| 异步MIMO-OFDM中基于预处理矩阵的迭代检测算法 |
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| 引用本文： | 莫韬甫,邵士海,刘田,唐友喜.异步MIMO-OFDM中基于预处理矩阵的迭代检测算法[J].电子与信息学报,2012(4):795-801. |
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| 作者姓名： | 莫韬甫 邵士海 刘田 唐友喜 |
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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611731 |
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| 基金项目： | 国家自然科学基金(60902027,60832007,60901018,U1035002/L05,61001087,61101034);国家科技重大专项(2010ZX03003-002-01,2011ZX03001-006-01,2010ZX03007-003);和中央高校基金(ZYGX2010J012,ZYGX2009J008,ZYGX2009J010)资助课题 |
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| 摘 要： | 针对异步发射MIMO-OFDM链路,论文提出了一种基于预处理矩阵的迭代并行多天线干扰消除方法。该方法在信号发射前,通过预处理矩阵将信号扩展到所有子载波上,从而降低部分子载波深衰落对扩展前原始信号的影响。在接收端,上次迭代的判决错误在干扰重建时被预处理矩阵扩展,缓解了迭代干扰抵消过程中的误差传播。仿真结果表明,在4发2收场景下,误码率为10-3时,5次迭代后信噪比相比于传统的迭代并行多天线干扰消除方法改善约4.5 dB。
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| 关 键 词： | 无线通信 预处理矩阵 异步MIMO-OFDM 迭代 误码率 |
Pre-processing Matrix Based Iterative Detection Algorithm in Asynchronous MIMO-OFDM |
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| o Tao-fu,o Shi-hai,u Tian,ang You-xi.Pre-processing Matrix Based Iterative Detection Algorithm in Asynchronous MIMO-OFDM[J].Journal of Electronics & Information Technology,2012(4):795-801. |
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| Authors: | o Tao-fu o Shi-hai u Tian ang You-xi |
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| Affiliation: | (National Key Lab of Communication,University of Electronic Science and Technology of China,Chengdu 611731,China) |
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| Abstract: | In asynchronous MIMO-OFDM over the selective Rayleigh fading channel,an iterative parallel multiantenna interference cancellation algorithm based on pre-processing matrix is proposed.Before the signal is transmitted,the symbols are spread over all the subcarriers,which relieve the influence of deep fading in part of the subcarriers.In the receiver,the wrong decision value of last iteration is spread by the pre-processing matrix,which decrease the error propagation in iteration processing.The performance improvement is verified by simulation, when there are 4 transmitters 2 receivers and the Bit Error Rate(BER) is 3 10-,SNR is improved about 4.5 dB compared with the traditional iterative parallel interference cancellation algorithm. |
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| Keywords: | Wireless communication Pre-processing matrix Asynchronous MIMO-OFDM Iteration Bit Error Rate(BER) |
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