在未来6G物联网(Internet of Things,IoT)系统中,高频毫米波和太赫兹频谱等关键技术的广泛应用,使近场无线传输成为愈发普遍的应用场景。动态超表面天线(Dynamic Metasurface Antenna,DMA)等小尺寸天线阵列在传输效率、物理尺寸和功耗...在未来6G物联网(Internet of Things,IoT)系统中,高频毫米波和太赫兹频谱等关键技术的广泛应用,使近场无线传输成为愈发普遍的应用场景。动态超表面天线(Dynamic Metasurface Antenna,DMA)等小尺寸天线阵列在传输效率、物理尺寸和功耗方面具备优势,在该场景中被广泛应用,相关研究的关注度日益提升。为提升近场无线传输中接收端的能量性能,提出一种基于DMA的下行近场无线数能同传(Simultaneous Wireless Information and Power Transfer,SWIPT)系统,在满足所有信息用户最低传输速率需求的条件下,针对该优化问题提出联合优化DMA可调频响矩阵与数字预编码向量的高效解决方案。此外,深入探讨了用户间距离及最小信干噪比(Signal to Interference plus Noise Ratio,SINR)等因素对于系统性能的影响。仿真结果表明,提出的方案相比其他现有技术能有效提升SWIPT联合性能。展开更多
In this paper,we study the orthogonal time frequency space signal transmission over multi-path channel in the presence of phase noise(PHN)at both sides of millimeter wave(mmWave)communication links.The statistics char...In this paper,we study the orthogonal time frequency space signal transmission over multi-path channel in the presence of phase noise(PHN)at both sides of millimeter wave(mmWave)communication links.The statistics characteristics of the PHN-induced common phase error and inter-Doppler interference are investigated.Then,a column-shaped pilot structure is designed,and training pilots are used to realize linear-complexity PHN tracking and compensation.Numerical results demonstrate that the proposed scheme enables the signal to noise ratio loss to be restrained within 1 dB in contrast to the no PHN case.展开更多
文摘在未来6G物联网(Internet of Things,IoT)系统中,高频毫米波和太赫兹频谱等关键技术的广泛应用,使近场无线传输成为愈发普遍的应用场景。动态超表面天线(Dynamic Metasurface Antenna,DMA)等小尺寸天线阵列在传输效率、物理尺寸和功耗方面具备优势,在该场景中被广泛应用,相关研究的关注度日益提升。为提升近场无线传输中接收端的能量性能,提出一种基于DMA的下行近场无线数能同传(Simultaneous Wireless Information and Power Transfer,SWIPT)系统,在满足所有信息用户最低传输速率需求的条件下,针对该优化问题提出联合优化DMA可调频响矩阵与数字预编码向量的高效解决方案。此外,深入探讨了用户间距离及最小信干噪比(Signal to Interference plus Noise Ratio,SINR)等因素对于系统性能的影响。仿真结果表明,提出的方案相比其他现有技术能有效提升SWIPT联合性能。
基金supported by the National Natural Science Foundation of China(62071097)the Sichuan Science and Technology Program(2023NSFSC0458).
文摘In this paper,we study the orthogonal time frequency space signal transmission over multi-path channel in the presence of phase noise(PHN)at both sides of millimeter wave(mmWave)communication links.The statistics characteristics of the PHN-induced common phase error and inter-Doppler interference are investigated.Then,a column-shaped pilot structure is designed,and training pilots are used to realize linear-complexity PHN tracking and compensation.Numerical results demonstrate that the proposed scheme enables the signal to noise ratio loss to be restrained within 1 dB in contrast to the no PHN case.
