| MIMO-OFDM系统Turbo接收机中的限幅非线性失真迭代对消法 |
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| 引用本文： | 雷霞,赵颖,唐友喜,李少谦.MIMO-OFDM系统Turbo接收机中的限幅非线性失真迭代对消法[J].信号处理,2006,22(6):800-804. |
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| 作者姓名： | 雷霞 赵颖 唐友喜 李少谦 |
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| 作者单位： | 电子科技大学通信抗干扰技术国家级重点实验室,成都,610054 |
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| 基金项目： | 国家高技术研究发展计划(863计划);国家自然科学基金;高等学校博士学科点专项科研项目 |
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| 摘 要： | 在多入多出的正交频分复用系统中,常采用Turbo接收以保证系统性能。在正交频分复用系统中,限幅技术是常见的峰值平均功率比抑制技术,但限幅带来的非线性失真会造成带内失真和带外辐射,从而恶化系统性能。本文提出可以利用Turho接收机的先验信息进行限幅非线性失真的迭代对消,从而在引入少量复杂度的基础上,对抗限幅带来的影响。仿真结果表明,引入限幅非线性失真迭代对消算法可以有效提高系统性能,限幅门限越低效果越明显。
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| 关 键 词： | 多入多出系统 正交频分复用 Turbo接收机 峰值平均功率比 限幅 |
| 修稿时间： | 2005年2月1日 |
Iterative Estimation and Cancellation of Clipping Distortion by Turbo Receiver for MIMO-OFDM |
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| Lei Xia,ZhaoYing,Tang Youxi,Li Shaoqian.Iterative Estimation and Cancellation of Clipping Distortion by Turbo Receiver for MIMO-OFDM[J].Signal Processing,2006,22(6):800-804. |
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| Authors: | Lei Xia ZhaoYing Tang Youxi Li Shaoqian |
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| Abstract: | Multiple-input-multiple-output (MIMO) - orthogonal-frequency-division-multiplex (OFDM) system can provide wider covering area, higher data transmission speed and frequency efficiency. Turbo receiver is always applied due to the influence of the co-channel interference. Although clipping can control the high peak-to-average power ratio effectively, the non-linear distortion caused by clipping will decrease the performance. The authors apply iterative estimation and cancellation of clipping noise scheme into Turbo receiver to reduce clipping influences and improve system performance effectually with only less system complexity increase. It is shown by simulation results that system performance can be improved about 1 dB, and the performance will be better with the lower clipping threshold. |
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| Keywords: | Multiple-Input-Multiple-Output(MIMO) Orthogonal Frequency Division Multiplexing( OFDM) Turbo Receiver Peak-to-Average Power Ratio(PAPR) clipping |
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