面向物联网无人机通信的短突发CPM信号盲均衡算法

doi:10.12305/j.issn.1001-506X.2023.06.29

系统工程与电子技术 ›› 2023, Vol. 45 ›› Issue (6): 1847-1855.doi: 10.12305/j.issn.1001-506X.2023.06.29

• 通信与网络 • 上一篇

面向物联网无人机通信的短突发CPM信号盲均衡算法

潘子豪, 谢琛, 王桁, 魏以民, 郭道省

陆军工程大学通信工程学院, 江苏南京 210007

收稿日期:2022-04-18 出版日期:2023-05-25 发布日期:2023-06-01
通讯作者: 郭道省
作者简介:潘子豪(1998—), 男, 硕士研究生, 主要研究方向为信道估计与均衡
谢琛(1990—), 男, 博士研究生, 主要研究方向为无人机集群通信
王桁(1983—), 女, 副教授, 博士, 主要研究方向为卫星通信
魏以民(1973—), 男, 副教授, 博士, 主要研究方向为无线通信、深度学习
郭道省(1973—), 男, 教授, 博士, 主要研究方向为卫星通信、通信抗干扰、空天地一体化网络、物理层安全、无人机通信等

Blind equalization algorithm of short burst CPM signal for UAV communication in Internet of Things

Zihao PAN, Chen XIE, Heng WANG, Yimin WEI, Daoxing GUO

College of Communication Engineering, Army Engineering University of the PLA, Nanjing 210007, China

Received:2022-04-18 Online:2023-05-25 Published:2023-06-01
Contact: Daoxing GUO

摘要/Abstract

摘要：

针对物联网无人机通信中短突发连续相位调制(continuous phase modulation, CPM)盲均衡算法复杂度高、收敛差等问题, 提出了一种基于期望最大化-维特比(expectation maximization Viterbi, EMV)的盲均衡算法。首先, 将Lazy维特比算法嵌入到期望最大化(expectation maximization, EM)算法的迭代过程中, 得到一种低复杂度的盲均衡算法; 然后, 基于盲信道捕获(blind channel-acquisition, BCA)方法构建了一组初值集, 克服了算法对初值的敏感性, 同时提升了信道估计的收敛性能。理论分析和实验结果表明, 所提的盲均衡算法能够有效兼顾收敛性和计算复杂度, 相比传统方法, 在性能损失很小的条件下可大幅度降低计算成本, 并且具有良好的鲁棒性。

关键词: 盲均衡, 短突发, 期望最大化算法, Lazy维特比算法

Abstract:

Aiming at the problem of high complexity and poor convergence of blind equalization algorithm of short burst continuous phase modulation (CPM) in unmanned aerial vehicle communication in Internet of Things, an expectation maximization Viterbi (EMV) blind equalization algorithm is proposed. Firstly, a low-complexity blind equilibrium algorithm is obtained by embedding the Lazy Viterbi algorithm in the iterative process of the expectation maximization (EM) algorithm, and then a set of initial value is designed based on the blind channel-acquisition (BCA) method, which overcomes the proposed algorithm's sensitivity for the initial value and improve the convergence performance of channel estimation. Theoretical analysis and simulation results show that compared with traditional methods, the proposed blind equalization algorithm can take into account both convergence and computational complexity, and greatly reduce the computational cost under the condition of small performance loss, and has good robustness.

Key words: blind equalization, short burst, expectation maximization (EM) algorithm, Lazy Viterbi algorithm

中图分类号:

TN914

潘子豪, 谢琛, 王桁, 魏以民, 郭道省. 面向物联网无人机通信的短突发CPM信号盲均衡算法[J]. 系统工程与电子技术, 2023, 45(6): 1847-1855.

Zihao PAN, Chen XIE, Heng WANG, Yimin WEI, Daoxing GUO. Blind equalization algorithm of short burst CPM signal for UAV communication in Internet of Things[J]. Systems Engineering and Electronics, 2023, 45(6): 1847-1855.

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参数	设置
频率脉冲g(t)	2-RC
进制数M	2
调制指数h	1/2
波特率/kHz	150
训练比特	4, 6, 8
数据长度/比特	66
衰落信道	两径莱斯衰落
最大时延拓展/μs	7
莱斯因子/dB	29
采样点/符号	2

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面向物联网无人机通信的短突发CPM信号盲均衡算法

Blind equalization algorithm of short burst CPM signal for UAV communication in Internet of Things

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