空军工程大学学报（自然科学版）Issue(1)：53-56,4.DOI:10.3969/j.issn.1009-3516.2014.01.012
对流层散射信道下多天线分集OFDM系统研究
An Analysis of OFDM System under Troposcatter Fading with Multi-antenna Diversity
摘要
Abstract
The application of OFDM in troposcatter communication can enlarge the tropo communication ca-pacity.Meanwhile,Inter Carrier Interference (ICI)of OFDM system is the major drawback to degrade OFDM system performance.As a result,the multi-antenna diversity techniques are introduced and the OFDM with Maximal Ratio Combining (MRC)diversity under tropo fading channel is investigated.First-ly,the tropo channel model is established,then,system ICI is investigated.OFDM system with MRC di-versity under tropo channel is investigated,and the system SER is derived.Simulation results show that ICI can degrade the SER performance and introduce symbol error floor while multi-antenna diversity can solve the problem above.When normalized Doppler spread equals 0.02 and signal to noise ratio equals 20dB,dual diversity can decrease SER by two orders of magnitude and triplex diversity with four orders of magnitude.关键词
对流层散射/正交频分复用/子载波间干扰/多天线分集/误码率Key words
troposcatter/OFDM/inter-carrier interference/multi-antenna diversity/SER分类
电子信息工程引用本文复制引用
陈西宏,胡茂凯,薛伦生,张群..对流层散射信道下多天线分集OFDM系统研究[J].空军工程大学学报（自然科学版）,2014,(1):53-56,4.基金项目
国家自然科学基金资助项目(60971100) （60971100）
