大规模多入多出技术的短波地波安全传输方法  

Secure transmission of high frequency ground waves based on massive multiple input multiple output

作　　者：李岩 丁国如 崔丽 王海超 徐以涛 LI Yan;DING Guoru;CUI Li;WANG Haichao;XU Yitao(College of Communications Engineering,Army Engineering University of PLA,Nanjing 210007,China)

机构地区：[1]陆军工程大学通信工程学院,江苏南京210007

出　　处：《哈尔滨工程大学学报》2023年第6期1037-1042,1080,共7页Journal of Harbin Engineering University

基　　金：国家重点研发计划(2018YFB1801103);国家自然科学基金项目(61931011,U20B2038,62001514,62271501,62171462,62231027)。

摘　　要：为提升地波通信的用户速率和安全性能,本文结合多点协同和大规模多入多出技术,提出了一种基于多站协同的地波传输方法。在本文中,发送给用户的原始信息被核心网分成了若干个子信息,这些子信息被相应固定站发给用户。使用多个配备多根天线的固定站进行协同预编码,建立了基于预编码向量、发射功率和固定站选择联合优化的用户速率最大化问题。设计了基于共轭波束赋形的预编码方法,推导了发射功率闭式解。针对固定站选择混合整数优化问题,提出了一种低复杂度固定站选择算法。仿真结果表明所提方法可以提升用户速率和安全速率,提出的功率优化方法可以在保证用户速率的前提下提升安全速率,固定站选择算法的性能几乎与穷搜算法相同,证明了所提算法的有效性。A ground-wave transmission method based on multistation coordination is proposed to improve the user rate and security performance of ground-wave communication by combining multipoint coordination and massive multiple input multiple output technology.In this system,the core network divides the original message sent to the user into several sub-messages,which are then sent to the user by a corresponding fixed station.A joint optimization model comprising the precoding vector,transmit power,and fixed station selection is established using multiple fixed stations equipped with multiple antennas for cooperative precoding to maximize the user rate.The closed-form solution of transmit power is derived using a precoding method based on conjugate beamforming.This paper proposes a low-complexity algorithm for a fixed station selection to solve the mixed-integer optimization problem of fixed station selection.The simulation results show that the proposed method can improve user and security rates.Furthermore,the proposed power optimization method can improve the security rate on the premise of ensuring the user rate.The performance of the proposed fixed station selection algorithm is almost similar to that of the exhaustive search algorithm,proving the effectiveness of the algorithm.

关 键 词：地波通信 大规模多入多出技术 安全通信 短波通信 波束赋形 功率优化 合作通信 海洋通信 

分 类 号：TN919.3[电子电信—通信与信息系统]