHANG Wenbo(Acoustic Science and Technology Laboratory,Harbin Engineering University,Harbin 150001,China;Key Laboratory of Marine Information Acquisition and Security(Harbin Engineering University),Ministry of Industry and Information Technology,Harbin 150001,China;College of Underwater Acoustic Engineering,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]哈尔滨工程大学水声技术重点实验室,黑龙江哈尔滨150001 [2]海洋信息获取与安全工信部重点实验室(哈尔滨工程大学),黑龙江哈尔滨150001 [3]哈尔滨工程大学水声工程学院,黑龙江哈尔滨150001

出　　处：《通信学报》2022年第8期100-108,共9页Journal on Communications

基　　金：国家自然科学基金资助项目(No.11974090,No.U1806201);国防基础科研计划基金资助项目(No.JCKY2019604B001)。

摘　　要：为了解决波达方向估计稳定性差、分辨率低、低信噪比下性能下降严重等问题,针对水声扩频信号提出了一种空时分簇波达方向估计算法。该算法利用时频二维搜索的思想,将常规波束成形和扩频序列结合,设置角度间隔搜索水声扩频信号的入射角度和到达时延,将空间谱上升至时延-角度谱,使其保持较高的分辨率。利用扩频序列的特性,使空时分簇波达方向估计具有抗干扰和低信噪比下稳健工作的能力。仿真与水池实验结果证明,与传统波达方向估计算法相比,所提算法在抗干扰性、分辨率、抗噪声方面具有更好的性能,同时不需要信源数估计以及角度预估计,具有更加稳健的性能。To solve the problems of poor stability,low resolution,and performance degradation under low signal-to-noise ratio(SNR)of the direction of arrival(DoA)estimation,a space-time division cluster(STDC)DoA estimation algorithm was proposed for under water acoustic(UWA)spread spectrum signal.The idea of the time-frequency two-dimensional search was used to combine the conventional beamforming with the spread spectrum sequence,set the angle interval to search the incidence angle and the arrival delay of the spread-spectrum signal,and increased the spatial spectrum to the delay angle spectrum,which kept the high resolution.STDC-DoA estimation can be anti-interference and stable operation under low SNR by using the characteristics of spread spectrum sequence.Finally,through simulation and pool experi-ment,it was proved that compared with the traditional DoA estimation algorithm,the proposed algorithm has better per-formance in anti-interference,resolution,and anti-noise.Meanwhile,the proposed algorithm does not need signal source number estimation and angle prediction and has more robust performance.

关 键 词：波达方向估计 空时分簇 水声扩频信号 阵列信号处理 

分 类 号：TB566[交通运输工程—水声工程]