计算机科学 ›› 2019, Vol. 46 ›› Issue (8): 121-126.doi: 10.11896/j.issn.1002-137X.2019.08.020
廖勇1, 杨馨怡1, 夏茂菡2, 王博2, 李守智2, 沈轩帆1
LIAO Yong1, YANG Xin-yi1, XIA Mao-han2, WANG Bo2, LI Shou-zhi2, SHEN Xuan-fan1
摘要: 针对高速移动场景下信道时频域选择性衰落特性给多入多出(Multiple Input Multiple Output,MIMO)系统的预编码带来的技术挑战,文中提出了一种基于贪婪算法的用户调度方案,该方案以信道容量最大化为目标对用户进行调度并排序;进而为用户调度提出一种基于贪婪算法的改进模代数预编码(Tomlinson-Harashima Precoding,THP)算法,根据用户调度结果,对信道矩阵进行选择重构,将重构后的信道矩阵应用到THP算法中,以对传统THP进行优化,从而提高预编码精度。仿真结果表明,相比传统预编码,所提预编码具有更优的误码率(Bit Error Ratio,BER)性能和信道容量,并且其鲁棒性能更好,验证了所提算法能有效地适应高速移动场景。
中图分类号:
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