强激光与粒子束, 2016, 28 (6): 064128, 网络出版: 2016-04-12
纳米网络中的太赫兹波大气传输和信道分析
太赫兹 大气传输 吸收衰减 太赫兹时域光谱 纳米网络 最大传输数据率 terahertz atmospheric propagation absorption attenuation terahertz time-domain spectroscopy nanonetworks maximum transmittable data rate
摘要
利用太赫兹大气传输衰减模型, 比对太赫兹时域光谱系统的实验结果, 结合最新的HITRAN数据库, 发展了一个适用于纳米尺度的太赫兹信道分析模型。提出了一个0.1~5 THz宽的信道, 分析了此信道在纳米尺度的传输损耗和最大传输数据率。研究结果表明, 在纳米尺度0.1~5 THz宽的信道的传输数据率达几百Gbit/s, 随着天线增益等硬件性能的不断提升, 信道的最大传输数据率将达Tbit/s, 此研究对于纳米器件之间的快速、大数据量的信息共享具有重要的参考价值。
Abstract
Terahertz (THz) communications are expected to be the next frontier for wireless nanonetworks. Nanonetworks are formed by nanodevices (tiny devices at the nanoscale or molecular scale). The high transmittable data rate for nanonetwork is investigated based on a new model of the THz wave atmospheric propagation of attenuation. The THz wave atmospheric attenuation experimental results obtained from the THz-time domain spectroscopy (THz-TDS) technique are analyzed using this model. The intensity and location of the observed absorption lines are in good agreement with the calculated spectrum. The total path loss and the maximum transmittable data rate are numerically simulated when a THz wave propagates over an extremely short distance. Furthermore, the channel capacity in the THz band (0.1-5 THz) is investigated by this mode. It is shown that the molecular absorption loss is significant in THz band; data with high rates of more than 100 Gbit/s, which take advantage of the unique characteristics in the physical channels while minimizing the impairments of molecular absorption, can be transmitted via the THz channels for a greatly short transmission distance.
王玉文, 董志伟, 李瀚宇, 周逊. 纳米网络中的太赫兹波大气传输和信道分析[J]. 强激光与粒子束, 2016, 28(6): 064128. Wang Yuwen, Dong Zhiwei, Li Hanyu, Zhou Xun. [J]. High Power Laser and Particle Beams, 2016, 28(6): 064128.