摘要
在我国全力推进“天地一体化”国家重大科技战略的特殊背景下,基于空基平台的毫米波高速通信系统不仅是构建国内战略通信安全的突破口,更是抢占国际军事宽带战术互联网制高点的关键切入点。然而,该系统独特的信道条件、硬件限制以及超高性能指标都对其实现提出了挑战。针对基于混合波束成形技术的多用户视距MIMO通信系统,提出了一种基于块对角化几何均值分解的预编码算法,并应用字典学习的算法进行混合波束成形设计。数值仿真实验显示基于所提算法的多用户视距MIMO混合波束成形系统的性能接近最优的全数字波束成形系统的性能。
Under the special background of national major science and technology strategy of the Space-Ground Integration,the millimeter-wave high-speed communication system based on space-based platform is not only a sally port to build domestic strategic communication security,but also a key entry point to seize the commanding heights of the international military broadband tactical Internet. However,the unique channel condition,the hardware limitation and the ultrahigh performance indicators bring challenges to the implementation of this communication system. Therefore,in allusion to the multi-user line-ofsight(LoS)multiple-input multiple-out(MIMO)communication system based on the hybrid beamforming,a kind of precoding algorithm based on block diagonalization-geometric mean decomposition(BD-GMD) is proposed,and the dictionary learning algorithm is applied to the design of hybrid beamforming. The results of the numerical simulation experiment indicate that the performance of multi-user LoS MIMO hybrid beamforming system based on the proposed algirithm can approach the optimal performance of the full-digital beamforming system.
作者
刘继鹏
朱立
郭鹏飞
周壮
LIU Jipeng;ZHU Li;GUO Pengfei;ZHOU Zhuang(China North Communication Technology Co.,Ltd.,Xinxiang 453002,China;School of Electronic Information and Electrical Engineering,Changsha University,Changsha 410073,China;College of Electronic Science and Technology,National University of Defense Technology,Changsha 410073,China)
出处
《现代电子技术》
2022年第19期9-13,共5页
Modern Electronics Technique
