| SCM-OFDM系统在高速信道下的干扰抑制算法 |
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| 引用本文： | 彭涛,肖悦,李少谦.SCM-OFDM系统在高速信道下的干扰抑制算法[J].计算机工程与应用,2013(23):10-13,70. |
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| 作者姓名： | 彭涛 肖悦 李少谦 |
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| 作者单位： | 电子科技大学通信抗干扰国家级重点实验室,成都611731 |
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| 基金项目： | 国家自然科学基金（No.61101101）;北京邮电大学泛网无线通信教育部重点实验室（No.KFKT-2012102）;国家科技重大专项（No.2010ZX03006.002-02）;国家级科技重点实验室基金（No.9140C020404120C0201）;中央高校基本科研业务费专项资金. |
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| 摘 要： | 针对重叠码调制的正交频分复用（SCM-OFDM）系统在高速移动环境中，将产生复杂的载波间干扰和层间干扰问题，提出了一种用于SCM-OFDM系统在高速信道中的干扰估计和抵消算法。该算法利用译码器反馈的软信息，分别对载波间干扰和层间干扰进行估计和消除。仿真结果表明，提出的算法能够有效地改善SCM-OFDM系统在高速环境下的性能。
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| 关 键 词： | 正交频分复用 重叠码调制 高速信道 |
Interference compensation algorithm for SCM-OFDM systems in high speed channels |
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| PENG Tao,XIAO Yue,LI Shaoqian.Interference compensation algorithm for SCM-OFDM systems in high speed channels[J].Computer Engineering and Applications,2013(23):10-13,70. |
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| Authors: | PENG Tao XIAO Yue LI Shaoqian |
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| Affiliation: | (National Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China, Chengdu 611731, China) |
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| Abstract: | Superposition Coded Modulation-Orthogonal Frequency Division Multiplexing （SCM-OFDM）systems are prone to the problem of serious interference from multiple-layers and inter-carriers when mobile terminals are in a high speed environ- ment. To alleviate this problem, an interference estimation and cancellation algorithm is proposed for SCM-OFDM systems in high speed channels. In this algorithm, the Intercarrier Interference （ICI） and Multiple-Layer Interference （MLI） can be estimated and cancelled separately based on the soft information fed back from decoders. Simulation results show that the proposed algo- rithm can improve the performance of SCM-OFDM systems in the high speed movement. |
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| Keywords: | Orthogonal Frequency Division Multiplex（OFDM） Superposition Coded Modulation（SCM） high speed channels |
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