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低空无线信道建模及其均衡技术研究进展
陈强,杨霄鹏,杨栋,倪娟
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(空军工程大学电讯工程学院，西安 710077)

摘要:

在介绍航空信道建模基础上，借鉴地面移动信道研究成果，分析了描述低空无线信道特性的常用参数，对不同场景下低空信道的多径时延、多普勒频移等传输特性作了详细介绍，给出了低空信道建模的一般模型。介绍了低空无线信道常用的LMS、RLS、CMA 三种信道均衡算法。最后,对低空无线信道建模研究以及适合低空信道的均衡算法进行展望，指出在改进现有均衡算法、编码和均衡相结合、最大多普勒估计和自适应均衡相结合等方面是值得关注的研究内容。

关键词: 低空空域航空通信信道模型均衡技术

DOI：

基金项目:陕西省电子信息系统综合集成重点实验室基金资助（201104Y06）

Research progress of low-altitude wireless channel modeling and equalization techniques

CHEN Qiang,YANG Xiao-peng,YANG Dong,NI Juan

()

Abstract:

The air chann el modeling is introduced based on ground mobile channel and commonly used paramet ers for describing lowaltitude wireless channel characteristics are analysed.T he lowaltitude multipath delay and Doppler frequency shift transmission characteristics in different scenes are described and the general model of low-altitude channel modeling is given.The commonly used three channel equ alization algorithms(LMS,RLS and CMA) for low-altitude radio channel are pres ented. Finally, the low-altitude wireless channel modeling and channel equalization algorithms are expected.It is po inted out the improvement of existing equalization algorithms, coding and equal ization combination, the maximum Doppler estimation and adaptive equalization co mbination should be focused.

Key words: low altitude airspace aviation communication channel model equalization techniq ue