| 无循环前缀SFBC-OFDM系统的Turbo均衡 |
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| 引用本文： | 陈哲,常永宇,杨大成. 无循环前缀SFBC-OFDM系统的Turbo均衡[J]. 北京邮电大学学报, 2009, 32(6): 62-66 |
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| 作者姓名： | 陈哲 常永宇 杨大成 |
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| 作者单位： | 北京邮电大学,信息与通信工程学院,北京,100876 |
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| 摘 要： | 为了提高传输效率，对无循环前缀(CP)的空频分组码正交频分复用(SFBC-OFDM)系统进行了研究，提出一种基于软信息反馈的Turbo均衡算法. 同时提出了符号间干扰删除、软循环重构、对角化SFBC译码以及MMSE频域均衡器，通过多次迭代抑制系统中出现的各种干扰. 仿真结果表明，该算法可有效改善无CP的SFBC-OFDM的误码性能.
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| 关 键 词： | 正交频分复用 Turbo均衡 空频分组码 |
| 收稿时间： | 2009-03-26 |
| 修稿时间： | 2009-09-10 |
Turbo Equalization for SFBC-OFDM Systems without CP |
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| CHEN Zhe,CHANG Yong-yu,YANG Da-cheng. Turbo Equalization for SFBC-OFDM Systems without CP[J]. Journal of Beijing University of Posts and Telecommunications, 2009, 32(6): 62-66 |
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| Authors: | CHEN Zhe CHANG Yong-yu YANG Da-cheng |
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| Affiliation: | (School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China) |
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| Abstract: | To increase transmission efficiency, a soft-information-based Turbo equalization algorithm is proposed for the space-frequency block code orthogonal frequency-division multiplexing (SFBC-OFDM) system without cyclic prefix (CP). In our algorithm, processing modules as inter-symbol interference cancellation, soft cyclic reconstruction, diagonalized SFBC decoder and minimum mean square error frequency domain equalizer are proposed to work in an iterative way to suppress interferences. Simulation results show that this algorithm can improve the bit error rate performance of SFBC-OFDM system without CP. |
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| Keywords: | orthogonal frequency-division multiplexing Turbo equalization space-frequency block code |
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