一种高效的基于OFDM的频率选择性V-BLAST检测方法  

An efficient detection technique based on OFDM for V-BLAST over frequency-selective channels

作　　者：姜煜[1] 张曙[2] 白兴宇[1] 

机构地区：[1]杭州应用声浮研究所,浙江杭州310012 [2]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2007年第6期682-687,共6页Journal of Harbin Engineering University

摘　　要：针对频率选择性V-BLAST(贝尔实验室垂直分层空时)系统,提出了一种基于OFDM(正交频分复用)的检测方法.从原理上证明,采用OFDM技术可将频率选择性V-BLAST系统转换为平衰落V-BLAST系统.针对平衰落V-BLAST系统,提出了一种新的基于MMSE准则的高效解码算法,称为排序串行多层干扰抵消算法.理论分析表明,所提的基于OFDM的方法相对于其他频率选择性V-BLAST检测方法,在计算复杂度方面优势明显,同时具有良好的检测性能.仿真实验给出了所提检测方法与各种现有频率选择性V-BLAST检测方法的性能对比,证明了所提方法的有效性.A new and efficient detection method based on OFDM （orthogonal frequency division multiplexing） for V-BLAST （vertical bell labs layered space-time） over frequency-selective channels is proposed. First, theoretical analysis shows that the frequency-selective V-BLAST can be transformed into flat fading V-BLAST by using OFDM technology. Then, a new and powerful decoding algorithm for V-BLAST over a flat fading channel is presented, the ordered serial multiple-layer interference cancellation algorithm based on MMSE criterion. Compared with existing detection methods for V-BLAST over frequency-selective channels, computational complexity of the proposed detection method is significantly reduced. At the same time, its detection performance is also excellent. Finally, in simulations, the proposed method is compared with existing detection methods, demonstrating its efficiency and validity.

关 键 词：频率选择性信道 贝尔实验室垂直分层空时系统 多输入多输出 正交频分复用 

分 类 号：TN911.22[电子电信—通信与信息系统]