Intelligent reflecting surface(IRS)is a newly emerged and promising paradigm to substantially improve the performance of wireless communications by constructing favorable communication channels via properly tuning mas...Intelligent reflecting surface(IRS)is a newly emerged and promising paradigm to substantially improve the performance of wireless communications by constructing favorable communication channels via properly tuning massive reflecting elements.This paper considers a distributed IRS aided decode-and-forward(DF)relaying system over Nakagami-m fading channels.Based on a tight approximation for the distribution of the received signalto-noise ratio(SNR),we first derive exact closed-form expressions of the outage probability,ergodic capacity,and energy efficiency for the considered system.Moreover,we propose the optimal IRS configuration considering the energy efficiency and pilot overhead.Finally,we compare the performance between the distributed IRS-aided DF relaying and multi-IRS-only systems,and verify the analytical results by using monte carlo simulations.展开更多
县域是我国资源禀赋最丰富的区域,也是新型城镇化和农业现代化的耦合点。在推进碳达峰碳中和的过程中,县域的生态功能举足轻重。县域兴衰关系着我国发展全局,推动县域经济高质量发展是时代赋予的使命。本文以某县为研究区,利用长期能源...县域是我国资源禀赋最丰富的区域,也是新型城镇化和农业现代化的耦合点。在推进碳达峰碳中和的过程中,县域的生态功能举足轻重。县域兴衰关系着我国发展全局,推动县域经济高质量发展是时代赋予的使命。本文以某县为研究区,利用长期能源替代规划系统(Long-range Energy Alternatives Planning system,LEAP)构建适用于县域的碳达峰预测模型,分析县域碳达峰情景,对重点领域进行碳达峰预测。未来,县域要因地制宜,多措并举,以高质量发展推进碳达峰碳中和,以降碳为抓手,实现绿色低碳发展。展开更多
文摘Intelligent reflecting surface(IRS)is a newly emerged and promising paradigm to substantially improve the performance of wireless communications by constructing favorable communication channels via properly tuning massive reflecting elements.This paper considers a distributed IRS aided decode-and-forward(DF)relaying system over Nakagami-m fading channels.Based on a tight approximation for the distribution of the received signalto-noise ratio(SNR),we first derive exact closed-form expressions of the outage probability,ergodic capacity,and energy efficiency for the considered system.Moreover,we propose the optimal IRS configuration considering the energy efficiency and pilot overhead.Finally,we compare the performance between the distributed IRS-aided DF relaying and multi-IRS-only systems,and verify the analytical results by using monte carlo simulations.
文摘县域是我国资源禀赋最丰富的区域,也是新型城镇化和农业现代化的耦合点。在推进碳达峰碳中和的过程中,县域的生态功能举足轻重。县域兴衰关系着我国发展全局,推动县域经济高质量发展是时代赋予的使命。本文以某县为研究区,利用长期能源替代规划系统(Long-range Energy Alternatives Planning system,LEAP)构建适用于县域的碳达峰预测模型,分析县域碳达峰情景,对重点领域进行碳达峰预测。未来,县域要因地制宜,多措并举,以高质量发展推进碳达峰碳中和,以降碳为抓手,实现绿色低碳发展。