Nakagami-m信道衰落下的多时隙能量收集无线通信  

Multi-Slot Energy Harvesting Wireless Communication over Nakagami-m Channel Fading

作　　者：王明伟[1] 李慧贞[1] WANG Ming-wei;LI Hui-zhen(School of Electronic Information and Artificial Intelligence,Shaanxi University of Science&Technology,Xi'an 710021,China)

机构地区：[1]陕西科技大学电子信息与人工智能学院,西安710021

出　　处：《北京邮电大学学报》2020年第4期54-60,共7页Journal of Beijing University of Posts and Telecommunications

基　　金：陕西省科技厅科技攻关项目(2020NY-172,2020NY-023);陕西科技大学博士创新基金(2019BJ-03);陕西省咸阳市工业重点攻关项目(2019K02-17)。

摘　　要：由于无线信道存在衰落,射频能量收集(EH)器可将收集到的电磁波能量转化为用于无线通信的电源,其功率具有动态随机特性.为此,研究了Nakagami-m信道衰落下的多时隙"收集-存储-使用"能量收集方案的有效吞吐量以及"收集-使用"能量收集方案的二进制相干和非相干解调平均误比特率性能指标,推导出了精确的理论闭合公式.仿真结果表明,在Nakagami-m信道衰落的无线通信环境下,采用"收集-存储-使用"能量收集方案的无线通信存在最佳时隙数,以实现最大有效的吞吐量,而采用"收集-使用"的能量收集方案时,无线通信会使用少量时隙来平衡误码率和通信迟延.Due to the fading of the channel,the energy harvester converts the harvested electromagnetic wave energy into a power source for transmitting wireless signals again,and its power has random dynamic characteristics. Aiming at the wireless communication environment with Nakagami-m channel fading,linear radio frequency energy harvesters combining with multi-slot "harvest-storage-use"and "harvest-use"schemes to realize energy harvesting( EH) are proposed. The effective throughput of the "harvest-storage-use"EH scheme and the average bit error rate of binary digital coherent and incoherent demodulation of the "harvest-use"EH scheme are studied and analyzed. The simulation results show that the wireless communication adopting the "harvest-storage-use"strategy has the optimal number of time slots to achieve the best effective throughput,while the wireless communication adopting the "harvest-use"EH scheme should use a small number of time slots to balance the bit error rate and communication delay.

关 键 词：能量收集 Nakagami-m 有效吞吐量 误比特率 

分 类 号：TN912.6[电子电信—通信与信息系统]