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| 1 | 海上通信技术发展与研究综述显示文摘随着海上活动日益频繁,海上通信技术的发展有着重要的战略地位。但海上环境复杂多变、通信系统标准不统一等因素导致海上通信发展明显滞后。首先,根据通信方式的不同,将海上通信分为基于空域、陆地、海域和跨域协同4个主要组成部分,从工业界和学术界两个方向概述了全球范围内海上通信的发展进程和研究现状;然后,针对不同系统之间的联系和区别,分析了目前海上通信存在的主要问题;最后,具体阐述了新一代海上通信系统发展所面临的技术挑战,包括海浪运动模型学习、海上信道建模、大气波导效应和微波散射效应。 | 董浩 宋亮 化存卿 刘玲亚 唐俊华 | 2022 | 电信科学2022,38,5: | 1 |
| 2 | Layered D2D NOMA显示文摘This paper investigates a layered power allocation(PA)non-orthogonal multiple access(NOMA)scheme for device-to-device(D2D)relaying networks,where the strategy of partial data transmission at relay nodes are adopted to improve the efficiency of resources.In addition,to satisfy different quality-of-service(QoS)requirements from multiple users,layered and grouped manners are involved.Moreover,the closed-form expressions in terms of the sum-rate(SR)and outage probability of the proposed scheme are derived for independent Rayleigh fading channels,which demonstrates our theoretical analysis.Both analytical and simulation results are provided to show the superiority of our proposed scheme compared with existing works. | Jinjuan Ju Jinyuan Gu Guan Zhang | 2021 | China Communications2021,18,1: | 0 |
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