联合光束形成和传输功率控制,以最大限度地提高活动的IRS辅助ISAC系统的通讯速度
1School of Electrical Engineering, Northeast Electric Power University, Jilin, 132012, China. wangjihong@neepu.edu.cn.
Scientific reports
|August 27, 2025
概括
本研究介绍了主动智能反射表面 (IRS) 辅助的综合传感和通信 (ISAC) 系统的新策略,以最大限度地提高上链通信速度. 与现有策略相比,拟议的方法显著提高了用户上传通讯率.
科学领域:
- 无线通信系统
- 信号处理
- 信息理论
背景情况:
- 目前关于主动智能反射表面 (IRS) 辅助的综合传感和通信 (ISAC) 的研究主要集中在下行传感优化上.
- 在复杂场景中使用主动IRS来增强传感约束下的上行通信性能存在研究缺口.
研究的目的:
- 为活跃的IRS辅助上链ISAC系统构建和解决上链通信速度最大化问题.
- 为高度非凸的优化问题制定联合光束形成和传输功率控制策略.
- 调查基站发射功率对通信性能的影响.
主要方法:
- 上链通信速度最大化问题的制定.
- 应用拉格朗的双变换和分数编程来简化目标函数.
- 使用交替优化,最大化-最小化和半定义放松算法的代优化.
主要成果:
- 拟议的联合光束形成和传输功率控制策略显著提高了用户上线通信速度.
- 实现了27.3% (与被动IRS相比),9.5% (与随机策略1) 和11.4% (与随机策略2) 的增强比率.
- 分析表明,在固定功率预算下,增加基站最大传输功率可能会对通信性能产生负面影响.
结论:
- 拟议的战略有效地提高了IRS协助的ISAC系统的上升通讯率.
- 开发的优化技术成功地解决了问题中的非凸度和合问题.
- 仔细考虑基站传输功率对于优化这些系统的通信性能至关重要.
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