对流层散射衰落信道下正交频分复用系统性能

吉林大学学报(工学版) ›› 2013, Vol. 43 ›› Issue (01): 239-243.

对流层散射衰落信道下正交频分复用系统性能

胡茂凯¹, 孙际哲¹, 陈西宏¹, 张群²

1. 空军工程大学防空反导学院, 西安710051;
2. 空军工程大学信息与导航学院, 西安 710077

收稿日期:2011-11-28 出版日期:2013-01-01 发布日期:2013-01-01
作者简介:胡茂凯(1985-),男,博士研究生.研究方向:战术导弹通信对抗技术.E-mail:tgyxhmk@163.com
基金资助:
国家自然科学基金项目(60971100).

Performance of OFDM system under troposcatter fading channels

HU Mao-kai¹, SUN Ji-zhe¹, CHEN Xi-hong¹, ZHANG Qun²

1. School of Air and Missile Defense, Air Force Engineering University, Xi'an 710051, China;
2. School of Information and Navigation, Air Force Engineering University, Xi'an 710077, China

Received:2011-11-28 Online:2013-01-01 Published:2013-01-01

摘要/Abstract

摘要： 为克服大容量散射通信系统中多径衰落特性导致的通信容量限制问题,将正交频分复用(OFDM)技术引入散射通信用来降低高速率通信带来的符号间干扰(ISI)。建立了对流层散射信道模型,从理论上对经历散射衰落信道的OFDM系统接收信号分量进行分析与计算,推导了系统的误码率,并进行了仿真验证。为了提高系统可靠性,研究了采用Reed-Solomon编码的COFDM调制方案。仿真结果表明OFDM调制方案可以有效提升散射通信容量,基于编码技术的OFDM调制方案可以满足未来军事通信需求。

关键词: 通信技术, 散射衰落信道, 正交频分复用, 符号间干扰, 误码率

Abstract: As the transmission bit rate is limited for the multipath fading effect in troposcatter communication, Orthogonal frequency division multiplexing (OFDM) technique is introduced to eliminate the Inter-Symbol Interference (ISI) in high transmission system. First, the troposcatter multipath fading channel is modeled. Then, the performance of OFDM signal over tropo channel is analyzed theoretically, and the components of the received signal are investigated. Finally, the Symbol Error Rate (SER) of the considered system is achieved. To improve the SER performance, the Reed-Solomon coding technique is adopted. Simulation results show that high transmission rate is possible as the OFDM scheme is employed in troposcatter communication. With the coding technique, the SER performance of the OFDM scheme over tropo channel meets well with military communication requirements at high transmission rate.

Key words: communication, troposcatter fading channels, orthogonal frequency division multiplexing (OFDM), inter-symbol interference, symbol error rate

中图分类号:

TN911.6

胡茂凯, 孙际哲, 陈西宏, 张群. 对流层散射衰落信道下正交频分复用系统性能[J]. 吉林大学学报(工学版), 2013, 43(01): 239-243.

HU Mao-kai, SUN Ji-zhe, CHEN Xi-hong, ZHANG Qun. Performance of OFDM system under troposcatter fading channels[J]. 吉林大学学报(工学版), 2013, 43(01): 239-243.

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