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适用于快速衰落环境下的差分OFDM系统

Differential OFDM System under Fast Fading Environment
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摘要 为提高正交频分复用(OFDM)系统在快速衰落环境下的性能,提出了基于自消除子载波间干扰(ICI)的频域差分0FDM系统。发送端采用相邻子信道插零分配子载波,接收端通过符号旋转抵消抑制ICI。该系统在快速时变的信道和较大ICI情况下,既保证通信质量又降低了系统实现复杂度。分析和仿真结果表明:提出的方案与迭代消除ICI方案相比,可在频谱效率一样的前提下,以较低复杂度获得更低误码率。 In order to improve the performance of orthogonal frequency division multiplexing (OFDM)system under the fast fading channel,a frequency domain differential OFDM system based on inter-carriers interference (ICI)cancellation was proposed.At the sending terminal,the allocation of sub-carriers by inserting zero in adjacent sub-channels,and at the receiv-ing end,ICI interference was cancelled by rotating the receiver symbol in the system.In the fast fading channel and big ICI, the quality of communication can be ensured by the system proposed,with reduced complexity.Simulation results show that the proposed scheme achieves lower BER than iterative ICI cancellation scheme under the same spectrum efficiency con-straint.It is also proved that the proposed scheme has lower complexity than iterative ICI cancellation scheme.
出处 《世界科技研究与发展》 CSCD 2014年第4期384-387,共4页 World Sci-Tech R&D
基金 国家自然科学基金(60872038) 重庆市电力公司科技项目(2013渝电科技自88#) 重庆市自然科学基金重点(CSTC2013jjB40004)资助
关键词 正交频分复用 子载波间干扰 频域差分 符号旋转 frequency domain differential inter-carriers interference rotating the receiver symbol orthogonal frequency divi-sion multiplexing
作者简介 吴维农(1965-),男,高级工程师,主要研究方向:无线通信系统理论与应用; 胡真(1989-),女,硕士研究生,主要研究方向:无线通信技术; 卓灵(1985-),女,工程师,主要研究方向:无线通信技术; E-mail:wuyucheng@cqu.edu.cn吴玉成(1971-),男,博士,教授,主要研究方向:无线通信技术、宽带无线接人; 田博今(1985-),男,工程师,主要研究方向:电子测量技术; 李建红(1970-),男,工程师,主要研究方向:计算机信息技术。
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