在可重新配置的智能表面辅助通信系统中,低复杂度的光束成形设计
Jun Jiang1,2,3, Huan Huang4,5, Junxin Zhang1,2
1College of Information Science and Technology, Tibet University, Lhasa, 850000, China.
Scientific reports
|June 11, 2024
概括
可重新配置的智能表面 (RIS) 通过克服阻塞来提高无线通信质量. 本研究介绍了一种低复杂度的束形设计,以提高RIS辅助系统容量,以更少的计算资源提高性能.
科学领域:
- 无线通信系统无线通信系统
- 信号处理 信号处理
- 优化算法 优化算法
背景情况:
- 无线通信质量受到信号阻塞的影响.
- 可重新配置的智能表面 (RIS) 提供了一种改善信号完整性的解决方案.
- 在RIS辅助系统中优化beamforming对于容量至关重要,但在计算上是复杂的.
研究的目的:
- 为RIS辅助的无线通信系统开发一个低复杂度的联合优化束形设计.
- 提高这些系统的容量和性能.
- 为了解决与不断增加的系统规模相关的计算复杂性挑战.
主要方法:
- 提出了基于分数编程 (FP) 的联合束形设计.
- 将非凸的总和率最大化问题分解成三个辅助变量子问题.
- 用于主动和被动光束成型的衍生闭式解决方案.
- 使用伍德伯里和标量变换来降低计算复杂性.
- 扩展了算法来处理道状态信息错误.
主要成果:
- 实现了用于梁成型的最佳封闭式解决方案.
- 与传统方法相比,显著降低了计算复杂性.
- 证明了算法的有效性,即使有道状态信息错误.
- 模拟结果表明性能优势超过现有算法.
结论:
- 拟议的基于分数编程的低复杂度束形设计有效地增强了RIS辅助的无线通信系统.
- 该方法提供了一个实际的解决方案,用于增加系统容量,同时管理计算需求.
- 该算法在各种场景中显示出稳定性和卓越性能,包括那些有不完美的通道信息的场景.
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