基于不完全重合信号的单快拍DOA估计算法研究

doi:10.11959/j.issn.1000-436x.2021232

通信学报 ›› 2021, Vol. 42 ›› Issue (12): 88-95.doi: 10.11959/j.issn.1000-436x.2021232

基于不完全重合信号的单快拍DOA估计算法研究

曲明超¹^,², 司伟建¹^,², 袁雅芝¹^,²

¹ 哈尔滨工程大学信息与通信工程学院，黑龙江哈尔滨 150001
² 哈尔滨工程大学先进船舶通信与信息技术工业和信息化部重点实验室，黑龙江哈尔滨 150001

修回日期:2021-08-02 出版日期:2021-12-01 发布日期:2021-12-01
作者简介:曲明超（1998- ），男，河南南阳人，哈尔滨工程大学博士生，主要研究方向为阵列信号处理、极化敏感阵列DOA估计等
司伟建（1971- ），男，黑龙江哈尔滨人，博士，哈尔滨工程大学研究员，主要研究方向为阵列信号处理、宽带信号检测、信号分选、数字信道化等
袁雅芝（1998- ），女，河北保定人，哈尔滨工程大学硕士生，主要研究方向为阵列信号处理、DOA估计解相干算法
基金资助:
国家自然科学基金资助项目(61971155);黑龙江省自然科学基金资助项目(JJ2019LH1760);航空科学基金资助项目(2019010P6001)

Research on single snapshot DOA estimation algorithm based on incompletely overlapped signal

Mingchao QU¹^,², Weijian SI¹^,², Yazhi YUAN¹^,²

¹ College of Information and Communication， Harbin Engineering University， Harbin 150001， China
² Key Laboratory of Advanced Marine Communication and Information Technology， Ministry of Industry and Information Technology， Harbin Engineering University， Harbin 150001， China

Revised:2021-08-02 Online:2021-12-01 Published:2021-12-01
Supported by:
The National Natural Science Foundation of China(61971155);The Natural Science Foundation of Heilong-jiang Province(JJ2019LH1760);The Aeronautical Science Foundation of China(2019010P6001)

摘要/Abstract

摘要：

针对传统波达方向（DOA）估计算法没有充分利用有源诱饵和雷达的信号特征，导致反辐射导弹的角度分辨能力差的问题，提出了一种基于不完全重合信号的极化敏感阵列单快拍测向算法。首先，对阵列接收到的单快拍数据进行极化平滑处理；然后，利用雷达信号和诱饵信号是不完全重合信号的特点，对构造的共轭复制增广矩阵进行差分，得到各信号的共轭复制增广矩阵；最后，通过求解凸优化问题分别求解每个信号的 DOA 参数。仿真结果表明，与传统算法相比，所提算法具有更高的估计精度和更低的算法复杂度。

关键词: 极化敏感阵列, 单快拍, 不完全重合信号, DOA估计, 极化平滑

Abstract:

To address the problem that traditional direction-of-arrival （DOA） estimation algorithms did not fully utilize the signal characteristics of active decoys and radar， which led to poor angular resolution of anti-radiation missile， a single snapshot direction finding algorithm for polarization sensitive array based on incompletely overlapped signals was proposed.Specifically， the signal data received by the array was firstly processed by polarization smoothing.After that， exploiting the signal characteristics of incompletely overlapped signals of radar and active decoys， the constructed conjugate replication augmented matrix was differentiated to obtain each signal’s conjugate replication augmented matrix.Finally， DOA estimation results of each signal were acquired by solving a convex optimization problem.Numerical results demonstrate that the proposed method shows superior estimation accuracy and lower computational complexity compared with the conventional algorithms.

Key words: polarization sensitive array, single snapshot, incompletely overlapped signal, DOA estimation, polarization smoothing

中图分类号:

TN911.7

曲明超, 司伟建, 袁雅芝. 基于不完全重合信号的单快拍DOA估计算法研究[J]. 通信学报, 2021, 42(12): 88-95.

Mingchao QU, Weijian SI, Yazhi YUAN. Research on single snapshot DOA estimation algorithm based on incompletely overlapped signal[J]. Journal on Communications, 2021, 42(12): 88-95.

图/表 11

图1

图2

表1

表2

不完全重合信号的单快拍DOA估计算法运算量"

步骤	复数乘法运算量
奇异值分解	20M ³-4M²
求解矩阵 $Ψ_{0}$	24（M-1）+16/3
循环次数	K

表2

图3

图4

图5

图6

图7

图8

图9

参考文献 15

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步骤	复数乘法运算量
协方差矩阵	2M ²
特征值分解	20M ³-20M²
单次谱峰搜索	M ³/2+2M²+39M
搜索点数	121

基于不完全重合信号的单快拍DOA估计算法研究

Research on single snapshot DOA estimation algorithm based on incompletely overlapped signal

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