《计算机应用研究》|Application Research of Computers

基于GMD-DPC/THP的两组Alamouti非线性预编码系统

Two-group Alamouti nonlinear precoding system based on GMD-DPC / THP

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作者 尚应博,赵悠悠,穆晓敏,张建康
机构 1.郑州大学 信息工程学院,郑州 450001;2.东南大学 移动通信国家重点实验室,南京 210096
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文章编号 1001-3695(2019)07-022-2108-04
DOI 10.19734/j.issn.1001-3695.2018.01.0048
摘要 针对Alamouti空时块编码复用增益损失的问题,提出了两组Alamouti编码方案。在此基础上,为了改善系统的误码率(BER)性能和简化接收端复杂度,提出了将几何均值分解(GMD)算法和非线性预编码技术相结合的两组Alamouti传输方案。该方案的设计方法为:首先等效出两组Alamouti空时块编码系统的信道矩阵;进而,通过GMD算法对等效信道矩阵进行收发端联合设计;最后,在发射端应用脏纸(dirty paper coding,DPC)和Tomlinson-Harashima precoding(THP)非线性预编码技术,消除发送信号间的干扰,从而使系统获得更好的误码率性能。通过仿真结果对比发现,提出的系统可以显著地改善误码率性能。
关键词 空时块编码; 非线性预编码; 几何均值分解; 脏纸编码; 等效信道
基金项目 国家自然科学基金面上资助项目(NSFC61571401)
东南大学移动通信国家重点实验室开放研究基金(2016D02)
河南省高校科技创新人才资助项目(18HASTIT021)
河南省高等学校青年骨干教师资助项目(2015GGJS-154)
本文URL http://www.arocmag.com/article/01-2019-07-041.html
英文标题 Two-group Alamouti nonlinear precoding system based on GMD-DPC / THP
作者英文名 Shang Yingbo, Zhao Youyou, Mu Xiaomin, Zhang Jiankang
机构英文名 1.School of Information Engineering,Zhengzhou University,Zhengzhou 450001,China;2.National Mobile Communications Research Laboratory,Southeast University,Nanjing 210096,China
英文摘要 In order to solve the problem of multiplexing gain loss in Alamouti space-time block coding, this paper proposed a two-group Alamouti transmission scheme. On this basis, in order to improve the bit error ratio(BER) with lower computational complexity at the receiver, this paper proposed a two-group Alamouti transmission scheme by combining GMD algorithm and non-linear precoding technique. The design method of the proposed solution consists of three main operations. Firstly, it obtained the effective channel matrix of two-group Alamouti transmission systems. Secondly, it jointly designed the transceiver with the obtained effective channel matrix by exploiting the GMD algorithm. Finally, it mitigated the inter-channel interference by utilizing non-linear precoding techniques of DPC and Tomlinson-Harashima Precoding(THP). The simulation results demonstrate that the proposed scheme is capable of significantly improving the achievable BER performance.
英文关键词 space-time block coding; nonlinear precoding; GMD(geometric mean decomposition); DPCC(dirty paper coding); equivalent channel
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收稿日期 2018/1/31
修回日期 2018/3/23
页码 2108-2111
中图分类号 TN929.5
文献标志码 A