用于MIMO SC-FDE系统逼近分集接收界的迭代检测算法  

An iterative reaching-diversity bound detector for MIMO SC-FDE systems

作　　者：何波[1] 杜岩[1] 曹鲁慧[2] 李军[3] He Bo;Du Yan;Cao Luhui;Li Jun(School of Information Science and Engineering,Shandong University,Qingdao 266237,China;Informazition Office,Shandong University,Jinan 250100,China;School of Electronic Information Engineering,Qilu University of Technology(Shandong Academy of Sciences),Jinan 250353,China)

机构地区：[1]山东大学信息科学与工程学院,青岛266237 [2]山东大学信息化工作办公室,济南250100 [3]齐鲁轻工业大学(山东省科学院)电气工程学院,济南250353

出　　处：《Journal of Southeast University(English Edition)》2023年第1期62-67,共6页东南大学学报（英文版）

基　　金：The National Natural Science Foundation of Shandong Province(No.62071276);the Key Research and Development Project of the Ministry of Science and Technology(No.2020YFC0833203).

摘　　要：为了提高MIMO SC-FDE系统的检测可靠性、降低系统复杂度,提出一种新的迭代干扰消除检测算法,并推导出分集接收界作为评价算法性能优劣的依据.该检测算法采用基本的线性均衡算法提供初始值,在迭代中尽量消除层间干扰,利用空间分集增益逐步提高检测可靠性.结果表明,该算法在4QAM调制方式下,E b/N 0为9 dB时逼近分集接收界;在16QAM调制方式下,E b/N 0为16 dB时逼近分集接收界.该算法一轮迭代的计算复杂度与发射天线的数目成线性关系,天线规模为3×3以上时算法复杂度低于V-BLAST.因此,所提算法适用于天线规模数大于等于3、调制进制数大于等于4的系统中,在倾向于采用large MIMO系统的5G及后5G时代具有高效性和实用性.To improve the detection reliability and reduce the computational complexity of multiple-input-multiple-output(MIMO)single carrier-frequency-domain equalization(SC-FDE)systems,a novel iterative signal detection algorithm,called iterative interference cancellation(IIC),is proposed.Moreover,a receive diversity lower bound(RDLB)is derived as a benchmark to evaluate the bit error rate performance.The proposed IIC utilizes the initial value provided by the basic linear equalization algorithm,progressively removes the inter-layer interference by the iterative process,and gradually improves the reliability of the detected results.The results indicate that the proposed IIC approaches to the RDLB at the E b/N 0 of 9 dB and 16 dB for 4-ary and 16-ary quadrature amplitude modulations,respectively.The computational complexity of an iterative loop is linear to the number of transmit antennas,and the overall complexity is lower than that of a popular vertically Bell laboratory layered space-time detector when the antenna size is larger than 3×3.Therefore,the proposed algorithm remarkably enhances the reliability of MIMO SC-FDE systems with an antenna size of not less than 3×3 and is computationally efficient and practical even in large-dimension MIMO systems for 5th-generation(5G)or beyond 5G communications.

关 键 词：分集接收界 空间复用系统 MIMO SC-FDE 迭代检测算法 

分 类 号：TN929.5[电子电信—通信与信息系统]