| 直扩超宽带系统中基于线性约束恒模算法的多用户检测 |
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| 引用本文： | 刘家彬,冯兴乐,梁中华.直扩超宽带系统中基于线性约束恒模算法的多用户检测[J].北京石油化工学院学报,2009,17(4):1-7. |
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| 作者姓名： | 刘家彬 冯兴乐 梁中华 |
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| 作者单位： | 北京石油化工学院通信工程系,北京,102617;西安长安大学信息工程学院,西安,710064 |
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| 摘 要： | 针对超宽带室内传输环境的慢时变特性以及超宽带信号的恒模调制方式，提出了一种基于线性约束恒模算法的盲自适应多用户检测方案。该方案首次将恒模算法引入直扩超宽带系统中的多用户检测，应用盲信号处理方法推导了恒模算法在线性约束条件下的全局最优性。理论分析及仿真结果表明，与基于训练序列的自适应多用户检测相比，该方案提高了有效的信息传输容量，同时在输出信干比及误码性能方面的损失不超过3dB，有效地做到了传输容量与误码性能之间的折衷，适用于室内超宽带的多用户高速接入场合。
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| 关 键 词： | 超宽带(UWB) 多用户检测(MUD) 恒模算法(CMA) |
Linearly Constrained Constant Modulus Algorithm Based Multiuser Detection for DS-UWB Systems |
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| Liu Jiabin,Feng Xingle,Liang Zhonghua.Linearly Constrained Constant Modulus Algorithm Based Multiuser Detection for DS-UWB Systems[J].Journal of Beijing Institute of Petro-Chemical Technology,2009,17(4):1-7. |
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| Authors: | Liu Jiabin Feng Xingle Liang Zhonghua |
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| Affiliation: | Liu Jiabin~1 Feng Xingle~2 Liang Zhonghua~2 (1.Department of Communications Engineering,Beijing Institute of Petro-chemical Technology,Beijing 102617,China,2.School of Information Engineering,Chang\'an University,Xi\'an 710064,China) |
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| Abstract: | By exploiting the quasi-static or slowly time varying character for indoor ultra-wideband transmission environment and the constant-modulus modulation of ultra-wideband signals,a linearly constrained constant-modulus algorithm(LCCMA) based blind adaptive multiuser detection (MUD) scheme is presented for direct sequence ultra-wideband(DS-UWB) systems.In the proposed approach,the constant-modulus algorithm(CMA) is first introduced into the MUD for DS-UWB systems.Moreover,the global optimum property of the LCC... |
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| Keywords: | ultra-wideband(UWB) multiuser detection(MUD) constant-modulus algorithm(CMA) |
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