摘要
提出基于线性星座预编码 (LCP预编码 )的VBLAST OFDM系统 ,该系统通过在OFDM子载波信道间进行LCP预编码来获得频率分集增益 ,适用于宽带无线通信 .同时提出一种VBLAST LCP联合解码器 ,该解码器结合了经典的VBLAST解码方法和基于最大似然准则 (ML)的LCP解码 .仿真表明相比与未编码的VBLAST OFDM系统 ,VBLAST OFDM LCP系统至少能提供 8.5dB的增益 .VBLAST OFDM LCP系统的编码是无冗余的 ,而且编码解码结构比较简单 ,有很强的应用价值 .
The system for VBLAST-OFDM based on LCP precoding was proposed for wideband wireless communications. Frequency diversity was obtained by LCP precoding over OFDM sub-carriers. A combined VBLAST-LCP decoder was proposed. It combined successive cancellation of classical VBLAST with Maximum Likelihood decoding of LCP precoding. The simulation result showed that VBLAST-OFDM-LCP can gain at least 8.5 dB compared with VBLAST-OFDM.
出处
《华中科技大学学报(自然科学版)》
EI
CAS
CSCD
北大核心
2004年第4期83-86,共4页
Journal of Huazhong University of Science and Technology(Natural Science Edition)