一种宽带地空通信系统组网方案  

A Networking Scheme of Wideband Ground-Air Communication System

作　　者：费满锋[1,2] 易克初[1] 

机构地区：[1]西安电子科技大学综合业务网国家重点实验室,陕西西安710071 [2]中国电子科技集团公司第五十四研究所,河北石家庄050081

出　　处：《电子学报》2010年第1期87-91,共5页Acta Electronica Sinica

基　　金：国家自然科学基金(No.60572148)

摘　　要：针对低仰角宽带地空通信中信道多径时延较大和快速时变的特点,提出了一种多址方式新颖的星型网组网方案.其内向链路采用基于Golay互补序列的异步码分多址方式,其外向链路采用基于Walsh序列的M元扩频码分复用技术,内向链路抗多址干扰能力很强,两种链路的接收端都因结合了滤波器组频域均衡技术(FB-FDE)因而具有很强的抗多径衰落能力,并具有频带效率高,结构简单等优点.这种多址接入方式和组网方案很适合于低仰角下宽带地空通信信道环境中的应用,其主要性能得到仿真验证,具有很好的应用前景.Aiming at the characteristics of large multipath delay and fast channel variation in wideband ground-air communications with low elevation,a networking scheme of star-shape topology based on a novel multi-access mode is proposed.Its inbound link is an asynchronous CDMA mode based on Golay complementary sequences,while its outbound link uses code division multiplexing based on Walsh sequences M-ary spectrum spreading.The inbound link has very strong ability of anti-multi-access-interference,and the both links have very strong ability of anti-multi-path-fading since they employ filter-banks for frequency equalization（FB-FDE） in their receiving terminals,moreover they have the characteristics of high frequency efficiency and low complexity in implementation.The multi-access mode and networking scheme is quite suitable for the channel condition of wideband ground-air communication system with low elevation.The main performance of the system has verified by simulation experiments,and the results show that it is promising in practical applications.

关 键 词：滤波器组 频域均衡 宽带地空通信 正交码分复用 码分多址 

分 类 号：TN911.72[电子电信—通信与信息系统]