基于部分连接结构的低复杂度混合多用户预编码算法  

Low Complexity Hybrid Multiuser Precoding Algorithm Based on Partially Connected Structure

作　　者：张新[1] 张柳伟 张秀[1] ZHANG Xin;ZHANG Liuwei;ZHANG Xiu(Tianjin Key Laboratory of Wireless Mobile Communications and Power Transmission,College of Electronic and Communication Engineering,Tianjin Normal University,Tianjin 300387,China)

机构地区：[1]天津师范大学天津市无线移动通信与无线电能传输重点实验室,天津300387

出　　处：《移动通信》2023年第8期79-85,共7页Mobile Communications

摘　　要：为了解决大规模多输入多输出混合预编码系统功耗大、算法复杂度高、频效低等问题,针对传统混合预编码部分连接结构系统,提出了一种基于部分连接结构的新的低复杂度混合预编码算法,所提方案可暂时获得模拟域闭合解降低复杂性。不考虑用户之间的干扰,基于奇异值分解和最小均方误差准则设计用户的模拟域预编码。基于块对角化预编码方法,利用得到的模拟等效信道获得数字域预编码,并基于注水算法对发射功率进行分配,进一步提高通信质量。仿真结果表明,所提算法在频效和能效方面优于传统算法,且在不完美信道条件下,仍能获得令人满意的性能。To solve the problems of massive MIMO hybrid precoding system with high power consumption, high algorithm complexity and low spectral efficiency, a novel low complexity hybrid precoding algorithm is proposed based on partially connected structure for the traditional hybrid precoding system. The proposed scheme can temporarily obtain the closed solution of the analog domain to reduce the complexity. Without considering the interference between users, the analog domain precoding of users is designed based on singular value decomposition and minimum mean square error criterion. Based on the block diagonalization precoding method, the digital domain precoding is obtained by using the obtained analog equivalent channel, and the transmission power is allocated based on the water-filling algorithm to further improve the communication quality. Simulation results show that the proposed algorithm is superior to the traditional algorithm in terms of spectral efficiency and energy efficiency, and the satisfactory performance can be obtained under imperfect channel conditions.

关 键 词：大规模多输入多输出 毫米波 部分连接结构 多用户混合预编码 

分 类 号：TN929.5[电子电信—通信与信息系统]