超高速移动空 空宽带通信网及其物理层关键技术
Air to Air Wideband Network with Ultra High Node Velocity and Its Key Technology of Physical Layer

随着航空事业的迅速发 展和空中通信终端的日益增加，构建支持超高速移动的空中宽带通信网络已成为未来航空通 信和军事通信发展的迫切需求。本文首先简要概述航空通信网络现状和发展趋势，在此基础 上指出实现超高速移动空 空宽带通信网络所面临的支持超高速移动、支持高数据传输速率 、支持远距离单跳链接、支持大规模自组网和多用户访问机制等挑战性问题，并分析其相互 制约关系。最后重点讨论空 空宽带通信网物理层关键技术及其研究现状，包括调制技术、 正交频分复用的峰均功率比抑制、频偏估计、信道估计与信道建模等。
With the rapid development of aviation communications and the increasing num ber of airborne terminals, it is highly demanded to build up air to air wideband ad hoc networks supporting ultra high speed mobility both in civil and military avia tion systems . Here, the present situation and the developmen t t rend of aviation communication networks are briefly outlined. On the basis of it, the challenging issues of constructing such networks are presented, including the support of ultra high speed mobility, high data transmission rate, long distance single hop links, large scale Ad hoc networking, multiple user ac cess mechanism, as well as their restricted relationship. Finally, physical laye r key technologies and the related research progress for wideband airborne Ad ho c networks are reviewed, including modulation technology, peak to average power ratio suppression in OFDM, frequency offset estimation, channel estimation and c hannel modeling.