基于几何均值分解的多用户MIMO系统预编码设计
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摘要
提出了一种联合收发器设计,结合了几何均值分解和THP预编码方案,将多用户MIMO广播信道分解为多个相同信噪比的并行子信道。通过发射机中的联合THP编码和接收机中的线性均衡,每个用户可以对所有子信道中的数据流使用相同的码本,同时基站可以根据用户的最佳排序通知用户使用哪个码本。与传统的THP方案相比,可以更好地实现BER性能。理论分析和数值模拟均验证了这个方案。
An joint transceiver design that combines the geometric mean decomposition(GMD) with Tomlinson-Harashima precoding(THP) scheme was proposed. The scheme decomposes a multiuser MIMO broadcast channel into multiple identical parallel signal-to-noise ratio(SNR) subchannels for each user. Joint THP at transmitter and linear equalization in each of the receivers, each user could use same codebook for all streams in all his subchannels, and the base station could inform each user which codebook to use depending on the optimal ordering of all the users. Compared to traditional THP scheme, The approaches can achieve better BER performance. Both theoretical analyses and numerical simulations validated the scheme.
An joint transceiver design that combines the geometric mean decomposition(GMD) with Tomlinson-Harashima precoding(THP) scheme was proposed. The scheme decomposes a multiuser MIMO broadcast channel into multiple identical parallel signal-to-noise ratio(SNR) subchannels for each user. Joint THP at transmitter and linear equalization in each of the receivers, each user could use same codebook for all streams in all his subchannels, and the base station could inform each user which codebook to use depending on the optimal ordering of all the users. Compared to traditional THP scheme, The approaches can achieve better BER performance. Both theoretical analyses and numerical simulations validated the scheme.
引文
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[7]LINSW,HOWL,LIANGYC,Block-diagonalgeometricmean decomposition(BD-GMD)formultiuserMIMObroadcastchannels[C]//IEEE 17th Int. Symp. Pers., Indoor, Mobile Radio Commun,2006:1-5.
[2]COSTA M. Writing on dirty paper[J]. IEEE Trans Inform Theory, 1983.29(3):439-441.
[3]JINDALN.MIMObroadcastchannelswithfinite-ratefeedback[J].IEEE Trans on Inform. Theory, 2006, 52(11):5045-5060.
[4]WANGD,JORSWIECKEA,SEZGINA,etal.JointTomlinson-Harashima precoding with diversity techniques for multiuser MIMO systems[C]. International Conf on Vehicular Tech, 2005:1017-1021.
[5]JIANGY,LIJ,HAGERWW.JointtransceiverdesignforMIMO communications using geometric mean decomposition[J]. IEEE Trans Signal Processing, 2005, 53(10):3791-3803.
[6]许道峰,黄永明,杨绿溪等.多用户MIMO系统TH预编码[J]电子与信息学报2009XUDF,HUANGYM,YANGLX,etal.Tomlinson-harashima pre-coding for multiuser mimo systems[J] Journal of Electronics&In-formation Technology 2009. 31(3):657-660
[7]LINSW,HOWL,LIANGYC,Block-diagonalgeometricmean decomposition(BD-GMD)formultiuserMIMObroadcastchannels[C]//IEEE 17th Int. Symp. Pers., Indoor, Mobile Radio Commun,2006:1-5.