基于调制分集的MIMO DFT-S-OFDM系统  

MIMO DFT-S-OFDM system based on modulation diversity

作　　者：高翔[1] 吴湛击[1] 王文博[1] 

机构地区：[1]北京邮电大学泛网无线通信教育部重点实验室,北京100876

出　　处：《系统工程与电子技术》2012年第6期1235-1240,共6页Systems Engineering and Electronics

基　　金：国家重大科技专项(2009ZX03003-011-03);国家自然科学基金(61171101)资助课题

摘　　要：以离散傅里叶变换扩展正交频分复用(discrete Fourier transform spread orthogonal frequency divi-sion multiplexing,DFT-S-OFDM)技术为核心的单载波频分多址(single carrier frequency division multiple access,SC-FDMA)方案,已经成为第三代合作伙伴计划长期演进项目上行多址技术标准。提出了一种基于调制分集的多入多出(multiple input multiple output,MIMO)DFT-S-OFDM方案。该方案将调制分集和Turbo码相结合,有效利用时间分集和空间分集特性,在衰落信道下,既可以使系统具有较低误码性能,又可以获得较高的频谱效率。仿真结果表明,在最优旋转角度下,通过较小复杂度的增加,提出的系统与传统基于比特交织编码调制技术的MIMO DFT-S-OFDM系统相比,可获得明显的性能优势。The single carrier frequency division multiple access （SC-FDMA） scheme taking discrete Fourier transform spread orthogonal frequency division multiplexing （DFT-S-OFDM） as the core of technology has been adopted as the third generation partnership project-long term evolution standard for uplink transmission. In this paper, a novel MIMO DFT-S-OFDM system based on modulation diversity is proposed. Combining with effec- tive use of time diversity and space diversity, this proposed scheme joints the Turbo coding and modulation diversity together, and provides high-performance, high spectral efficiency and low error rate under the fading channel. The simulation results show that under the optimum rotation angle, the proposed scheme outperforms the conventional MIMO DFT-S-OFDM scheme based on bit-interleaved coded modulation with a little increase in complexity.

关 键 词：多输入多输出 离散傅里叶变换扩展正交频分多址 调制分集 最小均方误差检测 

分 类 号：TN929[电子电信—通信与信息系统]