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

作　　者：尚应博 赵悠悠 穆晓敏[1] 张建康[1,2] Shang Yingbo;Zhao Youyou;Mu Xiaomin;Zhang Jiankang(School of Information Engineering, Zhengzhou University, Zhengzhou 450001, China;National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China)

机构地区：[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

出　　处：《计算机应用研究》2019年第7期2108-2111,共4页Application Research of Computers

基　　金：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)

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。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 computatio- nal 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.

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 

分 类 号：TN929.5[电子电信—通信与信息系统]